CN109830968A - Cascade H bridge type SVG system and method based on hybrid decentralised control - Google Patents
Cascade H bridge type SVG system and method based on hybrid decentralised control Download PDFInfo
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- CN109830968A CN109830968A CN201910267351.1A CN201910267351A CN109830968A CN 109830968 A CN109830968 A CN 109830968A CN 201910267351 A CN201910267351 A CN 201910267351A CN 109830968 A CN109830968 A CN 109830968A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
Present disclose provides a kind of Cascade H bridge type SVG system and method based on hybrid decentralised control, the disclosure can be realized active when power grid falls and Reactive Power Control, and SVG exports the balance control of electric current, the stabilization and balance control of DC capacitor voltage；With at low cost, high reliablity, the fast advantage of failure response speed.
Description
Technical field
This disclosure relates to a kind of Cascade H bridge type SVG system and method based on hybrid decentralised control.
Background technique
Only there is provided background technical informations relevant to the disclosure for the statement of this part, it is not necessary to so constitute first skill
Art.
With the fast development of power electronics, modern scientist and computer technology, frequency control equipment and electric locomotive
Etc. disequilibriums, impact and nonlinear load a large amount of application has been obtained in network system, this makes originally fragile electricity
Net becomes more fragile.Especially in weak grid, grid voltage sags situation occurs often, this is to the electric power electricity in system
The normal operation of sub- equipment adversely affects.The power electronic equipment of abnormal running is but also idle in system in turn
Become further serious with power quality problems such as harmonic waves.
Reactive power and power quality close relation, for power grid, a large amount of reactive power can bring following influence:
(1) increase of power electronic equipment can bring route active loss in power grid, will lead to the voltage at common junction
It reduces；
(2) power grid will appear violent reactive current variation, to cause electricity there are a large amount of nonlinear load in power grid
The voltage of Force system changes；
(3) access of a large amount of reactive apparatus is easy to cause falling for network voltage in weak grid, and then its in influence system
The normal operation of his equipment.
So the reactive power in electric system needs to carry out effective compensation, SVG improve the power of electric system because
Number reduces power generation end capacity, reduces line loss.In addition, issuing certain reactive power when power grid falls to maintain direct current female
Line voltage is stablized, and then improves the stability of power grid, wherein the SVG control method of cascaded H-bridges structure is simple, using modularization
Structure, capacity are easier to extend, and fault-tolerant ability is stronger, it is easier to maintenance and replacement trouble unit.Therefore, cascaded H-bridges SVG is very suitable
Conjunction is applied in high-power field.
For with weak grid, it is easy to Voltage unbalance, harmonic voltage, quick voltage fluctuation occur, then SVG function
Upper needs are quickly idle to support power grid to power grid output under the conditions of unbalanced source voltage and harmonic wave, and meet system
In other reactive apparatus demand.Traditional control system is difficult to meet it, and quickly tracking gives idle requirement, leads to system
Stability and robustness reduce.
Summary of the invention
The disclosure to solve the above-mentioned problems, proposes a kind of Cascade H bridge type SVG system based on hybrid decentralised control
And method, the disclosure can be realized active when power grid falls and Reactive Power Control, SVG exports the balance control of electric current, direct current
The stabilization and balance control of lateral capacitance voltage；With at low cost, high reliablity, the fast advantage of failure response speed.
According to some embodiments, the disclosure is adopted the following technical scheme that
A kind of Cascade H bridge type SVG system based on hybrid decentralised control, including Cascade H bridge type SVG circuit, Yi Jiyong
In at least three layers of control layer of control circuit, in which: first layer is configured as power control layer, using voltage and current double closed-loop control
System strategy, outer voltage are controlled using PI, realize the balance and stability contorting of three-phase dc side average voltage；Current inner loop makes
It is controlled with hybrid passive, realizes the rapid track and control of the balance control and current inner loop of SVG output electric current；
The second layer is configured as stable equilibrium's control of alternate DC voltage, and the method by injecting residual voltage is realized
The stable equilibrium of alternate DC voltage controls；
Third layer is configured as the Pressure and Control of phase internal module DC voltage, is controlled using ratio, each by changing
Active power in module realizes that the DC-side Voltage Stabilization in phase between H bridge module balances control.
