Device for testing and detecting power voltage and current regulating equipment

Abstract

The utility model discloses a device for testing and detecting power voltage and current regulating equipment. The device consists of a cabinet body 1, an operation controller 2, an output wiring terminal 3, an input wiring terminal 4, a main storage battery 5, a main bidirectional energy storage inverter 6, a main dual-power change-over switch 7, an auxiliary storage battery 8, an auxiliary bidirectional energy storage inverter 9 and an auxiliary dual-power change-over switch 10, the operation controller 2 is embedded in the surface of the cabinet body 1, the display and the operation button are arranged outside the cabinet body 1, and the wiring terminal is arranged inside the cabinet body 1; the output wiring terminal 3 is embedded in the surface of the cabinet body 1; the output wiring terminal 3 is connected with a device circuit wire and an output wire for test detection, the output wire for test detection is arranged on the outer side of the cabinet body 1, and the device circuit wire is arranged on the inner side of the cabinet body 1; the input wiring terminal 4 is embedded in the surface of the cabinet body 1; the output wiring terminal 3 is connected with a device circuit wire and an input wire used for test detection, the input wire used for test detection is arranged on the outer side of the cabinet body 1, and the device circuit wire is arranged on the inner side of the cabinet body 1.

Description

Technical Field

[0001] The utility model relates to a device for testing and detecting electric voltage and current regulating equipment, belonging to the field of production testing of power electronic equipment. Background Art

[0002] With the development of power electronics technology, high-power converters based on IGBT and other devices are widely used, such as frequency converters, SVG, active filter devices, three-phase unbalanced adjustment devices, power electronic transformers, etc. Such devices need to be tested and inspected for input and output under various working conditions during R&D and production commissioning. In the past, the test method was to directly connect the actual grid power supply to the input end, and use resistors, capacitors, and reactors to simulate the load and connect it to the output side. During the test, not only a large amount of electric energy is consumed, but also the quality of grid power is affected. The most important thing is that the test platform on the input side and the output is complex to build, and various equipment needs to be configured to meet the simulation of working conditions. The investment is high and the operation is cumbersome. In summary, there is an urgent need for an efficient technical solution for testing and detecting power voltage and current regulating equipment. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a device for testing and detecting electric power voltage and current regulating equipment, which is composed of a cabinet 1, an operation controller 2, an output terminal 3, an input terminal 4, a main battery 5, a main bidirectional energy storage inverter 6, a main dual power supply switch 7, a secondary battery 8, a secondary bidirectional energy storage inverter 9, and a secondary dual power supply switch 10;

[0004] The operation controller 2 is mounted on the surface of the cabinet 1, the display and operation buttons are on the outside of the cabinet 1, and the connection terminals are on the inside of the cabinet 1;

[0005] The output terminal 3 is embedded on the surface of the cabinet 1; the output terminal 3 is connected to the device circuit wiring and the output line for test detection, the output line for test detection is on the outside of the cabinet 1, and the device circuit wiring is on the inside of the cabinet 1;

[0006] The input wiring terminal 4 is embedded on the surface of the cabinet 1; the output wiring terminal 3 is connected to the device circuit wiring and the input line for test detection, the input line for test detection is on the outside of the cabinet 1, and the device circuit wiring is on the inside of the cabinet 1;

[0007] The main battery 5 is connected to the DC side of the main bidirectional energy storage inverter 6 through two DC wires;

[0008] The AC side of the main bidirectional energy storage inverter 6 is simultaneously connected to one input terminal of the main dual power switch 7 and one input terminal of the auxiliary dual power switch 10 through AC wires;

[0009] The output end of the main dual power switch 7 is connected to the input terminal 4 through an AC wire;

[0010] The auxiliary battery 8 is connected to the DC side of the auxiliary bidirectional energy storage inverter 9 via two DC wires;

[0011] The AC side of the auxiliary bidirectional energy storage inverter 9 is simultaneously connected to the other input end of the main dual power switch 7 and the other input end of the auxiliary dual power switch 10 through an AC wire;

[0012] The output end of the secondary dual power supply switch 10 is connected to the output terminal 3 through an AC wire.

[0013] The operation controller 2 is connected to the communication interfaces of the main bidirectional energy storage inverter 6, the main dual power supply switching switch 7, the auxiliary bidirectional energy storage inverter 9, and the auxiliary dual power supply switching switch 10 respectively by communication lines;

[0014] The main storage battery 5 is connected to the battery management communication interface of the main bidirectional energy storage inverter 6 by a communication line;

[0015] The auxiliary battery 8 is connected to the battery management communication interface of the auxiliary bidirectional energy storage inverter 9 by a communication line.

