CN110646733A - Method and system for testing low voltage ride through characteristics of wind turbine generator and storage medium - Google Patents
Method and system for testing low voltage ride through characteristics of wind turbine generator and storage medium Download PDFInfo
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- CN110646733A CN110646733A CN201910887164.3A CN201910887164A CN110646733A CN 110646733 A CN110646733 A CN 110646733A CN 201910887164 A CN201910887164 A CN 201910887164A CN 110646733 A CN110646733 A CN 110646733A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Abstract
The invention relates to the technical field of power plant electricity, and discloses a method, a system and a storage medium for testing low voltage ride through characteristics of a wind turbine generator, wherein the method comprises the following steps: when the wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction; detecting reactive power and active power of the wind turbine generator when a voltage drop fault is simulated by a converter control system of the wind turbine generator; and the wind turbine generator converter control system obtains a test result of the low voltage ride through characteristic of the wind turbine generator according to the reactive power and the active power of the wind turbine generator. According to the embodiment of the invention, the low voltage ride through characteristic of the wind turbine generator can be tested by the original wind turbine generator converter control system in the wind power generation system, so that a low voltage ride through device does not need to be connected to a wind power plant field for testing, the testing difficulty and the testing cost are greatly reduced, and the testing convenience is improved.
Description
Technical Field
The invention relates to the technical field of power plant electricity, in particular to a method and a system for testing low voltage ride through characteristics of a wind turbine generator and a storage medium.
Background
A wind turbine is an energy conversion device that converts wind energy into electrical energy. The wind turbine generator system has good low-voltage ride-through capability, and can be ensured to continuously run in a grid-connected mode within a certain voltage drop range and time interval when the grid-connected point voltage of the wind power plant drops due to primary system faults or disturbance, so that the power generation running capability is maintained, and the power grid fluctuation is reduced.
At present, a low voltage ride through test device is generally adopted to test the low voltage ride through characteristic of a wind turbine generator; specifically, as shown in fig. 1, a low voltage ride through test device 300 is connected between an external power grid 100 and a tested wind turbine generator 200, and in a grid connection process of the tested wind turbine generator 200, a low voltage is generated on a primary system through the low voltage ride through test device 300, so as to test a low voltage ride through characteristic of the wind turbine generator. However, in the process of implementing the present invention, the present inventors found that the prior art has at least the following technical problems: when the low voltage ride through characteristic of the wind turbine generator is tested by adopting the mode, a special low voltage ride through test device is needed to generate voltage drop of a primary system, and the special low voltage ride through test device is large in size and weight, so that the transportation and installation are difficult, and the test difficulty is high and the test cost is high.
Disclosure of Invention
The invention aims to provide a method, a system and a storage medium for testing the low voltage ride through characteristic of a wind turbine generator, which can reduce the testing difficulty and the testing cost of the low voltage ride through characteristic of the wind turbine generator.
In order to solve the technical problem, the invention provides a method for testing the low voltage ride through characteristic of a wind turbine generator, which comprises the following steps:
when a wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction;
when a voltage drop fault is simulated, the wind turbine converter control system acquires reactive power and active power of the wind turbine;
and the wind turbine generator converter control system obtains a test result of the low voltage ride through characteristic of the wind turbine generator according to the reactive power and the active power of the wind turbine generator.
As a preferred scheme, the test instruction carries a fault parameter and a test parameter; the fault parameters include: the voltage drop depth and the voltage drop time, and the test parameters comprise: reactive current control coefficient, reactive current limiting value, active current limiting value and total current limiting value; then the process of the first step is carried out,
when the wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction, and specifically comprising:
when a wind turbine converter control system receives a test instruction, correspondingly setting the voltage drop depth and the voltage drop time of the measured voltage according to fault parameters carried in the test instruction;
after the wind turbine converter control system sets the voltage drop depth and the voltage drop time of the measured voltage, the reactive current control coefficient, the reactive current amplitude limit value, the active current amplitude limit value and the total current amplitude limit value of the wind turbine are correspondingly set according to the test parameters carried in the test instruction, so that the voltage drop fault is simulated.
Preferably, the voltage drop depth is 20% -90%; the voltage drop time is as follows: 0-2.0 s.
