High-pressure control system suitable for laboratory high-pressure heater

Abstract

The utility model discloses a high-voltage control system suitable for a laboratory high-voltage heater, which comprises a PLC control system, a low-voltage power adjusting system is connected with the PLC control system, the PLC control system and the low-voltage power adjusting system are both connected with a boost transformation system, the PLC control system and the boost transformation system are both connected with a high-voltage power supply system, and the high-voltage power supply system is connected with a power supply system. According to the utility model, the boost transformation system is used as a high-voltage 6KV output voltage, a high-voltage substation does not need to be built, the investment output and the construction period of equipment are reduced, the research and development time for researching and developing the high-voltage heater in a laboratory is greatly shortened, meanwhile, the number of power distribution cabinets is reduced, and the occupied area of a power distribution room is reduced; meanwhile, the equipment size is shortened, and the equipment investment is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage control of heaters, and in particular relates to a high-voltage control system suitable for a laboratory high-voltage heater. Background Art

[0002] Existing electric heaters normally use low voltage control systems below 690V, so the task of developing high voltage heaters is urgent, and the development of 6KV or 10KV heaters is particularly important.

[0003] The power supply of a conventional laboratory is only 380V, and the heater under development has a high voltage of more than 6KV. If we use the conventional method to lay overhead lines from the municipal power grid to the laboratory and apply for high-voltage electricity from the power supply department, we need to rebuild the high-voltage distribution room and high-voltage power supply cabinets, electrical measurement PT cabinets and other equipment. The investment and construction cycle of high-voltage electricity are relatively high and long, which is not cost-effective. Since the power of the laboratory test heater is below 100KW, the cycle of developing the heater is also relatively short. In order to solve the problem of high-voltage power supply, we propose a high-voltage control system suitable for laboratory high-voltage heaters. Utility Model Content

[0004] The purpose of the utility model is to provide a high-voltage control system suitable for a laboratory high-voltage heater to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a high-voltage control system suitable for a laboratory high-voltage heater, comprising:

[0006] A PLC control system, the PLC control system is used to issue high voltage control instructions;

[0007] A low-voltage power regulation system, which is connected to the PLC control system and is used to receive high-voltage control instructions issued by the PLC control system and output a voltage of 0-380V;

[0008] A boost transformer system, the PLC control system and the low voltage power regulation system are both connected to the boost transformer system, the boost transformer system is used to receive the 0-380V voltage output by the low voltage power regulation system, and is also used to boost the 0-380V voltage to output a 0-6KV voltage;

[0009] A high-voltage power supply system, the PLC control system and the step-up transformer system are both connected to the high-voltage power supply system, the high-voltage power supply system is used to receive the 0-6KV voltage output by the step-up transformer system, and is also used to control the on-off of the high-voltage power supply circuit;

[0010] A high-voltage heater is connected to the high-voltage power supply system, and the high-voltage heater is heated by the high-voltage power supply output by the high-voltage power supply system.

[0011] Preferably, the PLC control system comprises a PLC unit, a temperature thermocouple unit, a relay unit and a touch screen HMI unit, and the temperature thermocouple unit, the relay unit and the touch screen HMI unit are all connected to the PLC unit;

[0012] The temperature thermocouple unit is connected to the high-voltage heater;

[0013] The low-voltage power regulation system, the boost transformation system and the high-voltage power supply system are all connected to the PLC unit.

[0014] Preferably, the PLC unit includes a CPU module, a DI input module, a DO output module, an AI input module, an AO output module and an industrial switch;

[0015] The CPU module, the DI input module, the DO output module, the AI ​​input module and the AO output module are connected, the CPU module is connected to the industrial switch, and the industrial switch is connected to the touch screen HMI unit.

[0016] Preferably, the low voltage power regulation system comprises a molded case circuit breaker, a first current transformer, a first electrical multifunctional meter, a power regulator fast fuse, a power regulator thyristor and a first contactor;

[0017] The molded case circuit breaker is connected to the first current transformer, the first electrical multi-function meter and the power regulator fast fuse are both connected to the first current transformer, the power regulator fast fuse is connected to the power regulator thyristor, and the power regulator thyristor is connected to the first contactor.

[0018] Preferably, the step-up transformer system comprises a transformer winding unit, a zero-sequence current transformer unit, a grounding unit, a temperature control unit, a second contactor and a heat dissipation fan;

[0019] The zero-sequence current transformer unit, the temperature control unit and the second contactor are all connected to the transformer winding unit, the transformer winding unit is connected to the grounding unit, and the temperature control unit and the second contactor are all connected to the heat dissipation fan.

