Control system, method and application of ten-megawatt multi-module high-voltage power supply

Abstract

The invention relates to the technical field of power electronics, and discloses a ten-megawatt multi-module high-voltage power supply control system and method and application, and the system comprises an energy storage motor side signal matching unit which is used for collecting a first output voltage signal of an energy storage motor and carrying out the DC voltage reduction processing of the first output voltage signal to obtain a first DC voltage signal; a first signal acquisition and processing unit; a high-voltage output side signal matching unit; a second signal acquisition and processing unit; an interface circuit unit; and the core controller unit is used for obtaining the number and the voltage value of the corresponding power supply modules according to the first direct-current voltage signal, the total output voltage signal of the high-voltage power supply and the heating power of the load system through conversion. According to the invention, the situation that the stability and responsivity of the output voltage of the high-voltage power supply cannot meet system requirements is avoided.

Description

Technical Field

[0001] The present invention relates to the field of power electronics technology, and in particular to a control system, method and application of a 10-megawatt multi-module high-voltage power supply. Background Art

[0002] In nuclear fusion physics experiments, heating experiments such as electron cyclotrons, low-noise, and neutral beam injection are often conducted to obtain relevant physical experimental results. Gyrotrons, klystrons, and neutral beam ion sources are key components of the heating system and are expensive. High-voltage power supplies provide the high voltage for these loads. The capacity of these power supplies is typically in the MW range, sometimes exceeding tens of MW. Due to the requirements of the heating system, these loads require voltage waveforms that differ from conventional narrow microsecond and nanosecond pulse waveforms. The heating system requires single or repetitive wide pulses with adjustable rising edges and no overshoot. Because the high-voltage power supply for the heating system not only has high voltage but also high current, the capacity of a single high-voltage power supply typically exceeds 10 MW. Furthermore, the distributed parameters of the high-voltage power supply circuit are relatively large, so overshoot is likely to occur in the output voltage of the high-voltage power supply, especially at the waveform front. To avoid this, specific control methods are needed to minimize overshoot.

[0003] Currently, the field of nuclear fusion typically uses pulse-modulated high-voltage power supplies, which consist of hundreds of power modules. Due to power device limitations, the output voltage of a single switching power module is typically limited to 800V, 400V, and 200V. To maintain the stability of the high-voltage power supply, a feedback method is often used. This conventional approach collects the voltage output of the high-voltage power supply and assumes that the output voltage of a single switching power module is stable at 800V, 400V, and 200V. By calculating the difference between the set voltage and the output voltage, the number of power modules used is adjusted to achieve the desired voltage.

[0004] The drawback of this control method is that since the electric energy required by the HL-3 fusion device comes from the energy storage motor, the energy storage motor carries a heavy load. In addition to the high-voltage power supply of the heating system, it also carries other high-power power supplies. Therefore, during the discharge period, the output voltage of the energy storage motor is extremely unstable, and the change value may even exceed 10%. Therefore, it is impossible for the output voltage of a single switching power supply module to be stable at 800V, 400V and 200V, and there will be great fluctuations. Since there are about 200 switching power supply modules in the 10-megawatt high-voltage power supply, due to the cumulative effect, when the output voltage feedback calculation is simply based on the fixed voltage of the power supply module (800V, 400V and 200V), if the output voltage of the energy storage motor fluctuates greatly, the stability and responsiveness of the output voltage of the high-voltage power supply will not meet the system requirements. Summary of the Invention

[0005] The present invention provides a control system, method and application of a 10-megawatt multi-module high-voltage power supply to solve the above problems.

