A method and system for testing charge and discharge response time and adjustment time of an electrochemical energy storage device

Abstract

The present invention discloses a method and system for testing the charge and discharge response time and adjustment time of an electrochemical energy storage device. The method includes collecting the current and voltage signals of the electrochemical energy storage grid connection point at high frequency to convert the charge and discharge power of the energy storage; connecting one pair of contacts of a double-circuit circuit breaker to a signal acquisition system to collect the signals as a switch quantity; connecting the other pair of contacts of the double-circuit circuit breaker to an energy control unit of the electrochemical energy storage device to serve as a control signal for the energy storage device; closing the double-circuit switch to start the test, using the closing signal of the switch quantity as the start time of the energy storage device receiving the control signal to derive the charge and discharge response time and adjustment time of the electrochemical energy storage device; utilizing the simultaneous opening and closing characteristics of the double-circuit circuit breaker, the closing time point of the switch quantity signal coincides with the time when the energy storage device receives the control signal. This avoids the time-consuming process of consulting the instruction message of the energy management system of the energy storage device in previous tests. It also improves the precision and accuracy of the recorded time.

Description

Technical Field

[0001] The present invention relates to a method and system for testing the charge and discharge response time and adjustment time of an electrochemical energy storage device, and belongs to the field of electrochemical energy storage. Background Art

[0002] In recent years, renewable energy power generation has rapidly developed, with installed capacity continuously increasing. The proportion of conventional thermal and hydropower has gradually decreased. Thermal power's function is gradually shifting from power supply to primarily providing auxiliary services such as frequency regulation and peak load regulation. Energy storage, as an effective technology for improving the grid's ability to instantly absorb renewable energy, can maximize the value of both when combined with optimized thermal power configurations. To ensure the safe and stable operation of the grid under a high proportion of renewable energy and promote the sustainable and healthy development of renewable energy, thermal power companies across the country are researching and planning various types of energy storage. Electrochemical energy storage technology, with its advantages of fast response (millisecond-level), independent regulation of active and reactive power, wide site selection, short construction period, and easy expansion, has become a preferred form of energy storage.

[0003] To meet the needs of modern large-scale power grid operation and management, promote the development of energy storage technology and network-source coordination, ensure the safe, orderly, and standardized grid connection of energy storage devices, and verify that the various grid-connected performance characteristics of energy storage devices meet regulatory requirements, grid connection testing of electrochemical energy storage devices is essential. Among these, charge and discharge response time and adjustment time are mandatory test items. Current test methods make it difficult to accurately measure these two times. Firstly, recording the moment when the energy storage device receives the control signal requires consulting the command message from the energy storage device's energy management system. This complex number of messages, with multiple messages possible at the same time, makes retrieval cumbersome. Secondly, time accuracy is uncontrollable and cannot reach the millisecond level required by the test. Summary of the Invention

[0004] The present invention provides a method and system for testing the charge and discharge response time and adjustment time of an electrochemical energy storage device, which solves the problem that it is difficult to record the time when the energy storage device receives the control signal during the charge and discharge response time and adjustment time tests of the electrochemical energy storage device. The existing method is cumbersome to operate and the time accuracy does not meet the test requirements.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A method for testing the charge and discharge response time and adjustment time of an electrochemical energy storage device, characterized by: collecting current signals and voltage signals of a grid-connected point of the electrochemical energy storage device through a signal acquisition system, and converting the current signals and voltage signals into the charge and discharge power of the electrochemical energy storage device;

[0007] Connect one of the contacts of the double-circuit circuit breaker to the signal acquisition system to collect the switching value;

[0008] Connecting the other pair of contacts of the double-circuit circuit breaker to the energy control unit of the electrochemical energy storage device as a control signal of the electrochemical energy storage device;

[0009] The moment when the double-circuit circuit breaker is closed and the electrochemical energy storage device receives the control signal is t c The moment when the charge / discharge power of the electrochemical energy storage device first reaches 90% of the rated power is recorded as t1; the starting moment when the deviation of the charge / discharge power of the electrochemical energy storage device is maintained within ±2% of the rated power is recorded as t2;

[0010] Electrochemical energy storage device charge / discharge response time = t1-t c ;

[0011] Electrochemical energy storage device charge / discharge adjustment time = t2-t c .

[0012] Furthermore: the current direction of the electrochemical energy storage grid connection point is defined as negative during charging and positive during discharging. The converted power is also negative during charging and positive during discharging.

[0013] Furthermore: the double-circuit circuit breaker controls two pairs of contacts to close or open simultaneously.

[0014] Furthermore, the energy control unit of the electrochemical energy storage device presets a power target value, and upon receiving a control signal from the dual-circuit circuit breaker, the electrochemical energy storage device performs charging and discharging operations according to the target value.

