Current source type hydrogen production power supply test circuit and test method based on full-control device

Abstract

The invention belongs to the field of power electronic devices, and discloses a current source type hydrogen production power supply test circuit and test method based on a full-control device. Comprising a reactive power compensation device, an alternating current inlet wire transformer, a short circuit cable, a three-phase current detection device, a three-phase voltage detection device, a temperature detection device, a direct current side current detection device and a hydrogen production power supply control device, the primary side of the alternating-current inlet wire transformer is connected with an alternating-current inlet wire, and the secondary side is connected with the alternating-current side of the hydrogen production power supply; the reactive power compensation device, the current detection device and the voltage detection device are connected with the primary side of the alternating current inlet wire transformer; the short-circuit cable is used for short-circuit connection with the direct-current side of the hydrogen production power supply; the direct-current side current detection device is connected with the direct-current side of the hydrogen production power supply; and the temperature detection device is connected with an inductor and a full-control device of the hydrogen production power supply. Full-link verification and full-current testing of the current source type hydrogen production power supply based on the full-control device are realized, so that parameters such as current tolerance capability and temperature of each device in the hydrogen production power supply are verified.

Description

Technical Field

[0001] The invention belongs to the field of power electronic devices, and relates to a current source type hydrogen production power supply test circuit and a test method based on a fully controlled device. Background Art

[0002] As a clean energy with high energy density, environmental friendliness and easy storage, hydrogen energy can be combined with renewable energy to form an electric hydrogen integrated energy system. While improving the reliability and stability of the system power supply, it can also improve energy utilization and reduce carbon emissions. At present, most hydrogen production power sources are semi-controlled thyristor devices. With the development of new energy, semi-controlled devices cannot be shut down autonomously, and in the case of weak power grid systems, grid fluctuations can cause thyristor power supplies to lose control, thereby causing energy loss in the electrolyzer. Therefore, fully controlled devices have emerged as the times require, especially current source-based fully controlled devices. Due to its small number of transformation stages, high efficiency, and the use of modular current multi-level mode, it has good harmonic performance and is an important trend in the development of hydrogen production power.

[0003] The test method for hydrogen production power supply based on semi-controlled thyristor devices is relatively mature. Usually, the full current is achieved by short-circuiting the DC side, and the AC side is only provided with a voltage for the thyristor to turn on, which is usually only a dozen volts. It is not connected to the actual system, and the switching characteristics of the thyristor are not tested. Because it does not have a harmonic quality function, its control of grid harmonics is not tested. However, fully controlled thyristor devices not only need to verify the current flow of each device, but also need to understand parameters such as overvoltage and stray design in each switching process to ensure that the device can operate in a safe area. If the modular multi-level current source fully controlled hydrogen power supply uses the test method of the hydrogen power supply of the semi-controlled thyristor device, the overvoltage characteristics of the thyristor device cannot be verified due to the low AC input voltage. At the same time, since the thyristor device cannot achieve full capacity output, the current and voltage sampling accuracy in the hydrogen power supply cannot be verified, and the power quality of the modular multi-level current source fully controlled hydrogen power supply connected to the grid cannot be verified. In particular, for manufacturers of power supplies with smaller incoming grid capacity, there is no way to rely on the full-link and full-function test of the modular multi-level current source fully controlled hydrogen power supply before leaving the factory. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a current source type hydrogen production power supply test circuit and test method based on a fully controlled device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a current source type hydrogen production power supply test circuit based on a fully controlled device, comprising a reactive power compensation device, an AC incoming line transformer, a short-circuit cable, a voltage and current detection device, a temperature detection device, a DC side current detection device, and a hydrogen production power supply control device;

[0007] The primary side of the AC incoming transformer is used to connect the AC incoming line, and the secondary side is connected to the AC side of the hydrogen production power supply; the reactive power compensation device and the voltage and current detection device are both connected to the primary side of the AC incoming transformer; the two ends of the short-circuit cable are respectively connected to the two ends of the DC side of the hydrogen production power supply; the DC side current detection device is connected to the DC side of the hydrogen production power supply; the temperature detection device is connected to the inductor and full control device of the hydrogen production power supply;

