RU2558659C1 - Sagging calculation for each linear wire of three-phase three-wire power transmission line at its load matching - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention may be used at transmission of electric energy to consumers by means of a three-phase three-wire power transmission line (2), which load matching is attained in result of the fulfilment of certain conditions varying seasonally due to the change in primary parameters of the three-phase three-wire power transmission line determined with the calculation of sagging for each wire of the above line and respective distance between the linear wire and the ground (18). It is suggested to measure the seasonal change in wire sagging and the distance between the linear wire (5) and the ground by means of a distance meter (25). Matching includes the comparison of the actual and reference resistance of the load, voltage at the line end or currents supplied to the load. Initial data on voltage and current in the line can be obtained through interfaces or sensors made in a form of voltage or current transformers, spectrum analysers, voltage dividers and alternating-current shunts. In result of initial data processing the processor generates control signals for correcting bodies.

EFFECT: reduced losses and improved capacity of the power transmission line.

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Description

The invention relates to electrical engineering and can be used in the design, installation, commissioning and operation of power lines (power lines) of medium, high and ultra-high voltage.

The transmission of electric energy through extended power lines, as well as electric energy of increased frequency through relatively non-extended power lines is ensured by: single-wire power lines with one pair of electromagnetic field waves (incident and reflected); in three-wire - in three pairs; on four-wire - four, etc. [one]. As a result of matching the power lines with the electric load, the transmission capacity of the power lines increases due to the exclusion of the reflected wave of the electromagnetic field, the degree of distortion of the voltage and current curves decreases, the reliability of the electrical equipment increases, the operation of relay protection, automation and communication is normalized, the environmental situation in the area of operation of the line is improved power transmission.

Known methods for matching communication lines with the load [2]. However, the technical elements used here, such as a differential amplifier, are not designed to operate at high voltage, for example 110 kV [GOST R 54149-2010]. This means that the specifics of the implementation of these methods is quite peculiar and inapplicable in power lines with distributed parameters of medium, high and ultra-high voltage.

The condition of the coordinated mode of operation of a single-wire power transmission line [3] is known, on the basis of which the device [patent RU 2390924] operates, where the coordinated mode of operation of a single-wire power line is implemented. The disadvantage of the invention is that under such a condition of coordination it is impossible to achieve coordination of all linear wires of an asymmetric three-phase three-wire high-voltage power line [1] with an electric load.

The prototype is an invention [4], which describes a method for matching a three-wire power line with an electric load at frequencies of pronounced harmonic components of currents and voltages. The disadvantage of this method of matching power lines with the load is that they do not take into account seasonal, load (decrease, increase in power line current) changes in the values of the primary parameters of the operated power line, which are associated with a change in the sag of each linear wire of a three-phase three-wire power line and a change in the distance between these linear wires and ground.

Arrows sagging wires must comply with the standards specified in the rules of the device electrical installations (PUE) [5]. The arrows of the wire sag will change during the operation of the power lines, as well as the distances between these linear wires and the ground, the secondary parameters of the power lines will also change, which will ultimately lead to a change in the conditions of the agreed mode of operation of the power lines.

The purpose of the invention is to formulate a method for accounting for the sag arrows of each linear wire of a three-phase three-wire high-voltage power line and the distance between the line wire and the ground when matching power lines with electric load based on continuous monitoring of the primary parameters of this power line in real time. Using the indirectly measured value of the sag of each linear wire and the distance between the linear wire and the ground, the conditions for matching a three-phase three-wire high-voltage power transmission line with an electric load are determined [6-9].

The technical result is to ensure stable compliance with the conditions for matching a three-phase three-wire high-voltage power line with electric load, which vary seasonally depending on the value of the transported power line current. Fulfillment of the conditions for matching a three-phase three-wire power transmission line with an electric load entails a reduction in electric energy losses, an increase in the transmission line capacity, a decrease in the degree of distortion of the voltage and current curves along the entire length of the power line.

