Supercapacitor energy storage system test platform and test method

Abstract

The present invention provides a supercapacitor energy storage system test platform and test method, including a first supercapacitor energy storage system, a load device, a four-quadrant converter, a console and an input power supply, the console controls the discharge of the first supercapacitor energy storage system, and controls the load device to absorb the electric energy released by the first supercapacitor energy storage system. The console is also used to collect a first test parameter of the first supercapacitor energy storage system and a second test parameter of the load device during the test, obtain a first test result of the first supercapacitor energy storage system according to the first test parameter, and obtain a second test result of the load device according to the second test parameter, thereby realizing a comprehensive test of the supercapacitor energy storage system when charging or discharging.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of electrical technology, and in particular to a supercapacitor energy storage system testing platform and testing method. Background Art

[0002] With the development of urbanization, cities are getting bigger and bigger. In order to ease urban traffic congestion, improve urban living environment and promote sustainable urban development, urban rail transit is becoming the basic means of transportation in large cities. Urban rail transit includes: subway system, light rail system, monorail system, tram, maglev system, automatic guided rail system and urban rapid rail system.

[0003] In the prior art, a supercapacitor energy storage system is usually added to the urban rail transit system to store the train braking energy for use during train traction, which not only saves energy but also helps maintain the stability of the grid voltage, such as the urban rail transit supercapacitor energy storage system disclosed in (CN208806623U). Before deploying the supercapacitor energy storage system to the urban rail transit system, it is necessary to conduct a comprehensive test on the supercapacitor energy storage system. Only after passing the comprehensive test can the supercapacitor energy storage system be deployed to the urban rail transit system to ensure that the supercapacitor energy storage system can work safely and reliably.

[0004] However, existing supercapacitor energy storage systems lack a method for comprehensive testing while charging or discharging. Summary of the invention

[0005] The embodiments of the present invention provide a supercapacitor energy storage system test platform and a test method to overcome the problem that the existing supercapacitor energy storage system lacks a comprehensive test method during charging or discharging.

[0006] On the one hand, the present invention provides a supercapacitor energy storage system testing platform.

[0007] It includes a first supercapacitor energy storage system, a load device, a four-quadrant converter, a control console and an input power supply;

[0008] The input power supply is connected to the four-quadrant converter; the input power supply is used to provide power for the four-quadrant converter;

[0009] The first supercapacitor energy storage system and the load device are respectively connected to the output end of the four-quadrant converter;

[0010] The four-quadrant converter is used for mutual conversion between alternating current and direct current;

[0011] The console is connected to the first supercapacitor energy storage system and the load device respectively, and is used to control the discharge of the first supercapacitor energy storage system and control the load device to absorb the electric energy released by the first supercapacitor energy storage system. The console is also used to collect a first test parameter of the first supercapacitor energy storage system and a second test parameter of the load device during the test, obtain a first test result of the first supercapacitor energy storage system according to the first test parameter, and obtain a second test result of the load device according to the second test parameter.

[0012] Optionally, the first supercapacitor energy storage system comprises: a first supercapacitor cabinet and a first converter cabinet;

[0013] The control console is connected to the first converter cabinet.

[0014] Optionally, the first supercapacitor cabinet includes: a first display, a first supercapacitor controller and a first supercapacitor energy storage unit;

[0015] The first display is used to display the operating status and alarm information of the first supercapacitor cabinet, the first supercapacitor controller is used to adjust the voltage and temperature of the first supercapacitor energy storage unit, and the first supercapacitor energy storage unit is used to store electrical energy.

[0016] Optionally, the first converter cabinet includes: a first bidirectional direct current-direct current (DC-DC) controller and a first bidirectional DC-DC converter;

[0017] The first bidirectional DC-DC controller is used to control the first bidirectional DC-DC converter to charge and discharge.

[0018] Optionally, the four-quadrant converter is further used to: maintain the voltage at the output end of the four-quadrant converter as a first constant voltage;

[0019] When the discharge power of the first supercapacitor energy storage system is less than the charging power of the load device, the voltage at the output end of the four-quadrant converter is less than the first constant voltage, and the four-quadrant converter supplements the power difference between the charging power and the discharging power to maintain the voltage at the output end of the four-quadrant converter at the first constant voltage.

[0020] Optionally, the input power source is the power provided to the four-quadrant converter by a low-voltage power grid through a low-voltage power distribution cabinet and an isolation transformer.

[0021] Optionally, the console is a personal computer (PC), and the PC is connected to the first supercapacitor energy storage system and the load device respectively via Ethernet.

[0022] Optionally, the console is connected to the first converter cabinet, including:

[0023] The console is connected to the first bidirectional DC-DC controller.

[0024] Optionally, the load device is a second supercapacitor energy storage system, and the second supercapacitor energy storage system includes a second supercapacitor cabinet and a second converter cabinet.

[0025] Optionally, the console is also used to control the discharge of the second supercapacitor energy storage system and control the first supercapacitor energy storage system to absorb the electric energy released by the second supercapacitor energy storage system. The console is also used to collect a third test parameter of the second supercapacitor energy storage system and a fourth test parameter of the first supercapacitor energy storage system during the test, obtain a third test result of the second supercapacitor energy storage system according to the third test parameter, and obtain a fourth test result of the first supercapacitor energy storage system according to the fourth test parameter.

[0026] Optionally, a fifth test result of the first supercapacitor energy storage system is obtained according to the first test parameter and the fourth test parameter, wherein the fifth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment;

[0027] A sixth test result of the second supercapacitor energy storage system is obtained according to the second test parameter and the third test parameter, wherein the sixth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment.

[0028] On the other hand, the present invention also provides a supercapacitor energy storage system testing method, which is applied to a supercapacitor energy storage system testing platform, wherein the platform includes a first supercapacitor energy storage system, a load device, a four-quadrant converter, a console, and an input power supply:

[0029] The console sends a first configuration instruction to the first supercapacitor energy storage system, where the first configuration instruction is used to configure an initial voltage of the first supercapacitor energy storage system and to configure a state of the first supercapacitor energy storage system to a discharge-ready state;

[0030] The console sends a second configuration instruction to the load device, wherein the second configuration instruction is used to configure an initial voltage and an end voltage of the load device, configure a charging current of the load device to a first constant current, and configure a state of the load device to a charge-ready state;

[0031] The console sends a first control instruction to the first supercapacitor energy storage system, where the first control instruction is used to instruct the first supercapacitor energy storage system to start discharging;

[0032] The console sends a second control instruction to the load device, where the second control instruction is used to instruct the load device to start charging;

[0033] During the test, the console collects a first test parameter of the first supercapacitor energy storage system and a second test parameter of the load device, obtains a first test result of the first supercapacitor energy storage system according to the first test parameter, and obtains a second test result of the load device according to the second test parameter.

