Modular energy storage system test platform and method

Abstract

The invention provides a modularized energy storage system testing platform and method, belongs to the field of energy storage system testing, and solves the problems of poor testing compatibility, low automation degree and the like of an existing energy storage system. The platform comprises a test console, a double-dragging module A, a double-dragging module B, a double-dragging module C and a countercurrent device which are respectively connected with a control bus and a communication bus, the method comprises the following steps: importing the specification of a to-be-tested energy storage system; electrical monitoring comprehensive decision making; recommending the to-be-tested energy storage system tool configuration optimal scheme; judging whether to test according to the recommended configuration scheme; judging whether the system is a string type energy storage system; testing step production of the string type energy storage system; testing step production of the centralized energy storage system; detecting and switching; automatic testing; judging whether the test passes or not; and judging whether the test tool is abnormal or not. According to the invention, compatibility in-loop testing of the string type energy storage system or the centralized type energy storage system can be automatically carried out on different battery configurations, PCS configurations and transformation module configurations.

Description

Technical Field

[0001] The invention belongs to the technical field of energy storage system testing, and relates to a modular energy storage system testing platform, in particular to a modular energy storage system testing method. Background Art

[0002] Energy storage is an important technology and basic equipment supporting the new power system. It is of great significance to promote green energy transformation, respond to extreme events, ensure energy security, and promote high-quality energy development.

[0003] A general energy storage system is composed of a large number of battery PACKs, which are connected in series to form RACKs, which are directly inverted and boosted by the PCS, or multiple RACKs on the DC side are connected in parallel and then fed into the PCS for inverting and boosting.

[0004] The current energy storage system has many types of battery specifications, various electrical structures, and high system complexity. The existing energy storage system pre-shipment testing can only be done for energy storage systems of specific specifications, and most of them rely on manual system charging and discharging tests, which cannot meet the diverse testing requirements of various energy storage system specifications. As a result, the energy storage system arrives at the project site with functional defects and safety hazards, which increases the huge cost waste of maintenance investment at the project site later.

[0005] Therefore, we propose a modular energy storage system testing platform and method. Summary of the invention

[0006] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a modular energy storage system testing platform and method. The technical problem to be solved by the invention is: how to realize compatible in-loop testing of different battery configurations, different PCS configurations, different transformer module configurations, and testing of string energy storage systems and centralized energy storage systems; at the same time, realize a full set of automated testing, save costs, and adjust reverse overload protection.

[0007] The purpose of the present invention can be achieved by the following technical solutions: A modular energy storage system test platform and method, comprising a test console, a pair of towing modules A, a pair of towing modules B, a pair of towing modules C and a reverse flow device, wherein the pair of towing modules C is a backup module, and when the system of the pair of towing modules A or the pair of towing modules B fails to operate due to an abnormality, the pair of towing modules C is restarted; the test console controls one of the pair of towing modules A and the pair of towing modules B to charge, and the other pair of towing modules discharges, the reverse flow device is connected between the test console and a power grid, and the reverse flow device is connected between the pair of towing modules A, the pair of towing modules B and the pair of towing modules C and the power grid; the test console, the pair of towing modules A, the pair of towing modules B and the pair of towing modules C are respectively connected to a control bus and a communication bus; and also includes an energy storage battery to be tested and a test tooling.

[0008] The structures of the pair-drag module A, the pair-drag module B and the pair-drag module C are the same. The pair-drag module includes a plurality of cross-connecting modules connected to the U, V, and W three-phase electrical phases and a plurality of transformer modules connected in series to the U, V, and W three-phase electrical phases. The transformer modules are numbered P1, P2, P3, ..., Pn, and the cross-connecting modules are numbered 1, 2, 3, ..., n, and the number of the cross-connecting modules is the same as that of the transformer modules. A plurality of electric knife switches 1 are provided on the main line of the U, V, and W three-phase electricity. The electric knife switches 1 are numbered K21, K22, K23, ..., K2 (n-1) in sequence. The electric knife switches are located in front of the corresponding cross-connecting module and the transformer module. An electric knife switch 2 is provided on the branch line of the three-phase electricity of each transformer module. The electric knife switches 2 are numbered K11, K12, K13, ..., K1n in sequence. The plurality of electric knife switches 1 and the plurality of electric knife switches 2 are all connected to the communication bus with the plurality of cross-connecting modules.

