CN114594320A - Grid-connected performance test platform and test method for energy storage power station - Google Patents
Grid-connected performance test platform and test method for energy storage power station Download PDFInfo
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- CN114594320A CN114594320A CN202210092845.2A CN202210092845A CN114594320A CN 114594320 A CN114594320 A CN 114594320A CN 202210092845 A CN202210092845 A CN 202210092845A CN 114594320 A CN114594320 A CN 114594320A
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- G—PHYSICS
- 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
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- G—PHYSICS
- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention relates to a grid-connected performance test platform and a test method of an energy storage power station, which comprises the steps of building a test platform, wherein the test platform comprises a four-quadrant converter adopting a 10-level H-bridge cascade topological structure, a power grid simulation unit taking the four-quadrant converter as an inner core and a battery simulation device of which the voltage regulation range can cover the working voltage variation range of the energy storage converter; based on the built test platform, the simulation of power grid disturbance and high/low voltage ride through is carried out, and the platform provided by the invention can be used for testing the power grid adaptability and the fault voltage ride through capability of the energy storage device.
Description
Technical Field
The invention relates to the field of power energy storage testing, in particular to a grid-connected performance testing platform and a testing method for an energy storage power station.
Background
The energy storage has good economic benefits and adjusting effects on the power supply side, the power grid side and the user side, and is rapidly developed in the last two years. On the power supply side, the system is mainly used for assisting thermal power depth peak regulation and Automatic Generation Control (AGC) frequency modulation, smoothing new energy output fluctuation and tracking a new energy power station power generation curve; the method is mainly used for participating in system peak regulation, frequency modulation and voltage regulation on the power grid side, improving the new energy consumption capability, delaying the investment of upgrading and modifying the power grid, optimizing the power flow distribution of the power grid and providing emergency power support; on the user side, the method is mainly used for peak-valley electricity price difference arbitrage operation, improving the reliability of electricity utilization, meeting diversified power supply requirements and supporting off-grid operation of the micro-grid.
The large-scale energy storage equipment grid connection has a lot of new uncertain influences on the safe and stable operation of a power system, so that when the power grid has disturbance (voltage fluctuation, frequency fluctuation or three-phase voltage unbalance) and short-time faults, the large-scale energy storage system in grid connection operation must have good power grid fault ride-through capability. From the development and the current standard analysis of the current electrochemical energy storage power station, although the project of the electrochemical energy storage power station with large scale and large capacity is developed and built more, the research on the operation characteristics of the electrochemical energy storage power station is less, especially the analysis on the abnormal and fault states of the energy storage power station in the operation process of a power grid, the safety detection of the energy storage power station and the functional verification research of the energy storage power station are insufficient, and the current commonly adopted operation test is based on equipment level, namely the operation test aiming at key equipment of the energy storage power station, such as the operation test of an energy storage battery body, an energy storage converter and an energy management system.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a grid-connected performance test platform of an energy storage power station, which comprises: the system comprises a power grid simulation unit and a battery simulation device; the input end of the power grid simulation unit is connected with a power grid, and the output end of the power grid simulation unit is connected with the battery simulation device;
the power grid simulation unit comprises a structure with a four-quadrant converter and is used for simulating the power grid fault by controlling the output of the four-quadrant converter according to the simulation experiment requirement;
the battery simulation device is used for simulating the charge-discharge characteristics of an electrochemical battery in the energy storage power station to be tested based on the power grid fault, and further testing the grid connection performance of the energy storage power station during the power grid fault;
wherein, the simulation experiment at least comprises one or more of the following: grid disturbances, high voltage ride through, and low voltage ride through.
Preferably, the four-quadrant converter comprises a three-phase multi-winding transformer and a plurality of power units, each winding of each phase of the transformer is connected with one power unit, and all the power units are connected in series.
Preferably, each of the power units includes an H-bridge structure.
Preferably, 10 power units are connected in series for each phase of the four-quadrant converter with the number of the power units connected with each phase being 10.
Preferably, the controlling the output of the four-quadrant converter comprises controlling the amplitude, the frequency and the phase of the output voltage based on controlling the on and off of each active power unit.
Preferably, the core structure further includes: the device comprises two 10kV switch cabinets, a charging resistor cabinet and a filtering cabinet;
the input end of one 10kV switch cabinet is connected with a 10kV power grid, and the output end of the switch cabinet is connected with the input end of the charging resistor cabinet; the output end of the charging resistor cabinet is connected with the input end of the four-quadrant converter, and the output end of the four-quadrant converter is connected with the output end of the filter cabinet; the output end of the filter cabinet is connected with the input end of another 10kV switch cabinet; the output end of the other 10kV switch cabinet is connected with the battery simulation device, and the battery simulation device is used for simulating a 10kV energy storage battery.