[0034] Optionally, it also includes:

[0035] The four-quadrant converter is further used to: maintain the voltage at the output end of the four-quadrant converter as a first constant voltage;

[0036] When the discharge power of the first supercapacitor energy storage system is less than the charging power of the load device, the voltage at the output end of the four-quadrant converter is less than the first constant voltage, and the four-quadrant converter supplements the power difference between the charging power and the discharging power to maintain the voltage at the output end of the four-quadrant converter at the first constant voltage.

[0037] Optionally, it also includes:

[0038] If the current voltage of the load device is the end voltage of the load device, the test is stopped.

[0039] Optionally, the second control instruction is generated according to a first charging current set by the load device;

[0040] The first control instruction is generated according to a first discharging current obtained from the first charging current.

[0041] Optionally, the first supercapacitor energy storage system includes a first supercapacitor cabinet and a first converter cabinet;

[0042] The collecting of the first test parameter of the first supercapacitor energy storage system during the discharge process of the first supercapacitor energy storage system includes:

[0043] During the discharge process of the first supercapacitor energy storage system, the first test parameter of the first supercapacitor cabinet is collected through the first converter cabinet.

[0044] Optionally, an initial voltage of the first supercapacitor energy storage system is greater than an initial voltage of the load device.

[0045] Optionally, the load device is a second supercapacitor energy storage system, and the second supercapacitor energy storage system includes a second supercapacitor cabinet and a second converter cabinet.

[0046] Optionally, the method further comprises:

[0047] The console sends a third configuration instruction to the second supercapacitor energy storage system, where the third configuration instruction is used to configure an initial voltage of the second supercapacitor energy storage system and to configure a state of the second supercapacitor energy storage system to a discharge-ready state;

[0048] The console sends a fourth configuration instruction to the first supercapacitor energy storage system, wherein the fourth configuration instruction is used to configure an initial voltage and an end voltage of the first supercapacitor energy storage system, and to configure a charging current of the first supercapacitor energy storage system to a second constant current, and to configure a state of the first supercapacitor energy storage system to a charge-ready state;

[0049] The console sends a third control instruction to the second supercapacitor energy storage system, wherein the third control instruction is used to instruct the second supercapacitor energy storage system to start discharging;

[0050] The console sends a fourth control instruction to the first supercapacitor energy storage system, where the fourth control instruction is used to instruct the first supercapacitor energy storage system to start charging;

[0051] During the test, the console collects a third test parameter of the second supercapacitor energy storage system and a fourth test parameter of the first supercapacitor energy storage system; obtains a third test result of the second supercapacitor energy storage system according to the third test parameter, and obtains a fourth test result of the first supercapacitor energy storage system according to the fourth test parameter.

[0052] Optionally, a fifth test result of the first supercapacitor energy storage system is obtained according to the first test parameter and the fourth test parameter, wherein the fifth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment;

[0053] A sixth test result of the second supercapacitor energy storage system is obtained according to the second test parameter and the third test parameter, wherein the sixth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment.

[0054] The supercapacitor energy storage system test platform and test method provided by the present invention include a first supercapacitor energy storage system, a load device, a four-quadrant converter, a console and an input power supply. The console controls the discharge of the first supercapacitor energy storage system and controls the load device to absorb the electric energy released by the first supercapacitor energy storage system. The console is also used to collect a first test parameter of the first supercapacitor energy storage system and a second test parameter of the load device during the test, obtain a first test result of the first supercapacitor energy storage system according to the first test parameter, and obtain a second test result of the load device according to the second test parameter, thereby realizing a comprehensive test of the supercapacitor energy storage system when charging or discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0056] Figure 1 A schematic diagram of a supercapacitor energy storage system test platform provided by the present invention;

[0057] Figure 2 It is a schematic diagram of another supercapacitor energy storage system test platform provided by the present invention;

[0058] Figure 3 This is a schematic diagram of another supercapacitor energy storage system test platform provided by the present invention;

[0059] Figure 4 It is a schematic diagram of a supercapacitor energy storage system testing method provided by the present invention;

[0060] Figure 5 It is a schematic diagram of another supercapacitor energy storage system testing method provided by the present invention;

[0061] Figure 6 It is a schematic diagram of another supercapacitor energy storage system testing method provided by the present invention. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] The supercapacitor energy storage system test platform and test method provided by the present invention include a first supercapacitor energy storage system, a load device, a four-quadrant converter, a console and an input power supply. The console controls the discharge of the first supercapacitor energy storage system and controls the load device to absorb the electric energy released by the first supercapacitor energy storage system. The console is also used to collect a first test parameter of the first supercapacitor energy storage system and a second test parameter of the load device during the test process, obtain a first test result of the first supercapacitor energy storage system according to the first test parameter, and obtain a second test result of the load device according to the second test parameter, thereby realizing a comprehensive test of the supercapacitor energy storage system when charging or discharging.

[0064] The technical solution of the present invention is described below in conjunction with several specific embodiments.

[0065] Figure 1 A schematic diagram of a supercapacitor energy storage system test platform provided by the present invention, such as Figure 1 As shown, including:

[0066] The first supercapacitor energy storage system, a load device, a four-quadrant converter, a control console and an input power supply.

[0067] The input power supply is connected to the four-quadrant converter, and the input power supply is used to provide power to the four-quadrant converter.

[0068] The first supercapacitor energy storage system and the load device are respectively connected to the output ends of the four-quadrant converter, and the four-quadrant converter is used for mutual conversion between alternating current and direct current.

[0069] The console is connected to the first supercapacitor energy storage system and the load device respectively. The console is used to control the discharge of the first supercapacitor energy storage system and control the load device to absorb the electric energy released by the first supercapacitor energy storage system. The console is also used to collect the first test parameter of the first supercapacitor energy storage system and the second test parameter of the load device during the test, obtain the first test result of the first supercapacitor energy storage system according to the first test parameter, and obtain the second test result of the load device according to the second test parameter.

[0070] The input power refers to an AC power supply, which may be an AC power supply with a voltage of 380V and a frequency of 50Hz input from a low-voltage power grid.

[0071] The input power supply is connected to the four-quadrant converter to provide power to the four-quadrant converter. At the same time, the four-quadrant converter converts the AC power provided by the input power supply into DC power and provides it to the first supercapacitor energy storage system and the load device at the output end of the four-quadrant converter.

[0072] The first supercapacitor energy storage system and the load device are respectively connected to the output end of the four-quadrant converter. A possible connection method is:

[0073] The first supercapacitor energy storage system and the load device are connected in parallel to the output end of the four-quadrant converter.

[0074] The console is connected to the first supercapacitor energy storage system and the load device respectively, and information flow can be transmitted through the connection. The specific connection method can be through Ethernet connection, or through other wired or wireless methods such as serial port, wireless Internet access (Wireless Fidelity, Wi-Fi) and Bluetooth.