[0009] The crossover module includes several PCS submodules and several RACK submodules connected to the three-phase electrical phases U, V, and W. The number of the RACK submodules is the same as that of the PCS submodules. The RACK submodules and the PCS submodules are numbered 1, 2, 3, ..., m. Several RACK submodules are connected to the corresponding PCS submodules. The PCS submodules are connected to the communication bus. The positive poles of several RACK submodules and the negative poles of several RACK submodules are connected. An electric knife switch 3 is provided between two connected RACK submodules. The electric switch three are numbered K31, K32, K33, ..., K3 (m-1) in sequence. The electric switch three is connected to the control bus, and the electric switch three K3i (i=1~m) inside the cross-connect module is disconnected. Each PCS sub-module and RACK sub-module is installed according to the test requirements, and the maximum power of the installed RACK sub-module is less than the maximum power of the PCS module on the same circuit. The specifications of RACKi (i=1~m) can be different to support mixed testing, and the specifications of PCSi (i=1~m) can be different to support mixed testing.

[0010] The PCS submodule inside the cross-connect module supports a maximum of m DC-side parallel machines, so the maximum power supported by each cross-connect module is m*P pcs ; If the power of the energy storage module in parallel with the DC side to be tested is P 储能单元 <=m*P pcs , the cross-connection module is internally configured with x PCS DC side parallel machines added to the test platform, that is, x switches are closed, where x is P 储能单元 / P pcsIf the value is rounded to an integer, the test console controls K31 to K3x to close, and the battery cluster RACK to be tested is installed in the first x RACK submodule positions, and the remaining RACK positions in the crossover module are vacant and not installed; If the power of the energy storage module in parallel with the DC side to be tested is P 储能单元 >m*P pcs , that is, P 余 =P 储能单元 -m*P pcs ,Assign the extra battery clusters to be tested to the next crossover module and follow the above steps.

[0011] The maximum power supported by the drag module is n*m*P pcs , if the maximum power of the energy storage system to be tested is P 储能系统 , then set y three-phase AC side parallel machines of the drag module to join the test platform, where y is P 储能系统 / P 储能单元 If the test console controls K11~K1y to be closed and K21~K2y to be disconnected, the active power P1~Py of the transformer modules 1~y will reach at least P 储能单元 , that is, P 组串p =P 储能单元 .

[0012] The RACK submodule is composed of a number of battery PACKs connected in series. In the same batch test, the specifications of the battery clusters RACK to be tested are the same, and the specifications of the PCS are the same.

[0013] The maximum supported test power P of the cross-combination module 交并j = , the minimum test power is P 交并j = .

[0014] The pair-drag module supports at least one cross-module test, that is, the test console controls K21 to be disconnected and K11 to be closed, that is, the minimum centralized energy storage system tests the power module P 储能系统min = ; The maximum number of parallel tests supported for the drag module is n. That is, the test console controls K21~K2n-1 to be closed, K11~K1n-1 to be disconnected, and K1n to be closed. That is, the maximum centralized energy storage system tests the power module P 储能系统max = .

[0015] The maximum power specification of the transformer module is calculated according to the maximum power of the parallel module to be tested. 集中q = , where q is any qth transformer module from 1 to n.

