Trigger circuit of thyristor and hydrogen production power supply

Abstract

The utility model provides a trigger circuit of a thyristor and a hydrogen production power supply. The trigger circuit between a controller and the thyristor adopts a light splitting module and a trigger board; when the thyristor needs to be controlled, the controller outputs an optical signal, the optical signal is sequentially transmitted to the light splitting module and the trigger plate through the optical fiber, and the trigger plate triggers the thyristor; that is to say, the control signal is transmitted in the form of the optical signal, so that additional interference caused by transmission of an electric signal is avoided, the signal transmission response speed and stability are improved, the thyristor response rate and stability are improved, and the ever-increasing hydrogen production requirement is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of power electronics, and more specifically, particularly relates to a thyristor trigger circuit and a hydrogen production power supply. Background Art

[0002] In the field of high-power hydrogen production power, there are two main technical paths to choose from: one is thyristor rectifier and the other is insulated gate bipolar transistor rectifier. Thyristor rectifier has been widely used in large-scale water electrolysis hydrogen production industry due to its high technical maturity and stable performance.

[0003] At present, the triggering method of thyristors is to use a controller output voltage signal, that is, the controller transmits an electrical signal to a drive circuit, and the drive circuit applies a positive voltage to the gate of the thyristor. When the voltage reaches a certain value, the thyristor is turned on.

[0004] However, the controller is susceptible to electromagnetic interference during the process of outputting electrical signals, which leads to certain limitations in response speed and stability, making it difficult to meet the growing demand for hydrogen production. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a thyristor trigger circuit and a hydrogen production power supply, which are used to control the transmission of signals in the form of optical signals, avoid additional interference when using electrical signals for transmission, and improve the response speed and stability of signal transmission.

[0006] The first aspect of the present application discloses a thyristor trigger circuit, comprising: a light splitting module and N trigger boards; N is the number of thyristors to be triggered;

[0007] The optical signal end of the controller is connected to the input end of the optical splitting module through an optical fiber;

[0008] The N output ends of the light splitting module are connected to the input ends of the N trigger boards in a one-to-one correspondence through optical fibers;

[0009] N trigger plates correspond one to one with N thyristors;

[0010] The output end of each trigger board is connected to the control end of the corresponding thyristor.

[0011] Optionally, the light splitting module includes: a light splitting plate;

[0012] The input end of the light splitter plate serves as the input end of the light splitter module;

[0013] Each output end of the light splitting plate serves as an output end of the light splitting module.

[0014] Optionally, the optical splitter includes: an optical signal transceiver, N optical-to-electrical circuits and N electrical-to-optical circuits;

[0015] The input end of the optical signal transceiver serves as the input end of the beam splitter;

[0016] The output end of the optical signal transceiver is respectively connected to the optical signal ends of the N optical-to-electrical circuits;

[0017] The electrical signal ends of the N optical-to-electrical circuits are connected to the electrical signal ends of the N electrical-to-optical circuits in a one-to-one correspondence;

[0018] The optical signal ends of the N electrical-to-optical circuits all serve as an output end of the beam splitter.

[0019] Optionally, the optical splitting module includes: an optical splitter;

[0020] The input end of the optical splitter serves as the input end of the optical splitting module;

[0021] Each output end of the optical splitter is connected to an input end of each trigger board through an optical fiber.

[0022] Optionally, the optical splitter is a one-to-two optical splitter; and N is 2.

[0023] The second aspect of the present application discloses a hydrogen production power supply, comprising: a controller, a rectifier circuit, and a trigger circuit as described in any one of the first aspects of the present application;

[0024] At least one half-bridge in the rectifier circuit has at least two thyristors connected in parallel;

[0025] Each output terminal of the trigger circuit is connected to the control terminal of each thyristor in the same half bridge in a one-to-one correspondence;

[0026] The trigger circuit is controlled by the optical signal of the controller.

[0027] Optionally, the rectifier circuit includes: a three-phase bridge arm, an inductor and a resistor;

[0028] The inductor and the resistor form a series branch;

[0029] The first end of each phase bridge arm is connected to one end of the series branch;

[0030] The second end of each phase bridge arm is connected to the other end of the series branch;

[0031] The midpoints of the three-phase bridge arms correspond one-to-one to the three-phase AC power supply;

[0032] The midpoint of each phase bridge arm is connected through the positive pole of the corresponding AC power source;

[0033] The negative pole of the three-phase AC power supply is connected;

[0034] The bridge arm comprises an upper half bridge and a lower half bridge; the connection point between the upper half bridge and the lower half bridge serves as the midpoint of the bridge arm.

