A full-digital monitoring and control device for power switch cabinet

Abstract

A kind of digital monitoring and control device of electric switch cabinet.The present application is to solve the precedent that microcomputer line protection measurement and control device is not used as core to build switch cabinet full-cabinet digital monitoring and intelligent control system, and existing switch cabinet uses bus technology only to solve certain aspect information transmission etc.Provided is a technical scheme, including microcomputer line protection measurement and control device with two CAN-BUS interfaces, digital terminal main control circuit, digital circuit breaker control circuit, digital terminal auxiliary control circuit, interactive digital display screen, first CAN bus circuit, second CAN bus circuit and first and second power supply circuits, the first CAN bus circuit is connected between microcomputer line protection measurement and control device and digital terminal main control circuit and digital circuit breaker control circuit, the second CAN bus circuit is connected between microcomputer line protection measurement and control device and digital terminal auxiliary control circuit and interactive digital display screen by second bus, and there are several I / O interfaces on main control, auxiliary control or break control microcontroller to connect each execution circuit.

Description

TECHNICAL FIELD

[0001] The present application relates to intelligent monitoring and control system in power equipment switch cabinet, in particular to a full-digital monitoring and control device of power switch cabinet. BACKGROUND

[0002] Switch cabinet is a kind of power equipment for opening, closing, controlling and protecting in the process of power generation, power transmission, power distribution and power conversion in power system. With the increasing safety requirements and the degree of automation and intelligent monitoring of power supply system, the new generation of switch cabinet is installed with many digital monitoring devices and intelligent control devices. The information transmission of these digital monitoring devices and intelligent control devices has become a very complex system. How to reliably and stably operate this complex system has become a new topic in the industry.

[0003] At present, most of the automatic monitoring and control systems of power switch cabinet have too many lines laid in the cabinet, which has problems such as low communication efficiency, weak anti-interference ability, poor expansibility, etc., and it is difficult to meet the new requirements of modern power system for digitalization, intelligentization and high reliability. Bus technology has been adopted to simplify the lines in the cabinet and improve the communication efficiency and speed, but it is used to solve the information transmission problem of a certain aspect, and due to the limitations of the bus, it is impossible to realize the information transmission of the full-cabinet digital monitoring devices and intelligent control devices. Therefore, there is no ideal full-digital monitoring and control device of power switch cabinet available for the industry.

[0004] The management department of the industry advocates the use of microcomputer line protection measurement and control device to build the processing core of the automatic monitoring and control system in the power equipment switch cabinet, which also constitutes a new requirement of the industry. Microcomputer line protection measurement and control device is a ready-made product that has appeared in recent years. It has a built-in protection library composed of more than 20 standard protection programs, complete and powerful collection function of primary equipment voltage and current analog quantity and switching quantity, self-adaptive operation circuit, communication port adapted to standard RS485 and / or industrial CAN bus, and various functions through reasonable configuration to realize the protection and measurement and control function of interval, suitable for line protection of voltage level below 110kV. However, how to use microcomputer line protection measurement and control device as the processing core of switch cabinet to build the full-cabinet digital monitoring and intelligent control system of power switch cabinet has no prior art example. SUMMARY

