Test system, method and device of energy storage system and storage medium

Abstract

The invention discloses a test system, method and device of an energy storage system and a storage medium. The energy storage system comprises a plurality of first energy storage modules to be tested, and the test system comprises a second energy storage module which is connected with the first energy storage modules to be tested; the first end of the reactor is connected with the first energy storage module to be tested, and the second end of the reactor is connected with the second energy storage module; the controller is connected with the to-be-tested first energy storage module and the to-be-tested second energy storage module, and the controller is used for controlling the to-be-tested first energy storage module and the to-be-tested second energy storage module to run so as to simulate the running states of the to-be-tested first energy storage module under different running conditions, and the running performance result of the to-be-tested first energy storage module is obtained. According to the embodiment of the invention, the reliability of the novel energy storage system can be tested when the single-phase energy storage module operates under various operation conditions.

Description

Technical Field

[0001] This application belongs to the technical field of energy storage systems, and particularly relates to a test system, method, device and storage medium for an energy storage system. Background Art

[0002] Energy storage systems can provide active power and reactive power support for the power grid, and play an important role in scenarios such as improving power grid stability, accommodating new energy, and optimizing dispatching. They are important equipment for new power systems.

[0003] In related technologies, a new type of energy storage system includes three energy storage modules, and the three energy storage modules are respectively connected to one of the corresponding three phases to store electrical energy. This new type of energy storage system has advantages such as flexible control, strong overload capacity, and less device usage, and has great application potential.

[0004] In related technologies, to ensure the stable operation of the new type of energy storage system, generally before the energy storage system runs again, it is necessary to test the energy storage system to ensure the stability of the energy storage system and the power grid after the energy storage system is connected to the power grid; therefore, for the current new type of energy storage system, a test system for the energy storage system is urgently needed. Summary of the Invention

[0005] Embodiments of this application provide a test system, method, device and storage medium for an energy storage system, which can perform reliability tests on a new type of energy storage system when a single-phase energy storage module operates under various operating conditions.

[0006] On the one hand, embodiments of this application provide a test system for an energy storage system. The energy storage system includes a plurality of first energy storage modules to be tested. The test system includes:

[0007] A second energy storage module, which is connected to the first energy storage module to be tested;

[0008] A reactor, the first end of the reactor is connected to the first energy storage module to be tested, and the second end of the reactor is connected to the second energy storage module;

[0009] A controller, which is respectively connected to the first energy storage module to be tested and the second energy storage module. The controller is used to control the operation of the first energy storage module to be tested and the second energy storage module to simulate the operating state of the first energy storage module to be tested under different operating conditions, and obtain the operating performance results of the first energy storage module to be tested.

[0010] Optionally, the second energy storage module includes:

[0011] The first battery pack, the first battery pack includes a plurality of batteries and a plurality of first control units corresponding to the batteries one by one. The control terminal of the first control unit is connected to the controller, and the input terminal of the first control unit is connected to the corresponding battery; in the first battery pack, the first control unit is used to adjust the input and cut-out state of the corresponding battery;

[0012] The inverter unit, the DC terminal of the inverter unit is connected to the first battery pack, and the AC terminal of the inverter unit is connected to the AC terminal of the first energy storage module to be tested;

[0013] The sampling input terminal of the controller is connected to the AC terminal of the first energy storage module to be tested;

[0014] The controller is used to control the number of batteries connected in series in the first battery pack and collect the electrical energy parameters of the second energy storage module to calculate the power parameters of the energy storage system.

[0015] Optionally, the energy storage system includes three first energy storage modules, and the three first energy storage modules respectively correspond to the three-phase alternating current of the AC power grid; the second energy storage module is one of the other two first energy storage modules in the energy storage system except the first energy storage module to be detected.

[0016] On the other hand, the embodiment of the present application provides a test method for an energy storage system, which is applied to the controller in the first aspect. The method includes:

[0017] In response to the preset power parameter input by the user, generate the first electrical energy parameter of the first energy storage module to be tested and the second electrical energy parameter of the second energy storage module. The preset power parameter represents the operating condition of the energy storage system;

[0018] Based on the first electrical energy parameter and the second electrical energy parameter, test the first energy storage module to be tested and / or the second energy storage module to obtain a test result.