Preferably, the reactive current control coefficient is 0-0.5; the reactive current limiting value is 80% -110% of rated reactive current; the active current limiting value is 80% -110% of rated active current; the total current limiting value is 80% -110% of rated total current.
As a preferred scheme, when the wind turbine converter control system receives a test instruction, before simulating a voltage drop fault according to the test instruction, the method further comprises the following steps:
the wind turbine generator converter control system carries out self-checking;
after the self-checking is passed, the wind turbine converter control system executes the steps of: and when the wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction.
As a preferred scheme, after the self-test is passed, and before the wind turbine converter control system receives a test instruction and simulates a voltage drop fault according to the test instruction, the method further comprises the following steps:
and when the current version of the wind turbine converter control system is lower than the latest version of the wind turbine converter control system, the wind turbine converter control system is upgraded according to the latest version.
In order to solve the same technical problem, correspondingly, an embodiment of the present invention further provides a wind turbine converter control system, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the wind turbine converter control system implements the above-mentioned method for testing the low voltage ride through characteristic of the wind turbine.
In order to solve the same technical problem, an embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, and when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute the method for testing the low voltage ride through characteristic of the wind turbine generator.
Compared with the prior art, the method, the system and the storage medium for testing the low voltage ride through characteristic of the wind turbine generator, provided by the invention, have the advantages that the voltage drop fault is simulated according to the test instruction when the converter control system of the wind turbine generator receives the test instruction, the reactive power and the active power of the wind turbine generator are detected when the voltage drop fault is simulated, and the test result of the low voltage ride through characteristic of the wind turbine generator is obtained according to the reactive power and the active power of the wind turbine generator, so that the low voltage ride through characteristic of the wind turbine generator can be tested by the original converter control system of the wind turbine generator in the wind power generation system, a low voltage ride through device does not need to be connected to a wind power plant site for testing, the testing difficulty and the testing cost are greatly reduced, and the testing convenience is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art testing apparatus for low voltage ride through characteristics;
FIG. 2 is a schematic flow chart of a method for testing the low voltage ride through characteristic of the wind turbine generator in the embodiment of the invention;
FIG. 3 is a schematic voltage curve in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a reactive current curve in an embodiment of the invention;
fig. 5 is a schematic structural diagram of a wind turbine converter control system in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, a schematic flow chart of a method for testing a low voltage ride through characteristic of a wind turbine generator according to an embodiment of the present invention is shown.
The method for testing the low voltage ride through characteristic of the wind turbine generator provided by the embodiment of the invention can be executed by a wind turbine generator converter control system, and the embodiment of the invention is explained by taking the wind turbine generator converter control system as an execution main body. The wind power generation system comprises a primary system and a secondary system, wherein the wind turbine converter control system is the secondary system which is used for measuring, controlling, adjusting and protecting the primary system.
In the embodiment of the invention, the method for testing the low voltage ride through characteristic of the wind turbine generator comprises the following steps of S11-S13:
s11, when the wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction;
it should be noted that, in the grid connection process of the wind turbine generator, the wind turbine generator converter control system can measure the grid connection point voltage of the wind turbine generator in real time; moreover, a user adds a low voltage ride through simulation test function in the wind turbine converter control system in advance, and adds a low voltage ride through simulation test parameter setting function in the wind turbine converter control system; therefore, the wind turbine converter control system can simulate a voltage drop fault.
In specific implementation, in the grid-connected process of the wind turbine generator, when the converter control system of the wind turbine generator receives a test instruction, an analog signal is added to the measured grid-connected point voltage according to the test instruction, so that the grid-connected point voltage drops, and the voltage drop fault is simulated. Wherein the voltage drop fault is a three-phase fault or a two-phase fault; specifically, the three-phase fault is a grid connection point voltage drop caused by a three-phase fault of a power grid, and the two-phase fault is a grid connection point voltage drop caused by a two-phase fault of the power grid.
S12, when the voltage drop fault is simulated, the wind turbine converter control system obtains the reactive power and the active power of the wind turbine;
the wind turbine generator has a recording function for recording the reactive power and the active power of the wind turbine generator in real time; therefore, in the specific implementation process, in the process of simulating the voltage drop fault, the wind turbine converter control system can obtain the reactive power and the active power of the wind turbine from the wind turbine, so that the test convenience is further improved. Of course, a wave recorder for recording the reactive power and the active power of the wind turbine generator in real time can be arranged in the wind turbine generator converter control system, and details are not repeated here.
