CN115473263A - Voltage source characteristic testing device of network-structured type converter and testing and evaluating method thereof - Google Patents

Voltage source characteristic testing device of network-structured type converter and testing and evaluating method thereof Download PDF

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CN115473263A
CN115473263A CN202211023635.4A CN202211023635A CN115473263A CN 115473263 A CN115473263 A CN 115473263A CN 202211023635 A CN202211023635 A CN 202211023635A CN 115473263 A CN115473263 A CN 115473263A
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grid
gfc
type converter
load
voltage
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陈烁
唐彬伟
郭江涛
曾瑞斌
黄丽玲
张瑞
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MingYang Smart Energy Group Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

The invention discloses a device for testing the voltage source characteristics of a network-structured converter and a testing and evaluating method thereof, wherein the device comprises: variable power frequency Load and control switch S thereof load The variable power frequency Load is used for simulating loads with different characteristics, and the variable power frequency Load controls a switch S load The Load controller is used for controlling the variable power frequency Load to be connected to or disconnected from a network; grid simulation and control switch S thereof Grid The Grid is used for providing stable voltage for the variable power frequency Load, simulating fault and controlling a switch S Grid The system is used for controlling the state of the Grid of the simulation power Grid; the data acquisition device is used for acquiring instantaneous values (v) of three-phase voltage at the GFC side of the network type converter GFC,a 、v GFC,b 、v GFC,c ). The invention can verify the control performance and guarantee the capability of stable operation of the system aiming at the voltage source characteristic of the network-forming type converter, and defines the control performance index of the voltage source characteristic of the network-forming type converter, the structure of the device is simple and reliable, the operation is convenient, and the test time and the cost can be greatly saved.

Description

Voltage source characteristic testing device of network-structured type converter and testing and evaluating method thereof
Technical Field
The invention relates to the technical field of testing of a network-forming type converter, in particular to a device for testing the voltage source characteristic of the network-forming type converter and a testing and evaluating method thereof, which are suitable for a wind generating set adopting a full-power converter for grid connection.
Background
With the development of renewable energy power generation, the proportion of power electronic equipment in a power grid is gradually increased, and the whole power grid tends to have reduced inertia, weakened strength and the like. In order to ensure the stable and safe operation of the power grid, the power electronic converter needs to realize and even replace the functions and actions of the traditional synchronous motor, and the network-forming converter is generated and gradually becomes the mainstream development trend. However, the exact definition and normalization of the dynamic characteristics of the network-type converter, especially the voltage source characteristics, is not agreed upon. Therefore, it is necessary to have a standardized set of testing methods to define the control performance index to evaluate the dynamic stability of the voltage source characteristics.
Disclosure of Invention
The first objective of the present invention is to overcome the drawbacks and disadvantages of the prior art, and to provide a device for testing voltage source characteristics of a network-type converter, which can verify the control performance and ensure the capability of stable operation of a system for the voltage source characteristics of the network-type converter, and the device has a simple and reliable structure, is convenient to operate, and greatly saves the testing time and cost.
The second objective of the present invention is to provide a testing method for a voltage source characteristic testing apparatus of a network-type converter.
The third objective of the present invention is to provide an evaluation method for a voltage source characteristic testing apparatus of a network-type converter.
The first purpose of the invention is realized by the following technical scheme: a network type converter voltage source characteristic testing device comprises:
variable power frequency Load and control switch S thereof load The variable power frequency Load is used for simulating loads with different characteristics, and the variable power frequency Load controls a switch S load The Load controller is used for controlling the variable power frequency Load to be connected to or disconnected from a network;
grid simulation and control switch S thereof Grid The Grid is used for providing stable voltage for the variable power frequency Load and simulating faults, and the Grid controls a switch S Grid The system is used for controlling the state of the Grid of the simulation power Grid;
a data acquisition device for acquiring instantaneous value (v) of three-phase voltage at GFC side of the grid type converter GFC,a 、v GFC,b 、v GFC,c )；
Wherein, the GFC is provided with a grid-connected switch S for controlling the grid-connected/off state of the GFC GFC The Grid-type converter GFC and the variable power frequency Load are connected in parallel through cables and then are connected in series with a Grid of a simulation power Grid through cables, the Grid-type converter GFC can provide voltage support for the variable power frequency Load when a power Grid fails due to the voltage source characteristics of the Grid-type converter GFC, and the data acquisition device is connected to a signal acquisition point on the GFC side of the Grid-type converter through a signal line.
