CN106410962B

CN106410962B - Mechanical DC breaker controller

Info

Publication number: CN106410962B
Application number: CN201610871577.9A
Authority: CN
Inventors: 袁召; 钟璨夷; 何俊佳; 魏晓光; 张宁; 赵岩; 单云海
Original assignee: Huazhong University of Science and Technology; Global Energy Interconnection Research Institute; State Grid Hubei Electric Power Co Ltd
Current assignee: Huazhong University of Science and Technology; Global Energy Interconnection Research Institute; State Grid Hubei Electric Power Co Ltd
Priority date: 2016-09-30
Filing date: 2016-09-30
Publication date: 2023-09-29
Anticipated expiration: 2036-09-30
Also published as: CN106410962A

Abstract

The invention discloses a controller of a mechanical direct current breaker, which comprises a power supply module, a communication module, a button module, a main control module and a driving module. The driving module consists of two subunits, namely a mechanical switch driving unit and a current-converting circuit driving unit; the mechanical switch driving unit is used for controlling a mechanical switch operating mechanism, namely a charge/discharge switch of an on/off energy storage capacitor in a repulsive force mechanism power cabinet, and comprises a driving circuit of a charge switch IGBT of a fast switching-off capacitor, a slow switching-off capacitor and a switching-on capacitor and a driving circuit of a discharge switch thyristor of the fast switching-off capacitor, the slow switching-off capacitor and the switching-on capacitor; and the current-converting circuit driving unit is used for controlling the trigger switch of the current-converting circuit. The mechanical direct current breaker controller provided by the invention has the advantages of simple structure, small volume and low cost; the running power consumption is low; the electromagnetic shielding effect is achieved, and the reliability is high; and various control modes of in-situ operation and remote communication can be realized.

Description

Mechanical DC breaker controller

Technical Field

The invention is mainly applied to the field of direct current circuit breakers, and particularly relates to a mechanical direct current circuit breaker controller.

Background

The development and utilization of fossil energy sources on a large scale causes a plurality of global problems such as resource shortage, environmental pollution, climate change and the like, and the development of renewable clean energy sources to replace fossil energy sources is a trend. The problems of new energy access and the like show the urgency of developing a direct-current power grid, and the high-voltage direct-current circuit breaker becomes a main technical bottleneck of developing the direct-current power grid, so that the demand is increasingly urgent.

In the main current topology of the three direct current breakers, the mechanical direct current breaker uses the artificial zero crossing technology to create an artificial zero crossing for a mature and reliable alternating current arc extinguishing chamber, thus creating a mature alternating current breaking environment, and the mechanical direct current breaker has simple structure and reliable principle; in addition, compared with the hybrid type and solid-state type direct current circuit breakers, the mechanical direct current circuit breaker has the advantages of small on-state loss, no need of an additional heat dissipation device, small volume, low cost and the like. However, reliable operation of mechanical dc circuit breakers relies on reliable control of their respective operating components by a controller, as well as precise coordination of the timing of the operation of the components. Therefore, the demand for the dc breaker controller is increasing, and at the same time, higher demands are being made on the response speed, reliability, operation and maintenance, external dimensions, cost, power consumption and the like.

At present, research and development of the direct current breaker are focused on a topology research and parameter optimization stage, and research on a high-voltage direct current breaker controller at home and abroad is relatively less, and the requirements of a power system cannot be met in all aspects.

Disclosure of Invention

Aiming at the problems existing in the prior art and the demands of the current electric power market, the invention aims to provide a mechanical direct current breaker controller which has the advantages of electromagnetic shielding effect, simplicity, reliability, small volume, low cost and small running power consumption, and can realize two control modes of on-site operation and remote communication.

The invention provides a mechanical direct current breaker controller, which comprises a communication module, a button module, a main control module and a driving module; the input end of the communication module is used for receiving the upper command signal, and the output end of the communication module is used for outputting feedback information; the input end of the button module is used for receiving the man-machine interaction signal, the input end of the main control module is connected to the output end of the button module, and the transmitting and receiving end of the main control module is connected to the transmitting and receiving end of the communication module; the input end of the driving module is connected to the output end of the main control module, and the driving module is provided with three output ends which are respectively used for being connected with an external charging switch, an external discharging switch and an external current converting loop.

Still further, the method further comprises: the power supply module is provided with four output ends which are respectively connected to the power end of the communication module, the power end of the button module, the power end of the main control module and the power end of the driving module.

Further, the power supply module is used for converting the input power IN+24V into different power supply voltages to supply power for other four modules. The communication module receives rated brake opening, fault brake opening, brake closing and other commands sent by the upper layer relay protection system and transmits the commands to the main control module, and feeds back action information to the upper layer relay protection system to realize remote communication control. The button module can realize the on-site control of the direct current breaker, sends pulse signals to the main control module through the button for controlling the opening and closing operation of the direct current breaker, and can modify the singlechip program to set the button to other functions according to the overhaul and test requirements, so that the controller is convenient to operate and maintain. After the main control module analyzes and processes the input data of the button module and the communication module, an action command is sent to the driving module, and the characteristics of high response speed and ultra-low power consumption are achieved. The mechanical switch driving module is used for controlling a mechanical switch operating mechanism, namely a charge/discharge switch of an on/off switch energy storage capacitor in a repulsive force mechanism power cabinet, and comprises a driving circuit of a charge switch IGBT of a fast on/off capacitor, a slow on/off capacitor and a closing capacitor and a driving circuit of a discharge switch thyristor of the fast on/off capacitor, the slow on/off capacitor and the closing capacitor; and the current-converting circuit driving module is used for controlling the trigger switch of the current-converting circuit.

Further, IN the power supply module, the EN and IN pins of the first converting unit U10 are connected to the vo1+ pin of the U11 and the positive terminal of the voltage stabilizing capacitor C5, the pin OUT is connected to the positive terminal of the voltage stabilizing capacitor C6 and outputs +3.3v voltage, and the pin GND is connected to the negative terminal of the voltage stabilizing capacitor C6 and grounded. The second conversion unit U11 is connected with pins Vin+ and +24V and the positive end of the filter capacitor C1, pins Vin-and ground are connected with the negative end of the filter capacitor C1, pins Vo1+ and the positive end of the voltage stabilizing capacitor C5 are connected with EN and IN pins of U10, and output +5V voltage, and the negative ends of pins GND and C5 are connected with the ground. The third conversion unit U12 is connected with the positive ends of the pins Vin+ and +24V and the filter capacitor C3, the pin Vin-is connected with the ground and the negative end of the filter capacitor C3, the pin Vo1+ is connected with the positive end of the voltage stabilizing capacitor C7 and outputs +15V voltage, and the negative ends of the pins GND and C7 are connected with the ground. The fourth conversion unit U13 is connected with the positive ends of the pins Vin+ and +24V and the filter capacitor C3, the pin Vin-is connected with the ground and the negative end of the filter capacitor C3, the pin Vo1+ is connected with the positive end of the voltage stabilizing capacitor C8 and outputs +15V voltage, and the negative ends of the pins GND and C8 are connected with the ground. The fifth conversion unit U14 is connected with the positive ends of the pins Vin+ and +24V and the filter capacitor C4, the pin Vin-is connected with the ground and the negative end of the filter capacitor C4, the pin Vo1+ is connected with the positive end of the voltage stabilizing capacitor C9 and outputs +24V voltage, and the negative ends of the pins GND and C9 are connected with the ground. The power supply module meets various working voltage requirements of circuit chips of each module and is used for supplying power to the circuits of each module;