[0019] Optionally, based on the first electrical energy parameter and the second electrical energy parameter, testing the first energy storage module to be tested and / or the second energy storage module to obtain a test result includes:

[0020] Based on the first electrical energy parameter, control the operation of the first energy storage module to be tested to collect the first output parameter of the first energy storage module to be tested. The first output parameter includes the first amplitude and the first phase;

[0021] Based on the second electrical energy parameter, control the operation of the second energy storage module to collect the second output parameter of the second energy storage module. The second output parameter includes the second amplitude and the second phase;

[0022] Based on the first output parameter and the second output parameter, determine the test result.

[0023] Optionally, based on the first output parameter and the second output parameter, determine the test result, including:

[0024] Based on the first output parameter and the second output parameter, calculate the active power parameter;

[0025] Based on the first output parameter and the second output parameter, calculate the reactive power parameter;

[0026] Based on the active power parameter, the reactive power parameter, and the preset power parameter, determine the test result.

[0027] Optionally, based on the first output parameter and the second output parameter, calculate the active power parameter, including:

[0028]

[0029] Wherein, P is the active power parameter, U1 is the first amplitude of the first energy storage module to be tested, U2 is the second amplitude of the second energy storage module, L s is the inductance value; δ is the second phase of the second energy storage module, and ω is the angular frequency of the power grid.

[0030] Optionally, based on the first output parameter and the second output parameter, calculate the reactive power parameter, including:

[0031]

[0032] Wherein, Q is the reactive power parameter, U1 is the first amplitude of the first energy storage module to be tested, U2 is the second amplitude of the second energy storage module, L s is the inductance value; δ is the second phase of the second energy storage module, and ω is the angular frequency of the power grid.

[0033] On the other hand, an embodiment of the present application provides a test device for an energy storage system, the device includes:

[0034] A response generation module, configured to generate a first electrical energy parameter of the first energy storage module to be tested and a second electrical energy parameter of the second energy storage module in response to a preset power parameter input by a user, where the preset power parameter represents the operating condition of the energy storage system;

[0035] A test module, configured to test the first energy storage module to be tested and / or the second energy storage module based on the first electrical energy parameter and the second electrical energy parameter, and obtain a test result.

[0036] On yet another aspect, an embodiment of the present application provides an electronic device, the device includes: a processor and a memory storing computer program instructions;

[0037] When the processor executes the computer program instructions, the test method for the energy storage system as described in the first aspect is implemented.

[0038] In another aspect, an embodiment of the present application provides a computer storage medium. Computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are executed by a processor, the test method of the energy storage system as described in the second aspect is implemented.

[0039] In another aspect, an embodiment of the present application provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device is caused to execute the test method of the energy storage system as described in the second aspect.

[0040] The test system, method, device, and storage medium of the energy storage system according to the embodiments of the present application can be used for a new energy storage system in which each phase has a separate energy storage module. When performing a running performance test, it is necessary to separately test the first energy storage module corresponding to each phase, that is, connect the first energy storage module and the second energy storage module to achieve a counter-dragging between the first energy storage module and the second energy storage module. Then, the controller controls the first energy storage module and the second energy storage module to be tested to operate under different operating conditions, and then collects the power parameters of the first energy storage module and the second energy storage module under different operating conditions to obtain the running performance results of the first energy storage module to be tested, so as to determine the running performance of the first energy storage module to be tested under different operating conditions through the running performance results, so as to implement the condition test of the first energy storage module to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0042] Figure 1 is the system topology diagram of the energy storage system provided by an embodiment of the present application;

[0043] Figure 2 is the system topology diagram of the test system provided by an embodiment of the present application;

[0044] Figure 3 is the circuit schematic diagram of the second energy storage module provided by an embodiment of the present application;

[0045] Figure 4 is the flow schematic diagram of the test method of the energy storage system provided by an embodiment of the present application;

[0046] Figure 5 is the flow schematic diagram of the test method of the energy storage system provided by another embodiment of the present application;

[0047] Figure 6It is a schematic structural diagram of a test device for an energy storage system provided by another embodiment of the present application;

[0048] Figure 7 It is a schematic structural diagram of an electronic device provided by yet another embodiment of the present application.

[0049] Description of reference numerals:

[0050] 1. Energy storage system; 11. First energy storage module; 111. Second battery pack; 112. Second control unit; 12. Power conversion module; 13. Transformer; 2. Test system; 21. Second energy storage module; 211. First battery pack; 212. First control unit; 213. Inverter unit; 22. Reactor; 23. Controller. Detailed implementation manners

[0051] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than limiting the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0052] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements.