Preferably, the characteristic Load simulated by the variable power frequency Load is one of a pure resistive Load, an inductive Load and a capacitive Load or a combination of any two or three of the pure resistive Load, the inductive Load and the capacitive Load.
Preferably, the capacity of the variable power frequency Load is 0.25, 0.5, 0.75 or 1 time of the rated capacity of the GFC of the network type converter.
Preferably, the sampling frequency of the data acquisition device is not less than 4kHz.
The second purpose of the invention is realized by the following technical scheme: the testing method of the voltage source characteristic testing device of the network-structured type converter comprises the following steps:
1) Setting the characteristics and the capacity of the variable power frequency Load;
2) Close S in sequence Grid 、S load 、S GFC Connecting the variable power frequency Load and the GFCSimulating Grid of a power Grid;
3) Starting a data acquisition device to record data waves;
4) Stepping up the power setpoint P of a grid-type converter GFC in specific steps GFC,set Up to the power set point P GFC,set Rated power of the grid type converter GFC is achieved, and the grid type converter GFC is at rated power set point P n Stable operation, at the same time, the grid control switch S is switched off Grid And recording the time as t step ；
5) Setting power set point P of grid type converter GFC GFC,set =0, after the GFC of the network type converter stops running completely, the data acquisition device is stopped, and the S is cut off in sequence load 、S GFC ；
6) Analyzing data;
7) Judging whether the characteristics of Load simulation of the variable power frequency Load and the capacity combination of the Load simulation are completely tested or not; if the test is finished, and if the test is not finished, the steps 1) to 6) are repeated.
Preferably, in step 4), the specific step size is 0.25S N In which S is N The rated apparent power of the GFC of the network type converter.
The third purpose of the invention is realized by the following technical scheme: the method is used for judging the characteristic parameter of the voltage source characteristic of the network type converter, namely the voltage response time t VR It is defined as the time t of the last entering of the effective value of the fundamental positive sequence voltage into the error band of the new operating point set And t step If t is the difference of set And t step If the difference value is within the threshold value, the condition that the voltage source characteristic of the network-structured type converter meets the requirement can be judged; wherein, t step Power set point P for a net type converter GFC GFC,set Rated power of the grid type converter GFC is achieved, and the grid type converter GFC is at a rated power set point P n Disconnecting the grid control switch S after stable operation Grid The time of day.
Preferably, the evaluation method of the voltage source characteristic test device of the network-structured type converter and the specific processComprises the following steps: firstly, according to a three-phase voltage instantaneous value (v) of GFC side of the network type converter collected by a data collecting device GFC ,a、v GFC ,b、v GFC And c), carrying out Fourier transform on the data, wherein the calculation mode is as follows;
calculating Fourier coefficients of fundamental wave components in one fundamental wave period:
Figure BDA0003815019860000041
Figure BDA0003815019860000042
in the formula: f. of 1 Is the fundamental frequency; v. of j,cos The cosine component of the fundamental wave voltage of a certain phase in the three phases; v. of j,sin The sine component of a fundamental wave voltage of a certain phase in three phases; v. of GFC，j The instantaneous value of a certain phase voltage in the three phases; j = a, b, c; t is the actual time series; t is the fundamental wave period;
calculating the fundamental positive sequence voltage component in the following way:
Figure BDA0003815019860000043
Figure BDA0003815019860000044
in the formula: v. of 1+,cos Is the cosine component of the fundamental positive sequence voltage; v. of 1+,sin Is a sinusoidal component of the fundamental positive sequence voltage;
then, according to v 1+,cos And v 1+,sin And are combined with
Figure BDA0003815019860000045
Calculating the effective value V of the positive sequence voltage of the fundamental wave pos According to V pos Drawing the error band at the steady state value of the new operating point, and judging t set The value of (a), wherein,t set after the determination, the positive sequence voltage values of the following time points are all in the error band at the moment, and finally, the positive sequence voltage values are determined according to t VR ＝t set -t step Calculate t VR The value of (c).