Furthermore, in the communication module, the VCC pin of the power driving circuit U1 is connected to the +5v operating voltage and the positive electrode of the filter capacitor C3, the pins GND and the negative electrode of the filter capacitor C3 are grounded, the pin 1A receives the output signal TXD of the main control module 4, the pin 1B is connected to one end of the current limiting resistor R4, the other end of the pin R4 is connected to the +5v operating voltage, and the pin 1Y is connected to one end of the pins 2, 6, 7 of the optical fiber transmitter U2 and one end of the pull-up resistor R6, wherein the other end of the pin R6 is connected to the +5v operating voltage. The 3 pin of the optical fiber transmitter U2 is grounded. The pin 2 of the optical fiber receiver U4 is connected with +5V working voltage and is connected with the positive electrode of the filter capacitor C8, wherein the negative electrode of the filter capacitor C8 is grounded, the pins 3 and 7 are grounded, the pin 6 is connected with one end of the current limiting resistor R8, the other end of the pin 8 is connected with +3.3V working voltage, and the pin 6 outputs a signal RXD;

furthermore, IN the button module, one ends of the buttons S1, S2, S3 are respectively connected with the anodes of the capacitors C809, C810, C811, and are connected with one ends of the resistors R825, R826, R827, and simultaneously respectively lead out IN1, IN2, IN3 as input signals of the pins P1.0, P1.1, P1.2 of the main control module, wherein the other ends of the resistors R825, R826, R827 are connected with +3.3v, and the other ends of the buttons S1, S2, S3 are grounded with the cathodes of the capacitors C809, C810, C811;

furthermore, in the main control module, the U7 pins DVCC and AVCC of the main control chip are connected with +3.3V working voltage and are respectively connected with the positive ends of the filter capacitors C20 and C16, and the pins DVSS and CVSS and the negative electrodes of the filter capacitors C20 and C16 are grounded; pins XIN and XOUT of U7 are connected with two ends of crystal oscillator Y1 and one ends of oscillating capacitors C21 and C24 respectively, wherein the other ends of C21 and C24 are grounded; the pin P6.7 is connected with a resistor, wherein the other end of the R828 is connected with the positive end of the light-emitting diode, and the negative end of the D828 is grounded; pins TDO, TDI, TMS, TCK, NMI are connected with pins 1, 3, 5, 7 and 11 of the interface P1 of the downloading device in sequence, wherein a pin 4 of the interface P1 is connected with +3.3V, and a pin 9 is grounded; pins P1.0, P1.1, P1.2 are connected with output signals IN1, IN2, IN3 of the button module IN sequence; pins P1.5, P2.3, P2.4, P2.5, P2.6, P2.7, P4.3 output signals OUT1, OUT2, OUT3, OUT4, OUT5, OUT6, OUT7 in sequence; pins P3.6, P3.7 connect signals TXD, RXD of the communication module; pins P4.0 and P4.1 output ENA1 and ENA2 in sequence. The pin 1 of the reset chip U8 is connected with the pin RST of the U7 and the current limiting resistor R30, the pin 5 is connected with the other end of the R30 and the positive electrode of the C19, and is connected with a +3.3V working voltage in parallel, and the negative electrodes of the pin 2 and the C19 are commonly grounded;

Further, in the circuit charge switch IGBT driving circuit, a pin VCC of the double-AND gate high-speed driver U810 is connected with one end of a capacitor C812 and is connected with a +5V working voltage in parallel, wherein the other end of the capacitor C812 is grounded; the pins 1A and 2A are connected with the outputs OUT5 and OUT6 of the main control module 4; pins 1B, 2B are connected to one end of R811, wherein the other end of R811 is terminated with +5V operating voltage; foot 1Y is connected to one end of R812 and foot 1pos of U812, where the other end of R812 terminates +5V; pin 2Y is connected to one end of R813 and pin 2pos of U812, where the other end of R813 terminates at +5v; the pin GND is grounded. The pin VCC of the double-AND gate high-speed driver U811 is connected with one end of a capacitor C813 and is connected with a +5V working voltage in parallel, wherein the other end of the capacitor C813 is grounded; the pin 1A is connected with the output OUT7 of the main control module 4; foot 1B is connected to one end of R835, wherein the other end of R835 is connected to +5v operating voltage; foot 1Y is connected to one end of R836 and foot 1pos of U813, where the other end of R836 terminates at +5v; the pin GND is grounded. The pins 1neg and 2neg of the optical coupler isolator U812 are grounded; the voltage of the pin 1+ and the pin 2+ is connected with +5V; pin 1-is connected with one end of the resistors R814 and R816, wherein the other end of the resistor R814 is grounded, and the other end of the resistor R816 OUTPUTs OUTPUT7; pin 2-is connected to one end of resistors R815, R834, wherein the other end of R815 is grounded, and the other end of R834 OUTPUTs OUTPUT8. Optocoupler isolator U813 pin 1neg and 2neg are grounded; foot 1+ is connected with +5V voltage; pin 1-is connected to one end of resistors R838, R840, wherein the other end of R838 is grounded and the other end of R840 OUTPUTs OUTPUT9. The module is used for controlling the on-off of a charging switch IGBT of the fast switching-off capacitor, the slow switching-off capacitor and the switching-on capacitor;

Further, in the 3-way discharging switch thyristor driving circuit of the driving module, the pin VCC of the double-and-gate high-speed driver U804 is connected with one end of the capacitor C806 and is connected with a +5V working voltage in parallel, wherein the other end of the C806 is grounded; the pins 1A and 2A are connected with the outputs OUT2 and OUT3 of the main control module 4; pins 1B and 2B are connected with one end of R808, wherein the other end of R808 is connected with +5V working voltage; foot 1Y is connected to one end of R810 and foot 1pos of U808, where the other end of R810 terminates +5V; pin 2Y is connected to one end of R809 and pin 2pos of U808, where the other end of R809 is terminated at +5V; the pin GND is grounded. The pin VCC of the double-AND gate high-speed driver U805 is connected with one end of a capacitor C807 and is connected with a +5V working voltage in parallel, wherein the other end of the capacitor C807 is grounded; the pin 1A is connected with the output OUT4 of the main control module 4; the pin 1B is connected with one end of the R823, and the other end of the R823 is connected with +5V working voltage; foot 1Y is connected to one end of R824 and foot 1pos of U806, where the other end of R824 is terminated with +5V; the pin GND is grounded. The pins 1neg and 2neg of the optical coupler isolator U808 are grounded; the voltage of the pin 1+ and the pin 2+ is connected with +5V; the pin 1 is connected with one end of the resistors R817 and R819, wherein the other end of the resistor R817 is grounded, and the other end of the resistor R819 is connected with the pin 1 of the U809; pin 2-is connected to one end of resistors R818 and R820, wherein the other end of R818 is grounded, and the other end of R820 is connected to pin 2 of U809. The pins 1neg and 2neg of the optical coupler isolator U806 are grounded; foot 1+ is connected with +5V voltage; pin 1-is connected to one end of resistors R830, R832, wherein the other end of R830 is grounded, and the other end of R832 is connected to pin 3 of U809. The pins 14, 15 and 16 of the power amplifier U809 are sequentially connected with one ends of resistors R833, R822 and R821, wherein the resistors R833, R822 and R821 sequentially OUTPUT signals OUTPUT5, OUTPUT4 and OUTPUT3; pin 9 is connected with +24v voltage; the foot 8 is grounded. The circuit is used for controlling the on-off of a discharging switch thyristor of a fast switching-off capacitor, a slow switching-off capacitor and a switching-on capacitor;