[0016] The main battery 5 and the sub-battery 8 have the same capacity and rated charge and discharge current.

[0017] The main bidirectional energy storage inverter 6 and the auxiliary bidirectional energy storage inverter 9 have the same rated power and rated AC and DC voltage, and both have V / f mode and P / Q mode.

[0018] The rated voltage and rated current of the main dual power supply switch 7 and the auxiliary dual power supply switch 10 are the same.

[0019] When the voltage regulating device is tested and inspected, the operation controller 2 selects a group of charged batteries and their bidirectional energy storage inverters as the discharge power supply circuit, and the operation controller 2 controls the input side of the auxiliary dual power supply switching switch 10 to switch to the discharge power supply circuit at this time. The operation controller 2 controls the bidirectional energy storage inverter to adopt the V / F mode discharge operation, and then controls the discharge voltage and frequency according to the test and inspection requirements, and records the real-time voltage, frequency, current, and power factor values; at the same time, the operation controller 2 controls the input side of the main dual power supply switching switch 7 to switch to another battery and its bidirectional energy storage inverter, and the operation controller 2 controls the bidirectional energy storage inverter in this circuit to adopt the P / Q mode charging operation, and then controls the charging current and power factor according to the test and inspection requirements, and records the real-time voltage, frequency, current, and power factor values; When the current regulating device is tested and inspected, the operation controller 2 selects a group of charged batteries and their bidirectional energy storage inverters as the discharge power supply circuit, and the operation controller 2 controls the input side of the auxiliary dual power supply switching switch 10 to switch to the discharge power supply circuit at this time. The discharge power supply circuit, the operation controller 2 controls the bidirectional energy storage inverter to adopt the V / F mode discharge operation, and then controls the discharge voltage and frequency according to the test requirements, and records the real-time voltage, frequency, current, and power factor values; at the same time, the operation controller 2 selects a group of charged batteries and their bidirectional energy storage inverters as the charging power supply circuit, the operation controller 2 controls the input side of the main dual power supply switching switch 7 to switch to another battery and its bidirectional energy storage inverter, the operation controller 2 controls the bidirectional energy storage inverter in this circuit to adopt the V / F mode charging operation, and then controls the discharge voltage and frequency according to the test requirements, and records the real-time voltage, frequency, current, and power factor values; during the test and detection work, when the battery power in the discharge power supply circuit drops to 0 or the battery power in the charging power supply circuit is full, the operation controller 2 controls the synchronous switching of the auxiliary dual power supply switching switch 10 and the input side of the power supply switching switch 7, swaps the originally connected bidirectional energy storage inverter, and swaps the operation mode and operation parameters of the bidirectional energy storage inverter.

[0020] Before the test and detection work, the controller 2 is operated to check the power of the main battery 5 and the auxiliary battery 8 through the main bidirectional energy storage inverter 6 and the auxiliary bidirectional energy storage inverter 9 respectively; when the total power of the main battery 5 and the auxiliary battery 8 does not meet the requirements of this test and detection work, the output terminal 3 or the input terminal 4 is connected to an external power supply with a wire, and the main bidirectional energy storage inverter 6 or the auxiliary bidirectional energy storage inverter 9, the main dual power supply switching switch 7 and the auxiliary dual power supply switching switch 10 are controlled by the operating controller 2 to transfer the electric energy to the battery for charging.

[0021] The utility model adopts two groups of batteries with completely the same parameters, a bidirectional energy storage inverter and a dual power supply switch to form two sets of controllable charging and discharging energy storage systems, utilizes one set of energy storage systems to perform power supply simulation and electric energy supply, utilizes one set of energy storage systems to perform load simulation and electric energy recovery, realizes the test and inspection of distribution network voltage and current regulating equipment and completes the recovery of electric energy at the same time, reduces the test and inspection cost and energy consumption; moreover, the two sets of electric energy storage systems can be functionally swapped by an operating controller, which is convenient for test work and reduces the impact on the power quality of the power grid during the test and inspection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the overall structure diagram; 1 is the cabinet, 2 is the operation controller, 3 is the output terminal, and 4 is the input terminal.

[0023] Figure 2 It is the internal layout diagram; 5 is the main battery, 6 is the main bidirectional energy storage inverter, 7 is the main dual power supply switching switch, 8 is the auxiliary battery, 9 is the auxiliary bidirectional energy storage inverter, and 10 is the auxiliary dual power supply switching switch.