As a kind of embodiment, the system comprises at least one master controller and multiple from controller, described first
Layer and second layer control layer are realized that the third layer from controller by respectively completing, each H bridge inverter unit configuration by master controller
Have one from controller.
It is limited as further, the master controller is believed to the modulating wave for sending each Cascade H bridge module from controller
Number and carrier synchronization signal.
It is limited as further, the data and the DC side of its own sent from controller according to master controller are electric
The Pressure and Control control algolithm for holding voltage, obtains the switching signal of four switching tubes in each H bridge module by modulation module.
It is limited as further, the switching signal generated from controller sends driving circuit to by optical fiber, leads to
The isolation amplification control switch pipe of overdrive circuit being opened and turning off, the final control for realizing Cascade H bridge type SVG.
It is limited as further, the master controller is communicated with from controller by optical fiber realization.
It is limited as further, the master controller is also connected with by PI controller and hybrid passive controller, the PI
Controller is configured as executing outer voltage closed-loop control, and the hybrid passive controller is configured as executing the electricity in first layer
Flow inner loop control.
It is limited as further, the input of the PI controller is the given value and reality of three-phase dc side average voltage
Actual value makes the difference, and exports as the reference value of current inner loop active power, the tracing control for interior circular current.
It is limited as further, the master controller forms circular communication with several H bridge inverter units of each phase and connect.
A kind of decentralized control method of Cascade H bridge type SVG system divides at least three layers and controls to Cascade H bridge type SVG system
System, wherein first layer is configured as power control layer, and using Double closed-loop of voltage and current strategy, outer voltage is controlled using PI
System realizes the balance and stability contorting of three-phase dc side average voltage；Current inner loop is controlled using hybrid passive, realizes SVG
Export the rapid track and control of the balance control and current inner loop of electric current；
The second layer is configured as stable equilibrium's control of alternate DC voltage, and the method by injecting residual voltage is realized
The stable equilibrium of alternate DC voltage controls；
Third layer is configured as the Pressure and Control of phase internal module DC voltage, is controlled using ratio, each by changing
Active power in module realizes that the DC-side Voltage Stabilization in phase between H bridge module balances control.
Compared with prior art, the disclosure has the beneficial effect that
1, the SVG system of H bridge cascade structure uses modular construction, and capacity is easier to extend, and fault-tolerant ability is stronger, it is easier to
Maintenance and replacement trouble unit；
2, first layer and second layer control use Passive Shape Control, have fast response time, the advantage of non-overshoot；
3, outer voltage uses PI controller in first layer, realizes the balance of three-phase dc side average voltage and stablizes control
System；
4, the current inner loop in first layer uses hybrid passive controller, when realizing unbalanced source voltage, cascaded H-bridges
The output current balance type of type SVG controls, and enhances the stability of system；
5, the second layer uses Passive Shape Control, realizes stable equilibrium's control of alternate DC voltage；
6, using the control structure of hybrid decentralised control, System control structures are clear, clear, readily understood；
7, using circular communication mode, reducing telecommunication optical fiber quantity, reduce system cost, communication response speed is fast,
System stability is strong.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the present embodiment cascade H bridge type SVG main circuit diagram；
Fig. 2 is the present embodiment cascade H bridge type SVG function control block diagram；
Fig. 3 is second layer voltage between phases stable equilibrium's control block diagram in the present embodiment；
Fig. 4 is the hybrid decentralized control structure figure of the present embodiment cascade H bridge type SVG；
Specific embodiment:
The disclosure is described further with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the disclosure, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this public affairs
The relative for opening each component or component structure relationship and determination, not refers in particular to either component or element in the disclosure, cannot understand
For the limitation to the disclosure.
In the disclosure, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and indicate may be a fixed connection,
It is also possible to be integrally connected or is detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the disclosure as the case may be,
It should not be understood as the limitation to the disclosure.