The technical result is achieved by the fact that the method of accounting for the sag of each linear wire of a three-phase three-wire power line when it is matched with the load, which consists in the fact that the initial information about the voltages and currents in the power line through the interface devices or sensors enters the processor, and the values of the sag arrows of each linear wire and the distance between the linear wire and ground for each linear wire are determined once on the basis of reference or measured data, e and the values are involved in determining the primary parameters of the power line, with which they obtain the conditions for matching the power line with the distributed parameters with the electric load, characterized in that the processor clarifies the conditions for matching the three-phase three-wire power line with the electric load for each linear wire, which can vary from -for seasonal increase or decrease in temperature, the formation of ice on linear wires, increase or decrease in values transported current, which entails a change in the sag of the wire and a change in the distance between the linear wire and the ground, and therefore a change in the primary parameters of the power line, on the basis of which the secondary parameters of the power line are obtained and the conditions for matching a three-phase three-wire power line with electrical load are determined , for three linear wires, their sag arrows are individually evaluated by real-time range finders located in die electrical structures made, for example, of plastic, which are suspended on each line wire through a clamp and a polymer insulator, dielectric structures with rangefinders are located in fixed places along the entire length of the power line, rangefinders are powered by a battery that collects electricity from the solar battery , indirectly measured values of the sag of the wire and indirectly measured values of the distance between the linear wire and the ground are transmitted to Computer essor, where, according to a specialized program, the primary and secondary parameters of a three-phase three-wire power line are determined, taking into account the values of the sag of each linear wire and the distance between the linear wires and ground, the currents and voltages that correspond to the currents and voltages of the agreed three-phase three-wire power line are specified this as a result of comparing the actual and reference values of the load resistances, voltages at the end of the line or current in entering the load generated control signals for the correcting bodies, as which may be used OLTC power transformers, automated production facilities, power storage, the active power sources, such as small or medium or hydroelectric power plants of other types.

The invention is illustrated by diagrams: Fig. 1 shows an algorithm for indirectly measuring by the range finders the arrows of the sag of each linear wire of a three-phase three-wire power transmission line and indirect measurement of the distance between the linear wires of the power transmission line and the ground; Fig. 2 shows the operating algorithm of the range finder, which indirectly measures the sag of the linear wire of a three-phase three-wire power line and indirectly measures the distance between the linear wire of the power line and the ground; Figure 3 shows the processor operation algorithm.

The following notation is used in the figures:

1 - support power lines 2;

2 - three-phase three-wire high-voltage power lines;

3 - device (C), the shell of which is made of a dielectric, such as plastic;

4 - an insulator, such as LK-70/220-ACh UHL1;

5 - linear wire power lines 2;

6 - analog-to-digital Converter (ADC U) device 3 (U);

7 - processor (P U) device 3 (U);

8 - digital-to-analog Converter (DAC U) device 3 (U);

9 - antenna (A U);

10 - grounding;

11 - clamp, such as PGN-5-3V;

12 - showing or recording recorder (RO);

13 - solar battery (SB);

14 - the point of start of the beam 16 emanating from the laser 28 of the range finder 25 (D);

15 - the end point of the reflected beam 17 located on the photodetector 27;

16 - the beam emanating from the laser 28 of the range finder 25 (D);

17 - beam 16 reflected from the earth 18;

18 - earth;

19 - the end point on the ground 18 of the beam 16 and the starting point on the ground 18 of the beam 17;

20 - control room (DP);

21 - dielectric;

22 - antenna (A) of the control room 20 (DP);

23 - electric battery rangefinder 25 (D);

24 - electronic unit;

25 - range finder (D);

26 - analog-to-digital Converter (ADC);

27 - photodetector of a range finder 25 (D);

28 - laser rangefinder 25 (D);

29 - a structure of a dielectric, such as plastic, where the range finder 25 (D) is placed;

30 - processor (P);

31 - digital-to-analog converter (DAC);

32 is a block of the distance value N2 (N2) measured by the range finder 25 (D);

33 is a block indirectly measured value of the sag (N1) of the linear wire 5;

34 is a block indirectly measured distance (N4) between the line wire 5 and the ground 18;

35 - a specialized program (LEP3 v.1.00) for predicting the magnitude of the main characteristics of the electrical energy of a high-voltage power transmission line of a three-phase three-wire version 2;

36 is a block of the magnitude of the sag (Nz) of the linear wire 5;

);37 - block amount ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}N}$$

);

38 - block distance (N _V ) between the surface of the linear wire 5 and the ground 18;

).39 - block of the sum of the results ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}M}$$

)

The essence of the proposed development is to implement using technical means, such as range finders [patent RU 2340871], suspended from the linear wires through clamps and insulators, indirect measurement of the sag of each linear wire and indirect measurement of the distance between each linear wire of the power transmission line and the ground. Thus, the seasonal changes in the primary parameters of the operated extended three-phase three-wire high-voltage power line are monitored. This will lead to a seasonal change in the load calculated on the basis of the mathematical model of power lines [1] for matching a three-phase three-wire high-voltage power line with an electric load [6-9]. Stabilization of these matching conditions is achieved for the existing power lines using the invention [4].