[0006] The present invention is achieved through the following technical solutions: A control system for a 10-megawatt multi-module high-voltage power supply, comprising: a signal matching unit on the energy storage motor side, configured to collect a first output voltage signal of the energy storage motor and perform a DC step-down process on the first output voltage signal to obtain a first DC voltage signal; a signal acquisition and processing unit 1, configured to acquire and perform voltage-to-frequency conversion on the first DC voltage signal to obtain a first frequency signal; A high-voltage output-side signal matching unit, configured to collect the total output voltage of all power modules in the high-voltage power supply and perform voltage division processing on the total output voltage to obtain a first high-voltage voltage signal; A second signal acquisition and processing unit, configured to acquire and perform voltage-to-frequency conversion on the first high-voltage voltage signal to obtain a second frequency signal; an interface circuit unit, configured to receive optical signals corresponding to the first frequency signal and the second frequency signal, convert the optical signals into electrical signals of a first DC voltage signal and a total output voltage signal of the high-voltage power supply, respectively, and receive the electrical signals from the core controller unit; and, at the same time, the interface circuit unit is further configured to convert the electrical signal output by the core controller unit into an optical signal and transmit the optical signal to the power module; The core controller unit is used to obtain the corresponding number and voltage value of power modules based on the first DC voltage signal, the total output voltage signal of the high-voltage power supply and the heating power of the load system, and output an electrical signal based on the calculated number of power modules to control the start-up of the corresponding power modules.

[0007] As an optimization, the energy storage motor side signal matching unit includes a step-down transformer, a rectifier filter module and a sampling circuit connected in series in sequence. The primary winding of the step-down transformer is connected to the energy storage motor, and the sampling circuit is connected to the signal acquisition and processing unit.

[0008] As an optimization, the signal acquisition and processing unit includes a first voltage-frequency conversion module and a first electro-optical conversion circuit. The first voltage-frequency conversion module is connected to the sampling circuit and is used to perform voltage-frequency conversion on the first DC voltage signal to obtain a first frequency signal. The first electro-optical conversion circuit is used to convert the first frequency signal into a first optical signal and transmit the first optical signal to the interface circuit unit.

[0009] As an optimization, the high-voltage output side signal matching unit includes a high-voltage voltage divider and a high-voltage voltage acquisition module. The input end of the high-voltage voltage divider is connected to the output end of the high-voltage power supply, and is used to collect the total output voltage of the high-voltage power supply and perform voltage division. The high-voltage voltage acquisition module is connected to the output end of the high-voltage voltage divider, and is used to collect the output voltage of the high-voltage voltage divider to obtain a first high-voltage voltage signal.

[0010] As an optimization, the signal acquisition and processing unit 2 includes a second voltage-frequency conversion module and a second electro-optical conversion circuit. The second voltage-frequency conversion module is connected to the high-voltage voltage acquisition module and is used to perform voltage-frequency conversion on the first high-voltage voltage signal to obtain a second frequency signal. The second electro-optical conversion circuit is used to convert the second frequency signal into a second optical signal and transmit the second optical signal to the interface circuit unit.

[0011] As an optimization, the core controller unit includes a load heating power acquisition module, a high-voltage power supply setting voltage calculation module, a difference calculation module, an input quantity calculation module, a pulse distribution module, a conversion module and a frequency-voltage calculation module, wherein, The load heating power acquisition module is used to acquire the load heating power; The high-voltage power supply set voltage calculation module is used to calculate the set voltage according to the load heating power; The difference calculation module is used to calculate the voltage difference according to the set voltage and the total output voltage of the high-voltage power supply; The frequency-voltage calculation module is used to obtain the corresponding first DC voltage signal and the total output voltage signal of the high-voltage power supply according to the first frequency signal and the second frequency signal; The conversion module is used to convert the output voltage of each power module according to the first DC voltage signal, wherein the voltage value of the power module changes in the same proportion as the voltage value of the energy storage motor; The input quantity calculation module is used to calculate the quantity change of each power supply module according to the voltage difference; The pulse distribution module is used to perform corresponding pulse distribution according to the number of each type of power modules calculated by the input quantity calculation module, so as to control the input of the corresponding power modules.