The present embodiment proposes a kind of Cascade H bridge type SVG system based on hybrid decentralised control, when realizing that power grid falls
Active and Reactive Power Control, SVG export the balance control of electric current, the stabilization and balance control of DC capacitor voltage.Wherein
The balance control of DC capacitor voltage includes the balance and stability contorting of three-phase dc side average voltage, alternate DC side electricity
The stable equilibrium of pressure controls, the Pressure and Control of each H bridge module DC capacitor voltage in phase.The control method response speed
Fastly, required number of fibers is few in system, at low cost.
As shown in Figure 1, the object of the present embodiment control is three-phase Cascade H bridge type SVG system, which includes with lower part
Point: (1) three phase network ea, eb, ec；(2) reactive load；(3) three-phase cascaded H-bridges, every phase have a cascade of 10 H bridge inverter units and
At each H bridge module includes 4 switch transistor Ts1, T2, T3, T4And DC bus capacitor.Cascade H bridge type SVG is logical using wye connection
It is in parallel with power grid to cross grid-connected reactor.SVG detect and issue load needed for it is idle, make power grid only to load provide need having
Function power improves the power factor and transmission of electricity quality of power grid.For Cascade H bridge type SVG because structure is simple, the features such as modularization, is extensive
Applied to high-power occasion.
Certainly, in the present embodiment, every phase H bridge module/inversion unit is ten, in other embodiments, completely can be with
The quantity of every phase H bridge module/inversion unit is increased or decreased, details are not described herein.
Fig. 2 is the Cascade H bridge type SVG function control block diagram of the present embodiment.The control target of this system includes network voltage
Active and Reactive Power Control when falling, SVG export the balance control of electric current, the stabilization and balance control of DC capacitor voltage
System.Wherein the balance control of DC capacitor voltage includes the balance and stability contorting of three-phase dc side average voltage, alternate
The stable equilibrium of DC voltage controls, the Pressure and Control of each H bridge module DC capacitor voltage in phase.
To realize the above control target, using three layers of muti-layer control tactics.First layer is power control layer, using voltage electricity
Flow double-loop control strategy.Outer voltage realizes the balance of three-phase dc side average voltage using PI controller and stablizes control
System.Current inner loop uses hybrid passive control strategy, and when realizing grid voltage sags, SVG exports balance control and the electricity of electric current
It flows the tracing control of inner ring and then realizes power control.
Outer voltage uses PI controller, and the given value of three-phase dc side average voltage makes the difference with actual value, is sent to PI
Controller.The output of PI controller is the reference value of current inner loop active power, the tracing control for interior circular current.In electric current
The design process of ring is as follows:
In Fig. 1, according to the mathematical model of Kirchhoff's second law Cascade H bridge type SVG are as follows:
ej,ij,ujRespectively network voltage, SVG output electric current and bridge arm output voltage.
When grid voltage sags, network voltage is made of positive-sequence component and negative sequence component.It indicates are as follows:
In order to realize the decoupling control of power, formula (1) is converted using PARK, obtains the mathematical modulo under dq coordinate system
Type:
So EL model is expressed as:
Wherein:
The hybrid passive controller design of Cascade H bridge type SVG when unbalanced power supply based on EL model are as follows:
Second layer control is that the stable equilibrium of alternate DC voltage controls, and control block diagram is as shown in Figure 3.This layer uses nothing
Source controller realizes that the stable equilibrium of alternate DC voltage controls by injecting the method for residual voltage.
Third layer control is phase internal module Pressure and Control strategy, using proportional controller, by changing in each module
Active power realizes that the DC-side Voltage Stabilization in phase between H bridge module balances control.
Fig. 4 is the hybrid decentralized control structure figure of Cascade H bridge type SVG.The system includes 1 master controller, and 30 from control
Device processed.
Master controller completes the control of first layer and the second layer, realizes active and Reactive Power Control when power grid falls, SVG
Export the balance control of electric current, the balance and stability contorting of three-phase dc side average voltage, the stabilization of alternate DC voltage
Balance control.And to the modulation wave signal and carrier synchronization signal for sending each Cascade H bridge module from controller.
The control of third layer is completed from controller, realizes the Pressure and Control of each H bridge module DC capacitor voltage in phase.