[0015] Accordingly, a test system for the charge and discharge response time and regulation time of an electrochemical energy storage device includes: a signal acquisition system, a two-way circuit breaker, and an energy storage device energy control unit; the signal acquisition system is provided with a current acquisition module for acquiring the current signal of the electrochemical energy storage device's grid connection point; the signal acquisition system is provided with a voltage acquisition module for acquiring the voltage signal of the electrochemical energy storage device's grid connection point; the charge and discharge power of the electrochemical energy storage device is calculated by converting the current signal and the voltage signal; the signal acquisition system is provided with a switch quantity acquisition module, and the switch quantity acquisition module is provided with a pair of contacts of the two-way circuit breaker for acquiring switch quantities; the other pair of contacts of the two-way circuit breaker is connected to the electrochemical energy storage device energy control unit as a control signal for the electrochemical energy storage device;

[0016] The moment when the double-circuit circuit breaker is closed and the electrochemical energy storage device receives the control signal is t c The moment when the charge / discharge power of the electrochemical energy storage device first reaches 90% of the rated power is recorded as t1; the starting moment when the deviation of the charge / discharge power of the electrochemical energy storage device is maintained within ±2% of the rated power is recorded as t2;

[0017] Electrochemical energy storage device charge / discharge response time = t1-t c;

[0018] Electrochemical energy storage device charge / discharge adjustment time = t2-t c .

[0019] Furthermore: the current direction of the electrochemical energy storage grid-connected point in the current acquisition module is defined as negative during charging and positive during discharging, and the converted power is also negative during charging and positive during discharging.

[0020] Furthermore: the dual-circuit circuit breaker controls the two pairs of contacts to close or open at the same time, and the switch quantity acquisition module is provided with a 48V query voltage device for judging whether the circuit is on or off.

[0021] Furthermore: the energy control unit of the electrochemical energy storage device presets a power target value, and when receiving a control signal from the dual-circuit circuit breaker, the electrochemical energy storage device performs charging and discharging operations according to the target value.

[0022] Accordingly, a computer-readable storage medium storing one or more programs is provided, wherein the one or more programs include instructions, which, when executed by a computing device, cause the computing device to perform any one of the above methods.

[0023] Accordingly, a computing device is characterized by comprising:

[0024] One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, and the one or more programs include instructions for performing any of the methods described above.

[0025] The beneficial effects achieved by the present invention are:

[0026] By leveraging the simultaneous opening and closing properties of dual-circuit circuit breakers, the closing time of the switch signal received by the acquisition device coincides with the time the energy storage device receives the control signal. This eliminates the time-consuming process of reviewing command messages from the energy storage device's energy management system, a process previously associated with testing. This also improves the precision and accuracy of recorded time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0029] like Figure 1As shown, a test system for the charge and discharge response time and adjustment time of an electrochemical energy storage device of the present invention includes: a signal acquisition system, a two-way circuit breaker and an energy storage device energy control unit; the signal acquisition system is provided with a current acquisition module for acquiring the current signal of the electrochemical energy storage device grid connection point; the signal acquisition system is provided with a voltage acquisition module for acquiring the voltage signal of the electrochemical energy storage device grid connection point; the charge and discharge power of the electrochemical energy storage device is calculated by converting the current signal and the voltage signal; the signal acquisition system is provided with a switch quantity acquisition module, a switch quantity acquisition module of a pair of contacts of the two-way circuit breaker, for acquiring switch quantities; the other pair of contacts of the two-way circuit breaker is connected to the electrochemical energy storage device energy control unit as a control signal of the electrochemical energy storage device;

[0030] During the test, the double-circuit circuit breaker is closed and the moment when the electrochemical energy storage device receives the control signal is recorded as t c The moment when the charge / discharge power of the electrochemical energy storage device first reaches 90% of the rated power is recorded as t1; the starting moment when the deviation of the charge / discharge power of the electrochemical energy storage device is maintained within ±2% of the rated power is recorded as t2;

[0031] Electrochemical energy storage device charge / discharge response time = t1-t c ;

[0032] Electrochemical energy storage device charge / discharge adjustment time = t2-t c .

[0033] Among them, the energy control unit of the electrochemical energy storage needs to preset the power target value. When receiving the control signal from the double-circuit circuit breaker, the energy storage device performs charging and discharging actions according to the target value.

[0034] Due to the characteristics of the dual-circuit circuit breakers opening and closing at the same time, the closing time point of the switch signal recorded by the acquisition system is consistent with the time when the energy storage device receives the control signal.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0036] A computer-readable storage medium storing one or more programs, wherein the one or more programs include instructions. When executed by a computing device, the instructions cause the computing device to perform a method for testing the charge and discharge response time and adjustment time of an electrochemical energy storage device.