[0012] The present invention also discloses a control method for a 10-megawatt multi-module high-voltage power supply, which is implemented by controlling the aforementioned 10-megawatt multi-module high-voltage power supply, including: During the experiment, a first output voltage of the energy storage motor is obtained, and voltage values ​​of corresponding voltage modules are calculated based on the first output voltage; Calculating a set voltage of the high-voltage power supply according to the load heating power, obtaining an actual total output voltage of the high-voltage power supply, and calculating a voltage difference between the set voltage and the total output voltage; Calculating a change in the number of each type of voltage module based on the voltage difference and the voltage values ​​of each type of voltage module, so that a voltage difference between an actual total output voltage of the high-voltage power supply obtained after the change and the set voltage is less than a threshold value; Calculate the number of each type of voltage modules at the current moment based on the quantity change and the number of each type of voltage modules at the previous moment; The operation of the corresponding voltage module is controlled according to the number of each type of voltage module at the current moment.

[0013] As an optimization, the actual total output voltage of the high voltage power supply is expressed as: , where a is the number of power modules in gear A, UA is the output voltage of the power modules in gear A, b is the number of power modules in gear B, UB is the output voltage of the power modules in gear B, c is the number of power modules in gear C, and UC is the output voltage of the power modules in gear C.

[0014] As an optimization, when the first output voltage signal of the energy storage motor is a non-floating reference voltage, UA is 800V, UB is 400V, and UC is 200V.

[0015] The present invention also discloses an application, in which the control system of the aforementioned 10-megawatt multi-module high-voltage power supply is used to control the high-voltage power supply to provide high voltage in nuclear fusion physical heating.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention provides a control method for a 10-megawatt multi-module high-voltage power supply. Compared with conventional multi-module high-voltage power supply control methods, the present invention not only tests the total voltage output of the high-voltage power supply, but also tests the output voltage of the energy storage motor in real time, thereby more fully understanding the impact of other systems on the energy storage motor voltage.

[0017] The present invention provides a control method for a 10-megawatt multi-module high-voltage power supply, which can avoid using the module voltage as a fixed value as a feedback influencing factor of the power supply voltage, thereby avoiding the situation where the stability and responsiveness of the output voltage of the high-voltage power supply fail to meet system requirements.

[0018] The present invention provides a control method for a 10-megawatt multi-module high-voltage power supply, which can dynamically track the voltage value of the power supply module and more accurately calculate the number and number of power supply modules that should be put into use during control calculation.

[0019] The present invention provides a control method for a 10-megawatt multi-module high-voltage power supply, capable of acquiring the output voltage of an energy storage motor, acquiring the total voltage of the high-voltage power supply, and performing feedback calculations for a control system. Tasks are assigned to different hardware modules of an FPGA in a pipelined manner, without interfering with each other, enabling efficient parallel data processing.

[0020] The present invention provides a control method for a 10-megawatt multi-module high-voltage power supply. Both the voltage of the energy storage motor and the voltage measurement of the high-voltage divider are converted through a V / F (voltage-to-frequency conversion module) and then transmitted using optical fiber, which can effectively isolate the main circuit equipment from the control system.

[0021] The present invention provides a control method for a 10-megawatt multi-module high-voltage power supply. In the control system, a fully digital control method is adopted, and optical fiber is used to transmit signals, which avoids the attenuation of measurement signals in the transmission line and improves the anti-interference performance of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 This is a block diagram of a control system for a 10-megawatt multi-module high-voltage power supply according to the present invention; Figure 2 This is a schematic diagram of specific module connections for a control system of a 10-megawatt multi-module high-voltage power supply according to the present invention.