[0053] To solve the problems of the prior art, embodiments of the present application provide a test system, method, device, and storage medium for an energy storage system. In the embodiments of the present application, for a new energy storage system in which each phase has a separate energy storage module, when performing an operating performance test, it is necessary to separately test the first energy storage module corresponding to each phase, that is, connect the first energy storage module to the second energy storage module to realize the counter-dragging of the first energy storage module and the second energy storage module. Then, the controller controls the first energy storage module and the second energy storage module to be tested to operate under different operating conditions, and then collects the power parameters of the first energy storage module and the second energy storage module under different operating conditions to obtain the operating performance result of the first energy storage module to be tested, so as to determine the operating performance of the first energy storage module to be tested under different operating conditions through the operating performance result, so as to realize the condition test of the first energy storage module to be tested.

[0054] To better understand the present application, before introducing the present application, a new energy storage system will be introduced first.

[0055] Refer to Figure 1 , Figure 1 FIG. shows a topology diagram of the functions of the new energy storage system of the present application. The energy storage system 1 may include a plurality of first energy storage modules 11 and a plurality of power conversion modules 12. The first energy storage modules 11 and the power conversion modules 12 are in one-to-one correspondence. The plurality of first energy storage modules 11 are connected to the power conversion modules 12, and the power conversion modules 12 are also connected to a transformer 13. Among them, the plurality of first energy storage modules 11 are used to store electric energy, and the power conversion modules 12 are used to convert the electric energy so that the energy storage system 1 can compensate or store the electric energy.

[0056] In a specific example, the transformer 13 may be a three-phase transformer 13. For such a three-phase transformer 13, at least one first energy storage module 11 and at least one power conversion module 12 may be provided for each phase, that is, the new energy storage system 1 stores the electric energy of each phase separately.

[0057] As an example, the first energy storage module 11 may include a second battery pack 111. The second battery pack 111 may include a plurality of batteries and a second control unit 112 connected to the plurality of batteries correspondingly. Among them, the plurality of batteries are connected in series.

[0058] The power conversion module 12 may include a full-bridge commutation unit. The DC terminal of the full-bridge commutation unit is connected to the second battery pack 111, and the AC terminal of the full-bridge commutation unit is connected to the transformer 13.

[0059] In some embodiments, the full-bridge commutation unit may be an H-bridge commutation circuit. As an example, the H-bridge commutation circuit may include four groups of thyristor valve groups, and the four groups of thyristor valve groups form the bridge arms of the H-bridge to achieve the forward and reverse output of the DC-side voltage to the AC-side by the conduction of different valve groups.

[0060] In one embodiment, the thyristor valve group may be an integrated gate-commutated thyristors (IGCT) valve group. Each thyristor valve group includes multiple IGCT thyristors to increase the voltage level, and each IGCT thyristor is reversely connected in parallel with a diode to achieve reverse current conduction.

[0061] In some embodiments, the thyristor valve group may also be an insulated gate bipolar transistor (IGBT) valve group.

[0062] When inputting the electric energy of the first energy storage module 11 into the AC power grid, the number of batteries to be put in or cut out can be determined by controlling the on / off of the second control unit 112 to achieve multi-level output; the input and cut-out of the battery pack can also be achieved by controlling the on / off of the switches of the power conversion module 12.

[0063] Next, the test system 2 of the energy storage system 1 provided by the embodiments of the present application will be introduced.

[0064] In the embodiments of the present application, referring to Figure 2 and Figure 3 , the test system 2 may include:

[0065] A second energy storage module 21, which is connected to the first energy storage module 11 to be tested;

[0066] A reactor 22, the first end of the reactor 22 is connected to the first energy storage module 11 to be tested, and the second end of the reactor 22 is connected to the second energy storage module 21;

[0067] A controller 23, which is respectively connected to the first energy storage module 11 and the second energy storage module 21 to be tested. The controller 23 is used to control the operation of the first energy storage module 11 and the second energy storage module 21 to be tested, so as to simulate the operation state of the first energy storage module 11 to be tested under different operating conditions and obtain the operation performance results of the first energy storage module 11 to be tested.