And S13, the wind turbine converter control system obtains a test result of the low voltage ride through characteristic of the wind turbine according to the reactive power and the active power of the wind turbine.
It should be noted that a corresponding test standard value is preset in the wind turbine converter control system, so that the wind turbine converter control system obtains a test result of the low voltage ride through characteristic of the wind turbine according to the reactive power and the active power of the wind turbine, specifically: when the reactive power and the active power of the wind turbine generator are close to corresponding test standard values, obtaining a test result with good low-voltage ride through characteristics of the wind turbine generator; and when the reactive power or the active power of the wind turbine generator is not close to the corresponding test standard value, obtaining a test result with poor low voltage ride through characteristic of the wind turbine generator.
In the embodiment of the invention, when the wind turbine converter control system receives the test instruction, the voltage drop fault is simulated according to the test instruction, and the reactive power and the active power of the wind turbine are detected when the voltage drop fault is simulated, so that the test result of the low-voltage ride-through characteristic of the wind turbine is obtained according to the reactive power and the active power of the wind turbine, and the low-voltage ride-through characteristic of the wind turbine can be tested by the original wind turbine converter control system in the wind power generation system, so that a low-voltage ride-through device does not need to be connected to a wind power plant site for testing, the test difficulty and the test cost are greatly reduced, and the test convenience is improved.
In the embodiment of the present invention, preferably, the test instruction carries a fault parameter and a test parameter; the fault parameters include: the voltage drop depth and the voltage drop time, and the test parameters comprise: reactive current control coefficient, reactive current limiting value, active current limiting value and total current limiting value; then the process of the first step is carried out,
in step S11, when the wind turbine converter control system receives the test instruction, simulating a voltage drop fault according to the test instruction, specifically including the following steps S111 to S112:
s111, when the wind turbine converter control system receives a test instruction, correspondingly setting the voltage drop depth and the voltage drop time of the measured voltage according to fault parameters carried in the test instruction;
and S112, after the wind turbine converter control system sets the voltage drop depth and the voltage drop time of the measured voltage, correspondingly setting a reactive current control coefficient, a reactive current amplitude limit value, an active current amplitude limit value and a total current amplitude limit value of the wind turbine according to the test parameters carried in the test instruction, thereby simulating the voltage drop fault.
Specifically, in step S111, when the wind turbine converter control system receives a test instruction, the wind turbine converter control system sets a voltage drop depth value of the measured grid-connected point voltage as a voltage drop depth value carried in the test instruction, and sets a voltage drop time as a voltage drop time carried in the test instruction; as shown in fig. 3, the amplitude before the grid-connected point voltage drops is 1, and the amplitude after the grid-connected point voltage drops is 0.2, that is, the set voltage drop depth is 80%; the voltage sag time is 0.625s, i.e. the fault time is 0.625 s.
In step S112, after the wind turbine converter control system sets the voltage drop depth and the voltage drop time for measuring the voltage, the wind turbine converter control system sets the reactive current control coefficient of the wind turbine to the reactive current control coefficient carried in the test instruction, sets the reactive current limit value of the wind turbine to the reactive current limit value carried in the test instruction, sets the active current limit value of the wind turbine to the active current limit value carried in the test instruction, and sets the total current limit value of the wind turbine to the total current limit value carried in the test instruction, thereby simulating the voltage drop fault. As shown in fig. 4, the solid line in the graph is the reactive current during the voltage sag.
Further, the voltage drop depth, the voltage drop time, the reactive current control coefficient, the reactive current amplitude limit value, the active current amplitude limit value and the total current amplitude limit value can be set according to actual conditions. Preferably, the voltage drop depth is 20% -90%; the voltage drop time is as follows: 0-2.0 s. The reactive current control coefficient is 0-0.5; the reactive current limiting value is 80% -110% of rated reactive current; the active current limiting value is 80% -110% of rated active current; the total current limiting value is 80% -110% of rated total current. It can be understood that, in specific implementation, a plurality of test instructions carrying different fault parameters and test parameters may be sequentially sent to the wind turbine converter control system, so that the wind turbine converter control system simulates a voltage drop fault sequentially according to the received test instructions, and then the wind turbine converter control system analyzes the detected reactive power and active power of a plurality of groups of wind turbines, thereby obtaining a test result of the low voltage ride through characteristic of the wind turbine.