[0020] Preferably, the high-voltage power supply system includes a vacuum circuit breaker, a second current transformer, a fuse, a voltage transformer, a grounding switch, a high-voltage display, a lightning arrester, a microcomputer comprehensive protection and a second electrical multi-function meter;

[0021] The vacuum circuit breaker is connected to the second current transformer, the fuse, the lightning arrester, the microcomputer comprehensive protection and the second electrical multi-function meter are all connected to the second current transformer, the microcomputer comprehensive protection and the second electrical multi-function meter are all connected to the voltage transformer, the fuse is connected to the voltage transformer, and the voltage transformer is connected to the grounding switch.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] The utility model low-voltage power regulation system receives a high-voltage control instruction from a PLC control system, and outputs a voltage of 0-380V to a step-up transformer system, which steps up the voltage of 0-380V to a high voltage of 0-6KV through the step-up transformer system, and then outputs the high-voltage power supply to the high-voltage heater through the high-voltage power supply. The high-voltage heater performs high-voltage heating through the high-voltage power supply, and the high-voltage power supply system provides a protection function for the high-voltage power supply. The PLC control system collects the temperature thermocouple signal on the high-voltage heater through the temperature thermocouple unit and executes the calculation result, and outputs the calculation result to the relay unit and the touch screen HMI unit. It is suitable for laboratories to control the stable output of high-voltage heaters under low-voltage conditions, and ensure that the control system can accurately control the output of the heater temperature. The step-up transformer system is used as the high-voltage 6KV output voltage, and there is no need to build a high-voltage substation, which reduces the investment output and construction period of the equipment, greatly shortens the research and development time of the laboratory for high-voltage heaters, and reduces the number of distribution cabinets, reduces the floor space of the distribution room, and shortens the volume of the equipment, greatly reducing the investment in the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the system principle of the utility model;

[0025] Figure 2 A network topology diagram of the PLC unit of the utility model;

[0026] Figure 3 It is the circuit principle diagram of the low voltage power regulation system of the utility model;

[0027] Figure 4 It is a circuit principle diagram of the boost and voltage conversion system of the utility model;

[0028] Figure 5 This is a circuit schematic diagram of the high voltage power supply system of the utility model;

[0029] Figure 6 The voltage, current and electric energy measurement circuit diagram of the high voltage power supply system of the utility model;

[0030] Figure 7 This is a control protection circuit diagram of the high voltage power supply system of the utility model.

[0031] In the figure: 1. PLC control system; 101. PLC unit; 1011. CPU module; 1012. DI input module; 1013. DO output module; 1014. AI input module; 1015. AO output module; 1016. Industrial switch; 102. Temperature thermocouple unit; 103. Relay unit; 104. Touch screen HMI unit; 2. Low voltage power regulation system; 201. Molded case circuit breaker; 202. First current transformer; 203. First electrical multi-function meter; 204. Power regulator fast fuse; 205. Power regulator controllable Silicon; 206, first contactor; 3, step-up transformer system; 301, transformer winding unit; 302, zero-sequence current transformer unit; 303, grounding unit; 304, temperature control unit; 305, second contactor; 306, cooling fan; 4, high-voltage power supply system; 401, vacuum circuit breaker; 402, second current transformer; 403, fuse; 404, voltage transformer; 405, grounding switch; 406, high-voltage display; 407, lightning arrester; 408, microcomputer comprehensive protection; 409, second electrical multi-function meter; 5, high-voltage heater. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0033] See also Figure 1-Figure 5 The utility model provides a high-voltage control system suitable for a laboratory high-voltage heater, comprising:

[0034] PLC control system 1, PLC control system 1 is used to issue high-voltage control instructions, PLC control system 1 includes PLC unit 101, temperature thermocouple unit 102, relay unit 103 and touch screen HMI unit 104, temperature thermocouple unit 102, relay unit 103 and touch screen HMI unit 104 are all connected to PLC unit 101; temperature thermocouple unit 102 is connected to high-voltage heater 5; low-voltage power regulation system 2, boost transformer system 3 and high-voltage power supply system 4 are all connected to PLC unit 101 , the PLC unit 101 includes a CPU module 1011, a DI input module 1012, a DO output module 1013, an AI input module 1014, an AO output module 1015 and an industrial switch 1016; the CPU module 1011, the DI input module 1012, the DO output module 1013, the AI ​​input module 1014 and the AO output module 1015 are connected, the CPU module 1011 is connected to the industrial switch 1016, and the industrial switch 1016 is connected to the touch screen HMI unit 104;

