JP6764769B2 - Power supply control device, power supply control program, power rate setting system - Google Patents

Description

The present invention is a power supply control device and a power supply that control the supply state of power to the demand side based on the predicted power consumed by a load operating on the demand side equipped with a power storage facility while receiving power from the power supply side. The present invention relates to a control program and a power charge setting system that sets a power charge based on the power consumption on the demand side.

In the balance between supply and demand of electricity, it is important to adjust the “simultaneous equal amount”.

Simultaneous equal amount means adjusting so that demand (electricity used) and supply (electricity produced) are always the same in order to realize stable use of electricity. If the balance between supply and demand is lost, electricity may become unstable due to voltage fluctuations, or if the balance is extremely lost, a power outage may occur.

By the way, the adjustment of the same amount at the same time is basically handled by the power supply side (for example, the power company) except for some parts. In particular, in recent years, the burden of adjusting the same amount at the same time has become heavier on the power supply side, such as the purchase system of electric power by solar power generation and the existence of new electric power companies.

Therefore, it is conceivable to adjust the same amount at the same time on the power demand side. One example of this is power load suppression control (hereinafter referred to as demand suppression control).

In the conventional demand suppression control, the load of the load equipment is suppressed. For example, in an air conditioner, relaxation of an air conditioner set temperature, limit control of an air conditioner outdoor unit, and the like are executed, and in a lighting fixture, reduction of lighting dimming intensity and the like are executed.

On the other hand, on the power demand side, power generation equipment such as a generator or a storage battery may be installed separately from the power received from the power supply side (commercial power). With this configuration, demand suppression control can be performed by starting the generator and charging and discharging the storage battery (hereinafter referred to as charging / discharging).

As an example, Patent Document 1 describes that a generator is started and apportioned in order to preserve the remaining charge of the storage battery.

More specifically, the demand side has an electric generator and a storage battery, and determines the ratio of the output command value to the motor generator and the storage battery based on the excess amount when the predicted demand power exceeds the target power. It is composed.

Further, Patent Document 2 describes that a power source having the optimum cost is selected.

More specifically, the difference between the demand forecast value and the supply plan value is distributed to the controlled object based on the cost optimization method.

JP-A-2016-010292 Japanese Unexamined Patent Publication No. 2014-143835

However, in the technique described in Patent Document 1, there is a concern that another problem including economic efficiency, such as an increase in fuel consumption of the motor generator, may be aggravated, and in the technique described in Patent Document 2, the storage battery residue of the storage battery may be deteriorated. When the amount is insufficient, or when the demand suppression control amount is large, the correspondence is insufficient, and the prior art including the techniques described in Patent Document 1 and Patent Document 2 is used for optimizing the demand suppression control. Has not been reached.

In consideration of the above facts, the present invention predicts the timing of deviation from the power consumption planned in advance on the demand side at an early stage when the power supply side and the demand side equipped with the power storage facility mutually control the amount of power. The purpose is to obtain a power supply control device and a power supply control program that can optimize demand suppression control on the demand side.

Further, in addition to the above objectives, it is an object to obtain an electric power charge setting system capable of increasing the motivation for demand suppression control on the demand side.

The present invention targets a demand side having a power storage facility capable of charging and discharging and a load that consumes power while receiving power from the power supply side, and a subdivided unit period within a predetermined block period. A calculation that calculates and updates the predicted power consumed in the unit period each time the unit period elapses by the formulation means for formulating the planned power consumed by the load and the predetermined prediction calculation process. When there is a specific unit period in which the difference between the planned power and the predicted power deviates from a predetermined allowable range in the unit period in which the predicted power is updated by the means and the calculation means, the present time. in each unit period to reach a certain unit period, and control means for performing at least one of the charge and discharge control, and the load reduction control of the power storage equipment from the control unit, the deviation of the specific unit period Is a deviation exceeding the upper limit of the permissible range, the electric power for charging the power storage facility by distributing the charge amount so as not to exceed the upper limit of the permissible range in each unit period until reaching the specific unit period. It is a supply control device.

According to the present invention, in the formulation means, the planned power consumed by the load is formulated for each subdivided unit period within a predetermined block period for the demand side. The demand side is equipped with a power storage facility capable of charging and discharging and a load that consumes power while receiving power from the power supply side. The power consumed by the load is information that can be easily known by the demand side, and is more accurate than formulating the planned power from the power supply side.

When the planned power is started from the period of the defined block, the calculation means calculates the predicted power consumed in each unit period by a predetermined prediction calculation process. For example, the calculation time may be at the start of each unit period, or may not be synchronized at the start and may be prepared before the unit period to be calculated. That is, the calculation result is updated at the start of each unit period.