Let it be necessary to carry out monitoring of the seasonal or load (decrease or increase in the current transmitted through the power lines) by changing the primary parameters [1] of the operated extended three-phase three-wire high-voltage power lines, as well as its subsequent coordination with the electrical load. Consider the algorithm of the invention by the example of a high-voltage single-circuit three-phase power transmission line.

от опоры устанавливают устройства 3 (У), которые подвешивают на каждый линейный провод 5 через зажим 11 (рис.2) и изолятор 4, выполненный из полимера. В устройстве 3 (У) (рис.1, 2) размещен дальномер 25 (Д) (рис.2), устройство которого описано в изобретении [патент RU 2340871] или в изобретении [патент RU 2381447]. Дальномер 25 (Д) предназначен для определения величины расстояния N2 или величины расстояния от места, где расположен лазер 28, до земли 18. Стрелки на рис.2 показывают направление луча 16 от начальной точки 14 лазера 28 дальномера 25 (Д) до конечной точки 19 на земле 18, являющейся начальной точкой луча (отраженного) 17, распространяющегося по направлению к конечной точке 15, находящейся на фотоприемнике 27. Таким образом определяется расстояние между землей 18 и дальномером 25 (Д) [патент RU 2340871].Fig. 1 shows an algorithm for indirectly measuring the sag of each linear wire of a three-phase three-wire power transmission line by the range finders and indirectly measuring the distances between the linear wires of the power transmission line and the ground to control the seasonal change in the primary parameters of the three-phase three-wire uninsulated high-voltage power line. Here, the object under control is a three-phase three-wire high-voltage power line 2, the linear wires 5 of which are suspended from the supports 1 using insulator strings 4. The insulator strings 4 of one stance 1 are located at a distance L from the strings of insulators 4 of the other stance 1. On distance $$\raisebox{1ex}{$L$}\!\left/ \!\raisebox{-1ex}{$2$}\right.$$

from the support, devices 3 (Y) are installed, which are suspended on each linear wire 5 through the clamp 11 (Fig. 2) and the insulator 4 made of polymer. In the device 3 (Y) (Fig. 1, 2) there is a range finder 25 (D) (Fig. 2), the device of which is described in the invention [patent RU 2340871] or in the invention [patent RU 2381447]. The range finder 25 (D) is designed to determine the distance N2 or the distance from the place where the laser 28 is located to the ground 18. The arrows in Fig. 2 show the direction of the beam 16 from the starting point 14 of the laser 28 of the range finder 25 (D) to the end point 19 on the ground 18, which is the starting point of the beam (reflected) 17, propagating towards the end point 15 located on the photodetector 27. Thus, the distance between the ground 18 and the range finder 25 (D) is determined [patent RU 2340871].

High-voltage supports have a grounding of 10 (Fig. 1).

Figure 2 shows the algorithm of the range finder 25 (D), which indirectly measures the sag of the line wire 5 (Fig. 1, 2) of a three-phase three-wire power line 2 (Fig. 1) and indirectly measures the distance between the linear wire 5 (Fig. 1, 2) power transmission line 2 (Fig. 1) and ground 18 (Fig. 1, 2).

Next, we consider an algorithm for accounting for the sag of one linear wire 5 of a power line 2 (Fig. 1) and the distance between the linear wire 5 (Fig. 1, 2) of a power line 2 (Fig. 1) and ground 18 (Fig. 1, 2). The algorithm is applicable, in principle, for any linear wire 5 of power lines 2 (Fig. 1).

Device 3 (U) (Fig. 1, 2) contains a range finder 25 (D) (Fig. 2). A clamp 11, such as PGN-5-3V, on which a device 3 (U) is suspended through an insulator 4, is fixed on a linear wire 5.

The device 3 (U) has a structure 29 made of a dielectric, such as plastic, on the sides of which there are solar batteries 13 (SB), such as SZU2-BSA-7.5 or SZU2-BSA-15U.