[0035] The PLC unit is the core of the PLC control system 1 of the heater and is responsible for the control task of the entire PLC control system 1. The PLC control system 1 collects the temperature thermocouple signal of the high-voltage heater 5 through the temperature thermocouple unit 102, performs PID operation control algorithm according to the temperature target value of the high-voltage heater 5, performs operation processing with the set target temperature value, and outputs the optimal power output data. The PLC unit 101 performs logical operations on the collected current and voltage signals, compares them with the set protection data, and shuts off the power output data in time when the current and voltage signals are detected to be abnormal, ensuring that the thyristor is shut down in time. The PLC unit 101 refers to the pre-stored reference value, and performs analog input, calculation point, average value, change rate, and other The system can scan and compare the transformed values ​​to distinguish the abnormal, normal or changed status. If a certain point is confirmed to have exceeded the preset limit, the touch screen HMI unit 104 will display an alarm screen and send out a sound signal. The alarm display should be arranged in chronological order, and the latest alarm should be displayed at the top of the alarm screen. Each alarm point can have 6 different priorities, and the variables of the point are displayed in 6 different colors to distinguish them. The system status display should indicate the status of each station connected to the data communication bus through the touch screen HMI unit 104. The operating status of all I / O modules in each station should be included in the system status display. If any station or module fails, the corresponding status display screen should change color and brightness to cause the operation to stop. Attention of operators: PLC control system 1 has interlock protection function to prevent wrong and dangerous actions of control system. Interlock protection system should provide maximum flexibility for maintenance, testing and correction when process equipment is in safe working condition. When PLC control system 1 is in forced locking, restriction or other override action, the affected part of PLC control system 1 should be tracked accordingly and no longer continue its integral action (integral saturation). For some important key parameters, triple redundant transmitters will be used for measurement. For the triple redundant measurement values, PLC control system 1 should automatically select the median as the controlled variable, and the values ​​measured by the remaining transmitters, if the deviation from the median signal exceeds the preset range, an alarm should be issued. If the deviation between the remaining two signals and the median signal exceeds the preset range, an alarm should be issued. When the deviations of all the signals exceed the limit and alarm is sounded, the affected part of PLC control system 1 shall be switched to manual mode. PLC control system 1 shall monitor the deviation between the set value and the controlled variable. When the deviation exceeds the predetermined range, PLC control system 1 shall switch the control to manual mode and alarm. The control design shall meet the following requirements: Ensure that the protection signal has higher priority than the manual command (local and remote) and the automatic command. In order to prevent the command from appearing simultaneously or repeatedly, the command can be locked to prevent misoperation. If a protection trip occurs, the circuit breaker will not be closed until the fault is eliminated (motor protection, pump idling protection, etc.). Provide each drive control module with strong internal / external diagnostic functions, such as: drive mechanism trip (switching device failure), power failure, module hardware / software interference, line break failure,When a fault occurs in a certain step, the PLC control system 1 should automatically stop the program and limit the impact of the fault to the step of the program. The program can only continue after the fault is eliminated. The necessary interlocking is set according to the operating conditions of the process. Effective interlocking can automatically cut off the equipment under accident conditions. In addition, the accident condition is immediately notified to the operating personnel through the alarm system and printed through the printer. All switch status signals, electrical accident signals and warning signals are sent to the PLC unit. All procedures display electrical continuous quantity signals (current, voltage, power, etc.) on the touch screen HMI unit 104, bus voltage and bus current of the high-voltage power supply system 4; operating parameters of the low-voltage power regulation system 2; temperature display data of the temperature thermocouple unit 102, closing and tripping status of high-voltage circuit breakers and contactors, and disappearance of control power supply;

[0036] A low-voltage power regulation system 2, which is connected to the PLC control system 1. The low-voltage power regulation system 2 is used to receive a high-voltage control instruction issued by the PLC control system 1 and output a voltage of 0-380V. The low-voltage power regulation system 2 includes a molded case circuit breaker 201, a first current transformer 202, a first electrical multifunctional meter 203, a power regulator fast fuse 204, a power regulator thyristor 205 and a first contactor 206; the molded case circuit breaker 201 is connected to the first current transformer 202, the first electrical multifunctional meter 203 and the power regulator fast fuse 204 are both connected to the first current transformer 202, the power regulator fast fuse 204 is connected to the power regulator thyristor 205, and the power regulator thyristor 205 is connected to the first contactor 206;