[0035] Optionally, each of the upper half bridges and each of the lower half bridges is provided with N thyristors connected in parallel.

[0036] Optionally, a heat dissipation unit is also included.

[0037] Optionally, the heat dissipation unit includes: a water-cooled heat dissipation unit and / or an air-cooled heat dissipation unit.

[0038] It can be seen from the above technical scheme that the utility model provides a thyristor trigger circuit, and the trigger circuit between the controller and the thyristor adopts a spectrometer module and a trigger board; then, when the thyristor needs to be controlled, the controller outputs an optical signal, and transmits it to the spectrometer module and the trigger board in sequence through the optical fiber, and the trigger board triggers the thyristor; that is, the control signal is transmitted in the form of an optical signal, avoiding additional interference caused by the transmission of electrical signals, improving the signal transmission response speed and stability, improving the response rate and stability of the thyristor, and meeting the growing demand for hydrogen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a schematic diagram of a thyristor trigger circuit provided by an embodiment of the utility model;

[0041] Figure 2 This is another schematic diagram of a thyristor trigger circuit provided by an embodiment of the utility model;

[0042] Figure 3 It is a rectifier circuit involved in a hydrogen production power supply provided by an embodiment of the utility model;

[0043] Figure 4 A heat dissipation unit involved in a hydrogen production power supply provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In the present application, the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "comprise one ..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. In addition, the terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable in appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here, for example.

[0046] The embodiment of the present application provides a thyristor trigger circuit, which is used to solve the problem in the prior art that the controller is easily susceptible to electromagnetic interference during the process of outputting electrical signals, which leads to certain limitations in response speed and stability and makes it difficult to meet the growing demand for hydrogen production.

[0047] See also Figure 1 The trigger circuit of the thyristor includes: a light splitting module and N triggering boards; N is the number of thyristors required to be triggered.

[0048] It should be noted that the thyristors to be triggered are thyristors that are connected in parallel and need to be synchronously controlled. The trigger circuit provided in this application can convert one optical signal into multiple synchronous optical signals, and these optical signals act on the thyristors through corresponding trigger boards, thereby realizing synchronous triggering control of multiple thyristors.

[0049] The optical signal end of the controller is connected to the input end of the optical splitter module through an optical fiber.

[0050] The N output ends of the light splitting module are connected to the input ends of the N trigger boards in a one-to-one correspondence through optical fibers.

[0051] The optical splitter module can split an optical signal into multiple optical signals.

[0052] The N trigger plates correspond one to one to the N thyristors.

[0053] The output end of each trigger board is connected to the control end of the corresponding thyristor.

[0054] The optical signal port of the controller is connected to the input port of the splitter module through optical fiber, realizing efficient signal transmission. The splitter module has N output terminals, which are connected to the input terminals of N trigger boards one by one through optical fiber, ensuring accurate signal distribution. The output terminal of each trigger board is connected to the control terminal of a thyristor, forming a precise control chain.

[0055] Specifically, the optical signal end of the controller first sends out an optical signal, which is quickly transmitted to the input end of the optical splitter module through optical fiber. The optical splitter module then distributes the received optical signal to each output port, and each port transmits the signal to the corresponding trigger board input end through optical fiber. Finally, after receiving the optical signal, the trigger board triggers the corresponding thyristor to complete the entire control process.

[0056] In this embodiment, the trigger circuit between the controller and the thyristor adopts a splitter module and a trigger board; then, when the thyristor needs to be controlled, the controller outputs an optical signal, which is transmitted to the splitter module and the trigger board in sequence through the optical fiber, and the trigger board triggers the thyristor; that is, the control signal is transmitted in the form of an optical signal, avoiding additional interference caused by the transmission of electrical signals, improving the response speed and stability of signal transmission, and improving the response rate and stability of thyristors to meet the growing demand for hydrogen production.

[0057] The conduction process of the thyristor can be precisely controlled by using a photoelectric conversion trigger board. Specifically, whenever the control circuit of the trigger board receives light signal pulses from the controller, the device quickly converts these light signal pulses into electrical signal pulses. Subsequently, these electrical signal pulses pass through an enhanced trigger circuit to enhance their signal strength, ensuring that the signal can act stably and forcefully on the target thyristor, thereby causing it to conduct smoothly.