[0037] A computing device includes one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and are configured to be executed by the one or more processors, and the one or more programs include instructions for executing a method for testing the charge and discharge response time and adjustment time of an electrochemical energy storage device.

[0038] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0039] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or 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, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0040] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0041] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0042] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A method for testing the charge and discharge response time and adjustment time of an electrochemical energy storage device, characterized by: The signal acquisition system collects the current signal and voltage signal of the grid connection point of the electrochemical energy storage device, and converts the current signal and voltage signal into the charge and discharge power of the electrochemical energy storage device; Connect one of the contacts of the double-circuit circuit breaker to the signal acquisition system to collect the switching value; Connecting the other pair of contacts of the double-circuit circuit breaker to the energy control unit of the electrochemical energy storage device as a control signal of the electrochemical energy storage device; The moment when the double-circuit circuit breaker is closed and the electrochemical energy storage device receives the control signal is t c The moment when the charge / discharge power of the electrochemical energy storage device first reaches 90% of the rated power is recorded as t1; the starting moment when the deviation of the charge / discharge power of the electrochemical energy storage device is maintained within ±2% of the rated power is recorded as t2; Electrochemical energy storage device charge / discharge response time = t1-t c ; Electrochemical energy storage device charge / discharge adjustment time = t2-t c .

2. A method for testing charge and discharge response time and adjustment time of an electrochemical energy storage device according to claim 1, characterized in that: The current direction of the electrochemical energy storage grid connection point is defined as negative during charging and positive during discharging. The converted power is also negative during charging and positive during discharging.

3. The method for testing the charge-discharge response time and adjustment time of an electrochemical energy storage device according to claim 1, characterized in that: The double-circuit circuit breaker controls two pairs of contacts to close or open at the same time.

4. The method for testing the charge-discharge response time and adjustment time of an electrochemical energy storage device according to claim 1, characterized in that: The energy control unit of the electrochemical energy storage device presets a power target value. When it receives a control signal from the dual-circuit circuit breaker, the electrochemical energy storage device performs charging and discharging operations according to the target value.

5. A test system for charge and discharge response time and adjustment time of an electrochemical energy storage device, characterized in that: include: Signal acquisition system, dual-circuit circuit breaker and energy storage device energy control unit; The signal acquisition system is provided with a current acquisition module for acquiring the current signal of the grid-connected point of the electrochemical energy storage device; the signal acquisition system is provided with a voltage acquisition module for acquiring the voltage signal of the grid-connected point of the electrochemical energy storage device; the charge and discharge power of the electrochemical energy storage device is calculated by converting the current signal and the voltage signal; the signal acquisition system is provided with a switch quantity acquisition module, a switch quantity acquisition module for a pair of contacts of the double-circuit circuit breaker, for acquiring switch quantities; the other pair of contacts of the double-circuit circuit breaker is connected to the energy control unit of the electrochemical energy storage device as the control signal of the electrochemical energy storage device; The moment when the double-circuit circuit breaker is closed and the electrochemical energy storage device receives the control signal is t c The moment when the charge / discharge power of the electrochemical energy storage device first reaches 90% of the rated power is recorded as t1; the starting moment when the deviation of the charge / discharge power of the electrochemical energy storage device is maintained within ±2% of the rated power is recorded as t2; Electrochemical energy storage device charge / discharge response time = t1-t c ; Electrochemical energy storage device charge / discharge adjustment time = t2-t c .

6. A test system for charge-discharge response time and adjustment time of an electrochemical energy storage device according to claim 5, characterized in that: The current direction of the electrochemical energy storage grid-connected point in the current acquisition module is defined as negative during charging and positive during discharging. The converted power is also negative during charging and positive during discharging.

7. A test system for charge-discharge response time and adjustment time of an electrochemical energy storage device according to claim 5, characterized in that: The dual-circuit circuit breaker controls the two pairs of contacts to close or open at the same time. The switch quantity acquisition module is equipped with a 48V query voltage device to determine whether the circuit is on or off.

8. The test system for charge-discharge response time and adjustment time of an electrochemical energy storage device according to claim 5, characterized in that: The energy control unit of the electrochemical energy storage device presets a power target value. When it receives a control signal from the dual-circuit circuit breaker, the electrochemical energy storage device performs charging and discharging operations according to the target value.

9. A computer-readable storage medium storing one or more programs, characterized in that: The one or more programs include instructions that, when executed by a computing device, cause the computing device to perform any one of the methods according to claims 1 to 4 .

10. A computing device, characterized in that include: One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods according to claims 1 to 4.

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