[0008] The voltage and current detection device is used to detect the three-phase voltage and three-phase current of the primary side of the AC incoming transformer; the reactive compensation device is used to obtain reactive compensation power according to the three-phase current and three-phase voltage of the primary side of the AC incoming transformer and perform reactive compensation on the primary side of the AC incoming transformer according to the reactive compensation power; the hydrogen production power supply control device is connected to the hydrogen production power supply, and is used to control the AC side output of the hydrogen production power supply to be reactive power, as well as to control the power output target value and climbing curve of the hydrogen production power supply, and to control the output current of the DC side of the hydrogen production power supply.

[0009] Optionally, a first circuit breaker is further included, and the reactive power compensation device is connected to the primary side of the AC incoming transformer via the first circuit breaker.

[0010] Optionally, it also includes a second circuit breaker and a plurality of submodule circuit breakers;

[0011] One end of the second circuit breaker is connected to the primary side of the AC incoming line transformer, and the other end is connected to the first circuit breaker and is used to connect the AC incoming line. One end of several sub-module circuit breakers is connected to the secondary side of the AC incoming line transformer, and the other end is respectively connected to each sub-module of the hydrogen production power supply.

[0012] Optionally, when the fully-controlled device is an IGCT, the temperature detection device includes a temperature sensor, an NTC thermistor and a thermocouple; when the fully-controlled device is a reverse-resistance IGCT, the temperature detection device includes a temperature sensor and an NTC thermistor; wherein the temperature sensor is pre-buried in the inductor of the hydrogen production power supply to detect the temperature of the inductor of the hydrogen production power supply; the NTC thermistor is integrated in the fully-controlled device of the hydrogen production power supply to detect the temperature of the fully-controlled device of the hydrogen production power supply; the thermocouple is in contact with the diode of the hydrogen production power supply to detect the temperature of the diode of the hydrogen production power supply.

[0013] Optionally, it further includes a plurality of first submodule current detection devices, a second submodule current detection devices and a submodule current equalization control device;

[0014] A plurality of first submodule current detection devices are respectively connected to the first DC output terminal of each submodule of the hydrogen production power supply, and are used to detect the current value of the first DC output terminal of each submodule of the hydrogen production power supply; a plurality of second submodule current detection devices are respectively connected to the second DC output terminal of each submodule of the hydrogen production power supply, and are used to detect the current value of the second DC output terminal of each submodule of the hydrogen production power supply; a submodule current equalizing control device is connected to each submodule of the hydrogen production power supply, and is used to perform current equalizing control on each submodule of the hydrogen production power supply according to the current value of the first DC output terminal and the current value of the second DC output terminal of each submodule of the hydrogen production power supply.

[0015] Optionally, the AC incoming line is a 10kV AC incoming line or a 35kV AC incoming line, and the output voltage range of the secondary side of the AC incoming line transformer is 200 to 1000V.

[0016] Optionally, the capacity of the AC incoming line transformer is at least 1.2 times the capacity of the hydrogen production power supply.

[0017] Optionally, the voltage and current detection device includes a three-phase current detection device and a three-phase voltage detection device; the three-phase current detection device and the DC side current detection device are both Hall current sensors, and the three-phase voltage detection device is a voltage sensor.

[0018] Optionally, a cooling system for reducing the heat of the hydrogen production power source is also included.

