A performance test system for energy storage power conversion system

Abstract

The invention discloses a performance test system for an energy storage power conversion system, and relates to the field of automated testing technology. The system comprises an architecture module, which is responsible for running an automated testing infrastructure that is configured, wherein the automated testing infrastructure comprises a cabinet and a pin-drop fixture, wherein the automated testing infrastructure is configured in such a way that the cabinet and the pin-drop fixture are connected via an aviation plug, an industrial computer is installed in the cabinet, and a switch is connected to one side of the industrial computer for communication; a test module, which is responsible for running a voltage test component, wherein the voltage test component is communicatively connected to a port of the switch, and the voltage signal is accurately measured and analyzed; a detection module, which is responsible for running an integrated multifunctional detection component, wherein the integrated multifunctional detection component performs a comprehensive detection on the performance of the energy storage power conversion system; and a control module, which is responsible for running a configured communication control relay board, wherein the communication control relay board comprises nine groups in total, and each group is respectively connected to a different type of test circuit.

Description

Technical Field

[0001] The invention relates to the technical field of automated testing, and in particular to a performance testing system for an energy storage power conversion system. Background Art

[0002] In recent years, with the accelerated pace of transformation of the global energy structure to renewable energy, energy storage technology has become an indispensable key link in the energy system. As an important bridge connecting renewable energy power generation and the power grid, the performance of the energy storage power conversion system directly affects the efficient utilization of energy and the stability of the energy storage power conversion system. To this end, domestic and foreign research institutions and enterprises have invested a lot of resources to improve the performance testing technology of energy storage power conversion systems. Traditional testing methods mostly rely on manual operation and simple instruments and equipment, which is not only time-consuming and labor-intensive, but also difficult to guarantee test accuracy and repeatability. In recent years, with the development of automated testing technology, especially the application of computer control systems, high-precision measurement equipment and intelligent data analysis algorithms, the performance testing of energy storage power conversion systems has gradually become automated and intelligent, greatly improving the efficiency and accuracy of testing. Summary of the invention

[0003] In view of the above existing problems, the present invention is proposed.

[0004] Therefore, the present invention provides a performance testing system for an energy storage power conversion system to solve the problem that existing energy storage power conversion systems often focus on testing a single function, only paying attention to the measurement of voltage and current, and lack the ability to comprehensively evaluate the comprehensive performance indicators of the energy storage power conversion system. Secondly, the integration between test components is not high, resulting in data transmission delays and signal attenuation during the test process, affecting the accuracy and reliability of the test results. When facing complex and changeable power conversion scenarios, existing testing methods lack flexible adaptive capabilities and cannot promptly identify and respond to sudden abnormal situations, resulting in test interruptions and test result failures. Finally, the real-time analysis of test data and the abnormal warning mechanism are not yet perfect, making it difficult to discover and handle potential system failures in the first place, thereby reducing the overall efficiency of the energy storage power conversion system.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a performance test system for an energy storage power conversion system, which includes: the architecture module is responsible for running a configured automated test infrastructure, the automated test infrastructure includes a cabinet and a needle fixture, the automated test infrastructure is configured in such a way that the cabinet and the needle fixture are connected via an aviation plug, an industrial computer is installed in the cabinet, and a switch is connected to the industrial computer on one side for communication;

[0007] The test module is responsible for running a voltage test component, which is connected to the port of the switch for communication and accurately measuring and analyzing voltage signals;

[0008] The voltage test component includes DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope;

[0009] Among them, the DMM1 voltage test module and the DMM2 voltage test module are used to measure the DC and AC voltages in the energy storage power conversion system respectively;

[0010] OSC oscilloscope is used to capture the transient characteristics of voltage waveform;

[0011] Connect the DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope to the first three ports of the switch respectively, and use the Ethernet interface to seamlessly connect the DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope to the industrial computer;

[0012] Before testing the voltage test assembly, select an internationally recognized standard voltage source and standard resistor for calibration, and use the zero-point calibration method to independently calibrate each module of the voltage test assembly;

[0013] During data transmission, the signal integrity correction factor SIC is introduced to compensate for signal loss in the transmission path. At the same time, the signal-to-noise ratio SNR is introduced as an indicator to measure signal quality.