[0058] However, the original design of the photoelectric conversion trigger board was mainly for the scenario of controlling a single thyristor with a single optical signal pulse. In complex application scenarios, such as when the controller needs to send optical signals to multiple trigger boards at the same time to control multiple thyristors connected in parallel on the same bridge arm, problems arise. If the optical signal sent by the controller is not synchronized in timing or has differences in signal strength, then these tiny errors will directly affect the synchronous triggering of the parallel thyristors.

[0059] This asynchronous triggering may cause the current distribution in the bridge arm to become uneven, and some thyristors may be turned on before other thyristors, thus bearing a larger current load. In extreme cases, if a thyristor fails to turn on in time for some reason, while the other thyristors are already in the on state, the non-conducting thyristor may be forced to bear the current of the entire bridge arm, resulting in serious consequences such as overheating or even burning.

[0060] This embodiment adopts a trigger circuit combining a splitter module and a trigger board. The splitter module can split one signal into multiple signals, avoiding the problem of uneven current in the bridge arm caused by inconsistent timing or intensity of the light-emitting signal under the controller; realizing synchronous control of each thyristor and improving the stability and safety of the protection system.

[0061] Optionally, the light splitting module includes: a light splitting board.

[0062] The input end of the light splitter board serves as the input end of the light splitter module and is connected to the optical signal end of the controller.

[0063] Each output end of the light splitting board serves as an output end of the light splitting module and is connected to an input end of each trigger board.

[0064] Specifically, the optical signal of the controller is transmitted to the optical splitter board, which splits the optical signal into multiple optical signals and transmits the multiple optical signals to multiple trigger boards, which trigger the thyristors according to the optical signals.

[0065] The spectrometer can be understood as a circuit board provided with a spectrometer; the circuit board used to implement the spectrometer can include a photoelectric conversion circuit, etc.

[0066] Optionally, the optical splitter board includes: an optical signal transceiver, N optical-to-electrical circuits and N electrical-to-optical circuits.

[0067] The input end of the optical signal transceiver serves as the input end of the beam splitter and is connected to the optical signal end of the controller.

[0068] The output ends of the optical signal transceiver are respectively connected to the optical signal ends of the N optical-to-electrical circuits.

[0069] The optical signal transceiver receives the optical signal from the controller and sends it to each optical-to-electrical circuit, and the optical-to-electrical circuit converts the optical signal into an electrical signal.

[0070] A photoelectric circuit is a circuit that converts light energy (optical signal) into electrical energy (electrical signal). The working principle of this circuit is mainly based on the photoelectric effect, that is, when light shines on a material with the photoelectric effect, the photons will excite the electrons in the material, causing them to jump into the conduction band, thereby generating charge carriers. These charge carriers move under the action of the electric field force, thereby forming an electric current, realizing the conversion of light energy into electrical energy.

[0071] The electrical signal ends of the N optical-to-electrical circuits are connected to the electrical signal ends of the N electrical-to-optical circuits in a one-to-one correspondence.

[0072] The optical signal ends of the N electrical-to-optical circuits are all used as an output end of the beam splitter board and connected to the output end of the corresponding trigger board.

[0073] Specifically, the optical signal end of the first electro-optical conversion circuit serves as the first output end of the spectrometer board and is connected to the input end of the first trigger board; the optical signal end of the second electro-optical conversion circuit serves as the second output end of the spectrometer board and is connected to the input end of the second trigger board; and so on and so forth, the optical signal end of the Nth electro-optical conversion circuit serves as the Nth output end of the spectrometer board and is connected to the input end of the second trigger board.

[0074] An electro-optical circuit is a circuit that converts electrical energy (electrical signal) into light energy (optical signal). It works based on the electroluminescent effect, that is, when an electric current passes through a specific substance, the electrons in the substance are excited to a high energy state, and when these electrons fall back to a low energy state, they release energy, part of which is radiated in the form of photons, thereby generating light energy. The core components in the electro-optical circuit are light-emitting elements, such as light-emitting diodes (LEDs), lasers, etc. These elements can emit light of a specific wavelength after being powered on. The specific structure of the electro-optical circuit will not be described one by one here, as long as it can achieve the conversion of electrical signals into optical signals, it is within the scope of protection of this application.

[0075] In this embodiment, one optical signal is converted into multiple synchronous optical signals, thereby achieving synchronous triggering control of multiple thyristors and improving the stability and response efficiency of the system in which the thyristors are located.