[0016] A modular energy storage system testing method includes the following testing steps: Step 1: Import the specifications of the energy storage system to be tested: According to the power and parameters to be tested, PCSs of various power types can be tested and the specifications of the energy storage system to be tested can be imported; Step 2: Comprehensive decision-making for electrical monitoring: By real-time monitoring of electrical parameters (such as current, voltage, power factor, etc.) and the operating status of equipment (such as the opening and closing status of circuit breakers and contactors), abnormal conditions in the system can be discovered in time to prevent potential power failures, optimize load distribution, reduce power loss, and improve the overall reliability and energy efficiency of the power supply system. Detailed data analysis and prediction results are provided to provide strong decision-making support for management; Step 3: Recommend the optimal solution for the tooling configuration of the energy storage system to be tested: Configure the transformer module power. The transformer module power q (q is any transformer module with q between 1 and n) in the modular test platform is calculated according to P 集中q Configuration, the maximum supported test power P of the crossover module j 交并j = , the maximum centralized energy storage system test power module P 储能系统max = , the maximum power calculation of the parallel module to be tested, P 集中q = , and the supporting primary topology; Step 4: Determine whether the test is performed according to the recommended configuration scheme: if yes, self-identify the electrical control category of the energy storage system, and proceed to step 5; if no, adjust the specifications of the energy storage system to be tested or adjust the tooling test parameters, and then proceed to step 1 and repeat the operation; Step 5, determine whether it is a string energy storage system: if yes, proceed to step 6 of the string energy storage system test process; if no, proceed to step 7 of the centralized energy storage system test process; Step 6, production of the string energy storage system test process: one pair of drag modules is the energy storage system power, and the other pair of drag modules is configured. The test console starts the RACK submodule and PCS submodule under the configured two pair of drag modules, and controls one pair of drag modules to charge and the other pair of drag modules to discharge. The charging and discharging of the pair of drag modules are carried out in reverse. The power and temperature curve of the PCS submodule are adjusted according to the state of the RACK submodule, and the reverse flow device is simultaneously guaranteed not to discharge to the grid, and the power of the monitoring and regulating transformer module is not overloaded, otherwise the PCS submodule is controlled to reduce the power operation, and the configuration and control protection of the string energy storage system test platform are realized, and step 8 is performed; Step 7, centralized energy storage system test process production: RACK submodule, PCS submodule and transformer are configured according to the rules, then the test console can adjust K11, K12 and K13 according to the energy storage power to be tested at this time, so that the test platform meets the current power and parameters to be tested; on this basis, during the test process, the test console controls in the manner of step 3 and proceeds to step 8; Step 8: Detection and switching: Detect the integrity of the tooling to be tested and control the switching of the actuator of the tooling to be tested; Step 9, automated testing: start automated testing according to the test steps; Step 10: Determine whether the test is passed. If it is passed, the product can be shipped. If it is not passed, a test exception report is made and the process goes to step 11. Step 11, determine whether the test tooling is abnormal: if so, perform test tooling abnormality diagnosis, go to step 8, and re-operate; if not, perform system rectification, re-test, go to step 9, and re-operate.

[0017] Compared with the existing technology, the modular energy storage system testing platform and method have the following advantages: The test console is used to select the configuration; the modular test platform can test different battery configurations, different PCS configurations, different transformer module configurations, and compatible in-loop tests of string energy storage systems and centralized energy storage systems; It can automatically configure the test fixtures of corresponding specifications according to the specifications and characteristics of the energy storage system to be tested. During the test process, the full set of test items is completed automatically while ensuring the electrical safety in the factory, realizing automation, saving costs and avoiding problems and risks after leaving the factory. Supports automatic configuration of test platforms for mixed tests of RACK, PCS and other specifications; The energy storage system can be tested in the loop and the reverse overload protection can be adjusted during the control test so that power will not flow back to the grid and cause a fine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the energy storage system test platform of the present invention.

[0019] Figure 2 It is a schematic diagram of the internal topology of the pair-drag module of the energy storage system test platform of the present invention.

[0020] Figure 3 It is a schematic diagram of the internal topology of the cross-connect module of the energy storage system test platform of the present invention.

[0021] Figure 4 It is a schematic diagram of the internal topology of the PCS module of the energy storage system test platform of the present invention.

[0022] Figure 5 It is a flowchart of the energy storage system testing method of the present invention. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] like Figure 1 to Figure 4 As shown, the modular energy storage system test platform includes a test console, a pair of tow modules A, a pair of tow modules B, a pair of tow modules C and a countercurrent device. The pair of tow modules C is a backup module. When the system of the pair of tow modules A or the pair of tow modules B fails to operate due to an abnormality, the pair of tow modules C is started; the test console controls one of the pair of tow modules A and the pair of tow modules B to charge, and the other pair of tow modules discharges, the countercurrent device is connected between the test console and the power grid, and the countercurrent device is connected between the pair of tow modules A, the pair of tow modules B and the pair of tow modules C and the power grid; the test console, the pair of tow modules A, the pair of tow modules B and the pair of tow modules C are respectively connected to the control bus and the communication bus; and also includes an energy storage battery to be tested and a test tooling.