Preferably, the simulation grid unit further comprises: two 35kV switch cabinets, 35/10kV step-down transformers and 10/35kV step-up transformers;
the output end of a 35kV switch cabinet is connected with the input end of the 35/10kV step-down transformer; the output end of the 35/10kV step-down transformer is connected with the input end of the 10kV switch cabinet;
the output end of the other 10kV switch cabinet is connected with the input end of the 10/35kV boosting transformer; the output end of the 10/35kV boosting transformer is connected with the input end of another 35kV switch cabinet;
the input end of the 35kV switch cabinet is connected with a 35kV power grid; the output end of the other 35kV switch cabinet is connected with a battery simulation device, and the battery simulation device is used for simulating a 35kV energy storage battery.
Preferably, the simulation grid unit further comprises: 10/0.4kV step-down transformer;
the input end of the 10kV switch cabinet is connected with a 10kV power grid; the output end of the other 10kV switch cabinet is connected with a battery simulation device through the 10/0.4kV step-down transformer, and the battery simulation device is used for simulating a 400V energy storage battery.
Preferably, the simulation grid unit further comprises: a bypass switch cabinet;
the bypass switch cabinet is connected in parallel with the input end of the 10kV switch cabinet and the output end of the other 10kV switch cabinet.
Preferably, the four-quadrant converter is arranged in the converter container;
the top of the converter container is provided with a detachable fan top cover.
Preferably, the battery simulation apparatus includes: the circuit breaker comprises a circuit breaker, a multi-winding transformer, a three-phase rectifying unit, an inductor, a controller and a direct current circuit breaker;
the multi-winding transformer comprises a plurality of secondary windings; one end of each secondary winding is connected with the analog power grid unit through a circuit breaker, and the other end of each secondary winding is connected with the input end of the three-phase rectifying unit through an inductor; the output end of the rectifying unit is connected with a direct current bus through a direct current breaker;
the controller is connected with each three-phase rectifying unit through optical fibers and used for sending control signals to each three-phase rectifying unit.
Preferably, the rectification unit adopts a PWM rectification technology.
Preferably, each phase of the rectifying unit is connected in parallel by 2 IGBT modules.
Preferably, the IGBT module is a 300A, 1700V IGBT module.
Based on the same invention concept, the invention also provides a grid-connected performance testing method of the energy storage power station, which comprises the following steps:
simulating the tested energy storage device by using a battery simulation device in a pre-built test platform;
according to the requirements of simulation experiments, the output of a four-quadrant converter in a power grid simulation unit is controlled through the test platform so as to simulate the power grid fault;
based on the simulated power grid fault, simulating the charge-discharge characteristics of an electrochemical battery in the energy storage power station to be tested by using the battery simulation device, and further testing the grid-connected performance of the energy storage power station during the power grid fault;
verifying the grid-connected performance of the energy storage device to be tested according to the simulation test result;
the test platform is a grid-connected performance test platform of the energy storage power station; the simulation test at least comprises one or more of the following steps: and simulating power grid disturbance, high voltage ride through and low voltage ride through.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a grid-connected performance test platform and a test method of an energy storage power station, which comprises the steps of building a test platform, wherein the test platform comprises a four-quadrant converter adopting a 10-level H-bridge cascade topological structure, a power grid simulation unit taking the four-quadrant converter as an inner core and a battery simulation device of which the voltage regulation range can cover the working voltage variation range of the energy storage converter; based on the built test platform for simulating power grid disturbance and high/low voltage ride through, the platform provided by the invention can be used for testing the power grid adaptability and the fault voltage ride through capability of the energy storage device.