[0024] Figure 3 It is the electrical principle wiring diagram; 3 is the output terminal, 4 is the input terminal, 5 is the main battery, 6 is the main two-way energy storage inverter, 7 is the main dual power supply switch, 8 is the auxiliary battery, 9 is the auxiliary two-way energy storage inverter, and 10 is the auxiliary dual power supply switch.

[0025] Figure 4 It is a control communication schematic diagram; 2 is the operation controller, 5 is the main battery, 6 is the main bidirectional energy storage inverter, 7 is the main dual power supply switch, 8 is the auxiliary battery, 9 is the auxiliary bidirectional energy storage inverter, and 10 is the auxiliary dual power supply switch.

[0026] Figure 5 Wiring diagram for application. DETAILED DESCRIPTION

[0027] The following is a device scheme for conducting a 1-hour test on power voltage and current regulating equipment with a rated input and output voltage of 400V and a rated input and output current of 100A.

[0028] like Figure 1 , Figure 2 As shown, the test and detection device of the utility model is composed of a cabinet 1, an operation controller 2, an output terminal 3, an input terminal 4, a main battery 5, a main bidirectional energy storage inverter 6, a main dual power supply switch 7, a secondary battery 8, a secondary bidirectional energy storage inverter 9, and a secondary dual power supply switch 10;

[0029] The operation controller 2 is mounted on the surface of the cabinet 1, the display and operation buttons are on the outside of the cabinet 1, and the wiring terminals are on the inside of the cabinet 1;

[0030] The output terminal 3 is embedded on the surface of the cabinet 1; the output terminal 3 is connected with the device circuit wiring and the output line for test detection, the output line for test detection is on the outside of the cabinet 1, and the device circuit wiring is on the inside of the cabinet 1;

[0031] The input wiring terminal 4 is embedded on the surface of the cabinet 1; the output wiring terminal 3 is connected to the device circuit wiring and the input line for test detection, the input line for test detection is on the outside of the cabinet 1, and the device circuit wiring is on the inside of the cabinet 1;

[0032] like Figure 3 As shown, the main battery 5 is connected to the DC side of the main bidirectional energy storage inverter 6 through two DC wires;

[0033] The AC side of the main bidirectional energy storage inverter 6 is simultaneously connected to one input terminal of the main dual power switch 7 and one input terminal of the auxiliary dual power switch 10 through AC wires;

[0034] The output end of the main dual power switch 7 is connected to the input terminal 4 through an AC wire;

[0035] The auxiliary battery 8 is connected to the DC side of the auxiliary bidirectional energy storage inverter 9 through two DC wires;

[0036] The AC side of the auxiliary bidirectional energy storage inverter 9 is simultaneously connected to the other input end of the main dual power supply switch 7 and the other input end of the auxiliary dual power supply switch 10 through an AC wire;

[0037] The output end of the secondary dual power supply switch 10 is connected to the output terminal 3 through an AC line.

[0038] like Figure 4 As shown, the operation controller 2 is connected to the communication interfaces of the main bidirectional energy storage inverter 6, the main dual power supply switching switch 7, the auxiliary bidirectional energy storage inverter 9, and the auxiliary dual power supply switching switch 10 respectively by communication lines;

[0039] The main storage battery 5 is connected to the battery management communication interface of the main bidirectional energy storage inverter 6 by a communication line;

[0040] The auxiliary battery 8 is connected to the battery management communication interface of the auxiliary bidirectional energy storage inverter 9 by a communication line.

[0041] The main battery 5 and the auxiliary battery 8 are both lead-acid battery packs, the battery pack voltage is 800V, the capacity is 100Ah, and the rated charge and discharge current is 100A.

[0042] The rated power model specifications of the main bidirectional energy storage inverter 6 and the auxiliary bidirectional energy storage inverter 9 are the same, with a rated capacity of 700kVA, a rated AC voltage of 500V, a rated DC voltage of 900V, an adjustable power factor of 0% to 100%, and both have a constant voltage and frequency mode (V / f) and a constant power mode (P / Q).

[0043] The rated voltage of the main dual power supply switch 7 and the auxiliary dual power supply switch 10 are both 0V, and the rated current is both 150A.