[0025] The structures of the pair-drag module A, the pair-drag module B and the pair-drag module C are the same. The pair-drag module includes a plurality of cross-connecting modules connected to the U, V, and W three-phase electrical phases and a plurality of transformer modules connected in series to the U, V, and W three-phase electrical phases. The transformer modules are numbered P1, P2, P3, ..., Pn, and the cross-connecting modules are numbered 1, 2, 3, ..., n, and the number of the cross-connecting modules is the same as that of the transformer modules. A plurality of electric knife switches 1 are provided on the main line of the U, V, and W three-phase electricity. The electric knife switches 1 are numbered K21, K22, K23, ..., K2 (n-1) in sequence. The electric knife switches are located in front of the corresponding cross-connecting module and the transformer module. An electric knife switch 2 is provided on the branch line of the three-phase electricity of each transformer module. The electric knife switches 2 are numbered K11, K12, K13, ..., K1n in sequence. The plurality of electric knife switches 1 and the plurality of electric knife switches 2 are all connected to the communication bus with the plurality of cross-connecting modules.

[0026] The crossover module includes several PCS submodules connected to the U, V, and W three-phase electrical phases and several RACK submodules. The number of the RACK submodules is the same as that of the PCS submodules. The RACK submodules and the PCS submodules are numbered 1, 2, 3, ..., m. Several RACK submodules are connected to corresponding PCS submodules. The PCS submodules are connected to the communication bus. The positive poles of several RACK submodules and the negative poles of several RACK submodules are connected. An electric knife switch is provided between two connected RACK submodules. The electric knife switch is connected to the communication bus. The moving switches three are numbered K31, K32, K33, ..., K3 (m-1) in sequence. The electric switch three is connected to the control bus. The electric switch three K3i (i=1~m) inside the cross-connect module is disconnected. Each PCS sub-module and RACK sub-module is installed according to the test requirements, and the maximum power of the installed RACK sub-module is less than the maximum power of the PCS module on the same circuit. The specifications of RACKi (i=1~m) can be different to support mixed testing, and the specifications of PCSi (i=1~m) can be different to support mixed testing.

[0027] The PCS submodule inside the cross-parallel module supports a maximum of m DC-side parallel machines, so the maximum power supported by each cross-parallel module is m*P pcs ; If the power of the energy storage module in parallel with the DC side to be tested is P 储能单元 <=m*P pcs , the cross-connection module is internally configured with x PCS DC side parallel machines added to the test platform, that is, x switches are closed, where x is P 储能单元 / P pcs If the value is rounded to an integer, the test console controls K31 to K3x to close, and the battery cluster RACK to be tested is installed in the first x RACK submodule positions, and the remaining RACK positions in the crossover module are vacant and not installed; If the power of the energy storage module in parallel with the DC side to be tested is P 储能单元 >m*P pcs , that is, P 余 =P 储能单元 -m*P pcs ,Assign the extra battery clusters to be tested to the next crossover module and follow the above steps.

[0028] The maximum power supported by the drag module is n*m*P pcs , if the maximum power of the energy storage system to be tested is P 储能系统 , then set y three-phase AC side parallel machines of the drag module to join the test platform, where y is P 储能系统 / P 储能单元 If the test console controls K11~K1y to be closed and K21~K2y to be disconnected, the active power P1~Py of the transformer modules 1~y will reach at least P储能单元 , that is, P 组串p =P 储能单元 .

[0029] The RACK submodule is composed of several battery PACKs connected in series. In the same batch test, the specifications of the battery cluster RACK to be tested are the same, and the specifications of the PCS are the same.

[0030] Maximum supported test power P of the cross-connect module 交并j = , the minimum test power is P 交并j = .

[0031] The minimum support for the drag module is one cross-module test, that is, the test console controls K21 to be disconnected and K11 to be closed, that is, the minimum centralized energy storage system tests the power module P 储能系统min = ; The maximum number of parallel tests supported for the drag module is n. That is, the test console controls K21~K2n-1 to be closed, K11~K1n-1 to be disconnected, and K1n to be closed. That is, the maximum centralized energy storage system tests the power module P 储能系统max = .