[0076] Optional, see Figure 2 , the optical splitting module includes: an optical splitter.

[0077] The input end of the optical splitter serves as the input end of the optical splitting module and is connected to the optical signal end of the controller.

[0078] Each output end of the optical splitter is connected to the input end of each trigger board through an optical fiber.

[0079] The first output end of the optical splitter is connected to the input end of the first trigger board through the first optical fiber; the second output end of the optical splitter is connected to the input end of the second trigger board through the second optical fiber; the Nth output end of the optical splitter is connected to the input end of the Nth trigger board through the Nth optical fiber. That is, one input fiber of the optical splitter is connected to the optical signal end of the controller, and the two output fibers of the optical splitter are connected to the input end of the trigger board. When the controller sends out one optical signal, it is evenly split into two optical signals through the optical splitter. At this time, the input fiber and the output fiber of the optical splitter are both optical fibers, and the additional optical fiber can be omitted.

[0080] A beam splitter is an optical device, also known as an optical splitter or OBD (Optical Beam Divider), which is a passive device. It is mainly composed of incident and exit slits, reflectors and dispersive elements (such as gratings), etc. It has multiple input ports and multiple output ports and is often used for coupling, branching and distribution of optical signals.

[0081] Since the optical splitter is a passive device, it does not require external energy and can work as long as there is input light. The optical splitter can distribute the optical signal and then realize synchronous control; that is, the thyristors will be synchronously controlled through the trigger board.

[0082] An optical splitter can split an input optical signal into two or more output optical signals, and the optical input power is evenly distributed on all output ports. For example, an optical splitter with a splitting ratio of 1:4 can divide an optical signal into four equal parts and then transmit them in four different channels. An optical splitter can efficiently split an incident beam of light into multiple beams, improving the efficiency of optical experiments and applications.

[0083] The optical splitter can be an FBT (Fused Biconical Taper) splitter or a PLC (Planar Lightwave Circuit) splitter; the FBT splitter uses the fusion stretching technology to bundle and stretch two or more optical fibers to achieve the distribution of optical signals. This type of splitter has the variability of splitting, and the splitting ratio can be adjusted as needed. The PLC splitter is an integrated waveguide optical power distribution device based on a quartz substrate and is manufactured using semiconductor process technology. The PLC splitter has good splitting consistency and good channel uniformity, and is the first choice for PON (Passive Optical Network) construction.

[0084] In other words, the optical splitter directly divides one optical signal into multiple optical signals, and no photoelectric conversion is required inside the optical splitter, and no power supply is required, which is simple and efficient.

[0085] Optionally, the optical splitter is a one-to-two optical splitter, and N is 2. Of course, the optical splitter may also be other one-to-multiple optical splitters, which will not be described in detail here, as long as they can match the thyristor, they are all within the protection scope of this application.

[0086] It should be noted that the splitter board includes a photoelectric conversion circuit, which converts one optical signal into multiple electrical signals and then converts the multiple electrical signals into optical signals, which are connected to the trigger board through optical fibers; while the splitter has no conversion circuit and can directly split one optical signal into multiple optical signals without any conversion link. The splitter does not require external energy and can work as long as there is an input optical signal.

[0087] Take the one-to-two splitting requirement as an example. The one-to-two splitter: The cost of the one-to-two splitter is about 100 yuan; the one-to-two splitter board: The cost of the device for one optical signal input acquisition port and two optical signal transmission ports is about 240 yuan; the cost of the photoelectric conversion circuit device and PCB board is about 200 yuan, and the cost of adding 2 optical fibers is about 30 yuan, totaling about 470 yuan; the splitter can save 370 yuan just from the material cost. And because of the existence of the conversion circuit, the splitter board needs to be powered additionally, which increases energy consumption. Therefore, the splitter has the advantages of being more economical and low energy consumption compared to the splitter board.

[0088] In this embodiment, a low-cost beam splitter is used to replace the beam splitter board, which significantly reduces the cost of the trigger circuit.

[0089] The trigger circuit of the thyristor can be applied to multiple fields, such as hydrogen production, AC / DC voltage and speed regulation, etc. The hydrogen production field is used as an example for illustration.