[0005] In order to overcome the prior art has not yet the microcomputer line protection measurement and control device as the data processing core to construct the precedent of the full-cabinet digital monitoring and intelligent control system of the electric power switch cabinet, at present, the bus technology is used in the electric power switch cabinet to simplify the line in the cabinet, improve the communication efficiency and the communication speed, which is only limited to solve the defects of some aspects of information transmission problem, the purpose of the present application is to provide an improved full-digital monitoring and control device of the electric power switch cabinet, which can overcome the defects of the prior art.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a full-digital monitoring and control device of a power switch cabinet, characterized in that: comprising a microcomputer line protection measurement and control device with two or more CAN-BUS interfaces, a digital terminal main control circuit, a digital circuit breaker control circuit, a digital terminal auxiliary control circuit, an interactive digital display screen, a first CAN bus circuit, a second CAN bus circuit, a first power supply circuit and a second power supply circuit; wherein the first CAN bus circuit is composed of a first bus, a first CAN communication interface circuit on a first parallel end of one end of the first bus, and a second CAN communication interface circuit on a second parallel end of one end of the first bus; the second CAN bus circuit is composed of a second bus, a third CAN communication interface circuit on a first parallel end of one end of the second bus, and a second parallel end of one end of the second bus; the digital terminal main control circuit comprises a main control microcontroller, the digital circuit breaker control circuit comprises a breaker control microcontroller, and the digital terminal auxiliary control circuit comprises an auxiliary control microcontroller; the main control microcontroller, the breaker control microcontroller and the auxiliary control microcontroller all adopt microcontroller chips of STM32F series and alternative series; the other end of the first bus is connected with the first CAN-BUS interface of the microcomputer line protection measurement and control device, the first CAN communication interface circuit is connected with the CAN communication end of the main control microcontroller, and the second CAN communication interface circuit is connected with the CAN communication end of the breaker control microcontroller; the other end of the second bus is connected with the second CAN-BUS interface of the microcomputer line protection measurement and control device, the third CAN communication interface circuit is connected with the CAN communication end of the auxiliary control microcontroller, and the second parallel end of one end of the second bus is connected with the third CAN-BUS interface of the interactive digital display screen; the main control microcontroller has a plurality of I / O interfaces for connecting respective main control execution circuits on the power switch cabinet, the auxiliary control microcontroller has a plurality of I / O interfaces for connecting respective auxiliary control execution circuits on the power switch cabinet, and the breaker control microcontroller has a plurality of I / O interfaces for connecting respective circuit breaker execution circuits on the power switch cabinet; the output end of the first power supply circuit is connected with the power supply end of the digital terminal main control circuit, the digital terminal auxiliary control circuit, the first CAN communication interface circuit and the second CAN communication interface circuit respectively, and the output end of the second power supply circuit is connected with the power supply end of the digital circuit breaker control circuit and the first CAN communication interface circuit respectively; the power supply input ends of the microcomputer line protection measurement and control device, the interactive digital display screen, the first power supply circuit and the second power supply circuit are connected with a common AC power supply.

[0007] The microcomputer line protection measurement and control device, the digital terminal main control circuit and the digital terminal auxiliary control circuit can be arranged in an instrument room of the power switch cabinet, the interactive digital display screen can be arranged on a shell of the power switch cabinet and the screen faces outward, and the digital circuit breaker control circuit can be arranged in a circuit breaker room of the power switch cabinet.

[0008] The microcomputer line protection measurement and control device can be a product of NSR305 microcomputer line protection measurement and control device of Guodian Nan terminal or PDS761 microcomputer line protection measurement and control device of Guodian Nan terminal, the main control microcontroller can be a microcontroller chip of STM32F407LQFP100 or STM32F405LQFP100, the alternative model can be a microcontroller chip of NS32F407LQFP100 or NS32F405LQFP100, the break control microcontroller and the auxiliary control microcontroller can be a microcontroller chip of STM32F103LQFP64 or STM32F103RCT6, the alternative model can be a microcontroller chip of CKS32F103LQFP64 or CKS32F103RCT6, and the interactive digital display screen can be a smart touch all-in-one machine of F16G28-6W-BT or F16G20-C1-W-BT of Maichong Technology.

[0009] The main control execution circuit on the power switch cabinet can include a ground knife opening / closing driving control circuit, a chassis car driving control circuit, a ground knife operation hole locking driving control circuit, a main row travel switch state information acquisition circuit, a device operation management and state acquisition circuit associated with the digital terminal main control circuit and the like.