Drawings
FIG. 1 is a schematic structural diagram of a grid-connected performance test platform of an energy storage power station according to the present invention;
FIG. 2 is a topology of a four-quadrant converter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a topology of a simulation grid unit according to an embodiment of the present invention;
FIG. 4 is a diagram of the main circuit structure of a 10kV/3000kVA device in an embodiment of the present invention;
FIG. 5 is a structural diagram of a main circuit of a 35kV/3000kVA device in an embodiment of the invention;
FIG. 6 is a diagram of the main circuit of a 400V/3000kVA device in accordance with an embodiment of the present invention;
FIG. 7 is a topology of a battery simulator in an embodiment of the invention;
FIG. 8 is a topology of a rectifying unit in an embodiment of the present invention;
FIG. 9 is a flow chart of a method for testing grid-connection performance of an energy storage power station according to the present invention;
FIG. 10 is a simulated waveform of output voltage imbalance according to an embodiment of the present invention;
FIG. 11 is a graph illustrating the variation of the high voltage ride through command in an embodiment of the present invention;
FIG. 12 is a simulation waveform of the high voltage ride through output voltage in an embodiment of the present invention;
FIG. 13 is a graph illustrating the variation of the low voltage ride through command in an embodiment of the present invention;
FIG. 14 is a waveform of a low voltage ride through output voltage simulation in an embodiment of the present invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
Example 1:
the invention provides a grid-connected performance test platform of an energy storage power station, which comprises a power grid simulation unit which takes a four-quadrant converter as a core, and the fault voltage ride-through capability of an energy storage device is tested by controlling the output voltage amplitude, frequency and phase of the four-quadrant converter to simulate the disturbance and voltage fault of a power grid. As shown in fig. 1, the structure includes: the system comprises a power grid simulation unit and a battery simulation device; the input end of the power grid simulation unit is connected with a power grid, and the output end of the power grid simulation unit is connected with the input end of the battery simulation device; the power grid simulation unit takes a four-quadrant converter as an inner core and is used for carrying out simulation test during the power grid fault period according to the received instruction; the battery simulation device is used for simulating the charge-discharge characteristics of an electrochemical battery in the energy storage power station to be tested based on the power grid fault, and further testing the grid connection performance of the energy storage power station during the fault period; the four-quadrant converter adopts a multi-level H-bridge cascade structure.
The four-quadrant converter disclosed by the invention has the advantages that the input and the output are both 10kV, the capacity is 3000kVA, a plurality of power units are connected in series for each phase, 10 power units are adopted in the embodiment, the voltage superposition principle of the four-quadrant converter is similar to the battery pack superposition technology, the inverted output of each power unit is directly output to three 5773.5V single-phase independently controllable power supplies through series superposition, and the line voltage is 10 kV. The on and off of a plurality of IGBT switch components are controlled by sending signals through Pulse Width Modulation (PWM), and the output voltage amplitude, frequency and phase are controlled by the coordination of power electronic components such as an inductance capacitor and the like, so that the disturbance and fault voltage of a power grid can be simulated. The topology of the four-quadrant converter is shown in fig. 2.
The main loop structure of the analog power grid unit is shown in fig. 3, and mainly comprises a 35kV input switch cabinet, an 35/10kV step-down transformer, a 10kV input switch cabinet, a charging resistor cabinet, a four-quadrant converter, a filter cabinet, a 10kV output switch cabinet, a 10/35kV step-up transformer, a 35kV output switch cabinet, a bypass switch cabinet and the like. When a 10kV power grid is directly connected to the inner core of the system and is connected with a four-quadrant converter through a 10kV input switch cabinet, a charging resistor cabinet and a four-quadrant converter, and the output of the converter passes through a filter cabinet and a 10kV output switch cabinet and then is connected with a 10kV device to be tested, the topological structure is shown in figure 4. When a 35kV power grid passes through a 35kV input switch cabinet and an 35/10kV step-down transformer and then is connected to a 10kV inner core of a system, and the output of the system passes through a 10/35kV step-up transformer and a 35kV output switch cabinet and then is connected with a 35kV device to be tested, the topological structure is shown in figure 5. When a 10kV power grid is directly connected to the inner core of the system and is connected with a four-quadrant variable current through a 10kV input switch cabinet, a charging resistor cabinet and a four-quadrant variable current, the output of a converter passes through a filter cabinet and a 10kV output switch cabinet and then is connected with a 400V device to be tested through a 10/0.4kV step-down transformer, and the topological structure is as shown in FIG. 6. The simulated grid unit comprises two containers, wherein the length, width, height and size of the current transformer container (i.e. the first container) are 12m x 2.438m x 3.5m, and the weight is about 35 t; the switch cabinet and the pressure variable container (i.e. the second container) have length, width, height dimensions of 14m x 2.438m x 3.5m and a weight of about 37 t. Note that the container height is 3.5m, contains the fan top cap, and the top cap can be dismantled in the transportation, and the container height is about 3.1m after dismantling.