[0037] The incoming line side of the molded case circuit breaker 201 serves as the input side of the entire high-voltage control system. The first contactor 206 serves as the secondary protection of the power regulator to prevent the power regulator from losing control and provide the final protection. The control of the power regulator is given by the PLC unit 101. The first electrical multifunction meter 203 is responsible for sampling the voltage and current signals, and sending the secondary signals to the main control board for logical judgment conditions. When the current signal is detected to exceed the preset value, the thyristor is automatically turned off. The voltage regulation design of 3 groups of thyristors in anti-parallel connection is adopted. Each phase of the main circuit of this low-voltage power regulation system 2 adopts anti-parallel thyristors and voltage-sharing auxiliary components. The main control board controls the thyristors of each phase to be turned on and off at the same time through optical fiber isolation triggering, so as to adjust the output voltage, current and power of the valve group power supply. The voltage-sharing auxiliary components are composed of static and dynamic voltage-sharing circuits, which ensure that the off-state voltage of each group of anti-parallel thyristors is uniform. The thyristors are controlled by the main control board PCB. The main control board controls the conduction angle of the thyristor output 0-100% through external start and stop instructions and power given command source;

[0038] The step-up transformer system 3, the PLC control system 1 and the low-voltage power regulation system 2 are all connected to the step-up transformer system 3. The step-up transformer system 3 is used to receive the 0-380V voltage output by the low-voltage power regulation system 2, and is also used to step up the 0-380V voltage to output a 0-6KV voltage. The step-up transformer system 3 includes a transformer winding unit 301, a zero-sequence current transformer unit 302, a grounding unit 303, a temperature control unit 304, a second contactor 305 and a heat dissipation fan 306; the zero-sequence current transformer unit 302, the temperature control unit 304 and the second contactor 305 are all connected to the transformer winding unit 301, the transformer winding unit 301 is connected to the grounding unit 303, and the temperature control unit 304 and the second contactor 305 are both connected to the heat dissipation fan 306;

[0039] The step-up transformer system 3 provides 6KV voltage energy for the high-voltage heater 5. The step-up transformer system 3 is used to increase the voltage of the low-voltage power regulation system 2 from 0-380V to a high-voltage voltage of 0-6000V. The primary side of the step-up transformer system 3 is equipped with five taps, namely 6300V, 6150V, 6000V, 5850V, and 5700V. The step-up transformer system 3 has overheat protection. The step-up transformer system 3 should be equipped with a temperature display system, a temperature control protection system, and a temperature control box. When the temperature of the transformer winding unit 301 exceeds the specified value during natural air cooling (AN), an alarm will be triggered. When the temperature of the transformer winding unit 301 continues to rise, an alarm will be triggered. When the temperature is higher than the allowable value, a trip signal is output; when forced air cooling (AF) is used, the cooling fan 306 can be automatically started and stopped according to the temperature of the transformer winding unit 301. Similarly, when the temperature of the transformer winding unit 301 exceeds the specified value, an alarm is issued. When the temperature of the transformer winding unit 301 continues to rise and exceeds the allowable value, a trip signal is output. The temperature display system and the temperature control protection system measure the temperature of each winding through the temperature measuring elements pre-buried in the transformer winding unit 301. The system adopts a three-wire system with compensation. In order to select the operation mode of the cooling fan 306, a set of manually operated selection switches with automatic and manual positions should be provided.

[0040] The high-voltage power supply system 4, the PLC control system 1 and the step-up transformer system 3 are all connected to the high-voltage power supply system 4, the high-voltage power supply system 4 is used to receive the 0-6KV voltage output by the step-up transformer system 3, and is also used to control the on-off of the high-voltage power supply circuit. The high-voltage power supply system 4 includes a vacuum circuit breaker 401, a second current transformer 402, a fuse 403, a voltage transformer 404, a grounding switch 405, a high-voltage display 406, a lightning arrester 407, a microcomputer comprehensive protection 408 and a second electrical multifunctional meter 409; the vacuum circuit breaker 401 is connected to the second current transformer 402, the fuse 403, the lightning arrester 407, the microcomputer comprehensive protection 408 and the second electrical multifunctional meter 409 are all connected to the second current transformer 402, the microcomputer comprehensive protection 408 and the second electrical multifunctional meter 409 are all connected to the voltage transformer 404, the fuse 403 is connected to the voltage transformer 404, and the voltage transformer 404 is connected to the grounding switch 405;