[0075] The test process of the supercapacitor energy storage system test platform is as follows: first, the console controls the first supercapacitor energy storage system and the load device to charge to their respective configured initial voltages with a smaller power, and both the first supercapacitor energy storage system and the load device are charged through a four-quadrant converter and stop when their respective configured initial voltages are reached; secondly, the console controls the discharge of the first supercapacitor energy storage system and controls the charging of the load device, and the load device absorbs the electric energy released by the first supercapacitor energy storage system; finally, during the charging and discharging process, the console collects the first test parameters of the first supercapacitor energy storage system during discharge and the second test parameters of the load device during charging in real time, and obtains the first test result of the supercapacitor energy storage system and the second test result of the load device according to the first test parameters and the second test parameters, respectively.

[0076] The first test parameter includes a first instantaneous current, a first instantaneous voltage and a first ambient temperature when the first supercapacitor energy storage system is discharged.

[0077] The second test parameters include a second instantaneous current, a second instantaneous voltage, and a second ambient temperature when the energy storage device is charged.

[0078] The first test results include, but are not limited to, power assessment of the first supercapacitor energy storage system during discharge, current and voltage ripple rate assessment during discharge, and ambient temperature assessment during discharge.

[0079] The calculation formula for the power assessment during discharge in the first test result is as follows (1):

[0080] P(t)=u(t)×i(t) (1)

[0081] Wherein, during discharge, P(t) is the discharge power at time t, u(t) is the first instantaneous voltage at time t, and i(t) is the first instantaneous current at time t;

[0082] The calculation formulas for the current and voltage ripple rate assessment during discharge in the first test result are as follows (2):

[0083]

[0084] Among them, ΔI% and ΔU% are the current ripple rate and voltage ripple rate respectively; ΔI and ΔU are the current ripple peak-to-peak value and voltage ripple peak-to-peak value respectively; I0 and U0 are the current average value and voltage average value respectively; ΔI, ΔU, I0 and U0 can all be calculated from the first instantaneous voltage and the first instantaneous current. The specific calculation is the existing technology and will not be repeated here.

[0085] The method for evaluating the ambient temperature during discharge in the first test result is as follows:

[0086] An assessment of the ambient temperature during discharge is obtained according to the first ambient temperature.

[0087] The second test result includes, but is not limited to, power assessment of the load device during charging, current and voltage ripple rate assessment during charging, ambient temperature assessment during charging, and current and voltage error assessment during charging.

[0088] The calculation formula for the power assessment during charging in the second test result is as follows (3):

[0089] P(t)=u(t)×i(t) (3)

[0090] Wherein, during charging, P(t) is the charging power at time t, u(t) is the second instantaneous voltage at time t, and i(t) is the second instantaneous current at time t;

[0091] The calculation formulas for the current and voltage ripple rate assessment during charging in the second test result are as follows (4):

[0092]

[0093] Among them, ΔI% and ΔU% are the current ripple rate and voltage ripple rate respectively; ΔI and ΔU are the current ripple peak-to-peak value and voltage ripple peak-to-peak value respectively; I0 and U0 are the current average value and voltage average value respectively; ΔI, ΔU, I0 and U0 can all be calculated from the second instantaneous voltage and the second instantaneous current. The specific calculation is the existing technology and will not be repeated here.

[0094] The method for evaluating the ambient temperature during charging in the second test result is as follows:

[0095] The ambient temperature assessment during discharge is obtained according to the second ambient temperature.

[0096] The calculation formula for the current and voltage error assessment during charging in the second test result is as follows (5):

[0097]

[0098] Among them, I1 is the second instantaneous current, I2 is the first constant current, U1 is the second instantaneous voltage, and U2 is the first constant voltage.

[0099] The supercapacitor energy storage system test platform provided by the present invention obtains the comprehensive test result of the first supercapacitor energy storage system when discharging through the first test result. When the load device is the second supercapacitor energy storage system, the comprehensive test result of the second supercapacitor energy storage system when charging is obtained through the second test result. The first supercapacitor energy storage system and the second supercapacitor energy storage system have the same structure. Therefore, the present invention can realize the comprehensive test of the supercapacitor energy storage system when charging or discharging. In addition, by simultaneously connecting the supercapacitor energy storage system and the load device to the output end of the four-quadrant converter, during the discharge test of the first supercapacitor energy storage system, the load device absorbs the electric energy released by the first supercapacitor energy storage system to realize power circulation, reduce the requirements for the grid capacity, and save electric energy; and avoid directly acting the released electric energy on the AC grid, reducing the impact on the AC grid voltage during the test.

[0100] Figure 2 is a schematic diagram of another supercapacitor energy storage system test platform provided by the present invention, such as Figure 2 As shown,

[0101] The first supercapacitor energy storage system includes: a first supercapacitor cabinet and a first converter cabinet, and the control console is connected to the first converter cabinet.

[0102] The first supercapacitor cabinet has an independent product form and can be used alone. The first supercapacitor cabinet is used to store and release electrical energy. It has the advantages of fast charging speed, long cycle life, strong large current discharge capability, and high energy conversion rate.

[0103] The first converter cabinet has an independent product form and can be used alone. The first converter cabinet is used to control the charging and discharging of the first supercapacitor cabinet.

[0104] The console is connected to the first converter cabinet, which refers to the connection between the console and the first supercapacitor energy storage system, specifically, the connection with the first converter cabinet in the first supercapacitor energy storage system.

[0105] Optionally, the first supercapacitor cabinet includes: a first display, a first supercapacitor controller and a first supercapacitor energy storage unit.

[0106] The first display is used to display the operating status and alarm information of the first supercapacitor cabinet, the first supercapacitor controller is used to adjust the voltage and temperature of the first supercapacitor energy storage unit, and the first supercapacitor energy storage unit is used to store electrical energy.

[0107] Optionally, the first converter cabinet includes: a first bidirectional direct current (DC-DC) controller and a first bidirectional DC-DC converter.

[0108] The first bidirectional DC-DC controller is used to control the first bidirectional DC-DC converter to charge and discharge.

[0109] Optionally, the four-quadrant converter is further used to maintain the voltage at the output end of the four-quadrant converter as a first constant voltage.

[0110] When the discharge power of the first supercapacitor energy storage system is less than the charging power of the load device, the voltage at the output end of the four-quadrant converter is less than the first constant voltage, and the four-quadrant converter supplements the power difference between the charging power and the discharging power to maintain the voltage at the output end of the four-quadrant converter at the first constant voltage.

[0111] Maintaining the voltage at the output end of the four-quadrant converter at a first constant voltage, a possible implementation is: the four-quadrant converter adopts a voltage and current dual closed-loop control method to maintain the voltage at the output end at the first constant voltage. When the voltage decreases, the four-quadrant converter can automatically adjust the output power to maintain the voltage at the output end at the first constant voltage.

[0112] During the discharge of the first supercapacitor energy storage system and the charging of the load device, as time goes by, the maximum discharge power of the first supercapacitor energy storage system becomes smaller, and the power required for charging the load device becomes larger. When the maximum discharge power provided by the first supercapacitor energy storage system is less than the power required for charging the load device, the voltage at the output end of the four-quadrant converter is less than the first constant voltage. At this time, the four-quadrant converter can automatically adjust the output power to make up for the power difference between the power required for charging the load device and the discharge power of the first supercapacitor energy storage system, so as to maintain the voltage at the output end at the first constant voltage.