[0010] The auxiliary control execution circuit on the power switch cabinet can include a heater power switch control circuit, a lighting lamp power switch control circuit, a fan power switch control circuit, a visual device monitoring and management circuit, an auxiliary row travel switch and auxiliary switch state information acquisition circuit, a device operation management and state acquisition circuit associated with the digital terminal auxiliary control circuit and the like.

[0011] The circuit breaker execution circuit on the power switch cabinet can include a circuit breaker opening / closing / energy storage control circuit, a chassis car rocking out / rocking in control circuit, a circuit breaker closing locking driving control circuit, a chassis car rocking in locking driving control circuit, a circuit breaker travel switch and auxiliary switch state information acquisition circuit, a device operation management and state acquisition circuit associated with the digital circuit breaker control circuit and the like.

[0012] The first, second and third CAN communication interface circuits can adopt the same circuit structure, which can include resistor one to resistor four, capacitor one, CAN isolation transceiver module, common mode inductor, diode one to diode two, bidirectional transient suppression diode one, three-electrode gas discharge tube and fuse one to fuse two; one end of the resistor one connected to the RXD end of the CAN isolation transceiver module, the other end of the resistor one connected to the CANRX end of the corresponding microcontroller; one end of the resistor two connected to the TXD end of the CAN isolation transceiver module, the other end of the resistor two connected to the CANTX end of the corresponding microcontroller; the GND end of the CAN isolation transceiver module connected to the ground; the VCC end of the CAN isolation transceiver module connected to the power supply end; the input end one of the common mode inductor connected to the CANH end of the CAN isolation transceiver module, one end of the bidirectional transient suppression diode one connected to the corresponding output end one of the input end one of the common mode inductor, the other end of the bidirectional transient suppression diode one connected to one end of the fuse one, the other end of the fuse one connected to one end of the resistor four, the other end of the resistor four connected to the CANH end of the CAN-BUS interface of the microcomputer line protection monitoring device; the input end two of the common mode inductor connected to the CANL end of the CAN isolation transceiver module, the negative electrode of the diode one connected to the corresponding output end one of the input end two of the common mode inductor, the positive electrode of the diode two connected to the negative electrode of the diode one, the other end of the fuse two connected to the other end of the diode two, the other end of the fuse two connected to the other end of the resistor four, the other end of the resistor four connected to the CANL end of the CAN-BUS interface of the microcomputer line protection monitoring device; one end of the resistor three connected to the CANG end of the CAN isolation transceiver module, the other end of the resistor three connected to one end of the capacitor one, the other end of the capacitor one connected to the ground end of the three-electrode gas discharge tube, the other end of the resistor three and the other end of the capacitor one connected to the CANG end of the CAN-BUS interface of the microcomputer line protection monitoring device; the positive electrode of the diode one and the negative electrode of the diode two connected to the other end of the bidirectional transient suppression diode one.

[0013] The digital terminal main control circuit, the digital circuit breaker control circuit and the digital terminal auxiliary control circuit can be respectively composed of a corresponding main control, auxiliary control or break control microcontroller and its peripheral crystal oscillator circuit, asynchronous reset circuit, selection start mode circuit connected to the BOOT1 end, selection start mode circuit connected to the BOOT0 end and running program input circuit.