[0041] The vacuum circuit breaker 401 mainly controls the on and off of the high-voltage power supply. When a short circuit is detected in the circuit, the high-voltage power supply is cut off in time. The vacuum circuit breaker 401 receives the start and stop command of the external controller. When a fault is detected inside the vacuum circuit breaker 401, an alarm is issued in time and its own power supply is cut off. The voltage transformer 404 converts the high voltage 6KV of the primary circuit into the low voltage 100V of the secondary circuit, and sends it to the microcomputer comprehensive protection 408 and the second electrical multifunctional meter 409 for control and detection. The second current transformer 402 converts the large current of the primary circuit into the low current 5A or 1A of the secondary circuit, and sends it to the microcomputer comprehensive protection 408 and the second electrical multifunctional meter 409 for control and detection. Control and detection are performed. The fuse 403 mainly plays a short-circuit and overload role. When a short circuit or overcurrent occurs in the circuit, the circuit is cut off to achieve protection by melting its own fuse. The microcomputer comprehensive protection 408 mainly collects the current and voltage signals in the high-voltage power supply and the operating status of the vacuum circuit breaker 401, and performs logical operations with the set protection setting value, and finally outputs the corresponding control instructions to the vacuum circuit breaker 401. The second electrical multifunctional meter 409 collects the voltage and current signals in the high-voltage power supply, and finally displays the three-phase voltage value, current value, active and reactive power value, power factor value, frequency and harmonic wave and other electrical parameter data on the second electrical multifunctional meter 409 after processing;

[0042] like Figure 6 As shown in the figure, it is the voltage, current and electric energy measurement circuit diagram of the high voltage power supply system. Figure 7 As shown in the figure, it is the control protection circuit diagram of the high voltage power supply system. Figure 6 and Figure 7 This is a specific implementation circuit of the high voltage power supply system of the utility model, which will not be described in detail here (the connection of electronic circuits is common knowledge for those skilled in the art);

[0043] The high-voltage heater 5 is connected to the high-voltage power supply system 4. The high-voltage heater 5 is heated by the high-voltage power supply output by the high-voltage power supply system 4. The high-voltage heater 5 is a load heater of multiple groups of high-voltage electric heating cores.

[0044] The medium and low voltage power regulation system 2 of the utility model receives the high voltage control instruction from the PLC control system 1, and outputs a voltage of 0-380V to the step-up transformer system 3, the voltage of 0-380V is stepped up to a high voltage of 0-6KV by the step-up transformer system 3, and then the high voltage power is output to the high voltage heater 5 by the high voltage power supply system 4, the high voltage heater 5 is heated by the high voltage power supply, the high voltage power supply system 4 provides a protection function for the high voltage power supply, the PLC control system 1 collects the temperature thermocouple signal on the high voltage heater 5 through the temperature thermocouple unit 102 and executes the calculation result, and outputs the calculation result to the relay unit 103 and the touch screen HMI unit 104, which is suitable for the laboratory to control the stable output of the high voltage heater under low voltage conditions, ensure that the control system can accurately control the output of the heater temperature, use the step-up transformer system as the high voltage 6KV output voltage, there is no need to build a high voltage substation, reduce the investment output and construction period of the equipment, greatly shorten the research and development time of the laboratory to develop the high voltage heater, and at the same time reduce the number of distribution cabinets, reduce the floor space of the distribution room, and at the same time shorten the volume of the equipment, greatly reducing the investment in the equipment.