[0113] The first constant voltage may be DC1500V±20V or DC750V±20V.

[0114] The power difference between the charging power and the discharging power is supplemented by the four-quadrant converter to maintain the voltage at the output end of the four-quadrant converter as the first constant voltage, thereby broadening the test range of the first supercapacitor energy storage system.

[0115] Optionally, the input power is the power provided by the low-voltage power grid to the four-quadrant converter through a low-voltage power distribution cabinet and an isolation transformer.

[0116] The low-voltage distribution cabinet can protect the circuit and prevent damage to personnel and equipment. For example, the rated voltage of the low-voltage distribution cabinet is 380V and the frequency is 50Hz; the functions of the isolation transformer are mainly voltage transformation and isolation. For example, the capacity of the isolation transformer is 500kVA.

[0117] Optionally, the console is a PC, and the PC is connected to the first supercapacitor energy storage system and the load device respectively via Ethernet.

[0118] Users can make test plans and test schemes through PC.

[0119] Optionally, the console is connected to the first converter cabinet, specifically:

[0120] The console is connected to the first bidirectional DC-DC controller.

[0121] The specific connection method of the console and the first converter cabinet is that the console is connected to the first bidirectional DC-DC controller in the first converter cabinet.

[0122] Figure 3 Schematic diagram of another supercapacitor energy storage system test platform provided by the present invention, such as Figure 3 As shown,

[0123] The load device is a second supercapacitor energy storage system, and the second supercapacitor energy storage system includes a second supercapacitor cabinet and a second converter cabinet.

[0124] One possible implementation of the load device is that the load device is a second supercapacitor energy storage system. The second supercapacitor energy storage system can have the same structure as the first supercapacitor energy storage system. During the test, they are set to different working states. In the present invention, the first supercapacitor energy storage system is set to a discharging state, and the second supercapacitor energy storage system is set to a charging state.

[0125] The second supercapacitor cabinet includes: a second display, a second supercapacitor controller, and a second supercapacitor energy storage unit. The second display is the same as the first display in the first supercapacitor cabinet, the second supercapacitor controller is the same as the first supercapacitor controller in the first supercapacitor cabinet, and the second supercapacitor energy storage unit is the same as the first supercapacitor energy storage unit in the first supercapacitor cabinet, which will not be described in detail here.

[0126] The second converter cabinet includes: a second bidirectional DC-DC controller and a second bidirectional DC-DC converter. The second bidirectional DC-DC controller is the same as the first bidirectional DC-DC controller in the first converter cabinet, and the second bidirectional DC-DC converter is the same as the first bidirectional DC-DC converter in the first converter cabinet, which will not be described in detail here.

[0127] When the load device is the second supercapacitor energy storage system, since the first supercapacitor energy storage system and the second supercapacitor energy storage system have the same structure, the complexity of the console controlling the first supercapacitor energy storage system and the second supercapacitor energy storage system can be reduced.

[0128] Optionally, the console is also used to control the discharge of the second supercapacitor energy storage system and to control the first supercapacitor energy storage system to absorb the electrical energy released by the second supercapacitor energy storage system. The console is also used to collect a third test parameter of the second supercapacitor energy storage system and a fourth test parameter of the first supercapacitor energy storage system during the test, obtain a third test result of the second supercapacitor energy storage system according to the third test parameter, and obtain a fourth test result of the first supercapacitor energy storage system according to the fourth test parameter.

[0129] In this embodiment, after the test of the first supercapacitor energy storage system is completed, the roles of the first supercapacitor energy storage system and the second supercapacitor energy storage system are swapped, the second supercapacitor energy storage system is controlled to discharge, and the first supercapacitor energy storage system absorbs the electric energy released by the second supercapacitor energy storage system, and then the power index after the role swap is tested through the console.

[0130] On the one hand, this embodiment uses the first supercapacitor energy storage system and the second supercapacitor energy storage system to perform a towing test to achieve power circulation, reduce the requirements for grid capacity, and save electric energy; on the other hand, the two sets of supercapacitor energy storage systems are tested against each other at one time, thereby improving the test efficiency.

[0131] Optionally, a fifth test result of the first supercapacitor energy storage system is obtained according to the first test parameter and the fourth test parameter, the fifth test result including but not limited to power assessment during charging and discharging, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment;

[0132] A sixth test result of the second supercapacitor energy storage system is obtained according to the second test parameter and the third test parameter. The sixth test result includes but is not limited to power assessment during charging or discharging, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment.

[0133] The first test parameter includes a first instantaneous current, a first instantaneous voltage and a first ambient temperature when the first supercapacitor energy storage system is discharged.

[0134] The fourth test parameter includes a fourth instantaneous current, a fourth instantaneous voltage and a fourth ambient temperature when the first supercapacitor energy storage system is discharged.

[0135] The calculation formula for the fifth test result during charging and discharging is as follows (6):

[0136] P(t)=u(t)×i(t) (6)

[0137] Wherein, during discharge, P(t) is the discharge power at time t, u(t) is the first instantaneous voltage at time t, and i(t) is the first instantaneous current at time t;

[0138] During charging, P(t) is the charging power at time t, u(t) is the fourth instantaneous voltage at time t, and i(t) is the fourth instantaneous current at time t.

[0139] The calculation formula for the energy efficiency assessment of the fifth test result is as follows (7):

[0140]

[0141] Among them, E in Input electrical energy to the first supercapacitor energy storage system; E out is the output electrical energy; i C2 is the first instantaneous current, u C2 is the first instantaneous voltage, i C1 is the fourth instantaneous current, u C1 is the fourth instantaneous voltage, and t1, t2, t3 and t4 are the start and end time of charging and the start and end time of discharging, respectively.

[0142] The calculation formulas for the current and voltage ripple rates during charging and discharging are as follows (7):

[0143]

[0144] Among them, ΔI% and ΔU% are the current ripple rate and voltage ripple rate respectively; ΔI and ΔU are the current ripple peak-to-peak value and the voltage ripple peak-to-peak value respectively; I0 and U0 are the current average value and the voltage average value respectively; ΔI, ΔU, I0 and U0 can all be calculated from the first instantaneous voltage, the first instantaneous current, the fourth instantaneous voltage, and the fourth instantaneous current. The specific calculation is the existing technology and will not be repeated here.

[0145] The calculation formula for the current and voltage error assessment during charging of the fifth test result is as follows (9):

[0146]

[0147] Among them, I1 is the fourth instantaneous current, I2 is the second constant current, U1 is the fourth instantaneous voltage, and U2 is the second constant voltage.