Further, in the current-converting circuit driving circuit of the driving module, the pin VCC of the U15 is connected to one end of the capacitor Cx and is connected to the +5v operating voltage, wherein the other end of the capacitor Cx is grounded; the pin 1A is connected with the output OUT1 of the main control module 4; foot 1B is connected to one end of Rx, wherein the other end of Rx is connected to +5V; foot 1Y is connected with one end of Ry and feet 1, 6 and 7 of U16, wherein the other end of Ry is connected with +5V; the pin GND is grounded. The leg 3 of the U16 is grounded. The optical fiber transmitter U16 is connected with a matched trigger device of the control object current-converting loop trigger switch through an optical fiber and is used for controlling the current-converting loop trigger switch; by adopting optical fiber control, the remote reliable transmission of signals can be realized, the electrical isolation can be realized, and the interference of high-voltage channeling of a main loop to a controller is prevented;

when a rated fault opening (or rated opening) command is executed, an OUTPUT port P2.6 (or P2.7) of the main control module is changed to a low level, so that an OUTPUT signal OUTPUT7 (or OUTPUT 8) of the IGBT driving unit is changed to a low level, an energy storage capacitor charging switch IGBT for controlling a mechanical switch to rapidly open (or slowly open) is turned off, and simultaneously, an OUTPUT port P2.3 (or P2.4) of the main control module continuously OUTPUTs three pulses with a pulse width of 200us, so that an OUTPUT signal OUTPUT3 (OUTPUT 4) of the thyristor driving unit is 3 continuous 24V pulses, and an energy storage capacitor discharging switch thyristor of the mechanical switch to rapidly open (or slowly open) is controlled to be turned on, so that the mechanical switch opening action is controlled. When the mechanical switch moves to an effective opening distance, the output port P1.5 of the main control module outputs a high level, the trigger unit of the current conversion circuit converts the high level into an optical signal, and the current conversion circuit is controlled to trigger the switch to be conducted, so that the current of the current conversion circuit is superposed on the mechanical switch, and the opening action of the direct current circuit breaker is completed;

When a switching-on command is executed, an OUTPUT port P4.3 of the main control module becomes low level, so that an OUTPUT signal OUTPUT9 of the IGBT driving unit becomes low level, an energy storage capacitor charging switch IGBT for controlling the switching-on of the mechanical switch is switched off, and meanwhile, an OUTPUT port P2.5 of the main control module continuously OUTPUTs three pulses with the pulse width of 200us, so that an OUTPUT signal OUTPUT5 of the thyristor driving unit is 3 continuous 24V pulses, the energy storage capacitor discharging switch thyristor for controlling the switching-on of the mechanical switch is switched on, and further, the switching-on action of the direct current breaker is controlled, and a current conversion loop is not required to be triggered when the direct current breaker is switched on;

the invention adopts the DC-DC power supply conversion module with small volume and low price as the power supply module to convert the input power supply IN+24V into different power supply voltages of +3.3V, +5V, +15V, +24V and the like, thereby reducing the number of input power supply interfaces of the controller, saving the consumption of a switching power supply and the volume and the cost; the single chip microcomputer with the MSP430 model is adopted, the processing capacity is high, the response speed is high, the ultra-low power consumption is realized, the on-chip resources are rich, the development environment is convenient and efficient, the input data of the button module and the communication module can be reliably analyzed and processed, instructions are sent to the mechanical switch driving unit and the current-converting loop driving unit according to a certain time sequence according to an analysis result, and the reliable control of the opening (including fault opening and rated opening) or closing operation of the direct current breaker is realized through the accurate action time sequence coordination among all control objects; the button module and the communication module are arranged, so that the requirement of on-site control of the direct current breaker during on-site test, overhaul or operation maintenance is met, and the requirement of remote regulation and control through an upper relay protection system during real operation of the system is met; in addition, the controller is arranged in the customized metal shielding box, a large number of filtering and optical coupling circuits are arranged in each module circuit of the controller, the electromagnetic interference resistance effect is achieved, the control signals of the converter driving module are output through optical fibers, the signals can be reliably transmitted in a long distance, the electrical isolation can be realized, the interference of high-voltage channeling of the main loop to the controller is prevented, and the control reliability is improved.

Drawings

Fig. 1 is a schematic block diagram of a mechanical dc breaker controller according to an embodiment of the present invention;

fig. 2 (a) is a specific circuit diagram of a power supply module in a mechanical dc breaker controller according to an embodiment of the present invention;

fig. 2 (b) is a specific circuit diagram of a communication module in a mechanical dc breaker controller according to an embodiment of the present invention;

fig. 2 (c) is a specific circuit diagram of a button module in a mechanical dc breaker controller according to an embodiment of the present invention;

fig. 2 (d) is a specific circuit diagram of a master control module in a mechanical dc breaker controller according to an embodiment of the present invention;

fig. 3 (a) is a specific circuit diagram of a charging switch IGBT driving circuit in a mechanical dc breaker controller according to an embodiment of the present invention;

fig. 3 (b) is a specific circuit diagram of a discharging switch thyristor driving circuit in a mechanical dc breaker controller according to an embodiment of the present invention;

fig. 3 (c) is a specific circuit diagram of a current converting circuit driving unit in a mechanical dc breaker controller according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Fig. 1 shows a schematic block diagram of circuit connection provided by an embodiment of the present invention, and for convenience of explanation, only the portions relevant to the embodiment of the present invention are shown in detail as follows:

the mechanical DC breaker controller comprises: the device comprises a power supply module 1, a communication module 2, a button module 3, a main control module 4 and a driving module 5, wherein the driving module 5 consists of two subunits of a mechanical switch driving unit 51 and a current-converting circuit driving unit 52. The power supply module 1 can adopt a DC-DC power supply conversion module as a power supply module to convert an input power supply IN+24V into different power supply voltages of +3.3V, +5V, +15V, +24V and the like, and the power supply voltages are respectively used for supplying power to the communication module 2, the button module 3, the main control module 4 and the driving module 5. The communication module 2 receives rated opening, fault opening, closing and other commands sent by the upper layer relay protection system through an optical fiber receiver for converting optical signals into electric signals, transmits the commands to the main control module 4, and then feeds back action information to the upper layer relay protection system through an optical fiber transmitter for converting the electric signals into the optical signals, so that remote communication control is realized. The button module 3 can realize the on-site control of the direct current breaker, and by pressing the buttons S1, S2 and S3, pulse signals are sent to the main control module and are respectively used for controlling the direct current breaker to execute rated opening, fault opening and closing operations, and the single chip microcomputer program can be modified to set the buttons to other functions according to the overhaul and test requirements, so that the controller is convenient to operate and maintain. The main control module 4 can analyze and process the input data of the button module and the communication module by adopting a singlechip of MSP430 model, and respectively send action commands to the mechanical switch driving unit 51 and the current-converting circuit driving unit 52 according to the analysis result, and has the characteristics of high response speed and ultra-low power consumption. The mechanical switch driving module 5 is used for controlling a mechanical switch operating mechanism, namely a charge/discharge switch of an internal (on) gate energy storage capacitor in a repulsive force mechanism power cabinet, and comprises a driving circuit 511 of 3 charge switches IGBT (fast on capacitor charge switch, slow on capacitor charge switch, on capacitor charge switch) and a driving circuit 512 of 3 discharge switch thyristors (fast on capacitor discharge switch, slow on capacitor discharge switch, on capacitor discharge switch); a commutation loop drive module 52 for controlling the trigger switch of the commutation loop.

The invention adopts a DC-DC power supply conversion module with small volume and low price as a power supply module, and the input power supply IN+24V is isolated and converted into different power supply voltages of +3.3V, +5V, +15V, +24V and the like, thereby reducing the number of input power supply interfaces of a controller, saving the consumption of a switching power supply and the volume and the cost; the button module can realize the on-site control of the direct current breaker, and sends pulse signals to pins connected with the direct current breaker in the MSP430F1611PM (U7) of the main control chip by pressing the buttons S1, S2 and S3, and the pulse signals are respectively used for controlling the direct current breaker to execute rated opening, fault opening and closing operations, and can also set the buttons to other functions by modifying a singlechip program according to the overhaul and test requirements, so that the controller is convenient to operate and maintain; the communication module receives rated opening, fault opening, closing and other commands sent by the upper layer relay protection system through an optical fiber receiver HFBR-2412T which converts an optical signal into an electrical signal, and feeds back action information to the upper layer relay protection system through an optical fiber transmitter HFBR-1414 which converts the electrical signal into the optical signal, so that remote communication control is realized; the singlechip minimum control system adopts the singlechip of the MSP430 model to analyze and process the input data of the button module and the communication module, and respectively sends action commands to the mechanical switch driving module and the current-converting circuit driving module according to analysis results, and has the characteristics of high response speed and ultra-low power consumption.