Next, in the unit period in which the predicted power is calculated by the calculation means, there may be a specific unit period in which the difference between the planned power and the predicted power deviates from a predetermined allowable range. The permissible range is preferably set on the plus side and the minus side with respect to the planned power.

In the control means, when there is a specific unit period in which the difference between the planned power and the predicted power deviates from the predetermined allowable range in the unit period for which the predicted power is calculated by the calculation means, the specific unit period is set. At least one of charge / discharge control and load suppression control of the power storage equipment is executed in a part or all of the unit period until it is reached.

As a result, the consumption of the electric power supplied from the electric power supply side can be maintained within the allowable range of the planned electric power, and the demand suppression control on the demand side can be optimized.

In the present invention, the control means determines whether or not charge / discharge control of the power storage facility can be executed based on the remaining charge of the power storage facility.

When the control means executes charge / discharge control of the power storage equipment, it is determined whether or not the charge / discharge control of the power storage equipment can be executed based on the remaining charge of the power storage equipment. The remaining amount of stored electricity may be obtained by measuring, or may be obtained from the difference between the planned power and the actual power actually consumed by the load.

As a result, for example, by discharging the power storage equipment, it is possible to perform proportional distribution processing that gives priority to the power storage equipment, such as covering the shortage when securing the electric power for a specific unit period by load suppression.

In the present invention, when the deviation in the specific unit period exceeds the upper limit of the allowable range, the control means supplies electric power due to the discharge of the power storage facility to the load in the specific unit period. At the same time, when the amount of electric power due to the discharge of the power storage equipment is insufficient, load suppression is executed for the load.

If the deviation of the specific unit period exceeds the upper limit of the permissible range, the power from the power supply side is consumed (excessive consumption) by the deviation from the planned power. Therefore, in a specific unit period, at least the excess power consumed by the load is covered by the power generated by the discharge of the power storage facility.

Further, when the amount of electric power due to the discharge of the power storage equipment is insufficient, load suppression is executed for the load.

As a result, even in a specific unit period, the load suppression can be reduced and the planned power can be kept within the allowable range.

In the present invention, the charging of the power storage facility is executed by receiving electric power from the power supply side, and the control means controls the specific unit when the deviation of the specific unit period exceeds the upper limit of the allowable range. In the period, when the electric power generated by the discharge of the power storage equipment is supplied to the load, when the remaining storage amount is insufficient, the power storage equipment is used in each unit period until the specific unit period is reached. Charge.

Charging of the power storage equipment is executed by receiving electric power from the electric power supply side.

In the control means, when the deviation in the specific unit period exceeds the upper limit of the permissible range, the remaining amount of electricity stored is insufficient when the power is supplied to the load by the discharge of the power storage equipment in the specific unit period. If so, the power storage equipment is charged in each unit period until the specific unit period is reached.

As a result, the power required for a specific unit period can be secured within the allowable range of the planned power.

In the present invention, if the upper limit of the allowable range in the specific unit period is not resolved even after charging the power storage facility, the load is further charged in each unit period until the specific unit period is reached. And execute load suppression.

If the upper limit of the allowable range in the specific unit period is not resolved even after charging the power storage facility, load suppression is further executed for the load in each unit period until the specific unit period is reached.

As a result, the power required for a specific unit period can be more reliably secured within the allowable range of the planned power.

The present invention is a power supply control program that causes a computer to function as the power supply control device of the present invention.

The present invention is a power charge setting system that sets a power charge on the demand side using the power supply control device of the present invention, and at the end of a predetermined power charge setting period, for each power charge setting period that has ended, When the power transition determination means for determining whether or not the power consumption has changed within the allowable range based on the planned power and the determination result of the power transition determination means deviate from the allowable range, the following It has a power charge adjusting means that makes the power charge in the power charge setting period higher than usual and makes the power charge in the next power charge setting period cheaper than usual when there is no block that deviates from the permissible range. It is an electricity rate setting system.

In the present invention, in the power transition determining means, at the end of the predetermined power charge setting period, whether or not the power consumption has changed within the permissible range based on the planned power for each of the completed power charge setting periods is determined. judge.

For example, one block is set as one day, and the presence or absence of deviation from the permissible range of each block is totaled every month (28 to 31 blocks).

In the power charge adjusting means, when the judgment result of the power transition determination means deviates from the permissible range, the power charge in the next power charge setting period is set higher than usual, and there is no block deviating from the permissible range. In this case, the electricity charge in the next electricity charge setting period will be cheaper than usual.

That is, when setting the power charge, it is possible to increase the motivation for demand suppression control on the demand side by setting the merits and demerits depending on whether or not the power consumption changes according to the planned power.