[0023] Markings and corresponding parts names in the accompanying drawings: 1-Energy storage motor; 2-Step-down transformer; 3-Rectifier and filter module; 4-Energy storage motor voltage sampling circuit; 5-Voltage-to-frequency conversion module inside the signal acquisition and processing unit 1, i.e., the first voltage-to-frequency conversion module; 6-Frequency-to-voltage calculation module inside the core controller unit; 7-Conversion module; 8-Load heating power acquisition module; 9-High-voltage power supply setting voltage calculation module; 10-Difference calculation module; 11-Input module calculation module in the core controller unit; 12-Pulse distribution module in the core controller; 13-High-voltage voltage divider; 14-Load system; 15-High-voltage power supply; 16-Voltage-to-frequency conversion module inside the signal acquisition and processing unit 2, i.e., the second voltage-to-frequency conversion module; 17-High-voltage voltage acquisition module; 18-Power supply module; 19-Signal matching unit on the energy storage motor side; 20-Signal acquisition and processing unit 1; 21-Signal matching unit on the high-voltage output side; 22-Signal acquisition and processing unit 2; 23-Interface circuit unit; 24-Core controller unit. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0025] This embodiment 1 provides a control system for a 10-megawatt multi-module high-voltage power supply, such as Figure 1-Figure 2 Shown, including: The energy storage motor side signal matching unit 19 is used to collect the first output voltage signal of the energy storage motor 1 and perform DC voltage reduction processing on the first output voltage signal to obtain a first DC voltage signal; a signal acquisition and processing unit 1 20, configured to acquire and perform voltage-to-frequency conversion on the first DC voltage signal to obtain a first frequency signal; The high-voltage output side signal matching unit 21 is used to collect the total output voltage of all power modules 18 in the high-voltage power supply 15 and perform voltage division processing on the total output voltage to obtain a first high-voltage voltage signal; A second signal acquisition and processing unit 22 is configured to acquire and perform voltage-to-frequency conversion on the first high-voltage voltage signal to obtain a second frequency signal; The interface circuit unit 23 is configured to receive optical signals corresponding to the first frequency signal and the second frequency signal, and convert the optical signals into electrical signals of a first DC voltage signal and a total output voltage signal of the high-voltage power supply, respectively. The interface circuit unit 23 also receives electrical signals from the core controller unit 24, performs electrical-to-optical conversion on the electrical signals, and transmits the electrical signals to the power modules to control the switching on and off of the corresponding power modules. That is, the interface circuit unit converts the frequency signal into an electrical signal on the one hand; on the other hand, it also converts the electrical signal sent by the core controller for controlling the power module into an optical signal for controlling the power module. That is, the interface circuit unit and the power module are connected by optical fiber, while the core controller and the interface circuit unit are electrically connected.

[0026] The core controller unit 24 is used to obtain the number and voltage value of the corresponding power modules 18 according to the first DC voltage signal, the total output voltage signal of the high-voltage power supply and the heating power of the load system, and output an electrical signal according to the calculated number of the power modules to control the start-up of the corresponding power modules.

[0027] In this technical solution, the measurement and control signal matching unit includes an energy storage motor side signal matching unit and a high-voltage output side signal matching unit, which are mainly used for energy storage motor voltage sampling (collection and processing of generator motor voltage) and high-voltage output voltage sampling (using a high-voltage voltage divider to collect and process the total voltage and current of the high-voltage power supply). The signal acquisition and processing unit includes a signal acquisition and processing unit 1 and a signal acquisition and processing unit 2. The signal acquisition and processing unit 1 realizes the voltage-frequency conversion of the generator motor voltage, and the signal acquisition and processing unit 2 realizes the voltage-frequency conversion of the total voltage and current divided voltage of the high-voltage power supply; the core controller unit mainly realizes the control signal acquisition and processing, frequency-voltage signal conversion calculation and processing, control signal output, completion of control algorithm, etc.; the interface circuit unit completes the mutual conversion between electrical signals and optical signals, hardware circuit integrated processing of fault signals, display of various external signals, etc. The control method of the 10-megawatt multi-module high-voltage power supply of the present invention utilizes the above-mentioned hardware equipment to not only collect the overall output voltage of the high-voltage power supply for feedback, but also synchronously collects the output voltage of the energy storage motor, combines the software and hardware of the control system, and completes the real-time control of the high-voltage power supply. This control method can greatly improve the stability and responsiveness of the power supply output waveform.

[0028] The core controller unit 24 obtains the number of various power modules 18 and corresponding voltage values ​​according to the first DC voltage signal and the first high-voltage voltage signal of the energy storage motor 1 .

[0029] More specifically, the number of each type of power supply module can be obtained through the first DC voltage signal.