[0044] Before the formal test and detection work, the device needs to check the power of the main battery 5 and the auxiliary battery 8 to prevent the process loss from causing the inability to work continuously. The power check is performed by the operation controller 2 through the communication with the main battery 5 and the auxiliary battery 8 through the main bidirectional energy storage inverter 6 and the auxiliary bidirectional energy storage inverter 9, and the power data in the battery information management system is obtained; when the total power of the main battery 5 and the auxiliary battery 8 does not meet the requirements of this test and detection work, a group of batteries with more power are selected for charging, and the output terminal 3 or the output terminal 4 is connected to the external power supply with a wire. The main bidirectional energy storage inverter 6 or the auxiliary bidirectional energy storage inverter 9, the main dual power supply switching switch 7 and the auxiliary dual power supply switching switch 10 are controlled by a predetermined program on the operation controller 2 to transfer electric energy to the battery for charging until the total power is charged to the power required for this test and detection.

[0045] After the device power meets the working conditions, Figure 5 Connect the equipment under test. The input wires of the equipment under test are connected to the output terminal 3 according to the phase sequence, and the output wires of the equipment under test are connected to the input terminal 4 according to the phase sequence.

[0046] The following is an example of the operation process of the device of the new patent during the test and inspection of the voltage regulator (voltage compensation equipment) and the three-phase unbalanced adjustment device (current compensation equipment). Take the 400V / 100A voltage regulator (voltage compensation equipment) as an example. The secondary output voltage range of the voltage regulator is 300-500V, and the current is 100A. The stability check of the voltage regulator with a load of 100A is carried out when the output of the voltage regulator is 450V. First, input the requirements of this test into the operating controller 2: the primary working input voltage of the voltage regulator is 400V, the frequency is 50Hz, and the secondary load is 100A. Then, follow the steps below. Figure 5Connect the wires. Then, select a group of batteries with electricity (or high electricity) and their bidirectional energy storage inverters as the discharge power supply circuit on the operating controller 2, such as the main battery 5 and its main bidirectional energy storage inverter 6; the operating controller 2 controls the input side of the auxiliary dual power switch 10 to switch to the main bidirectional energy storage inverter 6 according to the program, and the operating controller 2 controls the main bidirectional energy storage inverter 6 to adopt the V / F mode discharge operation, and controls the AC voltage and frequency of the main bidirectional energy storage inverter 6 to 400V and 50Hz. Secondly, start the voltage regulator and adjust the operating state to a ratio of 400 / 450; then the operating controller 2 controls the input side of the main dual power switch 7 to switch to the auxiliary bidirectional energy storage inverter 9 according to the program, and the operating controller 2 controls the auxiliary bidirectional energy storage inverter 9 in this circuit to adopt the P / Q mode charging operation, and controls the charging current to 100A. The whole set of test tests enters the continuous tracking and recording state, and records the voltage, current, frequency of the output terminal 3 and the voltage, current, frequency of the input terminal 4 respectively, and the recorded content is evaluated by the test results. When the power of the main battery 5 is reduced to 0 during the test, the operation controller 2 suspends the operation of the two bidirectional energy storage inverters, switches the input side of the auxiliary dual power switch 10 to the auxiliary bidirectional energy storage inverter 9, and switches the input side of the main dual power switch 7 to the main bidirectional energy storage inverter 6. At the same time, the operation controller 2 swaps the operation modes and operation parameters of the main bidirectional energy storage inverter 6 and the bidirectional energy storage inverter 10, that is, the bidirectional energy storage inverter 8 adopts the V / F mode discharge operation, and controls the AC voltage and frequency of the auxiliary bidirectional energy storage inverter 9 to 400V and 50Hz. Secondly, start the voltage regulator and adjust the operating state to a ratio of 400 / 450; then the operation controller 2 controls the input side of the main dual power switch 7 to switch to the main bidirectional energy storage inverter 6 according to the program, and the operation controller 2 controls the main bidirectional energy storage inverter 6 in this circuit to adopt the P / Q mode charging operation, and controls the charging current to 100A. The whole process is repeated until the test is completed.