As described above, in the power supply control device and the power supply control program of the present invention, when the power supply side and the demand side provided with the power generation facility mutually control the power amount, the power consumption planned in advance on the demand side is used. It is possible to predict the deviation time of the above at an early stage and optimize the demand suppression control on the demand side.

Further, in addition to the above effects, the electric power charge setting system of the present invention can increase the motivation for demand suppression control on the demand side.

It is the schematic which shows the equipment for transmitting electric power between the electric power supply side and the demand side which concerns on 1st Embodiment. It is a control block diagram of the power supply control device which concerns on 1st Embodiment. It is a functional block diagram which shows the flow of the control mainly for load control and charge / discharge control in the power supply control apparatus which concerns on 1st Embodiment. It is a flowchart which shows the electric power supply control routine which concerns on 1st Embodiment. It is a flowchart which shows the charge / discharge and load suppression control routine of the storage battery which concerns on 1st Embodiment. It is a timing chart which shows the transition of the power consumption which concerns on the 1st Embodiment, (A) is a situation after one unit period (30 minutes) elapses, (B) is predicted from the situation of FIG. 6 (A). Indicates the discharge and load suppression state. It is a timing chart which shows the transition of the power consumption which concerns on the 1st Embodiment, (A) is the case where charging is executed just before deviating from the allowable range of planned power, (B) is the allowable range of planned power. The case where charging and load suppression are executed just before the deviation is shown. It is a timing chart which shows the transition of the power consumption which concerns on the 1st Embodiment, (A) is the situation at the end of one block period, (B) is the unit period of power surplus in FIG. 8 (A). The case where charging is executed is shown. It is a flowchart which shows the electric power charge setting control routine which concerns on 2nd Embodiment.

"First embodiment"
FIG. 1 is a schematic view showing a power transmission facility for supplying electric power from the electric power supply side to the demand side according to the first embodiment.

On the power supply side 10, the electric power generated by the power plant 12 is transmitted to the substation 14.

The power plant 12 is mainly composed of, for example, a hydraulic power plant 12A, a thermal power plant 12B, and a nuclear power plant 12C, but in addition, power generation using renewable energy (geothermal, wind power, etc.) and depleting energy (shale) Includes power generation using gas, methane hydrate, etc.).

At the power plant 12, as an example, the generated electric power is transmitted to the substation 14 via the transmission line 16 at a voltage of 500,000 V to 275,000 V.

The substation 14 gradually lowers the voltage at, for example, an ultrahigh voltage substation, a primary substation, and an intermediate substation in stages. From the substation 14, electric power having a voltage of 154,000 V to 22,000 V is transmitted to a large factory or a railway substation on the demand side.

Further, the electric power of the substation 14 is transmitted to the distribution substation 20 via the transmission line 18.

In the distribution substation 20, as an example, the power of the voltage of 154,000V to 22,000V received from the substation 14 is stepped down to a voltage of 6,600V. The electric power stepped down to a voltage of 6,600V is transmitted to a medium-sized factory or a building on the demand side. In the first embodiment, the configuration of the power supply control will be described by taking the demand side (hereinafter referred to as the demand side 26) receiving power from the distribution substation 20 as an example (details will be described later).

Further, the electric power of the distribution substation 20 is transmitted to the pole transformer 24 via the transmission line 22.

In the pole transformer 24, as an example, the power of the voltage of 6,600V received from the distribution substation 20 is transformed to 200V to 100V and transmitted to a small factory, a house, etc. on the demand side.

FIG. 1 shows an example of a power wiring system to a load (described later) provided on a demand side 26 (for example, a middle factory, a building) receiving power from a distribution substation 20.

The demand side 26 is not limited to facilities that receive power from the distribution substation 20, but is a small factory or house that receives power from the pole transformer 24, or a large factory or railway that receives power from the substation 14. It may be a substation.

The demand side 26 includes a main power meter 28, and is wired to the input side of the main power meter 28 so that power is supplied from the distribution substation 20.

The output side of the main power meter 28 is connected to the power receiving facility 30. The power receiving facility 30 includes, for example, a breaker, an earth leakage breaker, and the like, and has a role of distributing power to a load described later.

On the demand side 26 of the first embodiment, the air conditioning equipment 32 and the lighting equipment 34 are provided as loads.

Electric power is supplied to the air conditioning equipment 32 from the power receiving equipment 30 via the air conditioning power meter 36 and the transformer 38. The operation (temperature adjustment, air volume adjustment, wind direction adjustment, etc.) of the air conditioning equipment 32 is controlled by instructions from the air conditioning control device 40.

Electric power is supplied to the lighting equipment 34 from the power receiving equipment 30 via the lighting power meter 42 and the transformer 44. The operation (lighting, extinguishing, etc.) of the lighting equipment 34 is controlled by an instruction from the lighting control device 46.