[0019] In a second aspect, the present invention provides a method for testing a current source type hydrogen production power supply based on a fully controlled device, comprising:

[0020] Short-circuit the DC side of the hydrogen production power supply, connect the hydrogen production power supply to the AC incoming line through the AC incoming line transformer, and control the AC side of the hydrogen production power supply to output reactive power;

[0021] Control the hydrogen production power supply to operate according to the set power output target value and climbing curve, and control the output current of the DC side of the hydrogen production power supply to operate according to the set current magnitude;

[0022] During the operation of the hydrogen production power supply, the three-phase voltage and three-phase current of the primary side of the AC incoming line transformer are detected in real time, and the reactive compensation power is obtained according to the three-phase voltage and three-phase current, and the reactive compensation is performed on the primary side of the AC incoming line transformer in real time according to the reactive compensation power, and the temperature of the inductor of the hydrogen production power supply and the temperature of the full control device are detected in real time.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention is based on a current source type hydrogen production power supply test circuit of a fully controlled device. The AC side output of the hydrogen production power supply is controlled to be reactive power by a hydrogen production power supply control device. Then, the three-phase current and three-phase voltage of the primary side of the AC incoming line transformer are detected by a voltage and current detection device to obtain reactive compensation power accordingly. Then, reactive compensation is performed on the primary side of the AC incoming line transformer according to the reactive compensation power, so that the reactive power at the grid connection is close to 0. At the same time, the two ends of the DC side of the hydrogen production power supply are short-circuited by a short-circuiting cable, and the load impedance is close to 0 ohms, thereby reducing the active power of the hydrogen production power supply to the grid. The power demand makes the active demand at the grid connection point close to 0, which not only reduces the power consumption of the power grid, but also does not affect the power quality of the power grid. Then, the power output target value and climbing curve of the hydrogen production power supply are controlled, as well as the output current size of the DC side of the hydrogen production power supply. The temperature detection device is used to detect the temperature of the inductor and the fully controlled device of the hydrogen production power supply, and the full-link verification and full-current test of the current source type hydrogen production power supply based on the fully controlled device are realized, so that the parameters such as the current tolerance capacity and temperature of each device in the hydrogen production power supply are verified. The current source type hydrogen production power supply test circuit based on the fully controlled device can realize the constant power test and constant current test functions of the hydrogen production power supply, can detect the AC power quality and DC side output ripple of the hydrogen production power supply, can realize the hydrogen production power supply curve step test, effectively improve the efficiency test, and meet the factory test requirements of the hydrogen production power supply in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of a current source type hydrogen production power supply test circuit based on a fully controlled device according to an embodiment of the present invention.

[0026] Among them: 1-reactive power compensation device; 2-AC incoming line transformer; 3-submodule; 4-secondary control circuit power supply; 5-secondary control circuit power supply circuit breaker; 6-first circuit breaker; 7-submodule circuit breaker; 8-voltage and current detection device; 9-second circuit breaker; 10-first submodule current detection device; 11-second submodule current detection device; 12-DC side current detection device; 13-short-circuit cable. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 only 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 should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0030] See also Figure 1 In one embodiment of the present invention, a current source type hydrogen production power supply test circuit based on fully controlled devices is provided, specifically a full-link, full-current test method for a modular multi-level current source type hydrogen production power supply based on fully controlled devices, which can verify the full-current output capability of the hydrogen production power supply during factory testing and has low active power demand for the power grid.

[0031] Specifically, the current source type hydrogen production power supply test circuit based on fully controlled devices includes a reactive power compensation device 1, an AC incoming line transformer 2, a short-circuit cable 13, a voltage and current detection device 8, a temperature detection device, a DC side current detection device 12 and a hydrogen production power supply control device.

[0032] The primary side of the AC incoming line transformer 2 is used to connect the AC incoming line, and the secondary side is connected to the AC side of the hydrogen production power supply; the reactive power compensation device 1 and the voltage and current detection device 8 are both connected to the primary side of the AC incoming line transformer 2; the two ends of the short-circuit cable 13 are respectively connected to the two ends of the DC side of the hydrogen production power supply; the DC side current detection device 12 is connected to the DC side of the hydrogen production power supply; the temperature detection device is connected to the inductor and the full control device of the hydrogen production power supply.

[0033] Among them, the voltage and current detection device 8 is used to detect the three-phase voltage and three-phase current of the primary side of the AC incoming transformer 2; the reactive compensation device 1 is used to obtain reactive compensation power according to the three-phase current and three-phase voltage of the primary side of the AC incoming transformer 2 and perform reactive compensation on the primary side of the AC incoming transformer 2 according to the reactive compensation power; the hydrogen production power supply control device is connected to the hydrogen production power supply, and is used to control the AC side output of the hydrogen production power supply to be reactive power, as well as to control the power output target value and climbing curve of the hydrogen production power supply, and to control the output current of the DC side of the hydrogen production power supply.