[0090] As the world pays more and more attention to renewable energy and clean energy, hydrogen energy, with its clean and efficient characteristics, has gradually risen in the energy field and become a key link in the future energy structure. As one of the core paths of the hydrogen energy industry, water electrolysis hydrogen production technology has attracted much attention due to its significant advantages such as zero carbon emissions and abundant raw material resources. However, in the pursuit of high-efficiency, large-scale water electrolysis hydrogen production, the stable operation and high reliability of the hydrogen production power supply have become the key bottleneck affecting the overall efficiency.

[0091] In response to the specific needs of high-power electrolytic hydrogen production, a special high-power hydrogen production power supply solution has been designed, and its power level usually spans to the megawatt (MW) level. The core technology of this solution still relies on thyristor rectification technology, but it has been deeply optimized for high-power applications, including more complex circuit architecture design and higher-specification power device selection to ensure stable and efficient energy conversion.

[0092] In a low-voltage, high-current working environment, a strategy of connecting multiple thyristors in parallel is adopted to disperse and bear the huge current load. This design ensures that even if one of the thyristors encounters a fault (such as overload, short circuit, etc.), the remaining thyristors can continue to operate, thereby maintaining the stable operation and reliability of the entire circuit, greatly improving the fault tolerance of the system and effectively preventing system paralysis caused by single-point failures.

[0093] In order to ensure that the parallel-connected thyristors can work together stably and efficiently, a series of key technical measures are taken to prevent and solve potential problems.

[0094] Based on this, another embodiment of the present application also provides a hydrogen production power source.

[0095] The hydrogen production power supply comprises: a controller, a rectifier circuit and a trigger circuit.

[0096] The specific structure and working principle of the trigger circuit are detailed in the trigger circuit of the thyristor provided in the above embodiment, which will not be described here one by one, and all are within the protection scope of this application.

[0097] At least one half-bridge in the rectifier circuit has at least two thyristors connected in parallel.

[0098] Each output end of the trigger circuit is connected to the control end of each thyristor in the same half bridge in a one-to-one correspondence; the trigger circuit is controlled by the optical signal of the controller.

[0099] That is, the controller transmits an optical signal to the trigger circuit, and the trigger circuit controls the states of the thyristors of the same half bridge according to the optical signal.

[0100] Specifically, the output end of the rectifier circuit serves as the output end of the hydrogen production power supply, and the hydrogen production system provides power. The hydrogen production system may include a rectifier transformer, a hydrogen production power supply, a hydrogen production module, a purification module, and a hydrogen storage tank, etc. Specifically, one end of the rectifier transformer is connected to the power grid, and the other end of the rectifier transformer is connected to the input end of the hydrogen production power supply; the output end of the hydrogen production power supply is connected to the input end of the hydrogen production module; the output end of the hydrogen production module is connected to the hydrogen storage tank through the purification module. The hydrogen production module can be a water electrolysis hydrogen production module, or other hydrogen production methods.

[0101] There can be multiple or one trigger circuits; generally, the number of trigger circuits is consistent with the number of half-bridges that need to be synchronously controlled; for example, if two half-bridges need to be synchronously controlled, the number of trigger circuits is 2; one trigger circuit is used to control the synchronous control of each thyristor in one half-bridge, and the other trigger circuit is used to control the synchronous control of each thyristor in the other half-bridge.

[0102] In this embodiment, a controller is used to transmit an optical signal to a trigger circuit, so that the trigger circuit triggers each thyristor of the same half bridge, thereby realizing synchronous control of each thyristor of the same half bridge; and optical signal transmission is used to avoid electromagnetic interference, thereby improving the stability and response efficiency of the hydrogen production power supply.

[0103] Optional, see Figure 3 , the rectifier circuit includes: a three-phase bridge arm, an inductor L1 and a resistor R1.

[0104] The inductor L1 and the resistor R1 form a series branch.

[0105] The first end of each phase bridge arm is connected to one end of the series branch.

[0106] The second end of each phase bridge arm is connected to the other end of the series branch.

[0107] Specifically, one end of the inductor L1 is connected to the first end of each phase bridge arm as the first end of the series branch; the other end of the inductor L1 is connected to one end of the resistor R1; the other end of the resistor R1 is connected to the second end of the bridge arm of each phase as the second end of the series branch. Of course, the inductor L1 and the resistor R1 can be swapped, which will not be described here one by one, and are all within the protection scope of this application.

[0108] The midpoints of the three-phase bridge arms correspond one-to-one to the three-phase AC power sources.

[0109] The midpoint of each phase bridge arm is connected through the positive pole of the corresponding AC power source.