[0148] The fifth test result is that the method of evaluating the ambient temperature during charging and discharging is as follows:

[0149] An environmental temperature assessment during discharge is obtained according to the first environmental temperature, and an environmental temperature assessment during charge is obtained according to the fourth environmental temperature.

[0150] The first test result includes power assessment of the first supercapacitor energy storage system during discharge, current and voltage ripple rate assessment during discharge, and ambient temperature assessment during discharge.

[0151] The fourth test result includes power assessment of the first supercapacitor energy storage system during charging, current and voltage ripple rate assessment during charging, ambient temperature assessment during charging, and current and voltage error assessment during charging.

[0152] In summary, the fifth test result is a comprehensive test result of the first supercapacitor energy storage system during charging and discharging.

[0153] When the load device is a second supercapacitor energy storage system, the test on the second supercapacitor energy storage system is the same as the test on the first supercapacitor energy storage system.

[0154] The second test parameter includes a second instantaneous voltage, a second instantaneous current and a second ambient temperature, which correspond to the fourth instantaneous voltage, the fourth instantaneous current and the fourth ambient temperature of the fourth test parameter; the third test parameter includes a third instantaneous voltage, a third instantaneous current and a third ambient temperature, which correspond to the first instantaneous voltage, the first instantaneous current and the first ambient temperature of the first test parameter;

[0155] The fifth test result, the first test result and the fourth test result of the first supercapacitor energy storage system correspond to the sixth test result, the third test result and the second test result of the second supercapacitor energy storage system, respectively.

[0156] Similarly, the sixth test result is a comprehensive test result of the second supercapacitor energy storage system during charging and discharging.

[0157] The present invention can obtain comprehensive tests of two sets of supercapacitor energy storage systems during charging and discharging in one test cycle of a set of test systems.

[0158] Optionally, the console is connected to the second supercapacitor energy storage system, specifically:

[0159] The control console is connected to the second converter cabinet.

[0160] Optionally, the console is connected to the second converter cabinet, specifically:

[0161] The console is connected to the second bidirectional DC-DC controller.

[0162] Optionally, the four-quadrant converter is further used to: maintain the voltage at the output end of the four-quadrant converter as a second constant voltage;

[0163] The second constant voltage has the same function as the first constant voltage, and is used for when the discharge power of the second supercapacitor energy storage system is less than the charging power of the first supercapacitor energy storage system, the voltage at the output end of the four-quadrant converter is less than the second constant voltage, and the four-quadrant converter supplements the power difference between the charging power and the discharging power to maintain the voltage at the output end of the four-quadrant converter at the second constant voltage.

[0164] The second constant voltage may be DC1500V±20V or DC750V±20V.

[0165] The power difference between the charging power and the discharging power is supplemented by the four-quadrant converter to maintain the voltage at the output end of the four-quadrant converter as the second constant voltage, thereby broadening the test range of the second supercapacitor energy storage system.

[0166] Figure 4 Schematic diagram of a supercapacitor energy storage system testing method provided by the present invention. Figure 4 As shown, the method is applied to a supercapacitor energy storage system test platform, the platform includes a first supercapacitor energy storage system, a load device, a four-quadrant converter, a console and an input power supply, and the method includes:

[0167] S11, the console sends a first configuration instruction to the first supercapacitor energy storage system, where the first configuration instruction is used to configure an initial voltage of the first supercapacitor energy storage system and configure a state of the first supercapacitor energy storage system to a discharge-ready state.

[0168] S12, the console sends a second configuration instruction to the load device, where the second configuration instruction is used to configure the initial voltage and the end voltage of the load device, configure the charging current of the load device to the first constant current, and configure the state of the load device to the charging ready state.

[0169] S13, the console sends a first control instruction to the first supercapacitor energy storage system, where the first control instruction is used to instruct the first supercapacitor energy storage system to start discharging.

[0170] S14, the console sends a second control instruction to the load device, where the second control instruction is used to instruct the load device to start charging.

[0171] S15, during the test process, the console collects a first test parameter of the first supercapacitor energy storage system and a second test parameter of the load device, obtains a first test result of the first supercapacitor energy storage system according to the first test parameter, and obtains a second test result of the load device according to the second test parameter.

[0172] In an optional manner, in step S11, configuring the initial voltage of the first supercapacitor energy storage system by the first configuration instruction may be performed in the following manner:

[0173] After the first supercapacitor energy storage system receives the first configuration command, it is charged through the four-quadrant converter to increase the voltage of the first supercapacitor energy storage system to the initial voltage configured by the first configuration command. The initial voltage configured by the first configuration command may be: 900V.

[0174] In an optional manner, in step S12, configuring the initial voltage and the end voltage of the load device through the second configuration instruction, and configuring the charging current of the load device to the first constant current, may be performed in the following manner:

[0175] After the load device receives the second configuration command, it is charged through the four-quadrant converter to increase the voltage of the load device to the initial voltage configured by the second configuration command. The initial voltage configured by the second configuration command may be: 450V.

[0176] The second configuration command configures the end voltage of the load device, which is used to stop the test when the load device monitors that its own voltage increases to the end voltage configured by the second configuration command. The end voltage configured by the second configuration command can be 900V.

[0177] The second configuration command configures the charging current of the load device to be a first constant current, specifically: the load device is charged with a constant current, and the constant current charging current is the first constant current configured by the second configuration instruction. The first constant current can be: 1000±20A.

[0178] There is no limitation on the execution order of step S11 and step S12. S11 may be executed first and then S12, or S12 may be executed first and then S11, or S11 and S12 may be executed simultaneously.

[0179] The execution order of step S13 and step S14 may be to execute S13 first and then execute S14, or to execute S13 and S14 simultaneously.

[0180] The test process of the supercapacitor energy storage system test platform is as follows: first, the console controls the first supercapacitor energy storage system and the load device to charge to their respective configured initial voltages with a smaller power, and both the first supercapacitor energy storage system and the load device are charged through a four-quadrant converter and stop when their respective configured initial voltages are reached; secondly, the console controls the discharge of the first supercapacitor energy storage system and controls the charging of the load device, and the load device absorbs the electric energy released by the first supercapacitor energy storage system; finally, during the charging and discharging process, the console collects the first test parameters of the first supercapacitor energy storage system when discharging and the second test parameters of the load device when charging in real time, and obtains the first test results and the second test results of the supercapacitor energy storage system and the load device respectively according to the first test parameters and the second test parameters.

[0181] The first test result and the second test result are as in the above embodiment.

[0182] The supercapacitor energy storage system testing method provided by the present invention obtains a comprehensive test result of the first supercapacitor energy storage system when discharging through the first test result. When the load device is the second supercapacitor energy storage system, the comprehensive test result of the second supercapacitor energy storage system when charging is obtained through the second test result. The first supercapacitor energy storage system and the second supercapacitor energy storage system have the same structure. Therefore, the present invention can realize a comprehensive test of the supercapacitor energy storage system when charging or discharging. In addition, by simultaneously connecting the supercapacitor energy storage system and the load device to the output end of the four-quadrant converter, during the discharge test of the first supercapacitor energy storage system, the load device absorbs the electric energy released by the first supercapacitor energy storage system to realize power circulation, reduce the requirements for the grid capacity, and save electric energy; and avoid directly acting the released electric energy on the AC grid, reducing the impact on the AC grid voltage during the test.