The battery simulator can simulate the charge and discharge characteristics of an electrochemical battery, and the single capacity is 1.5 MVA. The simulation device comprises an input circuit breaker, a multi-winding transformer, a rectification unit, a controller, a direct current circuit breaker and the like. The multi-winding transformer has 15 secondary windings, each secondary winding is connected with a rectifying unit through an inductor L, and the 15 rectifying units are connected in parallel on a direct current bus, and the topological structure is shown in FIG. 7. The topological structure of the rectifying units is shown in fig. 8, and each rectifying unit adopts a PWM rectifying technology to rectify 0.38kV ac voltage into dc voltage. The controller sends control signals to each rectifying unit in real time through the optical fibers. The three-phase input of the rectifying unit is connected with the secondary winding of the multi-winding transformer through an inductor L, each phase is formed by connecting 2 IGBT modules of 300A and 1700V in parallel, and each unit has 6 IGBT modules. The control signal adopts Pulse Width Modulation (PWM) to realize the on and off of the power electronic element, thereby realizing the rectification function.
Example 2
Based on the same inventive concept, the invention also provides a grid-connected performance testing method of the energy storage power station, as shown in fig. 9, comprising the following steps:
s1, simulating the energy storage device to be tested by using a battery simulation device in a pre-built test platform;
s2, according to the requirements of a simulation experiment, the output of a four-quadrant converter in a power grid simulation unit is controlled through the test platform so as to simulate the power grid fault;
and S3, simulating the charge-discharge characteristics of the electrochemical battery in the energy storage power station to be tested by using the battery simulation device based on the simulated power grid fault, and further testing the grid connection performance of the energy storage power station during the power grid fault.
The test platform is the grid-connected performance test platform of the energy storage power station provided by the invention; the simulation test at least comprises one or more of the following steps: and simulating power grid disturbance, high voltage ride through and low voltage ride through.
In step S2, according to the requirements of the simulation experiment, the specific steps of controlling the output of the four-quadrant converter in the power grid simulation unit through the test platform to simulate the power grid fault include:
the first step is as follows: a simulation power grid disturbance simulation test can realize simulation through output voltage unbalance. The reference difference value of each phase of the energy storage device is set respectively, and if A, C phases are set as 100% reference values, B phases are set to drop 30% reference voltage and recover within a preset time or recover when the reference voltage is set as 0. FIG. 10 shows a three-phase output voltage simulation waveform with a B-phase falling by 30% at 0.06s and a time duration of 0.1 s;
the second step is that: and outputting high voltage ride through simulation. The voltage given instruction sent by the energy management platform changes from a low value to a high value within 0.1s, the high value is reduced through two steps after lasting about 0.1s, the change curve of the given instruction is shown in fig. 11, and fig. 12 is an output voltage simulation waveform under the given condition;
the third step: and outputting the low voltage ride through simulation. The voltage given command changes from high value to zero in 0.1s, the zero value continues for about 0.1s, then increases again in a step, and slowly increases with a certain slope after about 0.6s, the change curve of the given command is shown in fig. 13, and fig. 14 is the simulation waveform of the output voltage under the given condition.
In the design of the energy storage test platform scheme provided by the invention, a power grid simulating unit with a four-quadrant converter as a core and a battery simulating device capable of simulating the charge-discharge characteristics of an electrochemical battery can be used for testing indexes such as power grid adaptability, fault voltage ride-through capability and the like of the energy storage device. According to the invention, the detection price of each energy storage power station is 160 ten thousand yuan per station, the invention brings thousands yuan detection and operation evaluation benefits every year, simultaneously can save a large amount of manpower and equipment, also greatly improves the operation safety of power equipment, and has good economic and practical values.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (15)
1. The utility model provides a performance test platform that is incorporated into power networks of energy storage power station which characterized in that includes: the system comprises a power grid simulation unit and a battery simulation device; the input end of the power grid simulation unit is connected with a power grid, and the output end of the power grid simulation unit is connected with the battery simulation device;
the power grid simulation unit comprises a structure with a four-quadrant converter and is used for simulating the power grid fault by controlling the output of the four-quadrant converter according to the simulation experiment requirement;
the battery simulation device is used for simulating the charge-discharge characteristics of an electrochemical battery in the energy storage power station to be tested based on the power grid fault, and further testing the grid connection performance of the energy storage power station during the power grid fault;
wherein, the simulation experiment at least comprises one or more of the following: grid disturbances, high voltage ride through, and low voltage ride through.
2. The test platform of claim 1, wherein the four-quadrant converter comprises a three-phase multi-winding transformer and a plurality of power cells, wherein each winding of each phase of the transformer is connected with one power cell, and wherein all the power cells are connected in series.
3. The test platform of claim 2, wherein each power cell comprises an H-bridge structure.
4. The test platform of claim 2, wherein 10 power cells are connected in series for each phase of a 10 series four quadrant converter with a number of power cells connected to each phase.