[0032] The maximum power specification of the transformer module is calculated according to the maximum power of the parallel module to be tested. 集中q = , where q is any qth transformer module from 1 to n.

[0033] like Figure 5 As shown, the modular energy storage system test method includes the following test steps: Step 1, importing the specifications of the energy storage system to be tested: according to the power and parameters to be tested, PCSs of various power types can be tested, and the specifications of the energy storage system to be tested are imported as 280Ah, 314Ah, etc.; Step 2: Comprehensive decision-making for electrical monitoring: By real-time monitoring of electrical parameters (such as current, voltage, power factor, etc.) and the operating status of equipment (such as the opening and closing status of circuit breakers and contactors), abnormal conditions in the system can be discovered in time to prevent potential power failures, optimize load distribution, reduce power loss, and improve the overall reliability and energy efficiency of the power supply system. Detailed data analysis and prediction results are provided to provide strong decision-making support for management; Step 3: Recommend the optimal solution for the tooling configuration of the energy storage system to be tested: Configure the transformer module power. The transformer module power q (q is any transformer module with q between 1 and n) in the modular test platform is calculated according to P 集中q Configuration, the maximum supported test power P of the crossover module j 交并j = , the maximum centralized energy storage system test power module P 储能系统max = , the maximum power calculation of the cross-connection module to be tested, such as P 集中q = , and the supporting primary topology; Step 4: Determine whether the test is performed according to the recommended configuration scheme: if yes, self-identify the electrical control category of the energy storage system, and proceed to step 5; if no, adjust the specifications of the energy storage system to be tested or adjust the tooling test parameters, and then proceed to step 1 and repeat the operation; Step 5, determine whether it is a string energy storage system: if yes, proceed to step 6 of the string energy storage system test process; if no, proceed to step 7 of the centralized energy storage system test process; Step 6, production of the string energy storage system test process: one pair of drag modules is the energy storage system power, and the other pair of drag modules is configured. The test console starts the RACK submodule and PCS submodule under the configured two pair of drag modules, and controls one pair of drag modules to charge and the other pair of drag modules to discharge. The charging and discharging of the pair of drag modules are carried out in reverse. The power and temperature curve of the PCS submodule are adjusted according to the state of the RACK submodule, and the reverse flow device is simultaneously guaranteed not to discharge to the grid, and the power of the monitoring and regulating transformer module is not overloaded, otherwise the PCS submodule is controlled to reduce the power operation, and the configuration and control protection of the string energy storage system test platform are realized, and step 8 is performed; Step 7, centralized energy storage system test process production: RACK submodule, PCS submodule and transformer are configured according to the rules, then the test console can adjust K11, K12 and K13 according to the energy storage power to be tested at this time, so that the test platform meets the current power and parameters to be tested; on this basis, during the test process, the test console controls in the manner of step 3 and proceeds to step 8; Step 8: Detection and switching: Detect the integrity of the tooling to be tested and control the switching of the actuator of the tooling to be tested; Step 9, automated testing: start automated testing according to the test steps; Step 10: Determine whether the test is passed. If it is passed, the product can be shipped. If it is not passed, a test exception report is made and the process goes to step 11. Step 11, determine whether the test tooling is abnormal: if so, perform test tooling abnormality diagnosis, go to step 8, and re-operate; if not, perform system rectification, re-test, go to step 9, and re-operate.

[0034] In summary, the test console is used to select according to the configuration; this modular test platform can test different battery configurations, different PCS configurations, different transformer module configurations, and compatible in-loop tests of string energy storage systems and centralized energy storage systems; It can automatically configure the test fixtures of corresponding specifications according to the specifications and characteristics of the energy storage system to be tested. During the test process, the full set of test items is completed automatically while ensuring the electrical safety in the factory, realizing automation, saving costs and avoiding problems and risks after leaving the factory. Supports automatic configuration of test platforms for mixed tests of RACK, PCS and other specifications; The energy storage system can be tested in the loop and the reverse overload protection can be adjusted during the control test so that power will not flow back to the grid and cause a fine.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A modular energy storage system test platform, comprising a test console, a pair-drag module A, a pair-drag module B, a pair-drag module C and a countercurrent device, characterized in that: The pair-drag module C is a backup pair-drag module that is restarted when the system of the pair-drag module A or the pair-drag module B fails to operate due to an abnormality; the test console controls one of the pair-drag modules A and the pair-drag module B to charge, and the other pair-drag module discharges, the countercurrent device is connected between the test console and the power grid, and the countercurrent device is connected between the pair-drag module A, the pair-drag module B and the pair-drag module C and the power grid; the test console, the pair-drag module A, the pair-drag module B and the pair-drag module C are respectively connected to the control bus and the communication bus; and also includes a storage battery to be tested and a test tooling.