In the embodiment of the present invention, preferably, before the step S11 is implemented when the wind turbine converter control system receives a test instruction and simulates a voltage drop fault according to the test instruction, the method further includes the following steps:
the wind turbine generator converter control system carries out self-checking;
after the self-checking is passed, the wind turbine converter control system executes the steps of: and when the wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction.
In the embodiment of the invention, the wind turbine converter control system is subjected to self-checking to detect whether the low voltage ride through simulation test function of the wind turbine converter control system is normal or not, and after the self-checking is passed, when the wind turbine converter control system receives a test instruction, a voltage drop fault is simulated according to the test instruction, so that the test accuracy of the wind turbine converter control system is ensured.
Further, in this embodiment, after the self-test is passed, and before the wind turbine converter control system receives a test instruction and simulates a voltage drop fault according to the test instruction, the method further includes the steps of:
and when the current version of the wind turbine converter control system is lower than the latest version of the wind turbine converter control system, the wind turbine converter control system is upgraded according to the latest version.
Specifically, after the self-checking of the wind turbine converter control system is passed, the wind turbine converter control system detects whether the current version of the wind turbine converter control system is lower than the latest version of the wind turbine converter control system; if so, the wind turbine converter control system acquires the latest version and upgrades the latest version so as to upgrade the wind turbine converter control system to the latest version; if not, executing the following steps: and when the wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction.
In the embodiment of the invention, after the self-test is passed, the wind turbine converter control system is upgraded to the latest version, and then the voltage drop fault is simulated, so that the test accuracy of the wind turbine converter control system is further ensured.
In a preferred embodiment, before simulating a voltage sag fault according to the test instruction, the method further comprises the following steps:
when a wind turbine converter control system receives a test instruction, the wind turbine converter control system detects the current active power of a wind turbine;
when the current active power of the wind turbine generator meets a preset condition, simulating a voltage drop fault according to the test instruction;
wherein the preset conditions are that:
the current active power of the wind turbine generator is larger than a preset first active power threshold value; or the current active power of the wind turbine generator is smaller than a preset second active power threshold value; the first active power threshold is greater than the second active power threshold.
It should be noted that the first active power threshold and the second active power threshold may be set according to an actual use condition; in this embodiment, preferably, the first active power threshold is 90% of the rated active power, and the second active power threshold is 40% of the rated active power.
Referring to fig. 5, another embodiment of the present invention correspondingly provides a wind turbine converter control system.
The wind turbine converter control system 1 provided by the embodiment of the invention comprises a processor 11, a memory 12 and a computer program which is stored in the memory 12 and configured to be executed by the processor 11, wherein the processor 11 implements the method for testing the low voltage ride through characteristic of the wind turbine when executing the computer program.
Illustratively, the computer program may be divided into one or more modules/units, which are stored in the memory 12 and executed by the processor 11 to accomplish the present invention. The one or more modules/units may be a series of instruction segments of a computer program capable of performing specific functions, and the instruction segments are used for describing the execution process of the computer program in the wind turbine converter control system 1.
The Processor 11 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 12 may be configured to store the computer program and/or the module, and the processor 11 implements various functions of the wind turbine converter control system 1 by running or executing the computer program and/or the module stored in the memory 12 and calling data stored in the memory 12. The memory 12 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
If the modules/units integrated with the wind turbine converter control system 1 are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, etc. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
In addition, the embodiment of the invention also provides a wind power generation system, which comprises a primary system 2 and the wind turbine converter control system 1, wherein the primary system 2 is connected with the wind turbine converter control system 1, as shown in fig. 5. The primary system is a main body of power generation, power transformation, and power transmission, and is used for supplying power.