Preferably, the error band has an error of ± 5%.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention can effectively verify the control performance of the network-forming type converter and ensure the capability of stable operation of the system aiming at the voltage source characteristic of the network-forming type converter, and defines the control performance index of the voltage source characteristic of the network-forming type converter.
2. The device has simple and reliable structure and convenient operation, and can greatly save the test time and cost.
3. The invention provides a systematic idea for testing and evaluating the network-forming type converter, is beneficial to the rapid development of the network-forming type converter and even the network-forming type new energy power generation technology, and can improve the power grid friendliness of new energy power generation mainly based on power electronic equipment and enhance the stability of a power grid system.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
FIG. 2 is a flow chart of the testing of the apparatus of the present invention.
FIG. 3 is a schematic diagram illustrating determination of response time of the voltage source characteristic of the network-type converter.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
As shown in fig. 1, the present embodiment provides a device for testing voltage source characteristics of a network type converter, including:
variable power frequency Load and control switch S thereof load The variable power frequency Load is used for simulating loads with different characteristics, and the variable power frequency Load controls a switch S load The system is used for controlling the variable power frequency Load to be connected to the grid or disconnected from the grid;
grid simulation and control switch S thereof Grid The Grid of the simulation power Grid is used for providing stable electricity for the variable power frequency LoadPressing, and simulating a fault, which controls the switch S Grid The system is used for controlling the state of the Grid of the simulation power Grid;
the data acquisition device is used for acquiring instantaneous values (v) of three-phase voltage at the GFC side of the network type converter GFC,a 、v GFC,b 、v GFC,c )；
The GFC is provided with a grid-connected switch S for controlling the grid-connected/off-grid state of the GFC GFC The Grid-type converter GFC and the variable power frequency Load are connected in parallel through cables and then are connected in series with a Grid of a simulation power Grid through cables, the Grid-type converter GFC can provide voltage support for the variable power frequency Load when a power Grid fails due to the voltage source characteristics of the Grid-type converter GFC, and the data acquisition device is connected to a signal acquisition point on the GFC side of the Grid-type converter through a signal line.
Preferably, the characteristic Load simulated by the variable power frequency Load is one of a pure resistive Load, an inductive Load and a capacitive Load or a combination of any two or three of the pure resistive Load, the inductive Load and the capacitive Load.
Preferably, the capacity of the variable power frequency Load is 0.25, 0.5, 0.75 or 1 times of the rated capacity of the GFC.
Preferably, the sampling frequency of the data acquisition device is not less than 4kHz.
As shown in fig. 2, the present embodiment provides a testing method of the voltage source characteristic testing apparatus of the network type converter, including the following steps:
1) Setting the characteristic and the capacity of a variable power frequency Load;
2) Close S in turn Grid 、S load 、S GFC Accessing a variable power frequency Load and a GFC (Grid-connected converter) into a simulated power Grid;
3) Starting a data acquisition device to record data waves;
4) At 0.25S N Step-up of power setpoint P of grid-type converter GFC (rated apparent power of grid-type converter) GFC,set Up to the power set point P GFC,set Rated power of the grid type converter GFC is achieved, and the grid type converter GFC is at rated power set point P n The operation is stable, and the operation is stable,at this time, the grid control switch S is turned off Grid And recording the time as t step ；
5) Setting power set point P of grid type converter GFC GFC,set =0, after the GFC of the network-building type converter completely stops running, the data acquisition device is stopped, and S is cut off in sequence load 、S GFC ；
6) Analyzing data;
7) Judging whether all the characteristics of Load simulation of the variable power frequency Load and capacity combinations (12 combination modes in total including 3 characteristics and 4 capacity grades) of the Load simulation are tested; if complete, the test is ended, and if not, the steps 1) to 6) are repeated.