[0068] In the embodiment of the present application, for a new energy storage system 1 in which each phase has a separate energy storage module, when performing an operation performance test, it is necessary to separately test the first energy storage module 11 corresponding to each phase, that is, connect the first energy storage module 11 to the second energy storage module 21 to realize the counter-dragging between the first energy storage module 11 and the second energy storage module 21. Then, the controller 23 controls the first energy storage module 11 and the second energy storage module 21 to be tested to operate under different operating conditions, and then collects the power parameters of the first energy storage module 11 and the second energy storage module 21 under different operating conditions to obtain the operation performance result of the first energy storage module 11 to be tested, so as to determine the operation performance of the first energy storage module 11 to be tested under different operating conditions through the operation performance result, so as to realize the condition test of the first energy storage module 11 to be tested.

[0069] In some cases, the controller 23 can be connected to the branch where the reactor 22 is located, or can be connected to another branch, for collecting the power parameters of the first energy storage module 11 to be tested.

[0070] In some embodiments, to realize the counter-dragging test on the first energy storage module 11 to be tested, in the embodiment of the present application, the second energy storage module 21 may include:

[0071] The first battery pack 211, the first battery pack 211 includes a plurality of batteries and a plurality of first control units 212 corresponding to the batteries one by one. The control end of the first control unit 212 is connected to the controller 23, and the input end of the first control unit 212 is connected to the corresponding battery; in the first battery pack 211, the first control unit 212 is used to adjust the input and cut-out states of the corresponding batteries;

[0072] The inverter unit 213, the DC end of the inverter unit 213 is connected to the first battery pack 211, and the AC end of the inverter unit 213 is connected to the AC end of the first energy storage module 11 to be tested;

[0073] The sampling input end of the controller 23 is connected to the AC end of the first energy storage module 11 to be tested;

[0074] The controller 23 is used to control the number of batteries connected in series in the first battery pack 211 and collect the electrical energy parameters output by the second energy storage module 21 to calculate the power parameters of the energy storage system 1.

[0075] In this embodiment, when testing the first energy storage module 11 to be tested, the controller 23 can control the number of batteries connected in series in the first battery pack 211 to make the second energy storage module 21 generate an alternating current voltage with a specified amplitude and phase. At this time, the controller 23 can control whether the first battery pack 211 is put into operation by controlling the switches of the first control unit 212, so that the second energy storage module 21 generates a test alternating current voltage. Then, the controller 23 controls the first energy storage module 11 to perform corresponding actions to calculate the power parameters of the energy storage system 1, so as to determine whether the first energy storage module 11 can operate stably.

[0076] Further, as an example, the specific circuit connection mode of the second energy storage module 21 refers to Figure 3 , in this example, the battery can be a capacitor C1 or multiple batteries connected in series. The first control unit 212 can include a first switching tube U1. The control end of the first switching tube U1 is connected to the controller 23. The first end of the first switching tube U1 is connected to one end of the battery, and the second end of the first switching tube U1 is connected to the DC end of the inverter unit 213.

[0077] When controlling the first energy storage module 11 to be tested, the controller 23 can send an input trigger signal to the first switching tube U1, and the first switching tube conducts. At this time, the battery corresponding to the first switching tube U1 is put into use. In the case of cutting out the battery, the controller 23 can send a cut-out trigger signal to the first switching tube U1, and the first switching tube U1 turns off, and the battery is cut out.

[0078] As an example, the first switching tube U1 can be a half-bridge commutation unit, and each half-bridge commutation unit can be an IGBT or a MOS tube, which is not limited here.

[0079] In some embodiments, the inverter unit 213 can include four groups of thyristor valve strings, and each group of thyristor valve strings includes at least two thyristors. Among them, the multiple thyristors on the same group of thyristor valve strings are connected in series in sequence, and a diode is reversely connected in parallel on each thyristor, and the diode is a freewheeling diode.

[0080] In some embodiments, when the energy storage system 1 includes three first energy storage modules 11, the three first energy storage groups respectively correspond to the three-phase alternating current of the AC power grid; when testing the first energy storage module 11 to be tested, the second energy storage module 21 can be one of the other two first energy storage modules 11 in the energy storage system 1 except the first energy storage module 11 to be detected.

[0081] In this embodiment, the second energy storage module 21 can be a single type of energy storage module, as long as it can output a set active power and / or receive the reactive power output by other energy storage modules. To improve the test efficiency, mutual dragging can be performed based on the three first energy storage modules 11 of the energy storage system 1 to test the operating performance of the three first energy storage modules 11 of the energy storage system 1.