[0014] The performance of the voltage test component is evaluated as follows:

[0015] ;

[0016] in, Indicates the effectiveness coefficient of the voltage test component, Indicates the actual measured voltage value, Indicates the reference voltage value, is the signal integrity correction factor, is the signal-to-noise ratio;

[0017] The detection module is responsible for running the integrated multifunctional detection component, which performs a comprehensive detection on the performance of the energy storage power conversion system;

[0018] The multifunctional detection component is a ZLAN serial port server, which is connected to a DC high voltage power supply test module, a DC test module, an MTK chip and nine communication control relay boards;

[0019] Connect the ZLAN serial port server to a port of the switch in the cabinet, convert the serial data into Ethernet data, and connect the DC high-voltage power supply test module, DC test module, MTK chip and communication control relay board to the industrial computer for communication through Ethernet;

[0020] The DC high-voltage power supply test module is connected to the second port of the ZLAN serial port server to detect the stability and reliability of the high-voltage power supply in the energy storage power conversion system. A voltage fluctuation correction factor VFC is introduced to compensate for the test error caused by power supply fluctuation. The calculation formula of VFC is:

[0021] ;

[0022] Among them, △V represents the fluctuation amplitude of power supply voltage. Indicates rated voltage;

[0023] The DC test module is connected to the energy storage power conversion system through the third port of the ZLAN serial port server, and the ripple suppression factor RSF is introduced for correction. The calculation formula of RSF is:

[0024] ;

[0025] Among them, △I represents the current ripple amplitude, Indicates the average value of DC current;

[0026] The MTK chip is connected to the energy storage power conversion system through the fourth port of the ZLAN serial port server, and the data processing efficiency factor DPF is introduced. The calculation formula of DPF is:

[0027] ;

[0028] in, Indicates the data processing time, Indicates the total test time;

[0029] Connect nine groups of communication control relay boards to the corresponding ports of the ZLAN serial port server respectively, and introduce the communication control efficiency factor CCE. The calculation formula of CCE is:

[0030] ;

[0031] Among them, R i represents the failure probability of the i-th group of communication control relay boards;

[0032] The four factors of VFC, RSF, DPF and CCE are comprehensively evaluated to obtain the overall performance index OPM of the multifunctional detection component. The calculation formula of OPM is:

[0033] ;

[0034] The control module is responsible for running the configured communication control relay board, which has nine groups in total, each of which is connected to a different type of test circuit, covering a full range of performance indicators of the energy storage power conversion system;

[0035] The early warning module is responsible for real-time analysis of data and, if any abnormality is found, the early warning mechanism is activated;

[0036] The data recording module is responsible for collecting test data and storing it for a long time.

[0037] As a preferred solution of the energy storage power conversion system performance test system of the present invention, the specific steps of collecting test data and storing it for a long time are as follows:

[0038] The data recording module is connected to the test module to receive the test data generated during the test process;

[0039] The data recording module is connected to the detection module to record the detection data generated during the detection process.

[0040] As a preferred solution of the energy storage power conversion system performance test system of the present invention, wherein: the test data includes voltage, current and temperature;

[0041] The detection data includes voltage fluctuation amplitude, rated voltage, current ripple amplitude, DC current average value, data processing time and total test time.

[0042] As a preferred solution of the energy storage power conversion system performance test system of the present invention, the automated test infrastructure configuration mode is that the cabinet and the lower needle fixture are connected through an aviation plug, an industrial computer is installed in the cabinet, and a switch is connected to the industrial computer side for communication. The specific steps are:

[0043] Choose a switch with high-speed data transmission capability as the network hub, and use a standard Ethernet interface to connect the industrial computer and the switch;

[0044] The lower needle fixture is a combination of a fixture conductive seat, a positioning column, a conductive pin and an electrical conductive plug-in;

[0045] The cabinet is controlled and operated by 220V AC power. A safety switch is provided in the cabinet. The energy storage power conversion system is also equipped with a first DC power supply and a second DC power supply.

[0046] The stability of the test cabinet and the lower needle fixture is expressed as:

[0047] ;

[0048] in, represents the connection stability coefficient, represents the signal power, For connecting resistors, is the signal degradation rate.