Fig. 2 (a) shows a schematic circuit diagram of a power supply module 1 in a mechanical dc breaker controller according to an embodiment of the present invention, which is described in detail below:

the power supply module 1 includes: a first conversion unit U10, a second conversion unit U11, a third conversion unit U12, a fourth conversion unit U13, a fifth conversion unit U14, a filter capacitor C1, a filter capacitor C2, a filter capacitor C3, a filter capacitor C4, a voltage stabilizing capacitor C5, a voltage stabilizing capacitor C6, a voltage stabilizing capacitor C7, a voltage stabilizing capacitor C8, and a voltage stabilizing capacitor C9; the EN and IN pins of the first converting unit U10 are connected to the vo1+ pin of the U11 and the positive terminal of the voltage stabilizing capacitor C5, the pin OUT is connected to the positive terminal of the voltage stabilizing capacitor C6 and outputs +3.3v voltage, and the pin GND is connected to the negative terminal of the voltage stabilizing capacitor C6 and grounded. The second conversion unit U11 is connected with pins Vin+ and +24V and the positive end of the filter capacitor C1, pins Vin-and ground are connected with the negative end of the filter capacitor C1, pins Vo1+ and the positive end of the voltage stabilizing capacitor C5 are connected with EN and IN pins of U10, and output +5V voltage, and the negative ends of pins GND and C5 are connected with the ground. The third conversion unit U12 is connected with the positive ends of the pins Vin+ and +24V and the filter capacitor C3, the pin Vin-is connected with the ground and the negative end of the filter capacitor C3, the pin Vo1+ is connected with the positive end of the voltage stabilizing capacitor C7 and outputs +15V voltage, and the negative ends of the pins GND and C7 are connected with the ground. The fourth conversion unit U13 is connected with the positive ends of the pins Vin+ and +24V and the filter capacitor C3, the pin Vin-is connected with the ground and the negative end of the filter capacitor C3, the pin Vo1+ is connected with the positive end of the voltage stabilizing capacitor C8 and outputs +15V voltage, and the negative ends of the pins GND and C8 are connected with the ground. The fifth conversion unit U14 is connected with the positive ends of the pins Vin+ and +24V and the filter capacitor C4, the pin Vin-is connected with the ground and the negative end of the filter capacitor C4, the pin Vo1+ is connected with the positive end of the voltage stabilizing capacitor C9 and outputs +24V voltage, and the negative ends of the pins GND and C9 are connected with the ground.

The power supply module 1 achieves the working voltage requirements of circuit chips in the communication module 2, the button module 3, the main control module 4 and the driving module 5 through conversion of each unit to +24V voltage, and is used for supplying power to each module circuit. The first conversion unit U10 may use the chip TPS76033, the second conversion unit U11 may use the chip HZD10C-24S05, the third conversion unit U12 and the fourth conversion unit U13 may use the chip RM20-24S15, and the fifth conversion unit U14 may use the chip HZD10C-24S24.

In the embodiment of the present invention, as shown in fig. 2 (b), the communication module 2 includes: the power driving circuit U1, the optical fiber transmitter U2, the optical fiber receiver U4, the filter capacitors C10 and C11, the current limiting resistors R4 and R8 and the pull-up resistor R6.

The VCC pin of the power driving circuit U1 is connected with +5V working voltage and the positive electrode of the filter capacitor C3, the pin GND and the negative electrode of the filter capacitor C3 are grounded, the pin 1A receives an output signal TXD of the main control module 4, the pin 1B is connected with one end of the current limiting resistor R4, the other end of the R4 is connected with +5V working voltage, and the pin 1Y is connected with the pins 2, 6 and 7 of the optical fiber transmitter U2 and one end of the pull-up resistor R6, wherein the other end of the R6 is connected with the +5V working voltage. The 3 pin of the optical fiber transmitter U2 is grounded. The pin 2 of the optical fiber receiver U4 is connected with +5V working voltage and is connected with the positive electrode of the filter capacitor C8, wherein the negative electrode of the filter capacitor C8 is grounded, the pins 3 and 7 are grounded, the pin 6 is connected with one end of the current limiting resistor R8, the other end of the pin 8 is connected with +3.3V working voltage, and the pin 6 outputs a signal RXD. The module 2 receives rated opening, fault opening, closing and other commands sent by the upper layer relay protection system through an optical fiber receiver for converting the optical signals into electric signals, and feeds back action information to the upper layer relay protection system through an optical fiber transmitter for converting the electric signals into the optical signals, so that remote communication control is realized. The U1 can use a chip SN75451, the U2 can use a chip HFBR1414, and the U4 can use a chip HFBR-2412;

As shown in fig. 2 (c), the button module 3 includes: a first button S1, a second button S2, a third button S3, a resistor R825, a resistor R826, a resistor R827, a capacitor C809, a capacitor C810, and a capacitor C811; one end of the first button S1 is connected to the positive electrode of the capacitor C809 and the resistor R825, and outputs a signal IN1, wherein the other end of the resistor R825 is connected to the operating voltage +3.3v, and the other end of the first button S1 and the negative electrode of the capacitor C809 are grounded. One end of the second button S2 is connected with the positive electrode of the capacitor C810 and the resistor R826 and outputs a signal IN2, wherein the other end of the resistor R826 is connected with the working voltage +3.3V, and the other end of the second button S2 and the negative electrode of the capacitor C810 are grounded. One end of the third button S3 is connected with the positive electrode of the capacitor C811 and the resistor R827 and outputs a signal IN3, the other end of the resistor R827 is connected with the working voltage +3.3V, and the other end of the first button S1 and the negative electrode of the capacitor C811 are grounded. Pressing the first button S1, the second button S2 and the third button S3 sends pulse signals to the main control module 4, and the pulse signals are respectively used for controlling the direct current breaker to execute rated opening, fault opening and closing operations, and the requirements of maintenance and test can be met by modifying the singlechip program.

As shown in fig. 2 (d), the main control module 4 includes: the device comprises a master control chip single chip microcomputer U7, a reset chip U8, a downloading device interface P1, filter capacitors C16, C19 and C20, oscillation capacitors C21 and C24, a light emitting diode D828, a crystal oscillator Y1 and resistors R30 and R828. The U7 pins DVCC and AVCC of the master control chip are connected with +3.3V working voltage and are respectively connected with the positive ends of the filter capacitors C20 and C16, and the negative electrodes of the pins DVSS and CVSS and the C20 and C16 are grounded; pins XIN and XOUT of U7 are connected with two ends of crystal oscillator Y1 and one ends of oscillating capacitors C21 and C24 respectively, wherein the other ends of C21 and C24 are grounded; the pin P6.7 is connected with a resistor, wherein the other end of the R828 is connected with the positive end of the light-emitting diode, and the negative end of the D828 is grounded; pins TDO, TDI, TMS, TCK, NMI are connected with pins 1, 3, 5, 7 and 11 of the interface P1 of the downloading device in sequence, wherein a pin 4 of the interface P1 is connected with +3.3V, and a pin 9 is grounded; pins P1.0, P1.1, P1.2 are connected with output signals IN1, IN2, IN3 of the button module 3 IN sequence; pins P1.5, P2.3, P2.4, P2.5, P2.6, P2.7, P4.3 output signals OUT1, OUT2, OUT3, OUT4, OUT5, OUT6, OUT7 in sequence; pins P3.6, P3.7 communicate signals TXD, RXD of communication module 2; pins P4.0 and P4.1 output ENA1 and ENA2 in sequence. The pin 1 of the reset chip U8 is connected with the pin RST of the U7 and the current limiting resistor R30, the pin 5 is connected with the other end of the R30 and the positive electrode of the C19, and is connected with a +3.3V working voltage in parallel, and the pins 2 and the negative electrode of the C19 are commonly grounded. The main control module 4 analyzes and processes the input data of the button module and the communication module, and sends action commands to the mechanical switch driving unit 51 and the current-converting circuit driving unit 52 according to the analysis results. The singlechip U7, the reset chip U8 and the downloader interface P1 can sequentially use chips MSP430F1611PM and MAX823_ T, JTAG.