[0047] Take the 400V / 100A three-phase unbalanced regulator (current compensation device) as an example. The output voltage range of the three-phase unbalanced regulator is 380~450V, and the current is 0~80A. The voltage tracking stability check of the three-phase unbalanced regulator output 50A is measured. First, input the test requirements in the operation controller 2: the voltage regulator has a primary working input voltage of 400V and a frequency of 50Hz, and a secondary access frequency of 50Hz and a voltage of 390V in the grid. Then, follow the Figure 5Then, the operating controller 2 selects a group of batteries with power (or high power) and their bidirectional energy storage inverters as the discharge power supply circuit, such as the main battery 5 and its main bidirectional energy storage inverter 6; the operating controller 2 controls the input side of the auxiliary dual power supply switch 10 to switch to the main bidirectional energy storage inverter 6 according to the program, and the operating controller 2 controls the main bidirectional energy storage inverter 6 to adopt the V / F mode discharge operation, and controls the AC voltage and frequency of the main bidirectional energy storage inverter 6 to 400V and 50Hz. Secondly, start the three-phase unbalanced regulating device and adjust the operating state to an output current of 80A; then operate the controller 2 to control the input side of the main dual power supply switching switch 7 to switch to the auxiliary bidirectional energy storage inverter 9 according to the program; operate the controller 2 to control the auxiliary bidirectional energy storage inverter 9 in this circuit to adopt the V / F mode charging operation, and control the AC voltage and frequency of the auxiliary bidirectional energy storage inverter 9 to 390V and 50Hz; the auxiliary bidirectional energy storage inverter 9 automatically absorbs the output current of the three-phase unbalanced regulating device and charges the electricity into the auxiliary battery 8; the whole set of test tests enters a continuous tracking and recording state, and records the voltage, current, frequency of the output terminal 3 and the voltage, current, frequency of the input terminal 4 respectively, and the recorded content is evaluated by the test results. When the power of the auxiliary battery 8 reaches the upper limit during the test, the operation controller 2 suspends the operation of the two bidirectional energy storage inverters, switches the input side of the auxiliary dual power supply switching switch 10 to the auxiliary bidirectional energy storage inverter 9, and switches the input side of the main dual power supply switching switch 7 to the main bidirectional energy storage inverter 6. At the same time, the operation controller 2 controls the input side of the auxiliary dual power supply switching switch 10 to switch to the auxiliary bidirectional energy storage inverter 9. The operation controller 2 controls the auxiliary bidirectional energy storage inverter 9 to adopt the V / F mode discharge operation, and controls the AC voltage and frequency of the auxiliary bidirectional energy storage inverter 9 to 400V and 50Hz. Secondly, the three-phase unbalanced regulating device is started and the operating state is adjusted to an output current of 80A; then the operating controller 2 controls the input side of the main dual power switch 7 to switch to the main bidirectional energy storage inverter 6 according to the program, and the operating controller 2 controls the auxiliary bidirectional energy storage inverter 9 in this circuit to adopt the V / F mode charging operation, and controls the AC voltage and frequency of the main bidirectional energy storage inverter 6 to 390V and 50Hz, and the main bidirectional energy storage inverter 6 automatically absorbs the output current of the three-phase unbalanced regulating device and charges the electricity into the main battery 5. The whole process is repeated until the test is completed.

[0048] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described here.

Claims

1. A device for testing and detecting electric power voltage and current regulating equipment, characterized in that: It is composed of a cabinet (1), an operation controller (2), an output terminal (3), an input terminal (4), a main storage battery (5), a main bidirectional energy storage inverter (6), a main dual power supply switch (7), a secondary storage battery (8), a secondary bidirectional energy storage inverter (9), and a secondary dual power supply switch (10); The operation controller (2) is mounted on the surface of the cabinet (1), the display and the operation buttons are on the outside of the cabinet (1), and the connection terminals are on the inside of the cabinet (1); The output wiring terminal (3) is embedded in the surface of the cabinet (1); the output wiring terminal (3) is connected to the device circuit wiring and the output line for test detection, the output line for test detection is on the outside of the cabinet (1), and the device circuit wiring is on the inside of the cabinet (1); The input wiring terminals (4) are embedded on the surface of the cabinet (1); the output wiring terminals (3) are connected to the device circuit wiring and the input wires for test detection, the input wires for test detection are on the outside of the cabinet (1), and the device circuit wiring is on the inside of the cabinet (1); The main storage battery (5) is connected to the DC side of the main bidirectional energy storage inverter (6) via two DC wires; The AC side of the main bidirectional energy storage inverter (6) is simultaneously connected to one input end of the main dual power supply switch (7) and one input end of the auxiliary dual power supply switch (10) through AC wires; The output end of the main dual power switch (7) is connected to the input wiring terminal (4) via an AC wire; The auxiliary battery (8) is connected to the DC side of the auxiliary bidirectional energy storage inverter (9) via two DC wires; The AC side of the auxiliary bidirectional energy storage inverter (9) is simultaneously connected to another input end of the main dual power supply switch (7) and another input end of the auxiliary dual power supply switch (10) through an AC wire; The output end of the secondary dual power supply switch (10) is connected to the output wiring terminal (3) via an AC wire; The operation controller (2) is connected to the communication interfaces of the main bidirectional energy storage inverter (6), the main dual power supply switching switch (7), the auxiliary bidirectional energy storage inverter (9), and the auxiliary dual power supply switching switch (10) respectively by means of communication lines; The main storage battery (5) is connected to the battery management communication interface of the main bidirectional energy storage inverter (6) by means of a communication line; The auxiliary storage battery (8) is connected to the battery management communication interface of the auxiliary bidirectional energy storage inverter (9) by means of a communication line.