The Pressure and Control control algolithm of the data and the DC capacitor voltage of its own that are sent simultaneously from controller according to main control is led to
Ovennodulation module obtains the switching signal of each four switching tubes of module.Switching signal sends driving circuit to by optical fiber, leads to
The isolation amplification control switch pipe of overdrive circuit being opened and turning off, the final control for realizing Cascade H bridge type SVG.
Master controller is communicated with from controller by optical fiber realization.In order to reduce the quantity of optical fiber, save the cost is examined simultaneously
The arithmetic speed and controller resource for considering master controller, using ring type communication mode.Specifically, having 3 in every phase in A, B, C three-phase
A ring.
Likewise, number of rings is only that a kind of specific example can suitably increase or decrease number of rings in other embodiments.Phase
It answers, the H bridge/power cell combination for including in each ring can also change correspondingly.
It is illustrated by taking A phase as an example below.Include A1~A4 power cell in first ring, include in second ring A5~
A8 power cell includes A9~A10 power cell in third ring.B, C phase is similar with A.Master controller to A1, A5, A9 from
Control unit unit sends the modulation wave signal of power cell and carrier synchronization signal in each ring.A4, A8, A10 are from controller
Unit sends the DC voltage and status signal of power cell in ring to Main Control Unit.
It is specifically stated by taking first communication loop in A phase as an example are as follows: the modulation that master controller sends A1~A4 involves carrier wave
Synchronization signal is to A1；A1 sends the DC voltage of A1 and the modulating wave and carrier signal of status signal and A2~A4 to A2；A2
The DC voltage of A1 and A2 and the modulating wave and carrier signal of status signal and A3~A4 are sent to A3；A3 sends A1~A3's
The modulation of DC voltage and status signal and A4 involves carrier signal to A4；The DC voltage and state of A4 transmission A1~A4
Signal finally completes master controller and the communication from controller in ring to master controller.
To sum up, when solving grid voltage sags in weak grid, SVG exports current distortion and DC voltage imbalance control
Problem processed.In weak grid, SVG is idle by issuing, and further improves the stability of network voltage.Decentralised control tool
There are at low cost, high reliablity, the fast advantage of failure response speed.
Three layers of control strategy are proposed, first layer is controlled using PI outer voltage and hybrid passive, realizes DC voltage
Quick, the balance tracing control of the balance and stability contorting of average value, electric current.The second layer uses Passive Shape Control, alternate DC side
The stable equilibrium of voltage controls, and improves control speed.Third layer control is phase internal module Pressure and Control strategy, realizes H in phase
DC-side Voltage Stabilization between bridge module balances control.The invention proposes distributing heterarchical architectures, using circular communication
Mode reduces optical fiber usage quantity, reduces cost, improves the response speed of system.The Structure Calculation method is simple, it is intuitive,
It is illustrated, complexity is low, has very high practical value.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (10)
1. a kind of Cascade H bridge type SVG system based on hybrid decentralised control, it is characterized in that: include Cascade H bridge type SVG circuit,
And at least three layers of control layer for control circuit, in which: first layer is configured as power control layer, double using voltage and current
Closed-loop Control Strategy, outer voltage are controlled using PI, realize the balance and stability contorting of three-phase dc side average voltage；Electric current
Inner ring is controlled using hybrid passive, realizes the rapid track and control of the balance control and current inner loop of SVG output electric current；
The second layer is configured as stable equilibrium's control of alternate DC voltage, and the method by injecting residual voltage is realized alternate
The stable equilibrium of DC voltage controls；
Third layer is configured as the Pressure and Control of phase internal module DC voltage, is controlled using ratio, by changing each module
Interior active power realizes that the DC-side Voltage Stabilization in phase between H bridge module balances control.
2. a kind of Cascade H bridge type SVG system based on hybrid decentralised control as described in claim 1, it is characterized in that: described
System include at least one master controller and it is multiple from controller, the first layer and second layer control layer by master controller reality
Existing, for the third layer by respectively completing from controller, each H bridge inverter unit is configured with one from controller.