[0049] As a preferred solution of the energy storage power conversion system performance test system of the present invention, wherein: the communication control relay board has a total of nine groups, each group is connected to a different type of test circuit, covering a full range of performance indicators of the energy storage power conversion system, and the specific steps are:

[0050] The power supply voltage test circuit is connected to the first group of communication control relay boards to monitor the stability of the power supply of the energy storage power conversion system and introduce the power supply fluctuation adaptability factor PVAF. The calculation formula of PVAF is:

[0051] ;

[0052] Among them, V t represents the preset voltage fluctuation threshold, and σ represents the standard deviation of the fluctuation amplitude;

[0053] The second and third communication control relay boards are connected to the Hall current sensor and CT current sensor respectively, and the current measurement deviation correction factor IMCF is introduced. The calculation formula of IMCF is:

[0054] ;

[0055] in, Indicates the measured current value, Indicates the actual current value, represents the average value of the AC current, and δ represents the deviation sensitivity factor;

[0056] The fourth and fifth communication control relay boards are used for overcurrent protection and leakage current protection on the electronic side and stator side respectively. The protection response efficiency factor PRE is introduced. The calculation formula of PRE is:

[0057] ;

[0058] in, Indicates the actual response time, represents the expected response time, η represents the response time sensitivity factor;

[0059] The sixth communication control relay board is connected to the PT100 temperature sensor and the temperature sampling circuit to monitor the temperature change during the operation of the energy storage power conversion system. The temperature measurement stability factor TMSF is introduced. The calculation formula of TMSF is:

[0060] ;

[0061] Among them, △T represents the temperature fluctuation amplitude, represents the average temperature, ζ represents the temperature fluctuation sensitivity factor;

[0062] The seventh and eighth communication control relay boards are connected to the overcurrent protection and leakage current protection circuits on the machine-grid side, respectively, and the machine-grid side protection efficiency factor MPEF is introduced. The calculation formula of MPEF is:

[0063] ;

[0064] Among them, K and J are index variables, indicating that counting starts from 1, corresponding to the Kth overcurrent protection circuit and the Jth leakage current protection circuit on the machine-grid side, respectively. and Respectively represent the protection response efficiency factor and the current measurement deviation correction factor of the two protection circuits;

[0065] The ninth group of communication control relay boards connects the DI circuit, IGBT-NTC sampling, PWM test, DO detection, encoder circuit test, power-off detection and NTC encoding detection circuits, and is used to comprehensively monitor the performance indicators of the energy storage power conversion system, and introduces the comprehensive circuit efficiency factor ICEF. The calculation formula of ICEF is:

[0066] ;

[0067] Where n is the number of test circuits, represents the performance of the kth test circuit, represents the maximum performance value, represents the efficacy sensitivity factor;

[0068] By comprehensively evaluating the six factors of PVAF, IMCF, PRE, TMSF, MPEF and ICEF, the comprehensive performance index CCI of the communication control relay board is obtained. The calculation formula of CCI is:

[0069] ;

[0070] Among them, θ represents the sensitivity factor of the comprehensive performance index.

[0071] As a preferred solution of the energy storage power conversion system performance test system of the present invention, the data is analyzed in real time, and if an abnormality is found, an early warning mechanism is activated. The specific steps are:

[0072] After completing the hardware configuration of the cabinet, needle clamp, voltage test component, multi-function detection component and communication control relay board, start the pre-written automated test program.

[0073] As a preferred solution of the energy storage power conversion system performance test system of the present invention, the automated test program runs as follows:

[0074] The automation procedure first initializes the energy storage power conversion system state;

[0075] The automated program calls the voltage test component and starts to accurately measure the voltage signal of the energy storage power conversion system. The DC and AC voltages are continuously sampled through the DMM1 voltage test module and the DMM2 voltage test module respectively. At the same time, the OSC oscilloscope captures the voltage waveform. All data is transmitted to the industrial computer via Ethernet for real-time analysis.

[0076] The program starts current sampling and temperature monitoring at the same time. The Hall current sensor and CT current sensor monitor the current changes in the energy storage power conversion system respectively, and the PT100 temperature sensor continuously monitors the temperature of the energy storage power conversion system during operation;

[0077] The automated program activates the circuit protection function. By monitoring the circuit status in real time, once abnormal current and temperature are detected, the protection mechanism is immediately triggered to disconnect the circuit and issue a warning signal to prevent damage to the energy storage power conversion system.

[0078] The industrial computer receives and analyzes all test data in real time, and calculates seven factors of the voltage test component, including: effectiveness coefficient Pe, power supply fluctuation correction factor VFC, current measurement deviation correction factor IMCF, protection response efficiency factor PRE, temperature measurement stability factor TMSF, machine-grid side protection effectiveness factor MPEF and comprehensive circuit effectiveness factor ICEF;

[0079] Adopt anomaly detection algorithm, by comparing real-time data with the seven factors, when the data exceeds the preset safety range, the early warning mechanism is immediately activated;

[0080] After completing the test, the energy storage power conversion system automatically summarizes all test data and generates a detailed performance evaluation report based on the collected performance indicators.