Further, the demand side 26 of the first embodiment includes a storage battery 48 as a power storage facility. The storage battery 48 can be charged and discharged (hereinafter, collectively referred to as “charge / discharge”).

When charging the storage battery 48, electric power is supplied via the storage battery power meter 50 and the transformer 52. Further, when discharging, the storage battery 48 supplies electric power to at least one of the loads (air conditioning equipment 32 and lighting equipment 34) by a wiring system (not shown).

The power information measured by the air-conditioning power meter 36, the lighting power meter 42, and the storage battery power meter 50 is not directly applied to the power supply control in the first embodiment, but should be monitored sequentially. Is preferable. Further, for example, it can be applied to collation of measured power information by the main power meter 28. Further, it can be applied as a substitute for the failure of the main power meter 28.

Charging / discharging of the storage battery 48 is executed according to an instruction from the storage battery control device 54.

Here, the air conditioning control device 40, the lighting control device 46, and the storage battery control device 54 are connected to the power supply control device 56. The power supply control device 56 executes load control for the air conditioning equipment 32 and the lighting equipment 34, and charge / discharge control for the storage battery 48.

As shown in FIG. 2, the power supply control device 56 includes a microcomputer 58. The microcomputer 58 includes a CPU 60, a RAM 62, a ROM 64, an input / output port (I / O) 66, and a bus 68 such as a data bus or a control bus connecting them. The power supply control program according to the first embodiment is stored in the ROM 64, and when the CPU 60 operates according to the power supply control program, the power supply control is executed for the demand side 26.

A large-scale storage device (hard disk) 70 is connected to the I / O 66, and the power supply program may be stored in the hard disk 70 or stored in a storage medium such as a USB memory or SD card (not shown). You may do so.

Further, the air conditioning control device 40 is connected to the I / O 66 via the interface (I / F) 72, the lighting control device 46 is connected via the I / F 74, and the storage battery control device 54 is connected via the I / F 76. There is. Further, a main power meter 28, an air conditioning power meter 36, a lighting power meter 42, and a storage battery power meter 50 are connected to the I / O 66.

FIG. 3 is a functional block diagram showing a control flow mainly for load control and charge / discharge control in the power supply control device 56. The blocks in FIG. 3 are classified according to their functions, and do not limit the hardware configuration of the power supply control device 56.

The power supply control device 56 includes a power load planning unit 78 and a power load prediction update unit 80, each of which is connected to a power load difference prediction calculation unit 82.

The power load planning unit 78 formulates the power load of the next block before the start (for example, the day before) of one block (for example, one day) described later. Hereinafter, the formulated power load is referred to as planned power.

The power load prediction update unit 80 predicts the subsequent power load (hereinafter referred to as predicted power) every one unit period (for example, 30 minutes) described later. That is, the predicted power is updated every unit period. It should be noted that the predicted timing of the predicted power does not need to be synchronized with the switching of the one unit period, and may be prepared before that.

The predicted power is predicted by a predetermined prediction calculation process. Specifically, input weather information including temperature, humidity, and general weather conditions that affect the temperature setting of air conditioning equipment, and history information of power consumption based on product market trends in the case of demand seasons and production plants. As a parameter, the predicted power is obtained by a neural network or the like. However, the method of obtaining the predicted power is not limited to this method.

For example, the average value or the latest value of the power consumption of the same month in the past may be applied, and as an example, the parameter value affecting the power consumption such as the latest temperature may be added and applied. May be good.

The power load difference prediction calculation unit 82 calculates the difference between the planned power and the predicted power.

The power load difference prediction calculation unit 82 is connected to the storage battery state prediction calculation unit 84, and the calculation result is sent to the storage battery state prediction calculation unit 84. The storage battery state prediction calculation unit 84 sets the upper limit and the lower limit of the predetermined width based on the received calculation result (difference) based on the planned power, and whether the difference exceeds the upper limit or falls below the lower limit. Predict (prediction information).

On the other hand, the power load planning unit 78 is connected to the power load difference calculation unit 86. The power measurement unit 88 is currently connected to the power load difference calculation unit 86. The current power measurement unit 88 measures the actually consumed power (hereinafter referred to as actual power) based on the information from the main power meter 28, and sends it to the power load difference calculation unit 86.

The power load difference calculation unit 86 calculates the difference between the actual power and the planned power (hereinafter, referred to as a real-time difference).

The power load difference calculation unit 86 is connected to the storage battery output command unit 90. The storage battery output command unit 90 determines whether to charge or discharge the storage battery 48 with respect to the storage battery control device 54 based on the real-time difference (difference between the actual power and the planned power) for each unit period. Command.