[0110] The negative pole of the three-phase AC power supply is connected.

[0111] like Figure 3 As shown, eA, eB and eC constitute a three-phase AC power supply.

[0112] A three-phase AC power supply is a power supply composed of three AC potentials with the same frequency, equal amplitude, and phases that are 120 degrees electrical angle apart.

[0113] The bridge arm comprises an upper half bridge and a lower half bridge; the connection point between the upper half bridge and the lower half bridge serves as the midpoint of the bridge arm and is connected to the positive pole of the corresponding AC power supply.

[0114] Specifically, the first end of the upper half bridge serves as the first end of the bridge arm; the second end of the upper half bridge is connected to the first end of the lower half bridge, and the connection point serves as the midpoint of the bridge arm; the second end of the lower half bridge serves as the second end of the bridge arm.

[0115] Each half bridge is equipped with at least one thyristor, the anode of the thyristor is connected to the second end of the half bridge, and the cathode of the thyristor is connected to the first end of the half bridge. When there are two or more thyristors in the half bridge, the thyristors are connected in parallel.

[0116] like Figure 3 As shown, VT11, VT12, VT41, VT42, VT11, VT12, VT41, VT42, VT51, VT52, VT21 and VT22 are all thyristors.

[0117] VT11, VT12, VT41 and VT42 are in the same bridge arm, wherein VT11 and VT12 are in the upper half bridge, and VT41 and VT42 are in the lower half bridge.

[0118] VT11, VT12, VT41 and VT42 are in the same bridge arm, among which VT31 and VT32 are in the upper half bridge, and V61 and VT62 are in the lower half bridge.

[0119] VT51, VT52, VT21 and VT22 are in the same bridge arm, wherein VT51 and VT52 are in the upper half bridge, and VT21 and VT22 are in the lower half bridge.

[0120] The gate of each thyristor is connected to the output terminal of the trigger board as a control terminal.

[0121] Optionally, each upper half bridge and each lower half bridge are provided with N thyristors connected in parallel.

[0122] The selection of thyristors is crucial, and the thyristors must meet the system's requirements for power and current handling capabilities. The specific selection of thyristors is not specifically limited here, and can be determined based on actual conditions, all of which are within the scope of protection of this application.

[0123] To ensure the consistency of the electrical characteristics of the thyristors, thyristors with similar state electrical characteristics (such as forward voltage drop, reverse breakdown voltage, etc.) and dynamic electrical characteristics (such as switching speed, switching loss, etc.) can be selected to achieve uniform current distribution of each thyristor on the same half bridge and improve the overall performance of the circuit. Specifically, the thyristors on the same half bridge can be thyristors of the same brand, model and parameters to ensure that the current can be evenly distributed to each thyristor.

[0124] The parallel use of thyristors achieves uniform distribution of current, reduces the load pressure of a single device, reduces the risk of overheating and damage caused by long-term high-load operation, and significantly enhances the overall reliability of the circuit. When the parallel thyristors have similar characteristics, they can work together and share the current, reducing the current density of each thyristor, thereby reducing the conduction loss and improving the energy conversion efficiency of the entire circuit.

[0125] It is also possible to add a current sharing circuit based on each thyristor. Specifically, a current sharing resistor is connected in series at each thyristor, and the current sharing resistors corresponding to each thyristor are in the same half bridge. The current distribution between each thyristor can be adjusted by the resistance value of the current sharing resistor to make it tend to be balanced.

[0126] The current balancing circuit may also be in other forms, which will not be described in detail here, and are all within the protection scope of this application.

[0127] The purpose of setting the current balancing circuit is to balance the current distribution among the parallel thyristors, prevent the risk of thermal imbalance and damage caused by excessive current on individual thyristors, improve the stability of the system, and extend the service life of the thyristors.

[0128] Thyristors generate a certain amount of heat when working. If the heat dissipation is poor, the heat will continue to accumulate, causing the temperature of the thyristor to rise. High temperature will accelerate the aging and damage of the internal materials of the thyristor, reduce its electrical performance, and even cause failure. Therefore, reasonable heat dissipation design is crucial to ensure the long-term stable operation of the thyristor.

[0129] In order to ensure that the thyristor maintains a suitable temperature during operation, a heat dissipation unit is also included.

[0130] The heat dissipation unit can be used to dissipate heat for a hydrogen production power source, and more specifically, can dissipate heat for each thyristor.