As shown in fig. 3 (a), the 3-way charge switch IGBT driving circuit 511 of the driving module 5 includes: double-AND gate high-speed drivers U810, U811, optocoupler isolators U812, U813, capacitors C812, C813, resistors R811, R812, R813, R814, R815, R816, R834, R835, R836, R838, R840. The pin VCC of the double-AND gate high-speed driver U810 is connected with one end of a capacitor C812 and is connected with a +5V working voltage in parallel, wherein the other end of the capacitor C812 is grounded; the pins 1A and 2A are connected with the outputs OUT5 and OUT6 of the main control module 4; pins 1B, 2B are connected to one end of R811, wherein the other end of R811 is terminated with +5V operating voltage; foot 1Y is connected to one end of R812 and foot 1pos of U812, where the other end of R812 terminates +5V; pin 2Y is connected to one end of R813 and pin 2pos of U812, where the other end of R813 terminates at +5v; the pin GND is grounded. The pin VCC of the double-AND gate high-speed driver U811 is connected with one end of a capacitor C813 and is connected with a +5V working voltage in parallel, wherein the other end of the capacitor C813 is grounded; the pin 1A is connected with the output OUT7 of the main control module 4; foot 1B is connected to one end of R835, wherein the other end of R835 is connected to +5v operating voltage; foot 1Y is connected to one end of R836 and foot 1pos of U813, where the other end of R836 terminates at +5v; the pin GND is grounded.

The pins 1neg and 2neg of the optical coupler isolator U812 are grounded; the voltage of the pin 1+ and the pin 2+ is connected with +5V; pin 1-is connected with one end of the resistors R814 and R816, wherein the other end of the resistor R814 is grounded, and the other end of the resistor R816 OUTPUTs OUTPUT7; pin 2-is connected to one end of resistors R815, R834, wherein the other end of R815 is grounded, and the other end of R834 OUTPUTs OUTPUT8. Optocoupler isolator U813 pin 1neg and 2neg are grounded; foot 1+ is connected with +5V voltage; pin 1-is connected to one end of resistors R838, R840, wherein the other end of R838 is grounded and the other end of R840 OUTPUTs OUTPUT9. The OUTPUT connectors are connected with the OUTPUT signals ENA1 and ENA2 OUTPUT by the OUTPUT circuits OUTPUT7, OUTPUT8 and OUTPUT9 of the circuit 511, the enable signals ENA1 and ENA2 OUTPUT by the OUTPUT ports P4.0 and P4.1 of the single chip microcomputer, and 15V and +15V power supplied by the power supply module together, and are connected with core driving boards matched with charge switches IGBT of the fast switching-off capacitor, the slow switching-off capacitor and the switching-on capacitor through FC flat cables for controlling the on-off of the IGBTs. The U810 and U811 may use the chip SN75451, and the U812 and U813 may use the chip TLP521-2.

As shown in fig. 3 (b), the 3-way discharge switching thyristor driving circuit 512 of the driving module 5 includes double-and-gate high-speed drivers U804 and U805, optocouplers U806 and U808, a power amplifier U809, capacitors C806 and C807, resistors R808, R809, R810, R817, R818, R819, R820, R821, R822, R823, R824, R830, R832, and R833. The pin VCC of the double-AND gate high-speed driver U804 is connected with one end of a capacitor C806 and is connected with a +5V working voltage in parallel, wherein the other end of the capacitor C806 is grounded; the pins 1A and 2A are connected with the outputs OUT2 and OUT3 of the main control module 4; pins 1B and 2B are connected with one end of R808, wherein the other end of R808 is connected with +5V working voltage; foot 1Y is connected to one end of R810 and foot 1pos of U808, where the other end of R810 terminates +5V; pin 2Y is connected to one end of R809 and pin 2pos of U808, where the other end of R809 is terminated at +5V; the pin GND is grounded. The pin VCC of the double-AND gate high-speed driver U805 is connected with one end of a capacitor C807 and is connected with a +5V working voltage in parallel, wherein the other end of the capacitor C807 is grounded; the pin 1A is connected with the output OUT4 of the main control module 4; the pin 1B is connected with one end of the R823, and the other end of the R823 is connected with +5V working voltage; foot 1Y is connected to one end of R824 and foot 1pos of U806, where the other end of R824 is terminated with +5V; the pin GND is grounded. The pins 1neg and 2neg of the optical coupler isolator U808 are grounded; the voltage of the pin 1+ and the pin 2+ is connected with +5V; the pin 1 is connected with one end of the resistors R817 and R819, wherein the other end of the resistor R817 is grounded, and the other end of the resistor R819 is connected with the pin 1 of the U809; pin 2-is connected to one end of resistors R818 and R820, wherein the other end of R818 is grounded, and the other end of R820 is connected to pin 2 of U809. The pins 1neg and 2neg of the optical coupler isolator U806 are grounded; foot 1+ is connected with +5V voltage; pin 1-is connected to one end of resistors R830, R832, wherein the other end of R830 is grounded, and the other end of R832 is connected to pin 3 of U809. The pins 14, 15 and 16 of the power amplifier U809 are sequentially connected with one ends of resistors R833, R822 and R821, wherein the resistors R833, R822 and R821 sequentially OUTPUT signals OUTPUT5, OUTPUT4 and OUTPUT3; pin 9 is connected with +24v voltage; the foot 8 is grounded. The three paths of output signals respectively form driving pulses together with +24V, are led out through connectors, and are respectively connected to pulse trigger plates matched with discharging switch thyristors of a fast switching-off capacitor, a slow switching-off capacitor and a switching-on capacitor for controlling triggering of the thyristors. The U804, U805 may use a chip SN75451, the U808, U806 may use a chip TLP521-2, and the U809 may use a chip ULN2003.

The commutation circuit driving unit 52 of the driving module 5, as shown in fig. 3 (c), includes: a dual-and-gate high-speed driver U15, a fiber optic transmitter U16, a capacitance Cx, and resistors Rx, ry. The pin VCC of U15 is connected with one end of the capacitor Cx and is connected with a +5V working voltage, wherein the other end of Cx is grounded; the pin 1A is connected with the output OUT1 of the main control module 4; foot 1B is connected to one end of Rx, wherein the other end of Rx is connected to +5V; foot 1Y is connected with one end of Ry and feet 1, 6 and 7 of U16, wherein the other end of Ry is connected with +5V; the pin GND is grounded. The leg 3 of the U16 is grounded. The optical fiber transmitter U16 is connected with a matched trigger device of the control object current-converting loop trigger switch through an optical fiber and is used for controlling the current-converting loop trigger switch; by adopting optical fiber control, the remote reliable transmission of signals can be realized, the electrical isolation can be realized, and the interference of high-voltage channeling of a main loop to a controller is prevented. The U15 and U16 may use chips SN75451 and HFBR1414, respectively.