2. A device for testing and detecting electric voltage and current regulating equipment according to claim 1, characterized in that The main battery (5) and the auxiliary battery (8) have the same capacity and rated charge and discharge current.

3. According to the device for testing and detecting electric voltage and current regulating equipment as described in claim 1, it is characterized in that The main bidirectional energy storage inverter (6) and the auxiliary bidirectional energy storage inverter (9) have the same rated power and rated AC and DC voltage, and both have a V / f mode and a P / Q mode.

4. According to the device for testing and detecting electric voltage and current regulating equipment as described in claim 1, it is characterized in that The rated voltage and rated current of the main dual power supply switch (7) and the auxiliary dual power supply switch (10) are the same.

5. A device for testing and detecting electric voltage and current regulating equipment according to claim 1, characterized in that: When the voltage regulating device is tested and inspected, the operation controller (2) selects a group of charged storage batteries and their bidirectional energy storage inverters as a discharge power supply circuit, and the operation controller (2) controls the input side of the auxiliary dual power supply switching switch (10) to switch to the discharge power supply circuit at this time, and the operation controller (2) controls the bidirectional energy storage inverter to adopt the V / F mode for discharge operation, and then controls the discharge voltage and frequency according to the test and inspection requirements, and records the real-time voltage, frequency, current, and power factor values; at the same time, the operation controller (2) controls the input side of the main dual power supply switching switch (7) to switch to another battery and its bidirectional energy storage inverter, and the operation controller (2) controls the bidirectional energy storage inverter in this circuit to adopt the P / Q mode for charging operation, and then controls the charging current and power factor according to the test and inspection requirements, and records the real-time voltage, frequency, current, and power factor values; When the flow regulating device is tested and inspected, the operation controller (2) selects a group of charged batteries and their bidirectional energy storage inverters as a discharge power supply circuit, and the operation controller (2) controls the input side of the auxiliary dual power supply switching switch (10) to switch to the discharge power supply circuit at this time, and the operation controller (2) controls the bidirectional energy storage inverter to adopt a V / F mode for discharge operation, and then controls the discharge voltage and frequency according to the test and inspection requirements, and records the real-time voltage, frequency, current, and power factor values; at the same time, the operation controller (2) selects a group of charged batteries and their bidirectional energy storage inverters as a charging power supply circuit, and the operation controller (2) controls the input side of the main dual power supply switching switch (7) to switch to another battery and its bidirectional energy storage inverter, and the operation controller (2) controls the bidirectional energy storage inverter in this circuit to adopt a V / F mode for charging operation, and then controls the discharge voltage and frequency according to the test and inspection requirements, and records the real-time voltage, frequency, current, and power factor values; During the test and detection work, when the battery power in the discharge power circuit is about to reach 0 or the battery power in the charging power circuit is fully charged, the operation controller (2) controls the synchronous switching of the input side of the auxiliary dual power switch (10) and the power switch (7), swaps the originally connected bidirectional energy storage inverter, and simultaneously swaps the operation mode and operation parameters of the bidirectional energy storage inverter.

6. A device for testing and detecting electric power voltage and current regulating equipment according to claim 5, characterized in that: Before the test and detection work, the controller (2) is operated to check the power of the main battery (5) and the auxiliary battery (8) through the main bidirectional energy storage inverter (6) and the auxiliary bidirectional energy storage inverter (9) respectively; when the total power of the main battery (5) and the auxiliary battery (8) does not meet the requirements of the test and detection work, the output terminal (3) or the input terminal (4) is connected to an external power supply with a wire, and the main bidirectional energy storage inverter (6) or the auxiliary bidirectional energy storage inverter (9), the main dual power supply switch (7) and the auxiliary dual power supply switch (10) are controlled by the controller (2) to transfer the electric energy to the battery for charging.

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