3. a kind of Cascade H bridge type SVG system based on hybrid decentralised control as claimed in claim 2, it is characterized in that: described
Master controller is to the modulation wave signal and carrier synchronization signal for sending each Cascade H bridge module from controller.
4. a kind of Cascade H bridge type SVG system based on hybrid decentralised control as claimed in claim 2, it is characterized in that: described
The Pressure and Control control algolithm of the data and the DC capacitor voltage of its own that are sent from controller according to master controller, passes through
Modulation module obtains the switching signal of four switching tubes in each H bridge module.
5. a kind of Cascade H bridge type SVG system based on hybrid decentralised control as claimed in claim 2, it is characterized in that: described
The switching signal generated from controller sends driving circuit to by optical fiber, amplifies control switch pipe by the isolation of driving circuit
Open and turn off, the final control for realizing Cascade H bridge type SVG.
6. a kind of Cascade H bridge type SVG system based on hybrid decentralised control as claimed in claim 2, it is characterized in that: described
Master controller is communicated with from controller by optical fiber realization.
7. a kind of Cascade H bridge type SVG system based on hybrid decentralised control as claimed in claim 2, it is characterized in that: described
Master controller is also connected with by PI controller and hybrid passive controller, and the PI controller is configured as executing outer voltage closed loop
Control, the hybrid passive controller are configured as executing the current inner loop control in first layer.
8. a kind of Cascade H bridge type SVG system based on hybrid decentralised control as claimed in claim 7, it is characterized in that: described
The input of PI controller is that the given value of three-phase dc side average voltage makes the difference with actual value, is exported as current inner loop wattful power
The reference value of rate, the tracing control for interior circular current.
9. a kind of Cascade H bridge type SVG system based on hybrid decentralised control as claimed in claim 12, it is characterized in that: institute
Master controller is stated to connect with several H bridge inverter units of each phase formation circular communication.
10. a kind of decentralized control method of Cascade H bridge type SVG system, it is characterized in that: points at least three layers to Cascade H bridge type SVG system
System is controlled, wherein first layer is configured as power control layer, using Double closed-loop of voltage and current strategy, outer voltage
It is controlled using PI, realizes the balance and stability contorting of three-phase dc side average voltage；Current inner loop is controlled using hybrid passive,
Realize the rapid track and control of the balance control and current inner loop of SVG output electric current；
The second layer is configured as stable equilibrium's control of alternate DC voltage, and the method by injecting residual voltage is realized alternate
The stable equilibrium of DC voltage controls；
Third layer is configured as the Pressure and Control of phase internal module DC voltage, is controlled using ratio, by changing each module
Interior active power realizes that the DC-side Voltage Stabilization in phase between H bridge module balances control.
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| CN110294171A (en) * | 2019-08-07 | 2019-10-01 | 深圳市血之缘医疗科技有限公司 | Multimachine cascades heat seal system |
| CN110336476A (en) * | 2019-07-31 | 2019-10-15 | 天津大学 | Closed loop residual voltage for cascaded H-bridges converter optimizes injection method |
| CN110460380A (en) * | 2019-08-30 | 2019-11-15 | 上海电气富士电机电气技术有限公司 | A kind of high voltage transducer power unit optical fiber ring network communication system |
| CN110890920A (en) * | 2019-11-07 | 2020-03-17 | 皖西学院 | High-voltage chain type SVG (static var generator) -based hybrid ring network communication model |
| CN111293695A (en) * | 2020-03-18 | 2020-06-16 | 山东华天电气有限公司 | Angle-type chain-type active power filter based on optical fiber serial control and control method |
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| CN110336476A (en) * | 2019-07-31 | 2019-10-15 | 天津大学 | Closed loop residual voltage for cascaded H-bridges converter optimizes injection method |
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| CN111293695A (en) * | 2020-03-18 | 2020-06-16 | 山东华天电气有限公司 | Angle-type chain-type active power filter based on optical fiber serial control and control method |
| CN111293695B (en) * | 2020-03-18 | 2021-10-26 | 山东华天电气有限公司 | Angle-type chain-type active power filter based on optical fiber serial control and control method |
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Application publication date: 20190531 |