[0082] In some other embodiments, to ensure the operation of the energy storage system 1, a standby energy storage module can be connected in parallel to each corresponding first energy storage module 11. The standby energy storage module can be used as the second energy storage module 21 to test the first energy storage module 11 to be tested. When the first energy storage module 11 is damaged, the damaged first energy storage module 11 can be replaced to store the electric energy of this phase, and at the same time, the active power or reactive power of this phase can be compensated to maintain three-phase balance.

[0083] Refer to Figure 4 , the embodiment of the present application also provides a test method for an energy storage system. Figure 4 shows a schematic flow chart of the test method for the energy storage system. The test method for the energy storage system can include S401 - S402:

[0084] S401, in response to the preset power parameters input by the user, generate the first electrical energy parameters of the first energy storage module to be tested and the second electrical energy parameters of the second energy storage module.

[0085] In some embodiments, when testing the first energy storage module to be tested, since there are multiple operating conditions in the energy storage system, the user can input different preset power parameters through the controller to simulate the operating conditions of the energy storage system and test the operating performance of the first energy storage module to be tested.

[0086] As an example, the preset power parameters represent the operating conditions of the energy storage system; among them, the preset power parameters can include input power parameters and output power parameters. The input power parameters can be input active power parameters or input reactive power parameters, and the output power parameters can include output active power parameters or output reactive power parameters. The input power parameters and output power parameters appear in pairs, that is, if the input power parameter is the input active power parameter, then the output power parameter is the output active power parameter; if the input power parameter is the input reactive power parameter, then the output power parameter is the output reactive power parameter.

[0087] In some embodiments, the first energy storage module to be tested can be used only as an active power cabinet to provide active power, or only as a reactive power cabinet to provide reactive power support. Therefore, for the first energy storage module to be tested, only the performance of the active power can be tested, or only the function of the reactive power can be tested, which is not limited here.

[0088] S402. Based on the first power parameter and the second power parameter, test the first energy storage module and / or the second energy storage module to be tested, and obtain a test result.

[0089] In this embodiment, when performing a running performance test on the first energy storage module to be tested, the controller can determine whether to perform an active power test or a reactive power test according to the preset power parameter input by the user, or it can be a simultaneous test of active power and reactive power. Then, according to the input preset power parameter, the first power parameter and the second power parameter are generated. After that, according to the first power parameter and the second power parameter, the corresponding energy storage module is controlled to operate, that is, the corresponding battery is controlled to be put in and the inverter unit works, so that the first energy storage module to be tested simulates different operating conditions, so as to realize the running performance test of the first energy storage module to be tested and obtain a test result. In this way, the above single-phase energy storage module can operate in various operating conditions, and whether it can operate for a specified time, and the voltage and current waveforms are recorded for subsequent analysis, so as to verify the working ability of the energy storage system.

[0090] Refer to Figure 5 , in some embodiments, S402 may specifically include S4021 - S4023:

[0091] S4021. Based on the first power parameter, control the operation of the first energy storage module to be tested to collect the first output parameter of the first energy storage module to be tested;

[0092] S4022. Based on the second power parameter, control the operation of the second energy storage module to collect the second output parameter of the second energy storage module;

[0093] S4023. Based on the first output parameter and the second output parameter, determine the test result.

[0094] In this embodiment, in S4021, as an example, the first output parameter may include a first amplitude and a first phase, and the first power parameter may include a first preset amplitude and a first preset phase; the controller can control the first control unit in the first energy storage module to be tested to conduct, so as to control the input of the battery, change the output voltage of the first energy storage module, realize multi-level output, and ensure that the energy storage module to be tested reaches the operating state corresponding to the operating condition, so as to collect the first output parameter of the first energy storage module to be tested, so as to verify the running performance of the first energy storage module to be tested.

[0095] In some other embodiments, in S4022, when the second energy storage module is one of the other two first energy storage modules in the energy storage system except the first energy storage module to be detected, the second energy storage module can be directly docked. At this time, if the first energy storage module to be tested outputs active power, then the input active power of the second energy storage module can be tested to test the first energy storage module to be tested and the second energy storage module simultaneously.

[0096] As an example, the second output parameter includes a second amplitude and a second phase, and the second electrical energy parameter may include a second preset amplitude and a second preset phase.