The range finder 25 (D), which is part of device 3 (Y) (Fig. 1, 2), measures the distance N2 32 (N2) (Fig. 2, 3) from the laser 28 (Fig. 2) of the range finder 25 (D), located in suspension by means of an insulator 4, to the earth 18. The range finder 25 (D) receives electricity from a power source, which is a solar battery 13 (SB). Electricity is stored in the battery 23 of the range finder 25 (D). The battery 23 of the range finder 25 (D) is a source of electricity for the laser 28. Part of the structure 29 may be filled with a dielectric 21 or may be hollow.

The analog-to-digital converter 6 (ADC U) of device 3 (U) (Fig. 1, 2) allows the analog signals generated in the electronic unit 24 (Fig. 2) to be converted into discrete signals, after which they are sent to processor 7 (П У). Discrete signals from processor 7 (P U) are supplied to a digital-to-analog converter unit 8 (DAC U), such as Enfora 1218 GSM modem, SPT 961, LNG 763, etc. [10] where they are converted to analog. Then, the results of indirect measurement and measurement of the distance N2 32 (N2) (Fig. 2, 3) are transmitted via the communication channel using the antenna 9 (А У) (Fig. 2) installed outside the device 3 (У) to the control room 20 ( DP) to the antenna 22 (A), from where they enter the block of the analog-to-digital converter 26 (ADC), such as the Enfora 1218 GSM modem [10]. Then the data goes to the processor 30 (P) and then to the digital-to-analog converter unit 31 (DAC), where it is converted to analog. Further, the measurement results, including the result of measuring the distance N2 32 (N2) (Fig. 2, 3), are displayed on a indicating or recording recorder 12 (PO).

Figure 3 shows the algorithm of the processor 7 (P U) (Fig. 2) using the example of the range finder 25 (D) for each line wire 5 (Fig. 1, 2) of a power transmission line 2 (Fig. 1). Figure 3 shows how, from 6 (ADC U) (Fig. 2), signals are received in processor 7 (P U), illustrating the distances N2 32 (N2) measured by the range finder 25 (D) (Fig. 2, 3) points 14 (Fig. 2) to 19 or from point 19 to 15, which then enter block 33 (N 1) (Fig. 3). In block 33 (N 1), the value of the sag of the line wire 5 (Fig. 1, 2) is determined by the formula:

N1 = L- (N2 + N),

where L is the suspension height of wire 5 on insulator 4 (Fig. 1) at support 1, mm; N is the distance from point 14 (Fig. 2) or 15 to the surface of a linear wire 5 (Fig. 1, 2) facing the ground 18, mm.

The value of block N2 32 (N2) (Fig. 2, 3) enters block 34 (N4) (Fig. 3), where the distance between the linear wire 5 (Fig. 1, 2) and ground 18 is determined by the formula:

N4 = N2 + N.

Block 35 (LEP3 v.1.00) in Fig. 3 illustrates the use in the proposed method of a specialized program for predicting the values of the main characteristics of electric energy in a transmission line of a three-phase three-wire version [11]. Using this program, the effective values of the complex values of currents and voltages, the propagation constants of the waves of the electromagnetic field along the wires of the power transmission line 2 (Fig. 1), and the values of the intrinsic and mutual wave resistances [1] are determined. Block 35 (LEP3 v.1.00) serves to determine the values of the arrows of the sag of the linear wire 5 (Fig. 1, 2) and the distances between the linear wires 5 and ground 18 involved in determining the primary parameters of the power transmission line 2 (Fig. 1) [1] on the basis of which the secondary parameters of the power transmission line 2, which participate in the formation of the conditions for matching the three-phase three-wire high-voltage power line 2 with the electric load [6-9] and their stabilization [4], are determined.