[0183] Optionally, the four-quadrant converter is further used to: maintain the voltage at the output end of the four-quadrant converter as a first constant voltage;

[0184] When the discharge power of the first supercapacitor energy storage system is less than the charging power of the load device, the voltage at the output end of the four-quadrant converter is less than the first constant voltage, and the four-quadrant converter supplements the power difference between the charging power and the discharging power to maintain the voltage at the output end of the four-quadrant converter at the first constant voltage.

[0185] Maintaining the voltage at the output end of the four-quadrant converter as a first constant voltage includes: the four-quadrant converter adopts a voltage and current dual closed-loop control method to maintain the voltage at the output end as the first constant voltage, and when the voltage decreases, the four-quadrant converter can automatically adjust the output power to maintain the voltage at the output end as the first constant voltage.

[0186] During the discharge of the first supercapacitor energy storage system and the charging of the load device, as time goes by, the maximum discharge power of the first supercapacitor energy storage system becomes smaller, and the power required for charging the load device becomes larger. When the maximum discharge power provided by the first supercapacitor energy storage system is less than the power required for charging the load device, the voltage at the output end of the four-quadrant converter is less than the first constant voltage. At this time, the four-quadrant converter can automatically adjust the output power to make up for the power difference between the power required for charging the load device and the discharge power of the first supercapacitor energy storage system, so as to maintain the voltage at the output end at the first constant voltage.

[0187] The first constant voltage may be DC1500V±20V or DC750V±20V.

[0188] The power difference between the charging power and the discharging power is supplemented by the four-quadrant converter to maintain the voltage at the output end of the four-quadrant converter as the first constant voltage, thereby broadening the test range of the first supercapacitor energy storage system.

[0189] Figure 5 is another schematic diagram of a supercapacitor energy storage system testing method provided by the present invention, wherein S11-S15 and Figure 4 Same, refer to above Figure 4 I will not repeat it here. On this basis, Figure 5 As shown, it also includes:

[0190] S16: If the current voltage of the load device is the end voltage of the load device, the test is stopped.

[0191] Specifically, the above step S16 includes that during the test process, as the load device is continuously charged, the voltage of the load device is continuously increased, and when the voltage of the load device increases to the end voltage, the test is stopped.

[0192] In an optional manner, in the above Figure 4 and Figure 5 In step S15 shown, the console collects the first test parameter of the first supercapacitor energy storage system during the discharge process of the first supercapacitor energy storage system, and obtains the first test result of the first supercapacitor energy storage system according to the first test parameter, which can be obtained in the following manner:

[0193] The first supercapacitor energy storage system includes a first supercapacitor cabinet and a first converter cabinet. The console collects a first test parameter of the first supercapacitor cabinet through the first converter cabinet during the discharge process of the first supercapacitor energy storage system, and obtains a first test result of the first supercapacitor energy storage system according to the first test parameter.

[0194] Optionally, the second control instruction is generated according to a first charging current set by the load device;

[0195] The first control instruction is generated according to a first discharge current obtained from the first charge current.

[0196] The second control instruction is generated according to the first charging current set by the load device. A possible implementation method is:

[0197] The first charging current is set according to the test plan developed in the control console.

[0198] The first control instruction is generated according to the first discharge current obtained from the first charging current. A possible implementation manner is:

[0199] The console calculates the discharge current instruction of the first supercapacitor energy storage system by collecting the terminal voltage of the first supercapacitor energy storage system and the terminal voltage of the load device. The calculation formula is (10):

[0200] P(t)=u SC1 (t)×i SC1 (t) = uSC2 (t)×i SC2 (t) (10)

[0201] Among them, P(t) is the power value at equilibrium, u SC1 (t) is the terminal voltage of the load device, i SC1 (t) is the first charging current of the load device, u SC2 (t) is the terminal voltage of the first supercapacitor energy storage system, i SC2 (t) is the first discharge current of the first supercapacitor energy storage system.

[0202] Optionally, the initial voltage of the first supercapacitor energy storage system is greater than the initial voltage of the load device.

[0203] When the initial voltage of the first supercapacitor energy storage system is greater than the initial voltage of the load device, the electric energy stored in the first supercapacitor energy storage system can preferentially meet the power required for charging the load device during the test, thereby reducing the electric energy obtained from the four-quadrant converter.

[0204] Optionally, the load device is a second supercapacitor energy storage system, and the second supercapacitor energy storage system includes a second supercapacitor cabinet and a second converter cabinet.

[0205] When the load device is the second supercapacitor energy storage system, since the first supercapacitor energy storage system and the second supercapacitor energy storage system have the same structure, the complexity of the console controlling the first supercapacitor energy storage system and the second supercapacitor energy storage system can be reduced.

[0206] Figure 6 Schematic diagram of another supercapacitor energy storage system testing method provided by the present invention, such as Figure 6 As shown, after step S16, the method further includes:

[0207] S21, the console sends a third configuration instruction to the second supercapacitor energy storage system, where the third configuration instruction is used to configure the initial voltage of the second supercapacitor energy storage system and configure the state of the second supercapacitor energy storage system to a discharge ready state.

[0208] S22, the console sends a fourth configuration instruction to the first supercapacitor energy storage system, where the fourth configuration instruction is used to configure the initial voltage and the end voltage of the first supercapacitor energy storage system, configure the charging current of the first supercapacitor energy storage system to the second constant current, and configure the state of the first supercapacitor energy storage system to the charging ready state.

[0209] S23, the console sends a third control instruction to the second supercapacitor energy storage system, where the third control instruction is used to instruct the second supercapacitor energy storage system to start discharging.

[0210] S24, the console sends a fourth control instruction to the first supercapacitor energy storage system, where the fourth control instruction is used to instruct the first supercapacitor energy storage system to start charging.

[0211] S25, during the test, the console collects a third test parameter of the second supercapacitor energy storage system and a fourth test parameter of the first supercapacitor energy storage system; obtains a third test result of the second supercapacitor energy storage system according to the third test parameter, and obtains a fourth test result of the first supercapacitor energy storage system according to the fourth test parameter.

[0212] In an optional manner, when configuring the initial voltage of the second supercapacitor energy storage system by the third configuration instruction in step S21, the following manner may be adopted:

[0213] After the second supercapacitor energy storage system receives the third configuration command, it charges and discharges through the four-quadrant converter to increase the voltage of the second supercapacitor energy storage system to the initial voltage configured by the third configuration command, which may be 900V.