[0081] In a second aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, wherein: when the computer program is executed by the processor, any step of the energy storage power conversion system performance test system described in the first aspect of the present invention is implemented.

[0082] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, any step of the energy storage power conversion system performance test system as described in the first aspect of the present invention is implemented.

[0083] The beneficial effects of the present invention are as follows: the present invention realizes comprehensive automated testing of the performance of the energy storage power conversion system by constructing a highly integrated automated testing architecture, combining high-precision voltage testing components, multi-functional detection components and intelligent data processing algorithms, thereby significantly improving the accuracy and efficiency of the test, and ensuring the long-term stable operation of the power conversion system, and belongs to the field of power electronics and automated testing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0085] Figure 1 This is a flow chart of the energy storage power conversion system performance test system in Example 1. DETAILED DESCRIPTION

[0086] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0087] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a performance test system for an energy storage power conversion system, comprising the following steps:

[0088] The architecture module S1 is responsible for running the configured automated test infrastructure, which includes a cabinet and a needle fixture. The automated test infrastructure is configured in such a way that the cabinet and the needle fixture are connected via an aviation plug, an industrial computer is installed in the cabinet, and a switch is connected to the industrial computer on one side for communication;

[0089] Choose a switch with high-speed data transmission capability as the network hub, and use a standard Ethernet interface to connect the industrial computer and the switch;

[0090] The lower needle fixture is a combination of a fixture conductive seat, a positioning column, a conductive pin and an electrical conductive plug-in;

[0091] The cabinet is controlled and operated by 220V AC power. A safety switch is provided in the cabinet. The energy storage power conversion system is also equipped with a first DC power supply and a second DC power supply.

[0092] The stability of the test cabinet and the lower needle fixture is expressed as:

[0093] ;

[0094] in, represents the connection stability coefficient, represents the signal power, For connecting resistors, is the signal degradation rate.

[0095] The test module S2 is responsible for running the voltage test component, which is connected to the port of the switch for accurate measurement and analysis of the voltage signal;

[0096] The voltage test component includes DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope;

[0097] Among them, the DMM1 voltage test module and the DMM2 voltage test module are used to measure the DC and AC voltages in the energy storage power conversion system respectively;

[0098] OSC oscilloscope is used to capture the transient characteristics of voltage waveform;

[0099] Connect the DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope to the first three ports of the switch respectively, and use the Ethernet interface to seamlessly connect the DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope to the industrial computer;

[0100] Before testing the voltage test assembly, select an internationally recognized standard voltage source and standard resistor for calibration, and use the zero-point calibration method to independently calibrate each module of the voltage test assembly;

[0101] During data transmission, the signal integrity correction factor SIC is introduced to compensate for signal loss in the transmission path. At the same time, the signal-to-noise ratio SNR is introduced as an indicator to measure signal quality.

[0102] The performance of the voltage test component is evaluated as follows:

[0103] ;

[0104] in, Indicates the effectiveness coefficient of the voltage test component, Indicates the actual measured voltage value, Indicates the reference voltage value, is the signal integrity correction factor, is the signal-to-noise ratio.

[0105] The detection module S3 is responsible for running the integrated multifunctional detection component, which performs a comprehensive detection on the performance of the energy storage power conversion system;

[0106] The multifunctional detection component is a ZLAN serial port server, which is connected to a DC high voltage power supply test module, a DC test module, an MTK chip and nine communication control relay boards;

[0107] Connect the ZLAN serial port server to a port of the switch in the cabinet, convert the serial data into Ethernet data, and connect the DC high-voltage power supply test module, DC test module, MTK chip and communication control relay board to the industrial computer for communication through Ethernet;

[0108] The DC high-voltage power supply test module is connected to the second port of the ZLAN serial port server to detect the stability and reliability of the high-voltage power supply in the energy storage power conversion system. A voltage fluctuation correction factor VFC is introduced to compensate for the test error caused by power supply fluctuation. The calculation formula of VFC is:

[0109] ;

[0110] Among them, △V represents the fluctuation amplitude of power supply voltage. Indicates rated voltage;

[0111] The DC test module is connected to the energy storage power conversion system through the third port of the ZLAN serial port server, and the ripple suppression factor RSF is introduced for correction. The calculation formula of RSF is:

[0112] ;

[0113] Among them, △I represents the current ripple amplitude, Indicates the average value of DC current;

[0114] The MTK chip is connected to the energy storage power conversion system through the fourth port of the ZLAN serial port server, and the data processing efficiency factor DPF is introduced. The calculation formula of DPF is:

[0115] ;

[0116] in, Indicates the data processing time, Indicates the total test time;

[0117] Connect nine groups of communication control relay boards to the corresponding ports of the ZLAN serial port server respectively, and introduce the communication control efficiency factor CCE. The calculation formula of CCE is:

[0118] ;

[0119] Among them, R i represents the failure probability of the i-th group of communication control relay boards;

[0120] The four factors of VFC, RSF, DPF and CCE are comprehensively evaluated to obtain the overall performance index OPM of the multifunctional detection component. The calculation formula of OPM is:

[0121] .