Arrows of sag 33 (N 1) (Fig. 3) of each line wire 5 (Fig. 1, 2) and the distance values 34 (N4) (Fig. 3) between the linear wires 5 (Fig. 1, 2) and ground 18 are involved in determining the primary parameters of a three-phase three-wire high-voltage power line 2 (Fig. 1). This is displayed by the following formulas [1] (for line wires A and B):

1) the capacitive coupling between the linear wire 5 (Fig. 1, 2), A (Fig. 1) and the earth’s surface 18 (transverse parameter of the power transmission line 2) is defined as follows [1]:

where H is the distance between the linear wire 5 and its mirror reflection relative to the surface of the earth 18, mm; s is a constant coefficient equal to 41.4 · 10 ⁶ km / F; r is the radius of the wire, mm, l is the length of the investigated section of the power transmission line 2, mm

Taking into account the sag of the linear wire 5 (Fig. 1, 2), A (Fig. 1), a three-phase three-wire high-voltage power line 2, the distance between the wire 5 and its mirror reflection is determined by the formula [1]:

where N4 is the distance between wire 5 (Fig. 1, 2) and ground 18 (value 38 (N _V ) (Fig. 3)), mm; N1 - arrow of wire sag 5 (Fig. 1, 2) (value 36 (Nз) (Fig. 3)), mm;

2) capacitive coupling between two linear wires 5 (Fig. 1, 2), A and B (Fig. 1) of circular cross section with an error of up to 5% is defined as follows [1]:

H _ij = H + d,

where H _ij is the distance between the first wire 5 (Fig. 1, 2) and the mirror reflection of the second, mm; d is the distance between the wires 5, mm;

3) the resistive component of the electromagnetic coupling between the two linear wires 5, that is, the active conductivity between them, is determined [1]:

where ρ ₊ and ρ _- are the bulk density of positive and negative charges in space from wire 5 of power transmission line 2 (Fig. 1) to the surface of the earth 18 (Fig. 1, 2); V ₊ and V _- are the velocity of these charges; µ ₀ = 4π · 10 ^-7 GN / m is the magnetic constant; n is the harmonic component; f ₀ is the fundamental frequency;

4) a quantitative assessment of the inductive coupling between the linear wires 5 of the investigated three-phase three-wire high-voltage power lines 2 (Fig. 1) is determined by the formula [1]:

These formulas are implemented in block 35 (LEP3 v.1.00) (Fig. 3); they allow us to determine the primary parameters of a three-phase three-wire high-voltage power line 2 (Fig. 1). Then, on the basis of the calculated primary parameters, the secondary parameters of the considered power transmission line 2 are determined, as well as the conditions for its coordination with the electric load. The obtained design conditions for matching a three-phase three-wire high-voltage power line 2 with an electric load must be implemented for an existing power line 2 that transfers electric energy to a load [4].

) (рис.3). Одновременно из блока 35 (LEP3 v.1.00) поступает информация о величине расстояния между линейным проводом 5 (рис.1, 2) и землей 18 в блок 38 (N_V) (рис.3). Величины, сформированные в блоках 34 (N4) и 38 (N_V), сравниваются между собой. В результате такого сравнения получается разница между косвенно измеренной величиной блока 34 (N4) расстояния между линейным проводом 5 (рис.1, 2) и землей 18 и величиной блока 38 (N_V) (рис.3) расстояния между линейным проводом 5 (рис.1, 2) и землей 18, полученной ранее. Результат сравнения поступает в блок суммы результатов 39 ( $${\displaystyle \sum _{i=1}^{3}M}$$

) (рис.3).From block 35 (LEP3 v.1.00) (Fig. 3), information is received on the size of the sag of the line wire 5 (Fig. 1, 2), which is part of the three-phase three-wire high-voltage power line 2 (Fig. 1), to block 36 (Nз ) (Fig. 3). The values generated in blocks 33 (N1) and 36 (N3) are compared with each other. As a result of this comparison, the difference between the indirectly measured value of the block 33 (N1) of the sag of the linear wire 5 (Fig. 1, 2) and the size of the arrow of the sag of the block 36 (N3) (Fig. 3) of the linear wire 5 (Fig. 1, 2) ) received earlier. The result of the comparison goes to the block of the sum 37 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}N}$$

) (Fig. 3). At the same time, information about the distance between the linear wire 5 (Fig. 1, 2) and ground 18 is transmitted from block 35 (LEP3 v.1.00) to block 38 (N _V ) (Fig. 3). The values generated in blocks 34 (N4) and 38 (N _V ) are compared with each other. As a result of such a comparison, the difference between the indirectly measured value of the block 34 (N4) of the distance between the linear wire 5 (Fig. 1, 2) and ground 18 and the value of the block 38 (N _V ) (Fig. 3) of the distance between the linear wire 5 (Fig. .1, 2) and ground 18 obtained earlier. The result of the comparison goes to the block of the sum of the results 39 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}M}$$

) (Fig. 3).