The optical fiber transmitter U16 is connected with a matched trigger device of the control object current-converting loop trigger switch through an optical fiber and is used for controlling the current-converting loop trigger switch; by adopting optical fiber control, the remote reliable transmission of signals can be realized, the electrical isolation can be realized, and the interference of high-voltage channeling of a main loop to a controller is prevented.

When the rated fault opening/rated opening command is executed, the OUTPUT port P2.6/P2.7 of the main control module 4 is changed into a low level, so that the OUTPUT signal OUTPUT7/OUTPUT8 of the IGBT driving unit is changed into a low level, the energy storage capacitor charging switch IGBT of the mechanical switch for quick opening/slow opening is controlled to be turned off, and simultaneously, the OUTPUT port P2.3/P2.4 of the main control module 4 continuously OUTPUTs three pulses with the pulse width of 200us, so that the OUTPUT signal OUTPUT3/OUTPUT4 of the thyristor driving unit is 3 continuous 24V pulses, and the energy storage capacitor discharging switch thyristor of the mechanical switch for quick opening/slow opening is controlled to be turned on, so that the opening action of the mechanical switch is controlled. When the mechanical switch moves to an effective opening distance, the output port P1.5 of the main control module 4 outputs a high level, the trigger unit of the current conversion loop converts the high level into an optical signal, and the current conversion loop trigger switch is controlled to be conducted, so that the current of the current conversion loop is superposed on the mechanical switch, and the opening action of the direct current breaker is completed.

When a closing command is executed, an OUTPUT port P4.3 of the main control module 4 becomes low level, so that an OUTPUT signal OUTPUT9 of the IGBT driving unit becomes low level, an energy storage capacitor charging switch IGBT for controlling the mechanical switch to close is turned off, meanwhile, an OUTPUT port P2.5 of the main control module 4 continuously OUTPUTs three pulses with the pulse width of 200us, the OUTPUT signal OUTPUT5 of the thyristor driving unit is enabled to be 3 continuous 24V pulses, an energy storage capacitor discharging switch thyristor for controlling the mechanical switch to close is controlled to conduct, and further control of closing action of a direct current breaker is achieved, and a current conversion loop is not required to be triggered when the direct current breaker is closed.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. A mechanical dc breaker controller, comprising: the device comprises a power supply module (1), a communication module (2), a button module (3), a main control module (4) and a driving module (5);

the power supply module (1) is provided with four output ends which are respectively connected to the power supply end of the communication module (2), the power supply end of the button module (3), the power supply end of the main control module (4) and the power supply end of the driving module (5);

the input end of the communication module (2) is used for receiving an upper-layer command signal, and the output end of the communication module (2) is used for outputting feedback information;

the input end of the button module (3) is used for receiving man-machine interaction signals,

the input end of the main control module (4) is connected to the output end of the button module (3), and the transmitting and receiving ends of the main control module (4) are connected to the transmitting and receiving ends of the communication module (2);

The input end of the driving module (5) is connected to the output end of the main control module (4), and the driving module (5) is provided with three output ends which are respectively used for connecting an external charging switch, an external discharging switch and an external current conversion loop;

wherein, the main control module (4) includes: the device comprises a master control chip single chip microcomputer U7, a reset chip U8, a downloading device interface P1, a filter capacitor C16, a filter capacitor C19, a filter capacitor C20, an oscillating capacitor C21, an oscillating capacitor C24, a light-emitting diode D828, a crystal oscillator Y1, a resistor R30 and a resistor R828;

the digital power supply positive input end DVcc and the analog power supply positive input end AVcc of the master chip single-chip microcomputer U7 are connected with +3.3V input voltage, the digital power supply negative input end DVss and the analog power supply negative input end AVss of the master chip single-chip microcomputer U7 are grounded, a first input end P1.0 of the master chip single-chip microcomputer U7 is connected with an output signal IN1 of the button module (3), a second input end P1.1 of the master chip single-chip microcomputer U7 is connected with an output signal IN2 of the button module (3), a third input end P1.2 of the master chip single-chip microcomputer U7 is connected with an output signal IN3 of the button module (3), a communication receiving end URXDD 1 of the master chip single-chip microcomputer U7 receives an output signal RXDD of the communication module (2), a first output end P1.5 of the master chip single-chip microcomputer U7 is used for outputting a signal OUT1, a second output end P2.3 of the master chip single-chip microcomputer U7 is used for outputting a signal OUT2, a third input end P1.1 of the master chip single-chip microcomputer U7 is connected with an output end P2 of the button module 3, a third input end P1.2 of the master chip single-chip microcomputer U7 is used for outputting a signal OUT2, a signal U7 is used for outputting a signal of the output end P4 of the signal U7, and a fourth end P7 is used for outputting a signal P7 of the signal U7P 7; the positive end of the filter capacitor C16 is connected with the analog power positive input end AVcc of the master control chip singlechip U7, and the negative end of the filter capacitor C16 is grounded; the positive end of the filter capacitor C20 is connected with the digital power supply positive input end DVcc of the master control chip singlechip U7, and the negative end of the filter capacitor C20 is grounded; the input end of the crystal oscillator Y1 is connected with the crystal oscillator input end XIN of the master control chip singlechip U7, and the output end of the crystal oscillator Y1 is connected with the crystal oscillator output end XOUT of the master control chip singlechip U7; the positive end of the oscillating capacitor C21 is connected with the input end of the crystal oscillator Y1, and the negative end of the oscillating capacitor C21 is grounded; the positive end of the oscillating capacitor C24 is connected with the output end of the crystal oscillator Y1, and the negative end of the oscillating capacitor C24 is grounded; one end of the resistor R828 is connected with the input end P6.7 of the master control chip singlechip U7, and the other end of the resistor R828 is connected with the positive end of the light-emitting diode D828; the negative end of the light-emitting diode D828 is grounded;

The power input end VCC of the reset chip U8 is connected with +3.3V input voltage, the ground end GND of the reset chip U8 is grounded, and the reset end RST of the reset chip U8 is connected with the reset end RST of the master control chip singlechip U7; the positive end of the filter capacitor C19 is connected with the power input end VCC of the reset chip U8, and the negative end of the filter capacitor C19 is grounded; one end of the resistor R30 is connected with a reset end RST of the reset chip U8, and the other end of the resistor R30 is connected with +3.3V input voltage;

the power input end (4 th pin) of the downloader interface P1 is connected with +3.3v input voltage, the ground end (9 th pin) of the downloader interface P1 is grounded, the test data serial output end (1 st pin) of the downloader interface P1 is connected with the test data serial output end TDO of the reset chip U8, the test data serial input end (3 rd pin) of the downloader interface P1 is connected with the test data serial input end TDI of the reset chip U8, the test mode selection end (5 th pin) of the downloader interface P1 is connected with the test mode selection end TMS of the reset chip U8, the test clock end (7 th pin) of the downloader interface P1 is connected with the test clock end TCK of the reset chip U8, and the test system reset signal (RST 11 th pin) of the downloader interface P1 is connected with the reset end of the reset chip U8.