[0131] Optionally, the heat dissipation unit includes: a water-cooled heat dissipation unit and / or an air-cooled heat dissipation unit.

[0132] like Figure 4 As shown, the water-cooling heat dissipation unit may include a water-cooling row and a water-cooling pack, and various thyristors are arranged between the water-cooling row and the water-cooling pack.

[0133] Water cooling is an efficient way of heat dissipation, which uses the high specific heat capacity and fluidity of water to absorb and remove heat. In the parallel circuit of thyristors, a special water cooling system can be designed to circulate cooling water around the thyristors through water pipes, and use the heat exchange between water and thyristors to reduce their temperature. Water cooling has the advantages of good heat dissipation effect and precise temperature control.

[0134] Air cooling is another common heat dissipation method, which uses the forced airflow generated by the fan to remove the heat generated by the thyristor. In the thyristor parallel circuit, an air duct and a fan can be set around the thyristor. The rotation of the fan generates a strong airflow to quickly remove the heat on the surface of the thyristor. Air cooling has the advantages of simple structure and easy maintenance.

[0135] The features recorded in the various embodiments in this specification can be replaced or combined with each other, and the same and similar parts between the various embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0136] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present utility model.

[0137] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thyristor trigger circuit, characterized in that: include: A light splitting module and N trigger boards; N is the number of thyristors required to be triggered; The optical signal end of the controller is connected to the input end of the optical splitting module through an optical fiber; The N output ends of the light splitting module are connected to the input ends of the N trigger boards in a one-to-one correspondence through optical fibers; N trigger plates correspond one to one with N thyristors; The output end of each trigger board is connected to the control end of the corresponding thyristor.

2. The thyristor trigger circuit according to claim 1, characterized in that: The light splitting module comprises: a light splitting plate; The input end of the light splitter plate serves as the input end of the light splitter module; Each output end of the light splitting plate serves as an output end of the light splitting module.

3. The thyristor trigger circuit according to claim 2, characterized in that: The optical splitter includes: an optical signal transceiver, N optical-to-electrical circuits and N electrical-to-optical circuits; The input end of the optical signal transceiver serves as the input end of the beam splitter; The output end of the optical signal transceiver is respectively connected to the optical signal ends of the N optical-to-electrical circuits; The electrical signal ends of the N optical-to-electrical circuits are connected to the electrical signal ends of the N electrical-to-optical circuits in a one-to-one correspondence; The optical signal ends of the N electrical-to-optical circuits all serve as an output end of the beam splitter.

4. The thyristor trigger circuit according to claim 1, characterized in that: The optical splitting module comprises: an optical splitter; The input end of the optical splitter serves as the input end of the optical splitting module; Each output end of the optical splitter is connected to an input end of each trigger board through an optical fiber.

5. The thyristor trigger circuit according to claim 4, characterized in that: The optical splitter is a one-to-two optical splitter; and N is 2.

6. A hydrogen production power source, characterized in that: include: A controller, a rectifier circuit and a trigger circuit as claimed in any one of claims 1 to 5; At least one half-bridge in the rectifier circuit has at least two thyristors connected in parallel; Each output terminal of the trigger circuit is connected to the control terminal of each thyristor in the same half bridge in a one-to-one correspondence; The trigger circuit is controlled by the optical signal of the controller.

7. The hydrogen production power source according to claim 6, characterized in that: The rectifier circuit comprises: a three-phase bridge arm, an inductor and a resistor; The inductor and the resistor form a series branch; The first end of each phase bridge arm is connected to one end of the series branch; The second end of each phase bridge arm is connected to the other end of the series branch; The midpoints of the three-phase bridge arms correspond one-to-one to the three-phase AC power supply; The midpoint of each phase bridge arm is connected through the positive pole of the corresponding AC power source; The negative pole of the three-phase AC power supply is connected; The bridge arm comprises an upper half bridge and a lower half bridge; the connection point between the upper half bridge and the lower half bridge serves as the midpoint of the bridge arm.

8. The hydrogen production power source according to claim 7, characterized in that: Each of the upper half bridges and each of the lower half bridges is provided with N thyristors connected in parallel.

9. The hydrogen production power source according to claim 6, characterized in that: A heat dissipation unit is also included.

10. The hydrogen production power source according to claim 9, characterized in that: The heat dissipation unit includes: a water-cooling heat dissipation unit and / or an air-cooling heat dissipation unit.

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