The storage battery output command unit 90 instructs the storage battery control device 54 to discharge when the actual power exceeds the upper limit of the planned power, and when the actual power is less than the lower limit of the planned power, as a basic control. Instruct to charge. The storage battery control device 54 executes charging / discharging of the storage battery 48 based on the instruction. The above control is used as the basic control because it discharges even if there is surplus charging capacity in order to keep it within the allowable range of the planned power in the entire period of one block, so that it can be charged in a unit period below the lower limit of the planned power. This is because irregular control such as executing the above to intentionally consume power may be executed.

Further, the storage battery control device 54 is connected to the storage battery state prediction calculation unit 84. Therefore, the storage battery state prediction calculation unit 84 receives prediction information predicted based on the difference calculated by the power load difference prediction calculation unit 82 and measurement information (charge / discharge amount, remaining charge amount) of the storage battery 48. To be aggregated. Based on this information, in the storage battery state prediction calculation unit 84, the time when discharge (or charge) is required (unit period) and the time when load suppression is necessary (unit period) within the planned period of one block. ) Is included in the planned power deviation time (the time when the predicted power deviates from the allowable range of the planned power).

Information on the deviation time of the planned power predicted by the storage battery state prediction calculation unit 84 (information on the specific unit period) is sent to the storage battery control device 54 and the load suppression planning unit 92.

The storage battery control device 54 plans to charge the storage battery 48 so that the actual power falls within the upper and lower limits of the planned power, and uses a plurality of unit periods to reach a specific unit period in advance. , Control to perform charging in order to increase the remaining charge.

Here, the predicted power for a specific unit period may still deviate from the allowable range of the planned power when the remaining charge of the storage battery 48 is discharged.

Therefore, the load suppression planning unit 92 plans and plans in advance load suppression so that the actual power falls within the upper and lower limits of the planned power by using a plurality of unit periods that reach a specific unit period. The result is sent to the load suppression setting command unit 94. That is, in the first embodiment, the load suppression is positioned as a secondary control when the discharge control of the storage battery 48 is the main.

The load suppression setting command unit 94 is connected to the air conditioning control device 40 and the lighting control device 46, and controls the operating states of the air conditioning equipment 32 and the lighting equipment 34 based on the conditions planned by the load suppression planning unit 92. And execute load suppression.

The operation of the first embodiment will be described below with reference to the flowcharts of FIGS. 4 and 5.

FIG. 4 is a flowchart showing a power supply control routine.

In step 100, it is determined whether or not it is the control start time. That is, it is determined whether or not it is the start time of one block (one day). The control start time may be, for example, 0:00 when the date changes, or the activity time of the day (in the case of a company, the start time such as 09:00). In the first embodiment, it is assumed that one block is 24 hours and the control is always continued.

If a negative determination is made in step 100, it is determined that control is being continued within the block period, and the process proceeds to step 110.

Further, if an affirmative determination is made in step 100, it is determined that a new block is started, the process proceeds to step 104, the formulated planned power is read out, and the process proceeds to step 108.

In step 108, the upper limit and the lower limit are set with the planned power as a reference (intermediate value), and the process proceeds to step 110. The width of the upper limit and the lower limit is the allowable range for judging that the power is consumed as planned. As an example, ± 3% of the formulated planned power is preferable. As a result, the planned power for each initial unit period is set with a band-shaped allowable range.

In step 110, it is determined whether or not one unit period (for example, 30 minutes) in the block has elapsed. If an affirmative determination is made in step 110, it is determined that one unit period has elapsed, and the process proceeds to step 112.

In step 112, the power forecast for the next unit period and thereafter is executed and updated. That is, in the elapsed unit period, there is no problem if it is as planned, but if the actual power deviates from the standard (intermediate value) of the planned power, there is a possibility of deviation thereafter. Therefore, the transition of electric power is predicted based on the degree of deviation, and the electric power forecast is updated. Note that the power prediction after the next unit period may not be synchronized when one unit elapses as in the affirmative determination in step 110, but may be predicted before that.

In the next step 114, in the updated power forecast, it is determined whether or not there is a unit period exceeding the upper limit of the planned power width.

If a negative determination is made in step 114, the process proceeds to step 116 to determine whether or not there is a unit period below the lower limit of the planned power width.

If a negative determination is made in step 116, it is determined that the electric power changes within the allowable range of the planned electric power width, and the process returns to step 100.

If a positive judgment is made in step 116, the process proceeds to step 118, and the storage battery 48 is set to be charged in a unit period below the lower limit of the allowable range of the planned power width (execution is shown in FIG. 5). Step 152), the process returns to step 100. That is, when the power falls below the lower limit of the allowable range of the planned power width, the planned power is surplus, and the storage battery 48 can be charged as a preparation. If it is fully charged, it does not need to be charged.