[0122] The control module S4 is responsible for operating the configured communication control relay board, which has nine groups in total, each of which is connected to a different type of test circuit, covering a full range of performance indicators of the energy storage power conversion system;

[0123] The power supply voltage test circuit is connected to the first group of communication control relay boards to monitor the stability of the power supply of the energy storage power conversion system and introduce the power supply fluctuation adaptability factor PVAF. The calculation formula of PVAF is:

[0124] ;

[0125] Among them, V t represents the preset voltage fluctuation threshold, and σ represents the standard deviation of the fluctuation amplitude;

[0126] The second and third communication control relay boards are connected to the Hall current sensor and CT current sensor respectively, and the current measurement deviation correction factor IMCF is introduced. The calculation formula of IMCF is:

[0127] ;

[0128] in, Indicates the measured current value, Indicates the actual current value, represents the average value of the AC current, and δ represents the deviation sensitivity factor;

[0129] The fourth and fifth communication control relay boards are used for overcurrent protection and leakage current protection on the electronic side and stator side respectively. The protection response efficiency factor PRE is introduced. The calculation formula of PRE is:

[0130] ;

[0131] in, Indicates the actual response time, represents the expected response time, η represents the response time sensitivity factor;

[0132] The sixth communication control relay board is connected to the PT100 temperature sensor and the temperature sampling circuit to monitor the temperature change during the operation of the energy storage power conversion system. The temperature measurement stability factor TMSF is introduced. The calculation formula of TMSF is:

[0133] ;

[0134] Among them, △T represents the temperature fluctuation amplitude, represents the average temperature, ζ represents the temperature fluctuation sensitivity factor;

[0135] The seventh and eighth communication control relay boards are connected to the overcurrent protection and leakage current protection circuits on the machine-grid side, respectively, and the machine-grid side protection efficiency factor MPEF is introduced. The calculation formula of MPEF is:

[0136] ;

[0137] Among them, K and J are index variables, indicating that counting starts from 1, corresponding to the Kth overcurrent protection circuit and the Jth leakage current protection circuit on the machine-grid side, respectively. and Respectively represent the protection response efficiency factor and the current measurement deviation correction factor of the two protection circuits;

[0138] The ninth group of communication control relay boards connects the DI circuit, IGBT-NTC sampling, PWM test, DO detection, encoder circuit test, power-off detection and NTC encoding detection circuits, and is used to comprehensively monitor the performance indicators of the energy storage power conversion system, and introduces the comprehensive circuit efficiency factor ICEF. The calculation formula of ICEF is:

[0139] ;

[0140] Where n is the number of test circuits, represents the performance of the kth test circuit, represents the maximum performance value, represents the efficacy sensitivity factor;

[0141] By comprehensively evaluating the six factors of PVAF, IMCF, PRE, TMSF, MPEF and ICEF, the comprehensive performance index CCI of the communication control relay board is obtained. The calculation formula of CCI is:

[0142] ;

[0143] Among them, θ represents the sensitivity factor of the comprehensive performance index.

[0144] The early warning module described in S5 is responsible for real-time analysis of the data and, if an abnormality is found, the early warning mechanism is activated;

[0145] After completing the hardware configuration of the cabinet, needle clamp, voltage test component, multi-function detection component and communication control relay board, start the pre-written automated test program.

[0146] The data recording module described in S6 is responsible for collecting test data and storing it for a long time.

[0147] The data recording module is connected to the test module to receive the test data generated during the test process;

[0148] The data recording module is connected to the detection module to record the detection data generated during the detection process;

[0149] The detection data includes voltage fluctuation amplitude, rated voltage, current ripple amplitude, DC current average value, data processing time and total test time;

[0150] The automation procedure first initializes the energy storage power conversion system state;

[0151] The automated program calls the voltage test component and starts to accurately measure the voltage signal of the energy storage power conversion system. The DC and AC voltages are continuously sampled through the DMM1 voltage test module and the DMM2 voltage test module respectively. At the same time, the OSC oscilloscope captures the voltage waveform. All data is transmitted to the industrial computer via Ethernet for real-time analysis.