[0014] The circuit structure of the first power supply circuit in the technical solution can include an alternating current power input interface one, a fuse three to a fuse four, an AC-DC power module one, a capacitor two to a capacitor seven, a bidirectional transient suppression diode two, a voltage stabilizing integrated circuit, and a low-voltage difference linear integrated circuit. One end of the fuse three connected to the live wire of the alternating current power input interface one, the other end of the fuse three connected to the AC(N) end of the AC-DC power module one, the zero line of the alternating current power input interface one connected to the AC(L) end of the AC-DC power module one; the +Vo end of the AC-DC power module one connected to one end of the capacitor two, then connected to one end of the capacitor three, then connected to one end of the bidirectional transient suppression diode two, then connected to one end of the fuse four, the -Vo end of the AC-DC power module one connected to the other end of the capacitor two, then connected to the ground, then connected to the other end of the capacitor three, then connected to the other end of the bidirectional transient suppression diode two, the other end of the fuse four connected to one end of the voltage stabilizing integrated circuit and the other end of the capacitor four, the other end of the capacitor four connected to the ground; the GND end of the voltage stabilizing integrated circuit connected to the ground, the +Vo end of the voltage stabilizing integrated circuit connected to one end of the capacitor five, then connected to one end of the capacitor six, then connected to the VIN end of the low-voltage difference linear integrated circuit, the other ends of the capacitor five and the capacitor six connected to the ground; the GND end of the low-voltage difference linear integrated circuit connected to the ground, the VOUT end of the low-voltage difference linear integrated circuit connected to the output end of the first power supply circuit, the other end of the capacitor seven connected to the other VOUT end of the low-voltage difference linear integrated circuit, and the other end of the capacitor seven connected to the ground.

[0015] The circuit structure of the second power supply circuit in the technical solution can include an AC power input interface two, a fuse five to a fuse six, an AC-DC power module two, a capacitor eight to a capacitor eleven, a bidirectional transient suppression diode three to a bidirectional transient suppression diode four, a resistor five to a resistor eight, and an optocoupler; one end of the fuse five connected to the live wire of the AC power input interface two, the other end of the fuse five connected to the AC (N) end of the AC-DC power module two, the zero line of the AC power input interface two connected to the AC (L) end of the AC-DC power module two; the +Vo end of the AC-DC power module two connected to one end of the capacitor eight, then connected to one end of the capacitor nine, then connected to one end of the bidirectional transient suppression diode three, then connected to one end of the fuse six, the -Vo end of the AC-DC power module two connected to the other end of the capacitor eight, then connected to the ground, then connected to the other end of the capacitor nine, then connected to the other end of the bidirectional transient suppression diode three, the other end of the fuse six connected to one end of the resistor five; the other end of the resistor five connected to one end of the resistor six in one way, and connected to one end of the bidirectional transient suppression diode four in the other way, the other end of the resistor six connected to one end of the resistor seven, then connected to one end of the capacitor ten, then connected to the input positive electrode of the optocoupler, the other end of the bidirectional transient suppression diode four connected to the other end of the resistor seven, then connected to the other end of the capacitor ten, then connected to the ground, then connected to the input negative electrode of the optocoupler; one end of the resistor eight connected to the output collector of the optocoupler in one way, and one end of the capacitor eleven connected to the output collector of the optocoupler in the other way, the other end of the resistor eight as the output end of the second power supply circuit, and the output emitter of the optocoupler and the other end of the capacitor eleven both connected to the ground.

[0016] The output collector of the optocoupler of the second power supply circuit in the technical solution can be connected to one I / O end of the break control microcontroller in another way, and a power failure signal is fed back to the break control microcontroller when the second power supply circuit is powered off.

[0017] The beneficial effects of the present application are: first, the microcomputer line protection measurement and control device is used as the data processing core to construct the full-cabinet digital monitoring and intelligent control system of the power switch cabinet, a circuit system is used to integrate the protection, measurement, monitoring, control, man-machine interaction, communication and other functions of the full cabinet, thereby saving a large amount of cabinet installation space and control cables, and realizing a new generation of switch cabinet monitoring system with full-digital monitoring, intelligent control and high reliability protection. Second, the first CAN bus circuit and the second CAN bus circuit are used to transmit control and monitoring data respectively, specifically, the first CAN bus circuit is connected between the microcomputer line protection measurement and control device and the digital terminal main control circuit and the digital circuit breaker control circuit, and is used to transmit control data which must be quickly, accurately and effectively executed, so as to avoid transmission congestion caused by monitoring data with large information amount; the second CAN bus circuit is connected between the microcomputer line protection measurement and control device and the digital terminal auxiliary control circuit and the interactive digital display screen, and is used to transmit monitoring data, so as to avoid interference caused by control signal burst change, and ensure the authenticity and stability of state feedback. Third, since the digital terminal is divided into independent digital terminal main control circuit and digital terminal auxiliary control circuit, and the digital circuit breaker control circuit is also set as an independent circuit, the digital terminal main control circuit has a main control microcontroller, the digital terminal auxiliary control circuit has an auxiliary control microcontroller, and the digital circuit breaker control circuit has a breaker control microcontroller, so that the control data which focuses on high safety level requirements can be configured with more strict encryption and verification mechanism to ensure the safety of key operation instructions; the monitoring data which focuses on applicability requirements can be set by using adaptive transmission strategy to optimize the use of resources while ensuring a certain reliability; through the classification setting of the main control microcontroller, the auxiliary control microcontroller and the breaker control microcontroller, the data of different safety levels are protected and disposed, thereby improving the higher safety protection level, better applicability and stronger expansion ability of the whole system.