Further, the present embodiment provides an evaluation method of the voltage source characteristic testing apparatus for a mesh type converter, which is used for determining a characteristic parameter of the voltage source characteristic of the mesh type converter, i.e. a voltage response time t VR It is defined as the time t when the effective value of the fundamental positive sequence voltage enters the error band of the new operation point for the last time (error is + -5 percent) set And t step (t step Power set point P for GFC of grid-type converter GFC,set Rated power of the grid type converter GFC is achieved, and the grid type converter GFC is at rated power set point P n Disconnecting the grid control switch S after stable operation Grid Time of (d)), if t) set And t step The difference value is within the threshold value, namely the network type converter voltage source characteristic can be judged to meet the requirement, and the specific operation is as follows:
firstly, according to a three-phase voltage instantaneous value (v) of GFC side of the network type converter collected by a data collecting device GFC,a 、v GFC,b 、v GFC,c ) Fourier transform is carried out on the data, and the calculation mode is as follows;
calculating Fourier coefficients of fundamental wave components in one fundamental wave period:
Figure BDA0003815019860000071
Figure BDA0003815019860000072
in the formula: f. of 1 Is the fundamental frequency; v. of j,cos The cosine component of the fundamental wave voltage of a certain phase in the three phases; v. of j,sin A sinusoidal component of a fundamental wave voltage of one of the three phases; v. of GFC，j The instantaneous value of a certain phase voltage in the three phases; j = a, b, c; t is the actual time series; t is the fundamental period;
calculating the fundamental positive sequence voltage component in the following way:
Figure BDA0003815019860000073
Figure BDA0003815019860000074
in the formula: v. of 1+,cos Is the cosine component of the fundamental positive sequence voltage; v. of 1+,sin Is a sinusoidal component of the fundamental positive sequence voltage;
then, according to v 1+,cos And v 1+,sin And are combined with
Figure BDA0003815019860000075
Calculating the effective value V of the positive sequence voltage of the fundamental wave pos According to V pos Drawing an error band at the steady state value of the new operating point, and judging t according to the judgment mode of figure 3 set A value of (b), wherein t set After the determination, the subsequent positive sequence voltage values at the moment are all in the error band, and finally, according to t VR ＝t set -t step Calculate t VR The value of (c).
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (9)

1. Network-based converter voltage source characteristic testing device, characterized by, include:
variable power frequency Load and control switch S thereof load The variable power frequency Load is used for simulating loads with different characteristics, and the variable power frequency Load controls a switch S load The system is used for controlling the variable power frequency Load to be connected to the grid or disconnected from the grid;
grid simulation and control switch S thereof Grid The Grid is used for providing stable voltage for the variable power frequency Load, simulating fault and controlling a switch S Grid The system is used for controlling the state of the Grid of the simulation power Grid;
the data acquisition device is used for acquiring instantaneous values (v) of three-phase voltage at the GFC side of the network type converter GFC,a 、v GFC,b 、v GFC,c )；
Wherein, the GFC is provided with a grid-connected switch S for controlling the grid-connected/off state of the GFC GFC The Grid-type converter GFC and the variable power frequency Load are connected in parallel through cables and then are connected in series with a Grid of a simulation power Grid through cables, the Grid-type converter GFC can provide voltage support for the variable power frequency Load when a power Grid fails due to the voltage source characteristics of the Grid-type converter GFC, and the data acquisition device is connected to a signal acquisition point on the GFC side of the Grid-type converter through a signal line.
2. The voltage source characteristic testing device of the grid type converter according to claim 1, wherein: the characteristic Load simulated by the variable power frequency Load is one of a pure resistive Load, an inductive Load and a capacitive Load or a combination of any two or three of the pure resistive Load, the inductive Load and the capacitive Load.
3. The voltage source characteristic testing device of the grid type converter according to claim 1, wherein: the capacity of the variable power frequency Load is 0.25, 0.5, 0.75 or 1 time of the rated capacity of the GFC of the network type converter.
4. The voltage source characteristic testing device of the grid type converter according to claim 1, wherein: the sampling frequency of the data acquisition device is not less than 4kHz.