[0152] The program starts current sampling and temperature monitoring at the same time. The Hall current sensor and CT current sensor monitor the current changes in the energy storage power conversion system respectively, and the PT100 temperature sensor continuously monitors the temperature of the energy storage power conversion system during operation;

[0153] The automated program activates the circuit protection function. By monitoring the circuit status in real time, once abnormal current and temperature are detected, the protection mechanism is immediately triggered to disconnect the circuit and issue a warning signal to prevent damage to the energy storage power conversion system.

[0154] The industrial computer receives and analyzes all test data in real time, and calculates seven factors of the voltage test component, including: effectiveness coefficient Pe, power supply fluctuation correction factor VFC, current measurement deviation correction factor IMCF, protection response efficiency factor PRE, temperature measurement stability factor TMSF, machine-grid side protection effectiveness factor MPEF and comprehensive circuit effectiveness factor ICEF;

[0155] Adopt anomaly detection algorithm, by comparing real-time data with the seven factors, when the data exceeds the preset safety range, the early warning mechanism is immediately activated;

[0156] After completing the test, the energy storage power conversion system automatically summarizes all test data and generates a detailed performance evaluation report based on the collected performance indicators.

[0157] This embodiment also provides an energy storage power conversion system performance test system, including: an architecture module, a test module, a detection module, a control module and an early warning module;

[0158] The architecture module is responsible for building the automated test infrastructure consisting of industrial computers, switches, pin-drop fixtures, and aviation plugs, as well as real-time data transmission;

[0159] The test module is responsible for integrating the DMM1 voltage test module, the DMM2 voltage test module and the OSC oscilloscope to accurately measure and analyze the voltage signal of the energy storage power conversion system;

[0160] The detection module is responsible for connecting the DC high-voltage power supply test module, DC test module, MTK chip and communication control relay board through the ZLAN serial port server. This module is also responsible for calculating the overall performance index OPM and evaluating the performance of the multi-functional test component;

[0161] The control module is responsible for equipping nine groups of communication control relay boards, which respectively monitor the full range of performance indicators of power supply voltage stability, current change, overcurrent protection, temperature monitoring, and machine-grid side protection efficiency in real time, introduce a series of efficiency factors, and finally calculate the comprehensive efficiency index CCI to ensure that the protection function and overall performance of the circuit are in the best state;

[0162] The early warning module is responsible for receiving and analyzing the test data from other modules in real time and real-time monitoring of the circuit protection performance. Through the abnormal detection algorithm, once the data is found to be beyond the safe range, the early warning mechanism is immediately activated, and measures such as sound and light alarm, stopping the test, saving data and recording abnormal events are taken to effectively prevent the failure of the energy storage power conversion system and ensure the safety and efficiency of the test process.

[0163] This embodiment also provides a computer device, which is suitable for the case of an energy storage power conversion system performance test system, including: a memory and a processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the energy storage power conversion system performance test system proposed in the above embodiment.

[0164] The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covered on the display screen, or a key, trackball or touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0165] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the energy storage power conversion system performance test system proposed in the above embodiment is implemented; the storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, referred to as EPROM), programmable read-only memory (Programmable Red-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0166] In summary, the present invention achieves comprehensive automated testing of the performance of the energy storage power conversion system by: constructing a highly integrated automated testing architecture, combining high-precision voltage testing components, multi-functional detection components and intelligent data processing algorithms, significantly improving the accuracy and efficiency of the test, and ensuring the long-term stable operation of the power conversion system. It belongs to the field of power electronics and automated testing technology.