[0034] Specifically, the current source type hydrogen production power source based on the fully controlled device itself includes multiple submodules 3, which are connected in parallel, and each submodule 3 includes 6 IGBT fully controlled devices S1-S6, 2 DC side inductors L1-L2 and some diodes. Among them, the IGBT fully controlled device can be an IGCT (integrated Gate Commutated Thyristors) or a reverse resistance type IGCT. The difference between IGCT and reverse resistance type IGCT is that the reverse resistance type IGCT does not require a commutation diode, while the IGCT needs to be equipped with a commutation diode.

[0035] As a supporting device of the hydrogen production power supply, the hydrogen production power supply control device is used to realize the control function of the hydrogen production power supply. Generally, a human-computer interaction platform is set up to facilitate control.

[0036] During the test, the DC side of the hydrogen production power supply can be short-circuited by the short-circuit cable 13. A control method different from that of the thyristor or other power supply design is adopted. The hydrogen production power supply control device adopts direct current control. By adjusting the control strategy of the power supply based on the current source characteristics, increasing the Q-axis instruction, and increasing the reactive output, the modulation ratio of the control system can be made the same as the actual load-carrying control modulation ratio, so that the AC side output of the hydrogen production power supply is reactive power, and a reactive compensation device 1 is configured on the primary side of the AC incoming transformer 2, so that at the grid connection point, the reactive compensation device 1 can compensate for the reactive power emitted by the hydrogen production power supply, so that the reactive power at the grid connection point is close to 0. In addition, the two ends of the DC side of the hydrogen production power supply are short-circuited by the short-circuit cable 13, and the load impedance is close to 0 ohms, which reduces the active power demand of the hydrogen production power supply for the power grid, and makes the active power demand at the grid connection point close to 0.

[0037] Among them, the capacity of the reactive power compensation device 1 matches the capacity of the hydrogen production power supply. At the same time, it is necessary to control the DC side current output value of the hydrogen production power supply during the test, and use the temperature detection device to detect the temperature of the inductor and the full control device of the hydrogen production power supply, so that the current tolerance and temperature of the equipment in the loop can be verified, which can ensure the full-link verification of the hydrogen production power supply and full current delivery, thereby reducing the power consumption of the power grid and will not affect the power quality of the power grid.

[0038] Based on the operation control of the hydrogen production power supply by the hydrogen production power supply control device, the current source type hydrogen production power supply test circuit based on the full-control device can realize the constant power test and constant current test functions of the hydrogen production power supply, can detect the AC power quality and DC side output ripple of the hydrogen production power supply, can realize the hydrogen production power supply curve step test, effectively improve the efficiency test, and meet the factory test needs of the hydrogen production power supply in the market.

[0039] To sum up, the current source type hydrogen production power supply test circuit based on the fully controlled device of the present invention effectively solves the problem that the prior art cannot perform full-link and full-current testing, and realizes grid-connected testing based on reactive and active power requirements close to 0, so that the test loop has the function of testing the harmonic effects of the device, fundamentally solving the problems of large active power required for the test, complex composition of the test loop and limited test conditions, so that the hydrogen production power supply can perform full-link and full-function testing before leaving the factory, avoiding the problem of re-debugging after arriving at the site, and accelerating the rapid on-site commissioning of the equipment.

[0040] In a possible implementation, it further includes a first circuit breaker 6, and the reactive power compensation device 1 is connected to the primary side of the AC incoming line transformer 2 through the first circuit breaker 6. Optionally, it further includes a second circuit breaker 9 and a plurality of submodule circuit breakers 7; one end of the second circuit breaker 9 is connected to the primary side of the AC incoming line transformer 2, and the other end is connected to the first circuit breaker 6 and is used to connect the AC incoming line, and one end of the plurality of submodule circuit breakers 7 is connected to the secondary side of the AC incoming line transformer 2, and the other end is respectively connected to each submodule 3 of the hydrogen production power supply.