) и в блоке суммы результатов 39 ( $${\displaystyle \sum _{i=1}^{3}M}$$

), передаются из 7 (П У) (рис.2) в 8 (ЦАП У). Одновременно из 7 (П У) в 8 (ЦАП У) передаются: косвенно измеренная величина стрелы провеса 33 (N1) (рис.3) линейного провода 5 (рис.1, 2); косвенно измеренная величина расстояния N4 34 (N4) (рис.2, 3) между линейным проводом 5 (рис.1, 2) и землей 18; измеренная дальномером 25 (Д) (рис.2) величина расстояния N2 32 (N2) (рис.2, 3). Затем аналоговые сигналы высокой частоты при помощи антенны 9 (А У) (рис.2) передаются на принимающую антенну 22 (А) диспетчерского пункта 20 (ДП). Дальше аналоговые сигналы преобразуются в цифровые в блоке аналого-цифрового преобразователя 26 (АЦП), такого как GSM модем Enfora 1218. Затем цифровые сигналы поступают в процессор 30 (П), где фиксируется результат работы алгоритма рис.2 в виде информации о величинах блоков 32 (N2) (рис.3), 33 (N1), 37 ( $${\displaystyle \sum _{i=1}^{3}N}$$

), 34 (N4) и 39 ( $${\displaystyle \sum _{i=1}^{3}M}$$

). В процессор 30 (П) (рис.2) может поступать от 26 (АЦП) только величина блока 32 (N2) (рис.3), а затем реализуется часть алгоритма, показанного на рис.3 и определяющая величины блоков 33 (N1), 37 ( $${\displaystyle \sum _{i=1}^{3}N}$$

), 34 (N4) и 39 ( $${\displaystyle \sum _{i=1}^{3}M}$$

). Таким образом можно выбирать, от какого процессора - 7 (П У) (рис.2) или 30 (П), будет осуществляться уточнение величины стрелы провеса линейного провода 5 (рис.1, 2) и величины расстояния между линейным проводом 5 и землей 18, участвующих в формировании первичных параметров ЛЭП 2 (рис.1), для которой выполняется стабилизация условий согласования с электрической нагрузкой [4]. Дальше информация в виде цифрового сигнала от процессор 30 (П) (рис.2) поступает в блок цифроаналогового преобразователя 31 (ЦАП), где преобразуется в аналоговый, и затем величины от блоков 32 (N2) (рис.3), 33 (N1), 37 ( $${\displaystyle \sum _{i=1}^{3}N}$$

), 34 (N4) и 39 ( $${\displaystyle \sum _{i=1}^{3}M}$$

) выводятся на показывающий или самопишущий регистрирующий прибор 12 (РО) (рис.2).Then the values obtained in the block of the sum 37 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}N}$$

) and in the block of the sum of results 39 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}M}$$

) are transmitted from 7 (P U) (Fig. 2) to 8 (DAC U). At the same time, from 7 (P U) to 8 (DAC U) are transmitted: indirectly measured value of the sag 33 (N1) (Fig. 3) of the linear wire 5 (Fig. 1, 2); the indirectly measured value of the distance N4 34 (N4) (Fig. 2, 3) between the linear wire 5 (Fig. 1, 2) and ground 18; the distance N2 32 (N2) measured by the range finder 25 (D) (Fig. 2) (Fig. 2, 3). Then, the high-frequency analog signals using the antenna 9 (A U) (Fig. 2) are transmitted to the receiving antenna 22 (A) of the control room 20 (DP). Further, the analog signals are converted to digital in the block of the analog-to-digital converter 26 (ADC), such as the Enfora 1218 GSM modem. Then the digital signals are sent to processor 30 (P), where the result of the algorithm in Fig. 2 is recorded in the form of information about the values of blocks 32 (N2) (Fig. 3), 33 (N1), 37 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}N}$$

), 34 (N4) and 39 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}M}$$

) Only the value of block 32 (N2) (Fig. 3) can come to processor 30 (P) (Fig. 2) from 26 (ADC), and then the part of the algorithm shown in Fig. 3 and determining the values of blocks 33 (N1) is implemented , 37 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}N}$$

), 34 (N4) and 39 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}M}$$

) Thus, you can choose from which processor - 7 (P U) (Fig. 2) or 30 (P), the magnitude of the sag of the linear wire 5 (Fig. 1, 2) and the distance between the linear wire 5 and the ground will be refined 18 involved in the formation of the primary parameters of power lines 2 (Fig. 1), for which stabilization of the matching conditions with the electric load is performed [4]. Further, information in the form of a digital signal from processor 30 (P) (Fig. 2) enters the digital-to-analog converter unit 31 (DAC), where it is converted to analog, and then the values from blocks 32 (N2) (Fig. 3), 33 (N1 ), 37 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}N}$$

), 34 (N4) and 39 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}M}$$

) are displayed on a indicating or recording recorder 12 (PO) (Fig. 2).