5. The test platform of claim 2, wherein the controlling the output of the four-quadrant converter comprises controlling an output voltage magnitude, frequency, and phase based on controlling the turning on and off of each active power cell.
6. The test platform of claim 2, wherein the kernel architecture further comprises: the device comprises two 10kV switch cabinets, a charging resistor cabinet and a filtering cabinet;
the input end of one 10kV switch cabinet is connected with a 10kV power grid, and the output end of the switch cabinet is connected with the input end of the charging resistor cabinet; the output end of the charging resistor cabinet is connected with the input end of the four-quadrant converter, and the output end of the four-quadrant converter is connected with the output end of the filter cabinet; the output end of the filter cabinet is connected with the input end of another 10kV switch cabinet; the output end of the other 10kV switch cabinet is connected with the battery simulation device, and the battery simulation device is used for simulating a 10kV energy storage battery.
7. The test platform of claim 6, wherein the simulated grid unit further comprises: two 35kV switch cabinets, 35/10kV step-down transformers and 10/35kV step-up transformers;
the output end of a 35kV switch cabinet is connected with the input end of the 35/10kV step-down transformer; the output end of the 35/10kV step-down transformer is connected with the input end of the 10kV switch cabinet;
the output end of the other 10kV switch cabinet is connected with the input end of the 10/35kV boosting transformer; the output end of the 10/35kV boosting transformer is connected with the input end of another 35kV switch cabinet;
the input end of the 35kV switch cabinet is connected with a 35kV power grid; the output end of the other 35kV switch cabinet is connected with a battery simulation device, and the battery simulation device is used for simulating a 35kV energy storage battery.
8. The test platform of claim 6, wherein the simulated grid unit further comprises: 10/0.4kV step-down transformer;
the input end of the 10kV switch cabinet is connected with a 10kV power grid; the output end of the other 10kV switch cabinet is connected with a battery simulation device through the 10/0.4kV step-down transformer, and the battery simulation device is used for simulating a 400V energy storage battery.
9. The test platform of any of claims 6 to 8, wherein the simulation grid unit further comprises: a bypass switch cabinet;
the bypass switch cabinet is connected in parallel with the input end of the 10kV switch cabinet and the output end of the other 10kV switch cabinet.
10. The test platform of claim 6, wherein the four quadrant converter is disposed within a converter container;
the top of the converter container is provided with a detachable fan top cover.
11. The test platform of claim 1, wherein the battery simulator comprises: the circuit breaker comprises a circuit breaker, a multi-winding transformer, a three-phase rectifying unit, an inductor, a controller and a direct current circuit breaker;
the multi-winding transformer comprises a plurality of secondary windings; one end of each secondary winding is connected with the analog power grid unit through a circuit breaker, and the other end of each secondary winding is connected with the input end of the three-phase rectifying unit through an inductor; the output end of the rectifying unit is connected with a direct current bus through a direct current breaker;
the controller is connected with each three-phase rectifying unit through optical fibers and is used for sending control signals to each three-phase rectifying unit.
12. The test platform of claim 11, wherein the rectification unit employs a PWM rectification technique.
13. The test platform of claim 11, wherein each phase of the commutation cell is connected in parallel by 2 IGBT modules.
14. The test platform of claim 13, wherein the IGBT modules are 300A, 1700V IGBT modules.
15. A grid-connected performance test method of an energy storage power station is characterized by comprising the following steps:
simulating the tested energy storage device by using a battery simulation device in a pre-built test platform;
according to the requirements of simulation experiments, the output of a four-quadrant converter in a power grid simulation unit is controlled through the test platform so as to simulate the power grid fault;
based on the simulated power grid fault, simulating the charge-discharge characteristics of an electrochemical battery in the energy storage power station to be tested by using the battery simulation device, and further testing the grid-connected performance of the energy storage power station during the power grid fault;
verifying the grid-connected performance of the energy storage device to be tested according to the simulation test result;
the test platform is the grid-connected performance test platform of the energy storage power station as claimed in any one of claims 1 to 14; the simulation test at least comprises one or more of the following steps: and simulating power grid disturbance, high voltage ride through and low voltage ride through.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116819209A (en) * | 2023-06-29 | 2023-09-29 | 广州市兆能有限公司 | Method and system for testing network-related performance of energy storage power station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116819209A (en) * | 2023-06-29 | 2023-09-29 | 广州市兆能有限公司 | Method and system for testing network-related performance of energy storage power station |
| CN116819209B (en) * | 2023-06-29 | 2023-12-26 | 广州市兆能有限公司 | Method and system for testing network-related performance of energy storage power station |
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