[0030] For example, when the first DC voltage signal is a reference voltage (assuming that the reference voltage of the energy storage motor is 3000V without fluctuation), the voltage values ​​of various voltage modules in the corresponding high-voltage power supply are also the reference voltage (assuming that the reference voltages of various voltage modules are 800V, 400V, and 200V, respectively). If the output voltage of the energy storage motor fluctuates, for example, the amplitude of the fluctuation is 0.9 times, that is, it fluctuates to 2700V, then the voltage values ​​of various voltage modules also fluctuate to 0.9 times the reference voltage.

[0031] Theoretically, the difference between the total output voltage of the high-voltage power supply and the set voltage of the high-voltage power supply (i.e., the voltage difference) must be less than the threshold value. Therefore, after knowing the voltage values ​​of various voltage modules, the number of various voltage modules can be calculated so that the total output voltage of the high-voltage power supply corresponding to the output voltage of the high-voltage power supply satisfies the condition that "the difference between the total output voltage of the high-voltage power supply and the set voltage of the high-voltage power supply (i.e., the voltage difference) must be less than the threshold value."

[0032] For example, suppose the output voltage of the high voltage power supply is , let the set voltage be expressed as ,but , is the difference threshold.

[0033] ,but , a, b, and c can be obtained through this formula.

[0034] In some embodiments, the energy storage motor side signal matching unit 19 includes a step-down transformer 2, a rectifier filter module 3 and a sampling circuit 4 connected in series in sequence, the primary winding of the step-down transformer 2 is connected to the energy storage motor 1, and the sampling circuit 4 is connected to the signal acquisition and processing unit 20.

[0035] In some embodiments, the signal acquisition and processing unit 20 includes a first voltage-frequency conversion module 5 and a first electro-optical conversion circuit. The first voltage-frequency conversion module 5 is connected to the sampling circuit 4 and is used to perform voltage-frequency conversion on the first DC voltage signal to obtain a first frequency signal. The first electro-optical conversion circuit is used to convert the first frequency signal into a first optical signal and transmit the first optical signal to the interface circuit unit 23.

[0036] In some embodiments, the high-voltage output side signal matching unit 21 includes a high-voltage voltage divider 13 and a high-voltage voltage acquisition module 17. The input end of the high-voltage voltage divider 13 is connected to the output end of the high-voltage power supply 15, and is used to collect the total output voltage of the high-voltage power supply 15 and perform voltage division. The high-voltage voltage acquisition module 17 is connected to the output end of the high-voltage voltage divider 13, and is used to collect the output voltage of the high-voltage voltage divider 13 to obtain a first high-voltage voltage signal.

[0037] In some embodiments, the signal acquisition and processing unit 22 includes a second voltage-frequency conversion module 16 and a second electro-optical conversion circuit. The second voltage-frequency conversion module 16 is connected to the high-voltage voltage acquisition module 17 and is used to perform voltage-frequency conversion on the first high-voltage voltage signal to obtain a second frequency signal. The second electro-optical conversion circuit is used to convert the second frequency signal into a second optical signal and transmit the second optical signal to the interface circuit unit 23.

[0038] In some embodiments, the core controller unit 24 includes a load heating power acquisition module 8, a high voltage power supply 15 setting voltage calculation module 9, a difference calculation module 10, an input module calculation module 11, a pulse distribution module 12, a conversion module 7 and a frequency-voltage calculation module, wherein: The load heating power acquisition module 8 is used to acquire the load heating power; The high voltage power supply 15 setting voltage calculation module 9 is used to calculate the setting voltage according to the load heating power; The difference calculation module 10 is used to calculate the voltage difference according to the set voltage and the total output voltage of the high voltage power supply 15; The frequency-voltage calculation module is used to obtain the corresponding first DC voltage signal and the total output voltage signal of the high-voltage power supply according to the first frequency signal and the second frequency signal; The conversion module 7 is used to convert the output voltage of each power module 18 according to the first DC voltage signal, wherein the voltage value of the power module 18 changes in the same proportion as the voltage value of the energy storage motor; The input module calculation module 11 is used to calculate the quantity change of each power module 18 according to the voltage difference; The pulse distribution module 12 is used to perform corresponding pulse distribution according to the number of each type of power modules 18 calculated by the input module calculation module 11, so as to control the input of the corresponding power modules 18.