[0214] In an optional manner, the following manner may be used to configure the initial voltage and the end voltage of the first supercapacitor energy storage system by the fourth configuration instruction in step S22, and to configure the charging current of the first supercapacitor energy storage system to the second constant current:

[0215] After the first supercapacitor energy storage system receives the fourth configuration command, charging and discharging are performed through the four-quadrant converter to adjust the voltage of the first supercapacitor energy storage system to the initial voltage configured by the fourth configuration command, which may be 450V.

[0216] The fourth configuration command configures the end voltage of the first supercapacitor energy storage system, and is used to stop the test when the first supercapacitor energy storage system monitors that its own voltage increases to the end voltage configured by the fourth configuration command. The end voltage configured by the fourth configuration command can be 900V.

[0217] The fourth configuration command configures the charging current of the first supercapacitor energy storage system to the second constant current. Specifically, the first supercapacitor energy storage system is charged with a constant current, and the constant current charging current is the second constant current configured by the fourth configuration instruction. The second constant current can be: 1000±20A.

[0218] There is no limitation on the execution order of step S21 and step S22. S21 may be executed first and then S22, or S22 may be executed first and then S21, or S21 and S22 may be executed simultaneously.

[0219] The execution order of step S23 and step S24 may be to execute S23 first and then execute S24, or to execute S23 and S24 simultaneously.

[0220] The third test result and the fourth test result are the same as those in the above embodiment.

[0221] On the one hand, this embodiment uses the first supercapacitor energy storage system and the second supercapacitor energy storage system to perform a towing test to achieve power circulation, reduce the requirements for grid capacity, and save electric energy; on the other hand, the mutual test of the two sets of supercapacitor energy storage systems is completed at one time, which is highly efficient.

[0222] Optionally, a fifth test result of the first supercapacitor energy storage system is obtained according to the first test parameter and the fourth test parameter, the fifth test result including power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment and ambient temperature assessment;

[0223] A sixth test result of the second supercapacitor energy storage system is obtained according to the second test parameter and the third test parameter. The sixth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment.

[0224] The fifth test result and the sixth test result are the same as those in the above embodiment.

[0225] Optionally, the four-quadrant converter is further used to: maintain the voltage at the output end of the four-quadrant converter as a second constant voltage;

[0226] The second constant voltage has the same function as the first constant voltage, and is used for when the discharge power of the second supercapacitor energy storage system is less than the charging power of the first supercapacitor energy storage system, the voltage at the output end of the four-quadrant converter is less than the second constant voltage, and the four-quadrant converter supplements the power difference between the charging power and the discharging power to maintain the voltage at the output end of the four-quadrant converter at the second constant voltage.

[0227] The second constant voltage may be DC1500V±20V or DC750V±20V.

[0228] The power difference between the charging power and the discharging power is supplemented by the four-quadrant converter to maintain the voltage at the output end of the four-quadrant converter as the second constant voltage, thereby broadening the test range of the second supercapacitor energy storage system.

[0229] Optionally, it also includes:

[0230] S26: If the current voltage of the first supercapacitor energy storage system is the end voltage of the first supercapacitor energy storage system, stop the test.

[0231] During the test, as the first supercapacitor energy storage system is continuously charged, the voltage of the first supercapacitor energy storage system is continuously increased. When the voltage of the first supercapacitor energy storage system increases to the end voltage, the test is stopped.

[0232] In an optional manner, in the above Figure 6 In step S25 shown, the console collects the third test parameter of the second supercapacitor energy storage system during the discharge process of the second supercapacitor energy storage system, and obtains the third test result of the second supercapacitor energy storage system according to the third test parameter, which can be obtained in the following manner:

[0233] During the discharge process of the second supercapacitor energy storage system, a third test parameter of the second supercapacitor cabinet is collected through the second converter cabinet, and a third test result of the second supercapacitor energy storage system is obtained according to the third test parameter.

[0234] Optionally, the fourth control instruction is generated according to a second charging current set by the first supercapacitor energy storage system, and the third control instruction is generated according to a second discharging current obtained from the second charging current.

[0235] The method for generating the fourth control instruction is the same as the method for generating the second control instruction, and will not be described in detail.

[0236] The method for generating the third control instruction is the same as the method for generating the first control instruction, and will not be described in detail.

[0237] Optionally, the initial voltage of the second supercapacitor energy storage system is greater than the initial voltage of the first supercapacitor energy storage system.

[0238] When the initial voltage of the second supercapacitor energy storage system is greater than the initial voltage of the first supercapacitor energy storage system, the electric energy stored in the second supercapacitor energy storage system during the test can preferentially meet the power required for charging the first supercapacitor energy storage system, thereby reducing the electric energy obtained from the four-quadrant converter.

[0239] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0240] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A supercapacitor energy storage system test platform, characterized in that: It includes a first supercapacitor energy storage system, a load device, a four-quadrant converter, a control console and an input power supply; The input power supply is connected to the four-quadrant converter; the input power supply is used to provide power for the four-quadrant converter; The first supercapacitor energy storage system and the load device are respectively connected to the output end of the four-quadrant converter; The four-quadrant converter is used for mutual conversion between alternating current and direct current; The console is connected to the first supercapacitor energy storage system and the load device respectively, and is used to configure the initial voltage and discharge-ready state of the first supercapacitor energy storage system and the initial voltage, end voltage and charge-ready state of the load device; The console sends a first control instruction to the first supercapacitor energy storage system, the first control instruction is used to control the discharge of the first supercapacitor energy storage system, and the console sends a second control instruction to the load device, the second control instruction is used to control the load device to absorb the electric energy released by the first supercapacitor energy storage system, wherein the first control instruction is generated according to the first discharge current obtained by the first charging current, and the second control instruction is generated according to the first charging current set by the load device, and the console calculates the discharge current instruction of the first supercapacitor energy storage system by collecting the terminal voltage of the first supercapacitor energy storage system and the terminal voltage of the load device, and the calculation formula is: in, is the power value at equilibrium, is the terminal voltage of the load device, is the first charging current of the load device, is the terminal voltage of the first supercapacitor energy storage system, is a first discharge current of the first supercapacitor energy storage system; The console is also used to collect a first test parameter of the first supercapacitor energy storage system and a second test parameter of the load device during the test, obtain a first test result of the first supercapacitor energy storage system according to the first test parameter, and obtain a second test result of the load device according to the second test parameter; the test result includes at least one of: power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment; The four-quadrant converter is further used to: maintain the voltage at the output end of the four-quadrant converter as a first constant voltage; When the discharge power of the first supercapacitor energy storage system is less than the charging power of the load device, the voltage at the output end of the four-quadrant converter is less than the first constant voltage, the four-quadrant converter supplements the power difference between the charging power and the discharge power, and the four-quadrant converter automatically adjusts the output power to maintain the voltage at the output end of the four-quadrant converter at the first constant voltage.

2. The test platform according to claim 1, characterized in that: The first supercapacitor energy storage system includes: a first supercapacitor cabinet and a first converter cabinet; the console is connected to the first converter cabinet.