[0167] It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A performance test system for an energy storage power conversion system, characterized in that: include: Architecture module, test module, detection module, control module, warning module and data recording module; The architecture module is responsible for running the configured automated test infrastructure, which includes a cabinet and a needle clamp. The automated test infrastructure is configured in such a way that the cabinet and the needle clamp are connected via an aviation plug, an industrial computer is installed in the cabinet, and a switch is connected to the industrial computer on one side for communication; The test module is responsible for running a voltage test component, which is connected to the port of the switch for communication and accurately measuring and analyzing voltage signals; The voltage test component includes DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope; Among them, the DMM1 voltage test module and the DMM2 voltage test module are used to measure the DC and AC voltages in the energy storage power conversion system respectively; OSC oscilloscope is used to capture the transient characteristics of voltage waveform; Connect the DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope to the first three ports of the switch respectively, and use the Ethernet interface to seamlessly connect the DMM1 voltage test module, DMM2 voltage test module and OSC oscilloscope to the industrial computer; Before testing the voltage test assembly, select an internationally recognized standard voltage source and standard resistor for calibration, and use the zero-point calibration method to independently calibrate each module of the voltage test assembly; During data transmission, the signal integrity correction factor SIC is introduced to compensate for signal loss in the transmission path. At the same time, the signal-to-noise ratio SNR is introduced as an indicator to measure signal quality. The performance of the voltage test component is evaluated as follows: ； in, Indicates the effectiveness coefficient of the voltage test component, Indicates the actual measured voltage value, Indicates the reference voltage value, is the signal integrity correction factor, is the signal-to-noise ratio; The detection module is responsible for running the integrated multifunctional detection component, which performs a comprehensive detection on the performance of the energy storage power conversion system; The multifunctional detection component is a ZLAN serial port server, which is connected to a DC high voltage power supply test module, a DC test module, an MTK chip and nine communication control relay boards; Connect the ZLAN serial port server to a port of the switch in the cabinet, convert the serial data into Ethernet data, and connect the DC high-voltage power supply test module, DC test module, MTK chip and communication control relay board to the industrial computer for communication through Ethernet; The DC high-voltage power supply test module is connected to the second port of the ZLAN serial port server to detect the stability and reliability of the high-voltage power supply in the energy storage power conversion system. A voltage fluctuation correction factor VFC is introduced to compensate for the test error caused by power supply fluctuation. The calculation formula of VFC is: ； Among them, △V represents the fluctuation amplitude of power supply voltage. Indicates rated voltage; The DC test module is connected to the energy storage power conversion system through the third port of the ZLAN serial port server, and the ripple suppression factor RSF is introduced for correction. The calculation formula of RSF is: ； Among them, △I represents the current ripple amplitude, Indicates the average value of DC current; The MTK chip is connected to the energy storage power conversion system through the fourth port of the ZLAN serial port server, and the data processing efficiency factor DPF is introduced. The calculation formula of DPF is: ； in, Indicates the data processing time, Indicates the total test time; Connect nine groups of communication control relay boards to the corresponding ports of the ZLAN serial port server respectively, and introduce the communication control efficiency factor CCE. The calculation formula of CCE is: ； Among them, R i represents the failure probability of the i-th group of communication control relay boards; The four factors of VFC, RSF, DPF and CCE are comprehensively evaluated to obtain the overall performance index OPM of the multifunctional detection component. The calculation formula of OPM is: ； The control module is responsible for operating the configured communication control relay board, which has nine groups in total, each of which is connected to a different type of test circuit, covering a full range of performance indicators of the energy storage power conversion system; The early warning module is responsible for real-time analysis of data and, if any abnormality is found, the early warning mechanism is activated; The data recording module is responsible for collecting test data and storing it for a long time.

2. The energy storage power conversion system performance test system according to claim 1, characterized in that: The specific steps of collecting test data and storing it for a long time are as follows: The data recording module is connected to the test module to receive the test data generated during the test process; The data recording module is connected to the detection module to record the detection data generated during the detection process.

3. The energy storage power conversion system performance test system according to claim 2, characterized in that: The test data includes voltage, current and temperature; The detection data includes voltage fluctuation amplitude, rated voltage, current ripple amplitude, DC current average value, data processing time and total test time.

4. The energy storage power conversion system performance test system according to claim 3, characterized in that: The configuration mode of the automated test infrastructure is that the cabinet and the lower needle fixture are connected through an aviation plug, an industrial computer is installed in the cabinet, and a switch is connected to the industrial computer side for communication. The specific steps are as follows: Choose a switch with high-speed data transmission capability as the network hub, and use a standard Ethernet interface to connect the industrial computer and the switch; The lower needle fixture is a combination of a fixture conductive seat, a positioning column, a conductive pin and an electrical conductive plug-in; The cabinet is controlled and operated by 220V AC power. A safety switch is provided in the cabinet. The energy storage power conversion system is also equipped with a first DC power supply and a second DC power supply. The stability of the test cabinet and the lower needle fixture is expressed as: ； in, represents the connection stability coefficient, represents the signal power, For connecting resistors, is the signal degradation rate.