[0039] Example 2 discloses a control method for a 10-megawatt multi-module high-voltage power supply, which is implemented by controlling the 10-megawatt multi-module high-voltage power supply described in Example 1, including: During the experiment, a first output voltage of the energy storage motor 1 is obtained, and voltage values ​​of corresponding voltage modules are calculated based on the first output voltage; Calculating the set voltage of the high-voltage power supply 15 according to the load heating power, obtaining the actual total output voltage of the high-voltage power supply 15, and calculating the voltage difference between the set voltage and the total output voltage; Calculating a change in the number of each type of voltage module based on the voltage difference and the voltage values ​​of each type of voltage module, so that the voltage difference between the actual total output voltage of the high-voltage power supply 15 obtained after the change and the set voltage is less than a threshold value; Calculate the number of each type of voltage modules at the current moment based on the quantity change and the number of each type of voltage modules at the previous moment; The operation of the corresponding voltage module is controlled according to the number of each type of voltage module at the current moment.

[0040] In some embodiments, the actual total output voltage of the high voltage power supply 15 is expressed as: , where a is the number of A-grade power modules 18, UA is the output voltage of A-grade power modules 18, b is the number of B-grade power modules 18, UB is the output voltage of B-grade power modules 18, c is the number of C-grade power modules 18, and UC is the output voltage of C-grade power modules 18.

[0041] In some embodiments, when the first output voltage of the energy storage motor 1 is a non-floating reference voltage, UA is 800V, UB is 400V, and UC is 200V.

[0042] Next, the specific method of the present invention is described in conjunction with the system.

[0043] First, the measurement and control signal matching unit on the energy storage side (i.e., the energy storage motor-side signal matching unit) is designed. This involves processing an AC3000V / 60V transformer (i.e., a step-down transformer) to feed the output voltage of the energy storage motor into the transformer. The three-phase output of the transformer's secondary side is then connected to a three-phase rectifier module (i.e., a rectifier and filter module) to rectify the three-phase AC voltage into DC voltage. On the output side of the rectifier module, a filter capacitor and sampling resistor are connected in parallel (i.e., the filter capacitor and sampling resistor form a sampling circuit).

[0044] Furthermore, the energy storage motor sample voltage (first DC voltage signal) obtained from the sampling resistor is fed into signal acquisition and processing unit 1. After voltage-to-frequency conversion, the corresponding sample voltage is converted into a frequency signal (first frequency signal). This electrical signal is then converted into an optical signal via an electro-optical conversion circuit. The optical signal is then transmitted via an optical fiber to the control system's interface circuit unit, where it undergoes photoelectric conversion and is reconverted back into an electrical signal. The reconverted electrical signal is then sent to the control system's core controller (ARM+FPGA) (i.e., the core controller unit) for calculation to determine the output voltage of each voltage module.

[0045] Furthermore, when the high-voltage power supply needs to be put into operation, the control system first calculates the voltage value required for the high-voltage power supply, i.e., the set voltage of the high-voltage power supply, based on the power requirements of the load system 14. Since high-voltage power supplies are generally designed with three power modules (800V, 400V, and 200V, respectively, referred to herein as A-level modules, B-level modules, and C-level modules, with the rest being A-level modules), the output voltage of each voltage module will fluctuate when the energy storage motor fluctuates. Based on the set high-voltage power supply voltage, the core controller unit calculates the number of A-level modules, B-level modules, and C-level modules that need to be put into operation.

[0046] The calculation process is as follows: obtain the first high-voltage voltage signal (the output voltage of the high-voltage power supply is obtained by voltage division), then calculate the voltage difference between the first high-voltage voltage signal and the set voltage, and calculate the number of each type of voltage module based on the premise that the voltage difference is less than the threshold and the output voltage of each type of voltage module is known.