In summary, the invention provides a method, a system and a storage medium for testing low voltage ride through characteristics of a wind turbine generator, wherein when a converter control system of the wind turbine generator receives a test instruction, a voltage drop fault is simulated according to the test instruction, and when the voltage drop fault is simulated, reactive power and active power of the wind turbine generator are detected, so as to obtain a test result of the low voltage ride through characteristics of the wind turbine generator according to the reactive power and the active power of the wind turbine generator, thereby realizing that the low voltage ride through characteristics of the wind turbine generator can be tested by an original converter control system of the wind turbine generator in a wind power generation system, so that a low voltage ride through device does not need to be connected to a wind power plant field for testing, thereby greatly reducing testing difficulty and testing cost, and improving testing convenience.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method for testing the low voltage ride through characteristic of a wind turbine generator is characterized by comprising the following steps:
when a wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction;
when a voltage drop fault is simulated, the wind turbine converter control system acquires reactive power and active power of the wind turbine;
and the wind turbine generator converter control system obtains a test result of the low voltage ride through characteristic of the wind turbine generator according to the reactive power and the active power of the wind turbine generator.
2. The method for testing the low voltage ride through characteristics of the wind turbine generator set according to claim 1, wherein the test instruction carries a fault parameter and a test parameter; the fault parameters include: the voltage drop depth and the voltage drop time, and the test parameters comprise: reactive current control coefficient, reactive current limiting value, active current limiting value and total current limiting value; then the process of the first step is carried out,
when the wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction, and specifically comprising:
when a wind turbine converter control system receives a test instruction, correspondingly setting the voltage drop depth and the voltage drop time of the measured voltage according to fault parameters carried in the test instruction;
after the wind turbine converter control system sets the voltage drop depth and the voltage drop time of the measured voltage, the reactive current control coefficient, the reactive current amplitude limit value, the active current amplitude limit value and the total current amplitude limit value of the wind turbine are correspondingly set according to the test parameters carried in the test instruction, so that the voltage drop fault is simulated.
3. The method for testing the low voltage ride through characteristic of the wind turbine generator set according to claim 2, wherein the voltage drop depth is 20% -90%; the voltage drop time is as follows: 0-2.0 s.
4. The method for testing the low voltage ride through characteristics of the wind turbine generator set according to claim 2, wherein the reactive current control coefficient is 0-0.5; the reactive current limiting value is 80% -110% of rated reactive current; the active current limiting value is 80% -110% of rated active current; the total current limiting value is 80% -110% of rated total current.
5. The method for testing the low voltage ride through characteristic of the wind turbine generator according to any one of claims 1 to 4, wherein before simulating a voltage drop fault according to the test instruction when the wind turbine generator converter control system receives the test instruction, the method further comprises the following steps:
the wind turbine generator converter control system carries out self-checking;
after the self-checking is passed, the wind turbine converter control system executes the steps of: and when the wind turbine converter control system receives a test instruction, simulating a voltage drop fault according to the test instruction.
6. The method for testing the low voltage ride through characteristic of the wind turbine generator according to claim 5, wherein after the self-test is passed and before the wind turbine generator converter control system receives a test instruction and simulates a voltage drop fault according to the test instruction, the method further comprises the following steps:
and when the current version of the wind turbine converter control system is lower than the latest version of the wind turbine converter control system, the wind turbine converter control system is upgraded according to the latest version.
7. A wind turbine converter control system comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements the method for testing low voltage ride through characteristics of a wind turbine as claimed in any one of claims 1 to 6.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored computer program, wherein when the computer program runs, the computer-readable storage medium is controlled to execute the method for testing the low voltage ride through characteristics of the wind turbine generator according to any one of claims 1 to 6.
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| CN111509776A (en) * | 2020-05-26 | 2020-08-07 | 广东电科院能源技术有限责任公司 | Low voltage ride through test voltage control method and device |
| CN112260314A (en) * | 2020-10-15 | 2021-01-22 | 山东大学 | Phase-locked synchronous stable control method and system during fault ride-through period of wind turbine generator |
| CN112487588A (en) * | 2020-11-16 | 2021-03-12 | 南方电网科学研究院有限责任公司 | Wind power plant reactive voltage regulation function test method, terminal equipment and storage medium |
| CN113203909A (en) * | 2021-05-08 | 2021-08-03 | 南方电网科学研究院有限责任公司 | Wind power plant continuous fault ride-through test method, system, computer equipment and medium |
| CN113281582A (en) * | 2021-04-20 | 2021-08-20 | 中国电力科学研究院有限公司 | Method and system for testing fault voltage ride through characteristic of variable-speed pumping storage unit |
| CN114200231A (en) * | 2021-12-03 | 2022-03-18 | 国网青海省电力公司电力科学研究院 | Test method for SVG low voltage ride through characteristic |
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