2. A modular energy storage system test platform according to claim 1, characterized in that: The structures of the pair-drag module A, the pair-drag module B and the pair-drag module C are the same. The pair-drag module includes a plurality of cross-connecting modules connected to the U, V, and W three-phase electrical phases and a plurality of transformer modules connected in series to the U, V, and W three-phase electrical phases. The transformer modules are numbered P1, P2, P3, ..., Pn, and the cross-connecting modules are numbered 1, 2, 3, ..., n, and the number of the cross-connecting modules is the same as that of the transformer modules. A plurality of electric knife switches 1 are provided on the main line of the U, V, and W three-phase electricity. The electric knife switches 1 are numbered K21, K22, K23, ..., K2 (n-1) in sequence. The electric knife switches are located in front of the corresponding cross-connecting module and the transformer module. An electric knife switch 2 is provided on the branch line of the three-phase electricity of each transformer module. The electric knife switches 2 are numbered K11, K12, K13, ..., K1n in sequence. The plurality of electric knife switches 1 and the plurality of electric knife switches 2 are all connected to the communication bus with the plurality of cross-connecting modules.

3. A modular energy storage system test platform according to claim 2, characterized in that: The crossover module includes several PCS submodules and several RACK submodules connected to the three-phase electrical phases U, V, and W. The number of the RACK submodules is the same as that of the PCS submodules. The RACK submodules and the PCS submodules are numbered 1, 2, 3, ..., m. Several RACK submodules are connected to the corresponding PCS submodules. The PCS submodules are connected to the communication bus. The positive poles of several RACK submodules and the negative poles of several RACK submodules are connected. An electric knife switch 3 is provided between two connected RACK submodules. The electric switch three are numbered K31, K32, K33, ..., K3 (m-1) in sequence. The electric switch three is connected to the control bus, and the electric switch three K3i (i=1~m) inside the cross-connect module is disconnected. Each PCS sub-module and RACK sub-module is installed according to the test requirements, and the maximum power of the installed RACK sub-module is less than the maximum power of the PCS module on the same circuit. The specifications of RACKi (i=1~m) can be different to support mixed testing, and the specifications of PCSi (i=1~m) can be different to support mixed testing.

4. A modular energy storage system test platform according to claim 3, characterized in that: The PCS submodule inside the cross-connect module supports a maximum of m DC-side parallel machines, so the maximum power supported by each cross-connect module is m*P pcs ; If the power of the energy storage module in parallel with the DC side to be tested is P 储能单元 <=m*P pcs , the cross-connection module is internally configured with x PCS DC side parallel machines added to the test platform, that is, x switches are closed, where x is P 储能单元 / P pcs If the value is rounded to an integer, the test console controls K31 to K3x to close, and the battery cluster RACK to be tested is installed in the first x RACK submodule positions, and the remaining RACK positions in the crossover module are vacant and not installed; If the power of the energy storage module in parallel with the DC side to be tested is P 储能单元 >m*P pcs , that is, P 余 =P 储能单元 -m*P pcs ,Assign the extra battery clusters to be tested to the next crossover module and follow the above steps.

5. A modular energy storage system test platform according to claim 4, characterized in that: The maximum power supported by the pair-drag module is n*m*P pcs , if the maximum power of the energy storage system to be tested is P 储能系统 , then set y three-phase AC side parallel machines of the drag module to join the test platform, where y is P 储能系统 / P 储能单元 If the test console controls K11~K1y to be closed and K21~K2y to be disconnected, the active power P1~Py of the transformer modules 1~y will reach at least P 储能单元 , that is, P 组串p =P 储能单元 .