), изображенная на рис.3, которая, когда величина разницы ΔN1, или ΔN2, или ΔN3 между измеренными косвенно величиной стрелы провеса линейного провода 5 (рис.1, 2) блока 33 (N1) (рис.3) и полученной несколько ранее величиной этой стрелы провеса линейного провода 5 (рис.1, 2) блока 36 (Nз) (рис.3) отлична от нуля, выполняется обновление ранее полученной величины стрелы провеса линейного провода 5 (рис.1, 2) в блоке 36 (Nз) (рис.3) более поздним значением стрелы провеса этого провода 5 (рис.1, 2) блока 33 (N1) (рис.3). Новое значение стрелы провеса линейного провода 5 (рис.1, 2) поступает в блок 35 (LEP3 v.1.00) (рис.3).At the same time, the part of the algorithm related to block 37 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}N}$$

), shown in Fig. 3, which, when the difference is ΔN1, or ΔN2, or ΔN3 between the indirectly measured sag of the linear wire 5 (Fig. 1, 2) of block 33 (N1) (Fig. 3) and obtained somewhat earlier the value of the sag of the line wire 5 (Fig. 1, 2) of block 36 (N3) (Fig. 3) is non-zero, the previously obtained value of the sag of the line wire 5 (Fig. 1, 2) in block 36 (Nz) is updated ) (Fig. 3) with a later value of the sag of this wire 5 (Fig. 1, 2) of block 33 (N1) (Fig. 3). The new value of the sag of the linear wire 5 (Fig. 1, 2) arrives at block 35 (LEP3 v.1.00) (Fig. 3).

), изображенная на рис.3, в которой, когда величина разницы ΔN4, или ΔN5, или ΔN6 между измеренными косвенно величиной расстояния между линейным проводом 5 (рис.1, 2) и землей 18 блока 34 (N4) (рис.3) и полученной несколько ранее величиной этого расстояния между линейным проводом 5 (рис.1, 2) и землей 18 блока 38 (N_V) (рис.3) отлична от нуля, выполняется обновление ранее полученной величины расстояния между линейным проводом 5 (рис.1, 2) и землей 18 в блоке 38 (N_V) (рис.3) более поздним значением расстояния между линейным проводом 5 (рис.1, 2) и землей 18 блока 34 (N4) (рис.3). Новые значения расстояния между линейным проводом 5 (рис.1, 2) и землей 18 поступают в блок 35 (LEP3 v.1.00) (рис.3).At the same time, the part of the algorithm related to block 39 ( $${\displaystyle \sum _{i=\mathrm{one}}^{3}M}$$

), shown in Fig. 3, in which, when the difference is ΔN4, or ΔN5, or ΔN6 between the indirectly measured distance between the linear wire 5 (Fig. 1, 2) and ground 18 of block 34 (N4) (Fig. 3) and the previously obtained value of this distance between the linear wire 5 (Fig. 1, 2) and the ground 18 of block 38 (N _V ) (Fig. 3) is different from zero, the previously obtained value of the distance between the linear wire 5 (Fig. 1) is updated , 2) and ground 18 in block 38 (N _V ) (Fig. 3) with a later distance between the line wire 5 (Fig. 1, 2) and ground 18 of block 34 (N4) (Fig. 3). New values of the distance between the linear wire 5 (Fig. 1, 2) and ground 18 enter block 35 (LEP3 v.1.00) (Fig. 3).

Program 35 (LEP3 v.1.00) works as part of the invention [4].

Information sources

1. Bolshanin, G.A. Distribution of low-quality electric energy over sections of electric power systems. In 2 book Prince 1 / G.A. Bolshanin. - Bratsk: BrSU, 2006 .-- 807 p.