[0047] The total voltage output of the high-voltage power supply is: Utotal = a*UA+b*UB+c*UC, where a is the number of A-range modules, UA is the output voltage of the A-range modules, b is the number of B-range modules, UB is the output voltage of the B-range modules, c is the number of C-range modules, and UC is the output voltage of the C-range modules; When the control system receives the timing signal (the trigger signal that triggers the core controller unit to send a pulse signal), the number of each type of power module is obtained according to the calculation in the previous step. The core controller unit sends multiple control pulse signals and sends them to the interface circuit unit to control the corresponding power modules.

[0048] The process of obtaining the first high voltage signal is as follows: The high-voltage voltage acquisition module 17 collects the voltage on the high-voltage power supply's high-voltage divider. The second voltage-frequency conversion module 16 converts the voltage of the divider into a frequency signal (a second frequency signal) after performing voltage-to-frequency conversion. This electrical signal is then converted into an optical signal via an electro-optical conversion circuit. This optical signal is then transmitted via an optical fiber to the control system's interface circuit unit, where it undergoes photoelectric conversion and is converted into an electrical signal. This electrical signal is then transmitted to the control system's core controller (ARM+FPGA) (core controller unit) for calculation, which determines the difference between the corresponding high-voltage power supply set voltage and the actual value of the high-voltage power supply.

[0049] Furthermore, based on the difference, the voltage values ​​of the power modules calculated above, UA, UB, and UC, are combined to calculate the number and number of power modules that should be put into use. Based on the calculation, the control system allocates control pulses to control the power modules. The above steps are repeated until the end of the experiment.

[0050] Example 3 discloses an application in which a control system of a 10-megawatt multi-module high-voltage power supply described in Example 1 is used to control a high-voltage power supply 15 to provide high voltage in nuclear fusion physical heating.

[0051] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control system for a 10-megawatt multi-module high-voltage power supply, characterized in that: include: a signal matching unit on the energy storage motor side, configured to collect a first output voltage signal of the energy storage motor and perform a DC step-down process on the first output voltage signal to obtain a first DC voltage signal; a signal acquisition and processing unit 1, configured to acquire and perform voltage-to-frequency conversion on the first DC voltage signal to obtain a first frequency signal; A high-voltage output-side signal matching unit, configured to collect the total output voltage of all power modules in the high-voltage power supply and perform voltage division processing on the total output voltage to obtain a first high-voltage voltage signal; A second signal acquisition and processing unit, configured to acquire and perform voltage-to-frequency conversion on the first high-voltage voltage signal to obtain a second frequency signal; an interface circuit unit, configured to receive optical signals corresponding to the first frequency signal and the second frequency signal, convert the optical signals into electrical signals of a first DC voltage signal and a total output voltage signal of the high-voltage power supply, respectively, and receive the electrical signals from the core controller unit; and, at the same time, the interface circuit unit is further configured to convert the electrical signal output by the core controller unit into an optical signal and transmit the optical signal to the power module; The core controller unit is used to obtain the corresponding number and voltage value of power modules based on the first DC voltage signal, the total output voltage signal of the high-voltage power supply and the heating power of the load system, and output an electrical signal based on the calculated number of power modules to control the start-up of the corresponding power modules.

2. A 10-megawatt multi-module high-voltage power supply control system according to claim 1, characterized in that: The energy storage motor side signal matching unit includes a step-down transformer, a rectifier filter module and a sampling circuit connected in series in sequence. The primary winding of the step-down transformer is connected to the energy storage motor, and the sampling circuit is connected to the signal acquisition and processing unit.

3. The control system of a 10-megawatt multi-module high-voltage power supply according to claim 1, characterized in that: The signal acquisition and processing unit 1 includes a first voltage-frequency conversion module and a first electro-optical conversion circuit. The first voltage-frequency conversion module is connected to the sampling circuit and is used to perform voltage-frequency conversion on the first DC voltage signal to obtain a first frequency signal. The first electro-optical conversion circuit is used to convert the first frequency signal into a first optical signal and transmit the first optical signal to the interface circuit unit.