3. The test platform according to claim 2, characterized in that: The first supercapacitor cabinet comprises: a first display, a first supercapacitor controller and a first supercapacitor energy storage unit; The first display is used to display the operating status and alarm information of the first supercapacitor cabinet, the first supercapacitor controller is used to adjust the voltage and temperature of the first supercapacitor energy storage unit, and the first supercapacitor energy storage unit is used to store electrical energy.

4. The test platform according to claim 2, characterized in that: The first converter cabinet comprises: a first bidirectional DC-DC controller and a first bidirectional DC-DC converter; The first bidirectional DC-DC controller is used to control the first bidirectional DC-DC converter to charge and discharge.

5. The test platform according to any one of claims 1 to 4, characterized in that: The input power source is the power provided to the four-quadrant converter by the low-voltage power grid through a low-voltage power distribution cabinet and an isolation transformer.

6. The test platform according to any one of claims 1 to 4, characterized in that: The console is a personal computer (PC), and the PC is connected to the first supercapacitor energy storage system and the load device respectively via Ethernet.

7. The test platform according to claim 4, characterized in that: The console is connected to the first converter cabinet and includes: The console is connected to the first bidirectional DC-DC controller.

8. The test platform according to any one of claims 1 to 4, characterized in that: The load device is a second supercapacitor energy storage system, and the second supercapacitor energy storage system includes a second supercapacitor cabinet and a second converter cabinet.

9. The test platform according to claim 8, characterized in that: The console is also used to control the discharge of the second supercapacitor energy storage system and to control the first supercapacitor energy storage system to absorb the electric energy released by the second supercapacitor energy storage system. The console is also used to collect the third test parameter of the second supercapacitor energy storage system and the fourth test parameter of the first supercapacitor energy storage system during the test, obtain the third test result of the second supercapacitor energy storage system according to the third test parameter, and obtain the fourth test result of the first supercapacitor energy storage system according to the fourth test parameter.

10. The test platform according to claim 9, characterized in that: Obtaining a fifth test result of the first supercapacitor energy storage system according to the first test parameter and the fourth test parameter, wherein the fifth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment; A sixth test result of the second supercapacitor energy storage system is obtained according to the second test parameter and the third test parameter, wherein the sixth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment.

11. A supercapacitor energy storage system testing method, characterized in that: The method is applied to a supercapacitor energy storage system test platform, which includes a first supercapacitor energy storage system, a load device, a four-quadrant converter, a console, and an input power supply: The console sends a first configuration instruction to the first supercapacitor energy storage system, where the first configuration instruction is used to configure an initial voltage of the first supercapacitor energy storage system and to configure a state of the first supercapacitor energy storage system to a discharge-ready state; The console sends a second configuration instruction to the load device, wherein the second configuration instruction is used to configure an initial voltage and an end voltage of the load device, configure a charging current of the load device to a first constant current, and configure a state of the load device to a charge-ready state; The console sends a first control instruction to the first supercapacitor energy storage system, where the first control instruction is used to instruct the first supercapacitor energy storage system to start discharging; The console sends a second control instruction to the load device, where the second control instruction is used to instruct the load device to start charging; The first control instruction is generated according to the first discharge current obtained from the first charging current, the second control instruction is generated according to the first charging current set by the load device, and the console calculates the discharge current instruction of the first supercapacitor energy storage system by collecting the terminal voltage of the first supercapacitor energy storage system and the terminal voltage of the load device, and the calculation formula is: in, is the power value at equilibrium, is the terminal voltage of the load device, is the first charging current of the load device, is the terminal voltage of the first supercapacitor energy storage system, is a first discharge current of the first supercapacitor energy storage system; The console collects a first test parameter of the first supercapacitor energy storage system and a second test parameter of the load device during the test, obtains a first test result of the first supercapacitor energy storage system according to the first test parameter, and obtains a second test result of the load device according to the second test parameter; The four-quadrant converter is further used to: maintain the voltage at the output end of the four-quadrant converter as a first constant voltage; When the discharge power of the first supercapacitor energy storage system is less than the charging power of the load device, the voltage at the output end of the four-quadrant converter is less than the first constant voltage, the four-quadrant converter supplements the power difference between the charging power and the discharge power, and the four-quadrant converter automatically adjusts the output power to maintain the voltage at the output end of the four-quadrant converter at the first constant voltage.

12. The testing method according to claim 11, characterized in that: Also includes, If the current voltage of the load device is the end voltage of the load device, the test is stopped.

13. The testing method according to claim 11, characterized in that: The second control instruction is generated according to a first charging current set by the load device; The first control instruction is generated according to a first discharging current obtained from the first charging current.

14. The testing method according to claim 11, characterized in that: The first supercapacitor energy storage system includes a first supercapacitor cabinet and a first converter cabinet; The collecting of the first test parameter of the first supercapacitor energy storage system includes: During the discharge process of the first supercapacitor energy storage system, the first test parameter of the first supercapacitor energy storage system is collected through the first converter cabinet.

15. The testing method according to claim 11, characterized in that: The initial voltage of the first supercapacitor energy storage system is greater than the initial voltage of the load device.

16. The testing method according to any one of claims 11 to 15, characterized in that: The load device is a second supercapacitor energy storage system, and the second supercapacitor energy storage system includes a second supercapacitor cabinet and a second converter cabinet.

17. The testing method according to claim 16, characterized in that: The method further comprises: The console sends a third configuration instruction to the second supercapacitor energy storage system, where the third configuration instruction is used to configure an initial voltage of the second supercapacitor energy storage system and to configure a state of the second supercapacitor energy storage system to a discharge-ready state; The console sends a fourth configuration instruction to the first supercapacitor energy storage system, wherein the fourth configuration instruction is used to configure an initial voltage and an end voltage of the first supercapacitor energy storage system, and to configure a charging current of the first supercapacitor energy storage system to a second constant current, and to configure a state of the first supercapacitor energy storage system to a charge-ready state; The console sends a third control instruction to the second supercapacitor energy storage system, wherein the third control instruction is used to instruct the second supercapacitor energy storage system to start discharging; The console sends a fourth control instruction to the first supercapacitor energy storage system, where the fourth control instruction is used to instruct the first supercapacitor energy storage system to start charging; During the test, the console collects a third test parameter of the second supercapacitor energy storage system and a fourth test parameter of the first supercapacitor energy storage system; obtains a third test result of the second supercapacitor energy storage system according to the third test parameter, and obtains a fourth test result of the first supercapacitor energy storage system according to the fourth test parameter.

18. A supercapacitor energy storage system testing method according to claim 17, characterized in that: Obtaining a fifth test result of the first supercapacitor energy storage system according to the first test parameter and the fourth test parameter, wherein the fifth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment; A sixth test result of the second supercapacitor energy storage system is obtained according to the second test parameter and the third test parameter, wherein the sixth test result includes power assessment, energy efficiency assessment, current and voltage ripple rate assessment, current and voltage error assessment, and ambient temperature assessment.

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