[0045] In summary, the method of use provided in this embodiment is as follows: the low-voltage power regulation system 2 receives the high-voltage control instruction issued by the PLC control system 1, and outputs a voltage of 0-380V to the step-up transformer system 3, the 0-380V voltage is stepped up to a high voltage of 0-6KV by the step-up transformer system 3, and then the high-voltage power supply is output to the high-voltage heater 5 through the high-voltage power supply system 4, the high-voltage heater 5 performs high-voltage heating by the high-voltage power supply, the high-voltage power supply system 4 provides a protection function for the high-voltage power supply, the PLC control system 1 collects the temperature thermocouple signal on the high-voltage heater 5 through the temperature thermocouple unit 102 and executes the calculation result, and outputs the calculation result to the relay unit 103 and the touch screen HMI unit 104, which is suitable for controlling the stable output of the high-voltage heater under low-voltage conditions in the laboratory, and ensuring that the control system can accurately control the output of the heater temperature.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage control system suitable for a laboratory high-voltage heater, characterized in that: include A PLC control system (1), the PLC control system (1) being used to issue high-voltage control instructions; A low-voltage power regulation system (2), the low-voltage power regulation system (2) being connected to the PLC control system (1), the low-voltage power regulation system (2) being used to receive a high-voltage control instruction issued by the PLC control system (1) and output a voltage of 0-380V; A step-up transformer system (3), the PLC control system (1) and the low-voltage power regulation system (2) are both connected to the step-up transformer system (3), the step-up transformer system (3) is used to receive the 0-380V voltage output by the low-voltage power regulation system (2), and is also used to step up the 0-380V voltage to output a 0-6KV voltage; A high-voltage power supply system (4), the PLC control system (1) and the step-up transformer system (3) are both connected to the high-voltage power supply system (4), the high-voltage power supply system (4) is used to receive the 0-6KV voltage output by the step-up transformer system (3), and is also used to control the on and off of the high-voltage power supply circuit; a high-voltage heater (5), the high-voltage heater (5) being connected to the high-voltage power supply system (4), the high-voltage heater (5) being heated by the high-voltage power supply output by the high-voltage power supply system (4); The PLC control system (1) comprises a PLC unit (101), a temperature thermocouple unit (102), a relay unit (103) and a touch screen HMI unit (104); the temperature thermocouple unit (102), the relay unit (103) and the touch screen HMI unit (104) are all connected to the PLC unit (101); The temperature thermocouple unit (102) is connected to the high-voltage heater (5); The low-voltage power regulation system (2), the boost transformation system (3) and the high-voltage power supply system (4) are all connected to the PLC unit (101); The PLC unit (101) comprises a CPU module (1011), a DI input module (1012), a DO output module (1013), an AI input module (1014), an AO output module (1015) and an industrial switch (1016); The CPU module (1011), the DI input module (1012), the DO output module (1013), the AI ​​input module (1014) and the AO output module (1015) are connected, the CPU module (1011) is connected to the industrial switch (1016), and the industrial switch (1016) is connected to the touch screen HMI unit (104).

2. A high-voltage control system suitable for a laboratory high-voltage heater according to claim 1, characterized in that: The low-voltage power regulation system (2) comprises a molded case circuit breaker (201), a first current transformer (202), a first electrical multifunctional meter (203), a power regulator fast fuse (204), a power regulator thyristor (205) and a first contactor (206); The molded case circuit breaker (201) is connected to the first current transformer (202), the first electrical multifunction meter (203) and the power regulator fast fuse (204) are both connected to the first current transformer (202), the power regulator fast fuse (204) is connected to the power regulator thyristor (205), and the power regulator thyristor (205) is connected to the first contactor (206).

3. A high-voltage control system suitable for a laboratory high-voltage heater according to claim 1, characterized in that: The step-up transformer system (3) comprises a transformer winding unit (301), a zero-sequence current transformer unit (302), a grounding unit (303), a temperature control unit (304), a second contactor (305) and a heat dissipation fan (306); The zero-sequence current transformer unit (302), the temperature control unit (304) and the second contactor (305) are all connected to the transformer winding unit (301), the transformer winding unit (301) is connected to the grounding unit (303), and the temperature control unit (304) and the second contactor (305) are all connected to the heat dissipation fan (306).

4. A high-voltage control system suitable for a laboratory high-voltage heater according to claim 1, characterized in that: The high-voltage power supply system (4) comprises a vacuum circuit breaker (401), a second current transformer (402), a fuse (403), a voltage transformer (404), a grounding switch (405), a high-voltage display (406), a lightning arrester (407), a microcomputer integrated protection device (408) and a second electrical multi-function meter (409); The vacuum circuit breaker (401) is connected to the second current transformer (402), the fuse (403), the lightning arrester (407), the microcomputer comprehensive protection device (408) and the second electrical multifunctional meter (409) are all connected to the second current transformer (402), the microcomputer comprehensive protection device (408) and the second electrical multifunctional meter (409) are all connected to the voltage transformer (404), the fuse (403) is connected to the voltage transformer (404), and the voltage transformer (404) is connected to the grounding switch (405).

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