4. The control system of a 10-megawatt multi-module high-voltage power supply according to claim 1, characterized in that: The high-voltage output side signal matching unit includes a high-voltage voltage divider and a high-voltage voltage acquisition module. The input end of the high-voltage voltage divider is connected to the output end of the high-voltage power supply, and is used to collect the total output voltage of the high-voltage power supply and perform voltage division. The high-voltage voltage acquisition module is connected to the output end of the high-voltage voltage divider, and is used to collect the output voltage of the high-voltage voltage divider to obtain a first high-voltage voltage signal.

5. The control system of a 10-megawatt multi-module high-voltage power supply according to claim 1, characterized in that: The signal acquisition and processing unit 2 includes a second voltage-frequency conversion module and a second electro-optical conversion circuit. The second voltage-frequency conversion module is connected to the high-voltage voltage acquisition module and is used to perform voltage-frequency conversion on the first high-voltage voltage signal to obtain a second frequency signal. The second electro-optical conversion circuit is used to convert the second frequency signal into a second optical signal and transmit the second optical signal to the interface circuit unit.

6. The control system of a 10-megawatt multi-module high-voltage power supply according to claim 1, characterized in that: The core controller unit includes a load heating power acquisition module, a high-voltage power supply setting voltage calculation module, a difference calculation module, an input quantity calculation module, a pulse distribution module, a conversion module and a frequency-voltage calculation module, wherein: The load heating power acquisition module is used to acquire the load heating power; The high-voltage power supply set voltage calculation module is used to calculate the set voltage according to the load heating power; The difference calculation module is used to calculate the voltage difference according to the set voltage and the total output voltage of the high-voltage power supply; The frequency-voltage calculation module is used to obtain the corresponding first DC voltage signal and the total output voltage signal of the high-voltage power supply according to the first frequency signal and the second frequency signal; The conversion module is used to convert the output voltage of each power module according to the first DC voltage signal, wherein the voltage value of the power module changes in the same proportion as the voltage value of the energy storage motor; The input quantity calculation module is used to calculate the quantity change of each power supply module according to the voltage difference; The pulse distribution module is used to perform corresponding pulse distribution according to the number of each type of power modules calculated by the input quantity calculation module, so as to control the input of the corresponding power modules.

7. A method for controlling a 10-megawatt multi-module high-voltage power supply, implemented by controlling a 10-megawatt multi-module high-voltage power supply according to any one of claims 1 to 6, characterized in that: include: During the experiment, a first output voltage of the energy storage motor is obtained, and voltage values ​​of corresponding voltage modules are calculated based on the first output voltage; Calculating a set voltage of the high-voltage power supply according to the load heating power, obtaining an actual total output voltage of the high-voltage power supply, and calculating a voltage difference between the set voltage and the total output voltage; Calculating a change in the number of each type of voltage module based on the voltage difference and the voltage values ​​of each type of voltage module, so that a voltage difference between an actual total output voltage of the high-voltage power supply obtained after the change and the set voltage is less than a threshold value; Calculate the number of each type of voltage modules at the current moment based on the quantity change and the number of each type of voltage modules at the previous moment; The operation of the corresponding voltage module is controlled according to the number of each type of voltage module at the current moment.

8. The control method of a 10-megawatt multi-module high-voltage power supply according to claim 7, characterized in that: The actual total output voltage of the high voltage power supply is expressed as: , where a is the number of power modules in gear A, UA is the output voltage of the power modules in gear A, b is the number of power modules in gear B, UB is the output voltage of the power modules in gear B, c is the number of power modules in gear C, and UC is the output voltage of the power modules in gear C.

9. The control method of a 10-megawatt multi-module high-voltage power supply according to claim 8, characterized in that: When the first output voltage signal of the energy storage motor is a non-floating reference voltage, UA is 800V, UB is 400V, and UC is 200V.

10. An application, characterized in that: In nuclear fusion physical heating, a control system of a 10-megawatt multi-module high-voltage power supply according to any one of claims 1 to 6 is used to control the high-voltage power supply to provide high voltage.

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