[0097] In some embodiments, in S4023, the output active power of the first energy storage module to be tested and the input active power of the second energy storage module can be determined respectively through the first output parameter and the second output parameter, or the input active power of the first energy storage module to be tested and the output active power of the second energy storage module can be determined respectively through the first output parameter and the second output parameter, and then the test result can be determined through the first output parameter and the second output.

[0098] Furthermore, S4023 may specifically include:

[0099] Calculate the active power parameter based on the first output parameter and the second output parameter;

[0100] Calculate the reactive power parameter based on the first output parameter and the second output parameter;

[0101] Determine the test result based on the active power parameter, the reactive power parameter, and the preset power parameter.

[0102] In this embodiment, in order to facilitate the calculation of the active power, it can be stipulated that the first phase of the first energy storage module to be tested is 0, and the second amplitude output by the second energy storage module is the AC rated voltage. The active power parameter can be calculated through the following formula (1):

[0103]

[0104] Where P is the active power parameter, U1 is the first amplitude of the first energy storage module to be tested, U2 is the second amplitude of the second energy storage module, L s is the inductance value; δ is the second phase of the second energy storage module, and ω is the angular frequency of the power grid.

[0105] It should be noted that if the second energy storage module is one of the other two first energy storage modules in the energy storage system except the first energy storage module to be detected, then at this time L s the inductance value is the sum of the inductance values of the two phases separately.

[0106] In some other embodiments, in the test of reactive power compensation, the following formula (2) can be used to calculate the reactive power:

[0107]

[0108] Where Q is the reactive power parameter, U1 is the first amplitude of the first energy storage module to be tested, U2 is the second amplitude of the second energy storage module, L s is the inductance value; δ is the second phase of the second energy storage module, and ω is the angular frequency of the power grid.

[0109] In some other embodiments, based on the first output parameter and the second output parameter collected above, the active power parameter and the reactive power parameter of the first energy storage module to be tested can be calculated. That is, the active power parameter and the reactive power parameter calculated at this time are the power parameters generated during the actual test. Then, by comparing the active power parameter and the reactive power parameter with the preset power parameters, if they are equal within a certain error range, it indicates that the first energy storage module to be tested has good operating performance at this time, and the test result is qualified.

[0110] In some other embodiments, testing the first energy storage module to be tested can also be to test the stability of the first energy storage module to be tested during operation for a certain period of time. That is, within a certain time period, if both the active power parameter and the reactive power parameter are within the error range, it indicates that the test result is qualified. If there is a certain time interval outside the error range, the test result is modified to unqualified.

[0111] In addition, after the test, it is not only necessary to determine that both the active power parameter and the reactive power parameter are within the error range, but also to determine whether the energy storage system can operate safely and stably under the simulated operating conditions without damage or protection actions, etc., in order to conduct a complete and comprehensive test on the energy storage system.

[0112] In a specific example, the user can first input the preset power parameters, then specify that the first phase of the first energy storage module to be tested is 0 and the first amplitude is U1. Then, according to the above formulas (1) and (2), determine the second amplitude U2 and the second phase δ of the second energy storage module that need to be set. Then, test the first energy storage module to be tested according to the determined second amplitude and second phase to complete the operating performance test of the energy storage system.

[0113] Based on the test method of the energy storage system provided in the above embodiments, correspondingly, the present application also provides a specific implementation manner of the test device for the energy storage system. Please refer to the following embodiments.

[0114] Referring to Figure 6 , the test device 600 for the energy storage system may include:

[0115] A response generation module 601, configured to generate a first electrical energy parameter of a first energy storage module to be tested and a second electrical energy parameter of a second energy storage module in response to a preset power parameter input by a user, where the preset power parameter represents an operating condition of an energy storage system;

[0116] A testing module 602, configured to test the first energy storage module and / or the second energy storage module to be tested based on the first electrical energy parameter and the second electrical energy parameter, and obtain a test result.

[0117] As an optional implementation manner, the testing module 602 may specifically be configured to:

[0118] Control the operation of the first energy storage module to be tested based on the first electrical energy parameter, so as to collect a first output parameter of the first energy storage module to be tested, where the first output parameter includes a first amplitude and a first phase;

[0119] Control the operation of the second energy storage module based on the second electrical energy parameter, so as to collect a second output parameter of the second energy storage module, where the second output parameter includes a second amplitude and a second phase;

[0120] Determine the test result based on the first output parameter and the second output parameter.