2. Kerky, D. Coordination of the output impedance using fully differential operational amplifiers / D. Kerky // Components and Technologies. - 2010. - No. 5. - S.150-154.

3. Bolshanin, G.A. Correction of the quality of electric energy / G.A. Bolshanin - Bratsk: State Educational Institution of Higher Professional Education “BrSU”, 2007. - 120 p.

4. A method for matching a three-wire power line with an electric load at frequencies of pronounced harmonic components of currents and voltages: Patent No. 2488218, Russia, IPC Н03К 3/00 / В.А. Kozlov, G.A. Bolshanin. - Federal State Budgetary Educational Institution of Higher Professional Education "Bratsk State University", No. 2012110296/08; Claim 03/16/2012; Publ. 07/20/2013.

5. Rules for the installation of electrical installations / Ministry of Energy P.F. - 7th ed. - M.: Publishing House NTs ENAS, 2003 .-- 160 p. - il.

6. Kozlov, V.A. Conditions for matching a homogeneous three-wire high-voltage power line of 10 kV and above with a load / V.A. Kozlov, G.A. Bolshanin // Materials of the VII international scientific and practical conference. - Prague: Printing House "Education and Science", 2011. - P.86-90.

7. Kozlov, V.A. The agreed mode of operation of a homogeneous three-wire power line / V.A. Kozlov, G.A. Bolshanin // Systems. Methods Technologies. - 2011. - No. 4. - S. 70-76.

8. Kozlov, V.A. The agreed mode of operation of a homogeneous three-wire power transmission line of 220 kV and higher as a means of improving the electromagnetic environment / V.A. Kozlov, G.A. Bolshanin // Science today: theoretical aspects and application practice. Part 2: Sat scientific labor. - Tambov: Publishing House of TROO “Business-Science-Society”, 2011. - P.63-66.

9. Kozlov, V.A. Terms of coordination of an asymmetric three-phase three-wire high-voltage power line / V.A. Kozlov // Materials of the VIII international scientific-practical conference "The scientific industry of the European continent - 2012". - Prague: Printing House "Education and Science", 2012. - P.63-66.

10. The use of GSM-modems in conjunction with energy metering devices NPO LOGIC / ZAO NPF LOGIC. - M .: LOGIC, 2010 .-- 10 p.

11. Certificate of state registration of a computer program No.2010611988 "Calculation of the parameters of a three-phase three-wire uninsulated power line (LEP3 v.1.00)."

Claims (1)

The method of accounting for the sag of each linear wire of a three-phase three-wire power line when it is matched with the load, which consists in the fact that the initial information about the voltages and currents in the power line through the interface devices or sensors is supplied to the processor, and the magnitude of the sag of each linear wire and the distance between the line wire and ground for each line wire are determined once on the basis of reference or measured data, these values are involved in determining the primary parameters of the power line, with the help of which the conditions for matching the power line with distributed parameters with electric load are obtained, characterized in that the processor clarifies the conditions for matching a three-phase three-wire power line with electric load for each line wire, which can change due to seasonal increase or lowering the temperature, the formation of ice on the linear wires, increasing or decreasing the value of the transported current, which leads to battle, a change in the sag of the wire and a change in the distance between the linear wire and the ground, and hence a change in the primary parameters of the power line, on the basis of which the secondary parameters of the power line are obtained and the conditions for matching the three-phase three-wire power line with the electrical load are determined for three linear wires sag arrows are evaluated individually by real-time range finders located in dielectric structures, made for example, from plastic, which are suspended on each line wire through a clamp and a polymer insulator, dielectric structures with rangefinders are located in fixed places along the entire length of the power line, rangefinders are powered by an energy-storage battery receiving electricity from a solar battery, indirectly measured values arrows of wire sag and indirectly measured distance between a linear wire and ground are transmitted to a computer processor, where it is specialized In this program, the primary and secondary parameters of the three-phase three-wire transmission line are determined taking into account the values of the sag of each linear wire and the distance between the linear wires and the ground, the values of currents and voltages that correspond to the currents and voltages of the agreed three-phase three-wire transmission line are specified, after which as a result of comparison the actual and reference values of the load resistances, voltages at the end of the line, or currents entering the load, are formed at ravlyaetsya corrective signals for organs, as which may be used OLTC power transformers, automated production facilities, power storage, the active power sources, such as small or medium or hydroelectric power plants of other types.

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