On the other hand, if an affirmative judgment is made in step 114, the process proceeds to step 120 to identify the unit period exceeding the upper limit of the planned power width as a specific unit period, and then proceeds to step 122 to obtain the current storage battery information ( The charge / discharge amount and the remaining charge amount) are read out, and the process proceeds to step 124.

In step 124, it is determined whether or not the current remaining amount of electricity can be kept within the allowable range of the planned power (corresponding) in the specific unit period.

If an affirmative determination is made in step 124, the process proceeds to step 126, the storage battery 48 is set to be discharged in a specific unit period (for execution, see step 160 in FIG. 5), and the process returns to step 100. As a result, the power consumption in a specific unit period can be kept within the allowable range of the planned power.

If a negative determination is made in step 124, it is determined that the charge amount of the storage battery 48 is insufficient, the process proceeds to step 128, the load suppression amount after discharge depletion is calculated, and then the process proceeds to step 130. Then, in each unit period up to the specific unit period, the charging of the storage battery 48 is set so as not to exceed the planned power (for execution, see step 152 in FIG. 5), and the process proceeds to step 132.

In step 132, it is determined whether or not the remaining charge is sufficient by charging in each unit period up to the specific unit period.

If an affirmative determination is made in step 132, it is determined that the power consumption in the specific unit period can be kept within the allowable range of the planned power based on the charge amount of the storage battery 48, and the process returns to step 100.

If a negative determination is made in step 132, it is determined that the power consumption in the specific unit period cannot be kept within the allowable range of the planned power only by the charge amount of the storage battery 48, and the process proceeds to step 134. The load suppression is distributed and set in each unit period up to the specific unit period (for execution, see step 156 in FIG. 5), and the process returns to step 100.

FIG. 5 is a flowchart showing the charge / discharge set by the power supply control routine of FIG. 4, the storage battery charge / discharge for executing the load suppression control, and the load suppression control routine.

In step 150, it is determined whether or not the charging setting unit period is reached. This charging setting corresponds to the setting in step 118 and step 130 of FIG.

If an affirmative determination is made in step 150, the process proceeds to step 152, charging is started, and the process proceeds to step 154. If a negative determination is made in step 150, the process proceeds to step 154.

In step 154, it is determined whether or not the load suppression setting unit period is reached. This load suppression setting corresponds to the setting in step 134 of FIG.

If an affirmative determination is made in step 154, the process proceeds to step 156, load suppression is started, and the process proceeds to step 158. If a negative determination is made in step 154, the process proceeds to step 158.

In step 158, it is determined whether or not it is a specific unit period (discharge setting unit period). This discharge setting corresponds to step 126 in FIG.

If an affirmative decision is made in step 158, the process proceeds to step 160, discharge is started, and this routine ends. If a negative determination is made in step 158, this routine ends.

According to the first embodiment, before the start of one block (one day), the demand side declares the power expected to be consumed in the block as the planned power, and the actual power consumption is actually performed. The transition of electric power is monitored in one unit period (30-minute unit period), and based on the difference between the actual electric power and the planned electric power, it is determined whether or not the actual electric power deviates from the permissible range, and as a pretreatment, a storage battery By charging the 48 and / or performing load suppression, deviations from the permissible range were avoided. That is, if there is a surplus, the storage battery 48 is charged, and the load is suppressed within a range in which the demand side does not feel inconvenience, thereby realizing that the power consumption changes as planned.

Since the degree of inconvenience varies depending on the consumer, it is preferable for the power supply side to grasp the current situation by, for example, tabulating a questionnaire, etc., and to learn sequentially to adjust the degree of load suppression.

(Power transition simulation)
6 to 8 are timing charts when simulating the power transition in the power supply control based on the control flowcharts of FIGS. 4 and 5.

6 to 8 show an upper limit (see arrow B in FIG. 6A) and a lower limit (see arrow B in FIG. 6A) based on the planned power (see arrow A in FIG. 6A) before the start of control of one block. It is assumed that (see arrow C) in A) is set.

The actual power actually consumed (see arrow D in FIG. 6 (A)) with respect to this planned power (and allowable range) shall be indicated by a thick line, and the current position shall be indicated by a black circle (●). To do.

(As of 11:30 time)
FIG. 6 shows the situation when 30 minutes have passed from the start of control of one block (11:30 as the time).

In FIG. 6A, the actual power exceeds the planned power within the permissible range after 30 minutes have passed. It is the predicted power (see arrow E in FIG. 6A) that predicts the subsequent power transition in consideration of this excess amount.

The predicted power at the time of this update exceeds the upper limit as the time from 13:30 to 15:30.

In order to return the 13:30 to 15:30 to the permissible range (at least, the upper limit position), discharge from the storage battery 48 and load control are required.