[0041] Specifically, by providing the first circuit breaker 6 and the second circuit breaker 9, the start and end control of the test is facilitated, and the safety of wiring and operation can be ensured.

[0042] In a possible implementation, when the fully-controlled device is an IGCT, the temperature detection device includes a temperature sensor, an NTC thermistor and a thermocouple; when the fully-controlled device is a reverse-resistance IGCT, the temperature detection device includes a temperature sensor and an NTC thermistor; wherein the temperature sensor is pre-buried in the inductor of the hydrogen production power supply to detect the temperature of the inductor of the hydrogen production power supply; the NTC thermistor is integrated in the fully-controlled device of the hydrogen production power supply to detect the temperature of the fully-controlled device of the hydrogen production power supply; the thermocouple is in contact with the diode of the hydrogen production power supply to detect the temperature of the diode of the hydrogen production power supply.

[0043] In a possible embodiment, it also includes a plurality of first submodule current detection devices 10, a second submodule current detection device 11 and a submodule current equalization control device; the plurality of first submodule current detection devices 10 are respectively connected to the first DC output terminal of each submodule 3 of the hydrogen production power supply, and are used to detect the current value of the first DC output terminal of each submodule 3 of the hydrogen production power supply; the plurality of second submodule current detection devices 11 are respectively connected to the second DC output terminal of each submodule 3 of the hydrogen production power supply, and are used to detect the current value of the second DC output terminal of each submodule 3 of the hydrogen production power supply; the submodule current equalization control device is connected to each submodule 3 of the hydrogen production power supply, and is used to perform current equalization control on each submodule 3 of the hydrogen production power supply according to the current value of the first DC output terminal and the current value of the second DC output terminal of each submodule 3 of the hydrogen production power supply.

[0044] Specifically, two submodule 3 current detection devices are installed on each submodule 3. The submodule 3 current detection device can use a Hall current sensor to detect the current of each submodule 3 to achieve current sharing control of each submodule 3. The existing conventional current sharing control solution can be used.

[0045] In a possible implementation manner, the AC incoming line is a 10 kV AC incoming line or a 35 kV AC incoming line, and the output voltage range of the secondary side of the AC incoming line transformer 2 is 200-1000V.

[0046] Optionally, the capacity of the AC incoming line transformer 2 is at least 1.2 times the capacity of the hydrogen production power supply.

[0047] Specifically, when conducting a full-link full-current test, it is connected to a 10kV or 35kV AC incoming line. Since the DC output voltage of the hydrogen production power supply is low, in order to ensure a higher voltage utilization rate, the voltage on the AC side is set to 200-1000V (according to different electrolyzer voltages). Therefore, an AC incoming line transformer 2 is connected to the hydrogen production power supply circuit to achieve low voltage requirements. Its capacity is generally selected according to 1.2 times the hydrogen production power supply capacity.

[0048] In a possible implementation, the voltage and current detection device 8 includes a three-phase current detection device and a three-phase voltage detection device; the three-phase current detection device and the DC side current detection device 12 are both Hall current sensors, and the three-phase voltage detection device is a voltage sensor. The DC side current detection device 12 can also be a current measurement device carried by the hydrogen production power source itself.

[0049] In a possible implementation, a cooling system for reducing the heat of the hydrogen production power source is also included.

[0050] Specifically, a cooling system is provided to cool down the hydrogen production power source in operation, and a contact cooler or a non-contact cooler may be used.

[0051] The operation process of the current source type hydrogen production power supply test circuit based on the fully controlled device of the present invention is described below:

[0052] Before the test, all components of the hydrogen production power supply itself are in a connected state, which is exactly the same as the connection method used in the engineering site, and is in a non-powered state. Then, the two ends of the DC side of the hydrogen production power supply are short-circuited through the short-circuiting cable 13, and the reactive compensation device 1 is connected to the primary side of the AC incoming line transformer 2, that is, the grid connection point of the hydrogen production power supply, and the first circuit breaker 6 is in an open state.