2. The mechanical direct current breaker controller according to claim 1, characterized in that the power supply module (1) comprises: a first conversion unit U10, a second conversion unit U11, a third conversion unit U12, a fourth conversion unit U13, a fifth conversion unit U14, a filter capacitor C1, a filter capacitor C2, a filter capacitor C3, a filter capacitor C4, a voltage stabilizing capacitor C5, a voltage stabilizing capacitor C6, a voltage stabilizing capacitor C7, a voltage stabilizing capacitor C8, and a voltage stabilizing capacitor C9;

the input positive end vin+ of the second conversion unit U11 is connected with +24v input voltage, the input negative end Vin-of the second conversion unit U11 is grounded, the ground end GND of the second conversion unit U11 is grounded, and the output end vo1+ of the second conversion unit U11 is used for outputting +5v voltage; the positive end of the filter capacitor C1 is connected to the input positive end Vin+ of the second conversion unit U11, and the negative end of the filter capacitor C1 is grounded; the positive end of the voltage stabilizing capacitor C5 is connected to the output end Vo1+ of the second conversion unit U11, and the negative end of the voltage stabilizing capacitor C5 is grounded;

the enable end EN and the input end IN of the first conversion unit U10 are both connected to the output end vo1+ of the second conversion unit U11, the ground end GND of the first conversion unit U10 is grounded, and the output end OUT of the first conversion unit U10 is used for outputting +3.3v voltage; the negative end of the voltage stabilizing capacitor C6 is grounded, and the positive end of the voltage stabilizing capacitor C6 is connected to the output end OUT of the first conversion unit U10;

The input positive end vin+ of the third conversion unit U12 is connected with +24v input voltage, the input negative end Vin-of the third conversion unit U12 is grounded, the ground end GND of the third conversion unit U12 is grounded, and the output end vo1+ of the third conversion unit U12 is used for outputting +15v voltage; the positive end of the filter capacitor C2 is connected to the input positive end Vin+ of the third conversion unit U12, and the negative end of the filter capacitor C2 is grounded; the positive end of the voltage stabilizing capacitor C7 is connected to the output end Vo1+ of the third conversion unit U12, and the negative end of the voltage stabilizing capacitor C7 is grounded;

the input positive end vin+ of the fourth conversion unit U13 is connected with +24v input voltage, the input negative end Vin-of the fourth conversion unit U13 is grounded, the ground end GND of the fourth conversion unit U13 is grounded, and the output end vo1+ of the fourth conversion unit U13 is used for outputting +15v voltage; the positive end of the filter capacitor C3 is connected with the input positive end Vin+ of the fourth conversion unit U13, and the negative end of the filter capacitor C3 is grounded; the positive end of the voltage stabilizing capacitor C8 is connected to the output end Vo1+ of the fourth conversion unit U13, and the negative end of the voltage stabilizing capacitor C8 is grounded;

the input positive end vin+ of the fifth conversion unit U14 is connected with +24v input voltage, the input negative end Vin-of the fifth conversion unit U14 is grounded, the ground end GND of the fifth conversion unit U14 is grounded, and the output end vo1+ of the fifth conversion unit U14 is used for outputting +24v voltage; the positive end of the filter capacitor C4 is connected with the input positive end Vin+ of the fifth conversion unit U14, and the negative end of the filter capacitor C4 is grounded; the positive end of the voltage stabilizing capacitor C9 is connected to the output end Vo1+ of the fifth conversion unit U14, and the negative end of the voltage stabilizing capacitor C9 is grounded.

3. The mechanical dc breaker controller according to claim 1, wherein the communication module (2) comprises: the power driving circuit U1, the optical fiber transmitter U2, the optical fiber receiver U4, the filter capacitor C10, the filter capacitor C11, the current limiting resistor R4, the current limiting resistor R8 and the pull-up resistor R6;

the power supply input end Vcc of the power driving circuit U1 is connected with +5V input voltage and is grounded through the filter capacitor C10, the ground end GND of the power driving circuit U1 is grounded, and the first input end 1A of the power driving circuit U1 is connected with the communication transmitting end UTXD1 of the main control module (4); one end of the current limiting resistor R4 is connected with the second input end 1B of the power driving circuit U1, and the other end of the current limiting resistor R4 is connected with +5V input voltage; one end of the pull-up resistor R6 is connected with the first output end 1Y of the power driving circuit U1, and the other end of the pull-up resistor R6 is connected with +5V input voltage;

the first positive terminal (the 2 nd pin), the second positive terminal (the 6 th pin) and the third positive terminal (the 7 th pin) of the optical fiber transmitter U2 are commonly connected with the first output terminal 1Y of the power driving circuit U1, and the ground terminal GND of the optical fiber transmitter U2 is grounded;

The power input end (the 2 nd pin) of the optical fiber receiver U4 is connected with +5V input voltage and is grounded through the filter capacitor C11; the ground end (3 rd pin) and the ground end (7 th pin) of the optical fiber receiver U4 are grounded, and the output end (6 th pin) of the optical fiber receiver U4 is used for being connected with the communication receiving end URXD1 of the main control module (4) and is also connected with +3.3V input voltage through the current limiting resistor R8.

4. A mechanical dc breaker controller according to any of claims 1-3, characterized in that the button module (3) comprises: a first button S1, a second button S2, a third button S3, a resistor R825, a resistor R826, a resistor R827, a capacitor C809, a capacitor C810, and a capacitor C811;

the positive end of the first button S1 is used for outputting a signal IN1, the positive end of the first button S1 is also connected to a +3.3v input voltage through the resistor R825, and the negative end of the first button S1 is grounded; the capacitor C809 is connected in parallel with the first button S1;

the positive end of the second button S2 is used for outputting a signal IN2, the positive end of the second button S2 is also connected to the +3.3v input voltage through the resistor R826, and the negative end of the second button S2 is grounded; the capacitor C810 is connected in parallel with the second button S2;

The positive end of the third button S3 is used for outputting a signal IN3, the positive end of the third button S3 is also connected to the +3.3v input voltage through the resistor R827, and the negative end of the third button S3 is grounded; the capacitor C811 is connected in parallel with the third button S3.

5. A mechanical dc breaker controller according to any of claims 1-3, characterized in that the drive module (5) comprises: a mechanical switch driving unit (51) and a commutation circuit driving unit (52), the mechanical switch driving unit (51) comprising a charge switch IGBT driving circuit (511) and a discharge switch thyristor driving circuit (512); the charging switch IGBT driving circuit (511) is used for driving the fast opening capacitor charging switch, the slow opening capacitor charging switch and the closing capacitor charging switch to be turned off; the discharging switch thyristor driving circuit (512) is used for driving the fast switching-off capacitor discharging switch, the slow switching-off capacitor discharging switch and the closing capacitor discharging switch to be turned off; the commutation circuit driving unit (52) is used for controlling the switching off of the commutation circuit trigger switch.

6. The mechanical dc breaker controller of claim 5 wherein the charge switch IGBT drive circuit (511) comprises: the first driver U810, the second driver U811, the first optocoupler isolator U812, the second optocoupler isolator U813, the filter capacitor C812, the filter capacitor C813, the resistor R811, the resistor R812, the resistor R813, the resistor R814, the resistor R815, the resistor R816, the resistor R834, the resistor R835, the resistor R836, the resistor R838 and the resistor R840;

The power input end Vcc of the first driver U810 is connected to +5v input voltage, the ground end GND of the first driver U810 is grounded, the first input end 1A of the first driver U810 receives the output signal OUT5 of the main control module (4), and the third input end 2A of the first driver U810 receives the output signal OUT6 of the main control module (4); the positive end of the filter capacitor C812 is connected with the power input end Vcc of the first driver U810, and the negative end of the filter capacitor C812 is grounded; one end of the resistor R811 is connected with the second input end 1B and the fourth input end 2B of the first driver U810, and the other end of the resistor R811 is connected with +5V input voltage; one end of the resistor R812 is connected with the first output end 1Y of the first driver U810, and the other end of the resistor R812 is connected with +5V input voltage; one end of the resistor R812 is connected with the second output end 2Y of the first driver U810, and the other end of the resistor R812 is connected with +5V input voltage;

the first collector 1+ of the first optocoupler isolator U812 is connected to +5v input voltage, the second collector 2+ of the first optocoupler isolator U812 is connected to +5v input voltage, the first positive terminal 1pos of the first optocoupler isolator U812 is connected to the first output terminal 1Y of the first driver U810, the second positive terminal 2pos of the first optocoupler isolator U812 is connected to the second output terminal 2Y of the first driver U810, the first negative terminal 1neg of the first optocoupler isolator U812 is grounded, and the second negative terminal 2neg of the first optocoupler isolator U812 is grounded; one end of the resistor R814 is connected with the first emitter 1-of the first optocoupler isolator U812, and the other end of the resistor R814 is grounded; the resistor R816 is connected with the first emitter 1-of the first optocoupler isolator U812, and the other end of the resistor R816 is used for outputting a signal OUTPUT7; one end of the resistor R815 is connected with the second emitter 2-of the first optocoupler isolator U812, and the other end of the resistor R815 is grounded; the resistor R834 is connected with the second emitter 2-of the first opto-isolator U812, and the other end of the resistor R834 is used for outputting a signal OUTPUT8;