In FIG. 6B, when it is predicted that the storage battery 48 will start discharging from 13:30, which is the time when the permissible range is deviated (see arrow F in FIG. 6B), the remaining charge is at 14:30. Will be exhausted (see arrow G in FIG. 6B). Therefore, if it is predicted that the load suppression will be executed after the time 14:30 (see the arrow H in FIG. 6B), the power can be changed within the allowable range.

(As of 13:30 time)
FIG. 7 is an addition to the simulation of FIG. 6 in which preparatory measures are taken for electric power exceeding the permissible range (time 13:30 to 15:30).

As a means to deal with in advance, charging of the storage battery 48 and load control.

FIG. 7A is a timing chart of the power transition simulation in which the preparatory measures by charging the storage battery 48 are executed. In FIG. 7, the description of each characteristic curve shown in FIG. 6 is omitted.

FIG. 7A shows the upper limit B in each unit period until time 13:30 in order to increase the remaining amount of the storage battery 48 used when the allowable range (upper limit B) of the planned power A is exceeded in the predicted power. The storage battery 48 is charged within a range not exceeding the limit.

As a result, the remaining amount of electricity stored, which was around 30% at present (time 11:30) in FIG. 6, becomes 50% at present (time 13:30) in FIG. 7 (A), and the permissible range is increased accordingly. The discharge amount of the storage battery 48 in the deviation time zone (13:30 to 15:30) can be increased.

In FIG. 7B, in addition to the pretreatment (charging of the storage battery 48) in FIG. 7A, load suppression is performed in each unit period until time 13:30, for example, within a range in which the consumer does not feel inconvenience. Execute.

The power consumption (actual power) can be suppressed by the amount of this load suppression. In addition, in FIG. 7B, the load suppressed portion is applied to the charging of the storage battery 48, so that it can be set to 60% at the present time (time 13:30) in FIG. 7B. The dotted line charge amount in FIG. 7B indicates the charge amount in FIG. 7A.

(As of 16:30 time)
FIG. 8 adds to the simulation of FIG. 6 that the amount of charge is increased toward the future (after tomorrow) with respect to the power consumed within the allowable range (time 15:30 to 16:30). It is a thing.

FIG. 8 (A) deviates from the permissible range for load suppression concentrated at time 14:30 to 15:30 in FIG. 6 (B) in the time zone (13:30 to 15:30) deviating from the permissible range. It was averaged (averaged) in the range of time (13:30 to 15:30). This can reduce the inconvenience on the consumer side.

FIG. 8B shows a range in which the upper limit B is not exceeded in each unit period from time 15:30 to 16:30 after the time zone (13:30 to 15:30) outside the permissible range has elapsed. Then, the storage battery 48 is charged. By this charging, the block can be kept within the permissible range of the planned power A, and the charge amount of the storage battery 48 in the next block can be secured.

In the first embodiment, when the specific unit period exceeds the upper limit of the permissible range, the shortage power is covered by discharging from the storage battery 48, but the shortage power in the specific unit period is predetermined. If it is within the reference value (a level at which the demand side 26 does not feel dissatisfied), the load may be suppressed only by suppressing the load of at least one of the air conditioning equipment 32 and the lighting equipment 34. As a result, the remaining charge of the storage battery 48 can be preserved.

"Second embodiment"
The second embodiment of the present invention will be described below.

The feature of the second embodiment is the power charge to encourage the demand side 26 to consume the power within the allowable range of the planned power under the power supply control executed in the first embodiment. There is a feature in the configuration to set.

(Electricity charge setting control)
In the second embodiment, in order to encourage the demand side 26 to consume the power according to the planned power, the power charge to be charged depending on whether or not the actual power has changed within the allowable range of the planned power. Was increased or decreased.

For example, the permissible range set when the planned power is declared is ± 3% of the planned power.

In the second embodiment, when the actual power changes within the allowable range of the planned power, a predetermined normal power charge is charged.

On the other hand, if the upper limit of the planned power (+ 3% of the planned power) is exceeded, a surcharge for the normal area will be charged as a penalty.

Here, if the power falls below the lower limit of the planned power (-3% of the planned power), it contributes from the viewpoint of energy saving because the power consumption is small, but from the power supply side, the power is transmitted by the planned power. Therefore, it becomes a surplus power supply. Therefore, even if the power falls below the lower limit of the planned power, a surcharge will be charged for the normal area as a penalty.

In addition, within the permissible range of planned power, the smaller the fluctuation range, the more the power charge may be discounted.

FIG. 9 is a flowchart showing a power charge setting control routine executed on the power supply side 10.

In step 170, it is determined whether or not it is time to set the electric power charge. If a negative determination is made in step 170, it is determined that it is not the time to set the power charge, and this routine ends.