[0053] When testing the hydrogen production power supply, first close the first circuit breaker 6, then close each sub-module circuit breaker 7, close the secondary control circuit power circuit breaker 5 of each secondary control circuit power supply 4 of the hydrogen production power supply, and finally close the second circuit breaker 9. According to the characteristics of the electrolyzer, the electrolyzer requirements are simulated, and the power output target value and climbing curve of the hydrogen production power supply are input into the hydrogen production power supply control device. The dynamic reactive power compensation device 1 in the loop calculates the reactive power to be compensated in real time according to the detected three-phase current and three-phase voltage, and dynamically compensates in real time.

[0054] When the hydrogen production power supply is running, the status of each component is monitored in real time.

[0055] In another embodiment of the present invention, a current source type hydrogen production power supply testing method based on a fully controlled device is provided, comprising the following steps: short-circuiting the DC side of the hydrogen production power supply, connecting the hydrogen production power supply to the AC incoming line through the AC incoming line transformer 2, and controlling the AC side output of the hydrogen production power supply to reactive power; controlling the hydrogen production power supply to operate according to the set power output target value and the climbing curve, and controlling the output current of the DC side of the hydrogen production power supply to operate according to the set current magnitude; during the operation of the hydrogen production power supply, real-time detection of the three-phase voltage and three-phase current of the primary side of the AC incoming line transformer 2, and obtaining reactive compensation power based on the three-phase voltage and three-phase current, and performing reactive compensation on the primary side of the AC incoming line transformer 2 in real time based on the reactive compensation power, and real-time detection of the temperature of the inductor of the hydrogen production power supply and the temperature of the fully controlled device.

[0056] The testing method of the present invention can realize the constant power test and constant current test functions of the hydrogen production power supply, can detect the AC power quality and DC side output ripple of the hydrogen production power supply, can also realize the hydrogen production power supply curve step test, and can improve the efficiency test of the equipment, so as to meet the factory test requirements of the hydrogen production power supply in the market.

[0057] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A current source type hydrogen production power supply test circuit based on a fully controlled device, characterized in that: It comprises a reactive power compensation device (1), an AC line transformer (2), a short-circuit cable (13), a voltage and current detection device (8), a temperature detection device, a DC side current detection device (12), and a hydrogen production power supply control device; The primary side of the AC incoming line transformer (2) is used to connect the AC incoming line, and the secondary side is connected to the AC side of the hydrogen production power supply; the reactive power compensation device (1) and the voltage and current detection device (8) are both connected to the primary side of the AC incoming line transformer (2); the two ends of the short-circuit cable (13) are respectively connected to the two ends of the DC side of the hydrogen production power supply; the DC side current detection device (12) is connected to the DC side of the hydrogen production power supply; the temperature detection device is connected to the inductor and the full control device of the hydrogen production power supply; The voltage and current detection device (8) is used to detect the three-phase voltage and three-phase current of the primary side of the AC incoming transformer (2); the reactive power compensation device (1) is used to obtain reactive power compensation according to the three-phase current and three-phase voltage of the primary side of the AC incoming transformer (2) and to perform reactive power compensation on the primary side of the AC incoming transformer (2) according to the reactive power compensation; the hydrogen production power supply control device is connected to the hydrogen production power supply and is used to control the AC side of the hydrogen production power supply to output reactive power, as well as to control the power output target value and climbing curve of the hydrogen production power supply, and to control the output current of the DC side of the hydrogen production power supply.

2. According to the current source type hydrogen production power supply test circuit based on the fully controlled device according to claim 1, it is characterized in that: It also includes a first circuit breaker (6), and the reactive power compensation device (1) is connected to the primary side of the AC incoming line transformer (2) via the first circuit breaker (6).