5. The energy storage power conversion system performance test system according to claim 4, characterized in that: There are a total of nine groups of communication control relay boards, each of which is connected to different types of test circuits, covering a full range of performance indicators of the energy storage power conversion system. The specific steps are as follows: The power supply voltage test circuit is connected to the first group of communication control relay boards to monitor the stability of the power supply of the energy storage power conversion system and introduce the power supply fluctuation adaptability factor PVAF. The calculation formula of PVAF is: ； Among them, V t represents the preset voltage fluctuation threshold, and σ represents the standard deviation of the fluctuation amplitude; The second and third communication control relay boards are connected to the Hall current sensor and CT current sensor respectively, and the current measurement deviation correction factor IMCF is introduced. The calculation formula of IMCF is: ； in, Indicates the measured current value, Indicates the actual current value, represents the average value of the AC current, and δ represents the deviation sensitivity factor; The fourth and fifth communication control relay boards are used for overcurrent protection and leakage current protection on the electronic side and stator side respectively. The protection response efficiency factor PRE is introduced. The calculation formula of PRE is: ； in, Indicates the actual response time, represents the expected response time, η represents the response time sensitivity factor; The sixth communication control relay board is connected to the PT100 temperature sensor and the temperature sampling circuit to monitor the temperature change during the operation of the energy storage power conversion system. The temperature measurement stability factor TMSF is introduced. The calculation formula of TMSF is: ； Among them, △T represents the temperature fluctuation amplitude, represents the average temperature, ζ represents the temperature fluctuation sensitivity factor; The seventh and eighth communication control relay boards are connected to the overcurrent protection and leakage current protection circuits on the machine-grid side, respectively, and the machine-grid side protection efficiency factor MPEF is introduced. The calculation formula of MPEF is: ； Among them, K and J are index variables, indicating that counting starts from 1, corresponding to the Kth overcurrent protection circuit and the Jth leakage current protection circuit on the machine-grid side, respectively. and Respectively represent the protection response efficiency factor and the current measurement deviation correction factor of the two protection circuits; The ninth group of communication control relay boards connects the DI circuit, IGBT-NTC sampling, PWM test, DO detection, encoder circuit test, power-off detection and NTC encoding detection circuits, and is used to comprehensively monitor the performance indicators of the energy storage power conversion system, and introduces the comprehensive circuit efficiency factor ICEF. The calculation formula of ICEF is: ； Where n is the number of test circuits, represents the performance of the kth test circuit, represents the maximum performance value, represents the efficacy sensitivity factor; By comprehensively evaluating the six factors of PVAF, IMCF, PRE, TMSF, MPEF and ICEF, the comprehensive performance index CCI of the communication control relay board is obtained. The calculation formula of CCI is: ； Among them, θ represents the sensitivity factor of the comprehensive performance index.

6. The energy storage power conversion system performance test system according to claim 5, characterized in that: The data is analyzed in real time, and if an abnormality is found, an early warning mechanism is activated. The specific steps are as follows: After completing the hardware configuration of the cabinet, needle clamp, voltage test component, multi-function detection component and communication control relay board, start the pre-written automated test program.

7. The energy storage power conversion system performance test system according to claim 6, characterized in that: The automated test program runs as follows: The automation procedure first initializes the energy storage power conversion system state; The automated program calls the voltage test component and starts to accurately measure the voltage signal of the energy storage power conversion system. The DC and AC voltages are continuously sampled through the DMM1 voltage test module and the DMM2 voltage test module respectively. At the same time, the OSC oscilloscope captures the voltage waveform. All data is transmitted to the industrial computer via Ethernet for real-time analysis. The program starts current sampling and temperature monitoring at the same time. The Hall current sensor and CT current sensor monitor the current changes in the energy storage power conversion system respectively, and the PT100 temperature sensor continuously monitors the temperature of the energy storage power conversion system during operation; The automated program activates the circuit protection function. By monitoring the circuit status in real time, once abnormal current and temperature are detected, the protection mechanism is immediately triggered to disconnect the circuit and issue a warning signal to prevent damage to the energy storage power conversion system. The industrial computer receives and analyzes all test data in real time, and calculates seven factors of the voltage test component, including: effectiveness coefficient Pe, power supply fluctuation correction factor VFC, current measurement deviation correction factor IMCF, protection response efficiency factor PRE, temperature measurement stability factor TMSF, machine-grid side protection effectiveness factor MPEF and comprehensive circuit effectiveness factor ICEF; Adopt anomaly detection algorithm, by comparing real-time data with the seven factors, when the data exceeds the preset safety range, the early warning mechanism is immediately activated; After completing the test, the energy storage power conversion system automatically summarizes all test data and generates a detailed performance evaluation report based on the collected performance indicators.

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