If an affirmative judgment is made in step 170, it is determined that it is time to set the electric power charge, and the process proceeds to step 172 to total the results of the simultaneous equal amount for each unit period (that is, the simultaneous equal amount for 30 minutes).

In the next step 174, the electricity charge for each unit period is calculated.

That is, when the actual power is within the permissible range of the planned power, the discount rate is set according to the error from the planned power (reference value), and the power charge for the unit period is calculated. Then, the process proceeds to step 176. In this case, the normal charge is when the maximum error is within the permissible range.

If the actual power is in a unit period outside the permissible range of the planned power, a premium rate is set as a penalty, the power charge for the unit period is calculated, and the process proceeds to step 176. The larger the error, the higher the premium rate may be.

In step 176, the electric power charges for each unit period calculated in step 174 are totaled, and then the process proceeds to step 178 to output the calculated electric power charge information to, for example, the control device of the electric power charge billing system. finish.

10 Power supply side 12 Power plant 12A Hydroelectric power plant 12B Thermal power plant 12C Nuclear power plant 14 Substation 16 Transmission line 18 Transmission line 20 Distribution substation 22 Transmission line 24 Pillar transformer 26 Demand side 28 Main power meter 30 Power reception Equipment 32 Air conditioning equipment 34 Lighting equipment 36 Air conditioning power meter 38 Transformer 40 Air conditioning control device 42 Lighting power meter 44 Transformer 46 Lighting control device 48 Storage battery 50 Storage battery power meter 52 Transformer 54 Storage battery control device 56 Power supply control device 58 Microconverter 60 CPU
62 RAM
64 ROM
66 I / O port (I / O)
68 Bus 70 Large-scale storage device (hard disk)
72 I / F (interface)
74 I / F
76 I / F
78 Power Load Planning Department 80 Power Load Forecast Update Department (Formulation means)
82 Power load difference prediction calculation unit (calculation means)
84 Storage battery status prediction calculation unit 86 Power load difference calculation unit 88 Current power measurement unit 90 Storage battery output command unit 92 Load suppression planning unit (control means)
94 Load suppression setting command unit (control means)

Claims (7)

The above-mentioned subdivided unit period within a predetermined one-block period for the demand side having a power storage facility capable of charging and discharging and a load that consumes power while receiving power from the power supply side. Formulation means for formulating planned power consumed by load, and
A calculation means that calculates and updates the predicted power consumed in the unit period by a predetermined prediction calculation process every time the unit period elapses .
When there is a specific unit period in which the difference between the planned power and the predicted power deviates from a predetermined allowable range in the unit period in which the predicted power is updated by the calculation means, the specific period is specified from the present time. It has a control means for executing at least one of charge / discharge control and load suppression control of the power storage facility in each unit period until the unit period is reached .
The control means
When the deviation of the specific unit period exceeds the upper limit of the allowable range, the charge amount is dispersed so as not to exceed the upper limit of the allowable range in each unit period until the specific unit period is reached. A power supply control device that charges power storage equipment . The control means
The power supply control device according to claim 1, wherein it is determined whether or not charge / discharge control of the power storage equipment can be executed based on the remaining charge of the power storage equipment. The control means
When the deviation of the specific unit period exceeds the upper limit of the permissible range, the power generated by the discharge of the power storage equipment is supplied to the load in the specific unit period, and the power generated by the discharge of the power storage equipment is supplied. The power supply control device according to claim 1 or 2, wherein when the amount is insufficient, load suppression is performed on the load. Charging of the power storage facility is executed by receiving power from the power supply side.
The control means
When the deviation of the specific unit period exceeds the upper limit of the allowable range, the remaining amount of electricity stored is insufficient when the electric power generated by the discharge of the power storage equipment is supplied to the load in the specific unit period. When, the power supply control device according to any one of claims 1 to 3, which charges the power storage facility in each unit period until the specific unit period is reached. If the upper limit of the allowable range in the specific unit period is not resolved even after charging the power storage facility, the load is further suppressed for the load in each unit period until the specific unit period is reached. The power supply control device according to claim 4. Computer,
The power supply control program that functions as the power supply control device according to any one of claims 1 to 5. A power charge setting system for setting a power charge on the demand side using the power supply control device according to any one of claims 1 to 5.
At the end of the predetermined power charge setting period, the power transition determination means for determining whether or not the power consumption has changed within the permissible range based on the planned power for each completed power charge setting period,
In the determination result of the power transition determination means, when the power charge deviates from the permissible range, the power charge in the next power charge setting period is set higher than usual, and when there is no block deviating from the permissible range, the next Electricity rate adjustment means that makes the electricity rate cheaper than usual during the electricity rate setting period of
Power pricing system with.