3. The current source type hydrogen production power supply test circuit based on the fully controlled device according to claim 2 is characterized in that: It also includes a second circuit breaker (9) and a plurality of submodule circuit breakers (7); One end of the second circuit breaker (9) is connected to the primary side of the AC incoming line transformer (2), and the other end is connected to the first circuit breaker (6) and is used to connect the AC incoming line. One end of a plurality of submodule circuit breakers (7) is connected to the secondary side of the AC incoming line transformer (2), and the other end is respectively connected to each submodule (3) of the hydrogen production power supply.

4. The current source type hydrogen production power supply test circuit based on a fully controlled device according to claim 1 is characterized in that: When the fully-controlled device is an IGCT, the temperature detection device includes a temperature sensor, an NTC thermistor and a thermocouple; when the fully-controlled device is a reverse-resistance IGCT, the temperature detection device includes a temperature sensor and an NTC thermistor; wherein the temperature sensor is pre-buried in the inductor of the hydrogen-producing power supply and is used to detect the temperature of the inductor of the hydrogen-producing power supply; the NTC thermistor is integrated in the fully-controlled device of the hydrogen-producing power supply and is used to detect the temperature of the fully-controlled device of the hydrogen-producing power supply; the thermocouple is in contact with the diode of the hydrogen-producing power supply and is used to detect the temperature of the diode of the hydrogen-producing power supply.

5. The current source type hydrogen production power supply test circuit based on fully controlled devices according to claim 1 is characterized in that: It also includes a plurality of first submodule current detection devices (10), a second submodule current detection device (11) and a submodule current equalization control device; A plurality of first submodule current detection devices (10) are respectively connected to the first DC output end of each submodule (3) of the hydrogen production power supply, and are used to detect the current value of the first DC output end of each submodule (3) of the hydrogen production power supply; a plurality of second submodule current detection devices (11) are respectively connected to the second DC output end of each submodule (3) of the hydrogen production power supply, and are used to detect the current value of the second DC output end of each submodule (3) of the hydrogen production power supply; and a submodule current equalizing control device is connected to each submodule (3) of the hydrogen production power supply, and is used to perform equalizing control on each submodule (3) of the hydrogen production power supply according to the current value of the first DC output end and the current value of the second DC output end of each submodule (3) of the hydrogen production power supply.

6. The current source type hydrogen production power supply test circuit based on full control devices according to claim 1 is characterized in that: The AC incoming line is a 10kV AC incoming line or a 35kV AC incoming line, and the output voltage range of the secondary side of the AC incoming line transformer (2) is 200-1000V.

7. The current source type hydrogen production power supply test circuit based on a fully controlled device according to claim 1 is characterized in that: The capacity of the AC incoming transformer (2) is at least 1.2 times the capacity of the hydrogen production power supply.

8. The current source type hydrogen production power supply test circuit based on fully controlled devices according to claim 1 is characterized in that: The voltage and current detection device (8) comprises a three-phase current detection device and a three-phase voltage detection device; the three-phase current detection device and the DC side current detection device (12) are both Hall current sensors, and the three-phase voltage detection device is a voltage sensor.

9. The current source type hydrogen production power supply test circuit based on fully controlled devices according to claim 1 is characterized in that: Also included is a cooling system for reducing the heat of the hydrogen production power source.

10. A method for testing a current source type hydrogen production power supply based on a fully controlled device, characterized in that: include: The DC side of the hydrogen production power supply is short-circuited, and the AC incoming line is connected to the hydrogen production power supply via the AC incoming line transformer (2), and the AC side of the hydrogen production power supply is controlled to output reactive power; Control the hydrogen production power supply to operate according to the set power output target value and climbing curve, and control the output current of the DC side of the hydrogen production power supply to operate according to the set current magnitude; During the operation of the hydrogen production power supply, the three-phase voltage and three-phase current of the primary side of the AC incoming line transformer (2) are detected in real time, and reactive compensation power is obtained based on the three-phase voltage and three-phase current, and reactive compensation is performed on the primary side of the AC incoming line transformer (2) in real time based on the reactive compensation power, and the temperature of the inductor of the hydrogen production power supply and the temperature of the full control device are detected in real time.

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