6. A modular energy storage system test platform according to claim 5, characterized in that: The RACK submodule is composed of a number of battery PACKs connected in series. In the same batch test, the specifications of the battery clusters RACK to be tested are the same, and the specifications of the PCS are the same.

7. A modular energy storage system test platform according to claim 6, characterized in that: The maximum supported test power P of the cross-combination module 交并j = , the minimum test power is P 交并j = .

8. A modular energy storage system test platform according to claim 7, characterized in that: The pair-drag module supports at least one cross-module test, that is, the test console controls K21 to be disconnected and K11 to be closed, that is, the minimum centralized energy storage system tests the power module P 储能系统min = ; The maximum number of parallel tests supported for the drag module is n. That is, the test console controls K21~K2n-1 to be closed, K11~K1n-1 to be disconnected, and K1n to be closed. That is, the maximum centralized energy storage system tests the power module P 储能系统max = .

9. A modular energy storage system test platform according to claim 8, characterized in that: The maximum power specification of the transformer module is calculated according to the maximum power of the parallel module to be tested. 集中q = , where q is any qth transformer module from 1 to n.

10. A modular energy storage system testing method, using the modular energy storage system testing platform as claimed in claim 9, characterized in that: Step 1: Import the specifications of the energy storage system to be tested: According to the power and parameters to be tested, PCSs of various power types can be tested and the specifications of the energy storage system to be tested can be imported; Step 2: Comprehensive decision-making for electrical monitoring: By real-time monitoring of electrical parameters, including but not limited to current, voltage, power factor and the operating status of equipment, including but not limited to the opening and closing status of circuit breakers and contactors, abnormal conditions in the system can be discovered in time to prevent potential power failures, optimize load distribution, reduce power loss, and improve the overall reliability and energy efficiency of the power supply system. Detailed data analysis and prediction results are provided to provide strong decision-making support for management; Step 3: Recommend the optimal solution for the tooling configuration of the energy storage system to be tested: Configure the transformer module power. The transformer module power q (q is any transformer module with q between 1 and n) in the modular test platform is calculated according to P 集中q Configuration, the maximum supported test power P of the crossover module j 交并j = , the maximum centralized energy storage system test power module P 储能系统max = , the maximum power calculation of the parallel module to be tested, P 集中q = , and the supporting primary topology; Step 4: Determine whether the test is performed according to the recommended configuration scheme: if yes, self-identify the electrical control category of the energy storage system, and proceed to step 5; if no, adjust the specifications of the energy storage system to be tested or adjust the tooling test parameters, and then proceed to step 1 and repeat the operation; Step 5, determine whether it is a string energy storage system: if yes, proceed to step 6 of the string energy storage system test process; if no, proceed to step 7 of the centralized energy storage system test process; Step 6, production of the string energy storage system test process: one pair of drag modules is the energy storage system power, and the other pair of drag modules is configured. The test console starts the RACK submodule and PCS submodule under the configured two pair of drag modules, and controls one pair of drag modules to charge and the other pair of drag modules to discharge. The charging and discharging of the pair of drag modules are carried out in reverse. The power and temperature curve of the PCS submodule are adjusted according to the state of the RACK submodule, and the reverse flow device is simultaneously guaranteed not to discharge to the grid, and the power of the monitoring and regulating transformer module is not overloaded, otherwise the PCS submodule is controlled to reduce the power operation, and the configuration and control protection of the string energy storage system test platform are realized, and step 8 is performed; Step 7, centralized energy storage system test process production: RACK submodule, PCS submodule and transformer are configured according to the rules, then the test console can adjust K11, K12 and K13 according to the energy storage power to be tested at this time, so that the test platform meets the current power and parameters to be tested; on this basis, during the test process, the test console controls in the manner of step 3 and proceeds to step 8; Step 8: Detection and switching: Detect the integrity of the tooling to be tested and control the switching of the actuator of the tooling to be tested; Step 9, automated testing: start automated testing according to the test steps; Step 10: Determine whether the test is passed: if it is passed, the product can be shipped; If it fails, a test exception report is made and the process goes to step 11; Step 11, determine whether the test tooling is abnormal: if so, perform test tooling abnormality diagnosis, go to step 8, and re-operate; if not, perform system rectification, re-test, go to step 9, and re-operate.

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