[0121] As an optional implementation manner, the testing module 602 may specifically be configured to:

[0122] Calculate an active power parameter based on the first output parameter and the second output parameter;

[0123] Calculate a reactive power parameter based on the first output parameter and the second output parameter;

[0124] Determine the test result based on the active power parameter, the reactive power parameter, and the preset power parameter.

[0125] As an optional implementation manner, the testing module 602 may specifically be configured to:

[0126]

[0127] Wherein, P is the active power parameter, U1 is the first amplitude of the first energy storage module to be tested, U2 is the second amplitude of the second energy storage module, L s is the inductance value; δ is the second phase of the second energy storage module, and ω is the angular frequency of the power grid.

[0128] As an optional implementation manner, the testing module 602 may specifically be configured to:

[0129]

[0130] Wherein, Q is the reactive power parameter, U1 is the first amplitude of the first energy storage module to be tested, U2 is the second amplitude of the second energy storage module, and L s is the inductance value; δ is the second phase of the second energy storage module, and ω is the angular frequency of the power grid.

[0131] Figure 7 FIG. shows a schematic hardware structure diagram of an electronic device provided by an embodiment of the present application.

[0132] The electronic device may include a processor 701 and a memory 702 storing computer program instructions.

[0133] Specifically, the processor 701 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0134] The memory 702 may include a mass storage for data or instructions. By way of example and not limitation, the memory 702 may include a Hard Disk Drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. In one example, the memory 702 may include a removable or non-removable (or fixed) medium, or the memory 702 is a non-volatile solid-state memory. The memory 702 may be inside or outside the integrated gateway disaster recovery device.

[0135] In one example, the memory 702 may be a Read Only Memory (ROM). In one example, the ROM may be a mask-programmed ROM, a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), an Electrically Rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0136] The memory 702 may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage media device, an optical storage media device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Thus, generally, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the test method of the energy storage system according to the first aspect of the present disclosure.

[0137] The processor 701 reads and executes the computer program instructions stored in the memory 702 to implement Figure 4 a test method of an energy storage system in the illustrated embodiment.

[0138] In one example, the electronic device may further include a communication interface 703 and a bus 704. Among them, as Figure 7 shown, the processor 701, the memory 702, and the communication interface 703 are connected through the bus 704 and complete communication with each other.

[0139] The communication interface 703 is mainly used to implement communication between various modules, devices, units, and / or devices in the embodiments of the present application.

[0140] The bus 704 includes hardware, software, or both, and couples the components of the electronic device to each other. By way of example and not limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses or a combination of two or more of these. In a suitable case, the bus 704 may include one or more buses. Although the embodiments of the present application describe and illustrate a specific bus, the present application contemplates any suitable bus or interconnect.

[0141] The electronic device can execute the test method of the energy storage system in the embodiments of the present application, so as to implement in combinationFigures 4 - 6 Testing method and device for the described energy storage system.

[0142] In addition, in combination with the testing method for the energy storage system in the above embodiments, an embodiment of the present application can be implemented by providing a computer storage medium. Computer program instructions are stored on the computer storage medium; when the computer program instructions are executed by a processor, any one of the testing methods for the energy storage system in the above embodiments is implemented.

[0143] In an alternative embodiment, in combination with the testing method for the energy storage system in the above embodiments, an embodiment of the present application can be implemented by providing a computer program product. The instructions in the computer program product are executed by a processor of an electronic device, enabling the electronic device to implement any one of the testing methods for the energy storage system in the above embodiments.

[0144] It should be clear that the present application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present application.

[0145] The functional blocks shown in the above structural block diagrams can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted via a data signal carried in a carrier wave on a transmission medium or a communication link. A "machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical discs, hard disks, fiber optic media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet or an intranet.

[0146] It should also be noted that the exemplary embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps. That is, the steps can be executed in the order mentioned in the embodiments, or different from the order in the embodiments, or several steps can be executed simultaneously.

[0147] Aspects of the present disclosure have been described above with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each block in the flowcharts and / or block diagrams, and the combinations of blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / operations specified in one or more blocks of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It should also be understood that each block in the block diagram and / or flowchart, and the combinations of blocks in the block diagram and / or flowchart, can also be implemented by dedicated hardware that performs the specified functions or operations, or by a combination of dedicated hardware and computer instructions.

[0148] The above are only the specific implementation manners of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules, and units described above can refer to the corresponding processes in the foregoing method embodiments, which will not be elaborated herein. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and these modifications or substitutions should all be covered by the protection scope of the present application.