5. The method for testing the voltage source characteristic testing device of the network type converter as claimed in any one of claims 1 to 4, characterized by comprising the following steps:
1) Setting the characteristic and the capacity of a variable power frequency Load;
2) Close S in sequence Grid 、S load 、S GFC Accessing a variable power frequency Load and a GFC (Grid-connected converter) into a Grid of the simulation power Grid;
3) Starting a data acquisition device to record data waves;
4) Stepping up the power set point P of the GFC of a grid-type converter in specific steps GFC,set Up to the power set point P GFC,set Rated power of the grid type converter GFC is achieved, and the grid type converter GFC is at rated power set point P n Stable operation, at the same time, the grid control switch S is switched off Grid And recording the time as t step ；
5) Setting power set point P of grid type converter GFC GFC,set =0, after the GFC of the network-building type converter completely stops running, the data acquisition device is stopped, and S is cut off in sequence load 、S GFC ；
6) Analyzing data;
7) Judging whether all the characteristics and capacity combinations of the Load simulation of the variable power frequency Load are tested; if the test is finished, and if the test is not finished, the steps 1) to 6) are repeated.
6. The method for testing the voltage source characteristic testing device of the network-type converter according to claim 5, wherein in the step 4), the specific step size is 0.25S N In which S is N The rated apparent power of the GFC of the network type converter.
7. The method for evaluating the voltage source characteristic testing device of the network type converter as claimed in any one of claims 1 to 4, wherein the method is used for determining the voltage source characteristic of the network type converterCharacteristic parameter of the characteristic, i.e. voltage response time t VR Defined as the time t when the effective value of the fundamental positive sequence voltage enters the error band of the new operation point for the last time set And t step If t is a difference of set And t step If the difference value is within the threshold value, the condition that the voltage source characteristic of the network-structured type converter meets the requirement can be judged; wherein, t step Power set point P for GFC of grid-type converter GFC,set Rated power of the grid type converter GFC is achieved, and the grid type converter GFC is at a rated power set point P n Disconnecting the grid control switch S after stable operation Grid Time of day (c).
8. The method for evaluating the voltage source characteristic test device of the grid type converter according to claim 7, wherein first, the instantaneous value (v) of the three-phase voltage on the GFC side of the grid type converter is collected by the data collecting device GFC,a 、v GFC,b 、v GFC,c ) Fourier transform is carried out on the data, and the calculation mode is as follows;
calculating Fourier coefficients of fundamental wave components in one fundamental wave period:
Figure FDA0003815019850000031
Figure FDA0003815019850000032
in the formula: f. of 1 Is the fundamental frequency; v. of j,cos The cosine component of the fundamental wave voltage of a certain phase in the three phases; v. of j,sin The sine component of a fundamental wave voltage of a certain phase in three phases; v. of GFC，j The instantaneous value of a certain phase voltage in the three phases; j = a, b, c; t is the actual time series; t is the fundamental period;
calculating the fundamental positive sequence voltage component in the following way:
Figure FDA0003815019850000033
Figure FDA0003815019850000034
in the formula: v. of 1+,cos Is the cosine component of the fundamental positive sequence voltage; v. of 1+,sin Is the sinusoidal component of the fundamental positive sequence voltage;
then, according to v 1+,cos And v 1+,sin And are combined with
Figure FDA0003815019850000035
Calculating the effective value V of the positive sequence voltage of the fundamental wave pos According to V pos Drawing the error band at the steady state value of the new operating point, and judging t set A value of (a), wherein t set After the determination, the positive sequence voltage values of the following time points are all in the error band at the moment, and finally, the positive sequence voltage values are determined according to t VR ＝t set -t step Calculate t VR The value of (c).
9. The method according to claim 8, wherein the error band has an error of ± 5%.
CN202211023635.4A 2022-08-25 2022-08-25 Voltage source characteristic testing device of network-structured type converter and testing and evaluating method thereof Pending CN115473263A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117269654A (en) * 2023-11-17 2023-12-22 中国电力科学研究院有限公司 Method and device for testing and evaluating phase jump active response characteristics of network-structured converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117269654A (en) * 2023-11-17 2023-12-22 中国电力科学研究院有限公司 Method and device for testing and evaluating phase jump active response characteristics of network-structured converter
CN117269654B (en) * 2023-11-17 2024-03-15 中国电力科学研究院有限公司 Method and device for testing and evaluating phase jump active response characteristics of network-structured converter

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