The power input end Vcc of the second driver U811 is connected to +5v input voltage, the ground end GND of the first driver U811 is grounded, and the first input end 1A of the second driver U811 receives the output signal OUT7 of the main control module (4); the positive end of the filter capacitor C813 is connected to the power input end Vcc of the second driver U811, and the negative end of the filter capacitor C813 is grounded; one end of the resistor R835 is connected with the second input end 1B of the second driver U811, and the other end of the resistor R835 is connected with +5V input voltage; one end of the resistor R836 is connected to the first output end 1Y of the second driver U811, and the other end of the resistor R836 is connected to the +5v input voltage;

the first collector 1+ of the second optocoupler isolator U813 is connected to the +5v input voltage, the first positive terminal 1pos of the second optocoupler isolator U813 is connected to the first output terminal 1Y of the second driver U811, the first negative terminal 1neg of the second optocoupler isolator U813 is grounded, and the second negative terminal 2neg of the second optocoupler isolator U813 is grounded; one end of the resistor R838 is connected with the first emitter 1-of the second optocoupler isolator U813, and the other end of the resistor R838 is grounded; the resistor R840 is connected to the first emitter 1-of the second optocoupler isolator U813, and the other end of the resistor R840 is used for outputting the signal OUTPUT9.

7. The mechanical dc breaker controller of claim 5 wherein the discharge switching thyristor drive circuit (512) comprises: a third driver U804, a fourth driver U805, a third optocoupler isolator U806, a fourth optocoupler isolator U808, a power amplifier U809, a filter capacitor C806, a filter capacitor C807, a resistor R808, a resistor R809, a resistor R810, a resistor R817, a resistor R818, a resistor R819, a resistor R820, a resistor R821, a resistor R822, a resistor R823, a resistor R824, a resistor R830, a resistor R832, and a resistor R833;

the power input end Vcc of the third driver U804 is connected to +5v input voltage, the ground end GND of the third driver U804 is grounded, the first input end 1A of the third driver U804 receives the output signal OUT2 of the main control module (4), and the third input end 2A of the third driver U804 receives the output signal OUT3 of the main control module (4); the positive end of the filter capacitor C806 is connected with the power input end Vcc of the third driver U804, and the negative end of the filter capacitor C806 is grounded; one end of the resistor R808 is connected with the second input end 1B and the fourth input end 2B of the third driver U804, and the other end of the resistor R808 is connected with +5V input voltage; one end of the resistor R810 is connected to the first output end 1Y of the third driver U804, and the other end of the resistor R810 receives the +5v input voltage; one end of the resistor R809 is connected with the second output end 2Y of the third driver U804, and the other end of the resistor R809 is connected with +5V input voltage;

The first collector 1+ of the fourth optocoupler isolator U808 is connected to +5v input voltage, the second collector 2+ of the fourth optocoupler isolator U808 is connected to +5v input voltage, the first positive terminal 1pos of the fourth optocoupler isolator U808 is connected to the first output terminal 1Y of the third driver U804, the second positive terminal 2pos of the fourth optocoupler isolator U808 is connected to the second output terminal 2Y of the third driver U804, the first negative terminal 1neg of the fourth optocoupler isolator U808 is grounded, and the second negative terminal 2neg of the fourth optocoupler isolator U808 is grounded; one end of the resistor R817 is connected with the first emitter 1-of the fourth optocoupler isolator U808, and the other end of the resistor R817 is grounded; one end of the resistor R818 is connected with the second emitter 2-of the fourth optocoupler isolator U808, and the other end of the resistor R818 is grounded;

the power input end Vcc of the fourth driver U805 is connected to +5v input voltage, the ground end GND of the fourth driver U805 is grounded, and the first input end 1A of the fourth driver U805 receives the output signal OUT4 of the main control module (4); the positive end of the filter capacitor C807 is connected to the power input end Vcc of the fourth driver U805, and the negative end of the filter capacitor C807 is grounded; one end of the resistor R823 is connected with the second input end 1B of the fourth driver U805, and the other end of the resistor R823 is connected with +5V input voltage; one end of the resistor R824 is connected with the first output end 1Y of the fourth driver U805, and the other end of the resistor R824 is connected with +5V input voltage;

The first collector 1+ of the third optocoupler isolator U806 is connected to +5v input voltage, the first positive terminal 1pos of the third optocoupler isolator U806 is connected to the first output terminal 1Y of the fourth driver U805, the first negative terminal 1neg of the third optocoupler isolator U806 is grounded, and the second negative terminal 2neg of the third optocoupler isolator U806 is grounded; one end of the resistor R830 is connected with the first emitter 1-of the third optocoupler isolator U806, and the other end of the resistor R830 is grounded;

the power amplifier U809 nine-port (9 th pin) is connected with +24V working voltage, and the power amplifier ground end (8 th pin) is grounded; one end of the resistor R819 is connected with the first emitter 1-of the fourth optocoupler isolator U808, and the other end of the resistor R819 is connected with a first input port (a 1 st pin) of the power amplifier U809; one end of the resistor R820 is connected with the 2 nd emitter 2-of the fourth optocoupler isolator U808, and the other end of the resistor R820 is connected with the second input port (the 2 nd pin) of the power amplifier U809; one end of the resistor R832 is connected with the first emitter 1-of the third optocoupler isolator U806, and the other end of the resistor R832 is connected with a third input port (pin 3) of the power amplifier U809; one end of the resistor R821 is connected with the first OUTPUT port 16 of the power amplifier U809, and the other end of the resistor R821 is used for outputting a signal OUTPUT3; one end of the resistor R822 is connected with a second OUTPUT port (a 15 th pin) of the power amplifier U809, and the other end of the resistor R822 is used for outputting a signal OUTPUT4; one end of the resistor R833 is connected to the third OUTPUT port (pin 14) of the power amplifier U809, and the other end of the resistor R833 is used for outputting the signal OUTPUT5.

8. The mechanical dc breaker controller of claim 5 wherein the commutation loop drive unit (52) includes: a fifth driver U15, an optical fiber emitter U16, a filter capacitance Cx, a resistor Rx and a resistor Ry;

the power input end Vcc of the fifth driver U15 is connected to +5v input voltage, and is grounded through the filter capacitor Cx, the ground end GND of the fifth driver U15 is grounded, and the first input end 1A of the fifth driver U15 receives the output signal OUT1 of the main control module (4); one end of the resistor Rx is connected with the second input end 1B of the fifth driver U15, and the other end of the resistor Rx is connected with +5V input voltage; one end of the resistor Ry is connected with the first output end 1Y of the fifth driver U15, and the other end of the resistor Ry is connected with +5V input voltage;

the first positive terminal (pin 2), the second positive terminal (pin 6) and the third positive terminal (pin 7) of the optical fiber transmitter U16 are commonly connected to the first output terminal 1Y of the fifth driver U15, and the ground terminal GND of the optical fiber transmitter U16 is grounded.