Claims

1. A test system for an energy storage system, characterized in that, The energy storage system includes a plurality of first energy storage modules to be tested, and the test system includes: A second energy storage module, which is connected to the first energy storage module to be tested; A reactor, the first end of the reactor is connected to the first energy storage module to be tested, and the second end of the reactor is connected to the second energy storage module; A controller, which is respectively connected to the first energy storage module to be tested and the second energy storage module. The controller is used to control the operation of the first energy storage module to be tested and the second energy storage module to simulate the operation state of the first energy storage module to be tested under different operating conditions, and obtain the operation performance result of the first energy storage module to be tested.

2. The test system according to claim 1, wherein The second energy storage module includes: A first battery pack, the first battery pack includes a plurality of batteries and a plurality of first control units corresponding to the batteries one by one. The control end of the first control unit is connected to the controller, and the input end of the first control unit is connected to the corresponding battery; in the first battery pack, the first control unit is used to adjust the input and cut-out state of the corresponding battery; An inverter unit, the DC end of the inverter unit is connected to the first battery pack, and the AC end of the inverter unit is connected to the AC end of the first energy storage module to be tested; The sampling input end of the controller is connected to the AC end of the first energy storage module to be tested; The controller is used to control the number of batteries connected in series in the first battery pack and collect the electrical energy parameters of the second energy storage module to calculate the power parameters of the energy storage system.

3. The test system according to claim 1, wherein The energy storage system includes three first energy storage modules, and the three first energy storage modules respectively correspond to three-phase alternating current of the AC power grid; the second energy storage module is one of the other two first energy storage modules in the energy storage system except the first energy storage module to be detected.

4. A testing method for an energy storage system, characterized in that, Applied to the controller according to any one of claims 1-3, the method includes: In response to a preset power parameter input by the user, generating a first electrical energy parameter of the first energy storage module to be tested and a second electrical energy parameter of the second energy storage module, and the preset power parameter represents the operating condition of the energy storage system; Testing the first energy storage module to be tested and / or the second energy storage module based on the first electrical energy parameter and the second electrical energy parameter to obtain a test result.

5. The method according to claim 4, characterized in that, The testing the first energy storage module to be tested and / or the second energy storage module based on the first electrical energy parameter and the second electrical energy parameter to obtain a test result includes: Controlling the operation of the first energy storage module to be tested based on the first electrical energy parameter to collect a first output parameter of the first energy storage module to be tested, and the first output parameter includes a first amplitude and a first phase; Controlling the operation of the second energy storage module based on the second electrical energy parameter to collect a second output parameter of the second energy storage module, and the second output parameter includes a second amplitude and a second phase; Determining a test result based on the first output parameter and the second output parameter.

6. The method according to claim 5, wherein The determining a test result based on the first output parameter and the second output parameter includes: Calculate the active power parameter based on the first output parameter and the second output parameter; Calculate the reactive power parameter based on the first output parameter and the second output parameter; Determine the test result based on the active power parameter, the reactive power parameter, and a preset power parameter.

7. The method according to claim 6, wherein The calculating the active power parameter based on the first output parameter and the second output parameter includes: Wherein, P is the active power parameter, U1 is the first amplitude of the first energy storage module to be tested, U2 is the second amplitude of the second energy storage module, L s is the inductance value; δ is the second phase of the second energy storage module, and ω is the angular frequency of the power grid.

8. The method according to claim 6, wherein The calculating the reactive power parameter based on the first output parameter and the second output parameter includes: Wherein, Q is the reactive power parameter, U1 is the first amplitude of the first energy storage module to be tested, U2 is the second amplitude of the second energy storage module, L s is the inductance value; δ is the second phase of the second energy storage module, and ω is the angular frequency of the power grid.

9. A test device for an energy storage system, characterized in that, The device includes: A response generation module, configured to generate a first electrical energy parameter of a first energy storage module to be tested and a second electrical energy parameter of a second energy storage module in response to a preset power parameter input by a user, where the preset power parameter represents an operating condition of the energy storage system; A test module, configured to test the first energy storage module to be tested and / or the second energy storage module based on the first electrical energy parameter and the second electrical energy parameter, and obtain a test result.

10. A computer-readable storage medium, characterized in that, Computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are executed by a processor, the testing method of the energy storage system according to any one of claims 4-8 is implemented.

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