[0018] The present application is further described below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a block schematic diagram of an embodiment of the present application.

[0020] Figure 2 is Figure 1 a block schematic diagram of the digital terminal main control circuit, the digital terminal auxiliary control circuit or the digital circuit breaker control circuit of

[0021] Figure 3 is Figure 1 a circuit principle schematic diagram of

[0022] Figure 4 is Figure 3 Amplified schematic diagram of the first, second or third CAN communication interface circuit in

[0023] Figure 5 is Figure 3 Amplified schematic diagram of the digital terminal master control circuit in

[0024] Figure 6 is Figure 3 Amplified schematic diagram of the digital terminal auxiliary control circuit or digital circuit breaker control circuit in

[0025] Figure 7 is Figure 3 Amplified schematic diagram of the first power supply circuit in

[0026] Figure 8 is Figure 3 Amplified schematic diagram of the second power supply circuit in

[0027] In the figure: 1, microcomputer line protection measurement and control device; 2, digital terminal master control circuit; 3, digital circuit breaker control circuit; 4, digital terminal auxiliary control circuit; 5, interactive digital display screen; 6, first power supply circuit; 7, second power supply circuit; 8, first bus; 9, first CAN communication interface circuit; 10, second CAN communication interface circuit; 11, second bus; 12, third CAN communication interface circuit; 13, master microcontroller; 14, breaker microcontroller; 15, auxiliary microcontroller; 16, master, auxiliary or breaker microcontroller; 17, crystal oscillator circuit; 18, asynchronous reset circuit; 19, selection start mode circuit connected to BOOT1 end; 20, selection start mode circuit connected to BOOT0 end; 21, running program input circuit. DETAILED DESCRIPTION

[0028] Referring to Figure 1The full-digital monitoring and control device of the power switch cabinet is characterized in that it comprises a microcomputer line protection measurement and control device 1 with two or more CAN-BUS interfaces, a digital terminal main control circuit 2, a digital circuit breaker control circuit 3, a digital terminal auxiliary control circuit 4, an interactive digital display screen 5, a first CAN bus circuit, a second CAN bus circuit, a first power supply circuit 6 and a second power supply circuit 7; wherein the first CAN bus circuit is composed of a first bus 8, a first CAN communication interface circuit 9 on a first parallel end a at one end of the first bus 8 and a second CAN communication interface circuit 10 on a second parallel end b at one end of the first bus 8; the second CAN bus circuit is composed of a second bus 11, a third CAN communication interface circuit 12 on a first parallel end c at one end of the second bus 11 and a second parallel end d at one end of the second bus 11; the digital terminal main control circuit 2 comprises a main control microcontroller 13, the digital circuit breaker control circuit 3 comprises a breaker control microcontroller 14, and the digital terminal auxiliary control circuit 4 comprises an auxiliary control microcontroller 15; the main control microcontroller 13, the breaker control microcontroller 14 and the auxiliary control microcontroller 15 all adopt microcontroller chips of the STM32F series and alternative series; the other end e of the first bus 8 is connected with the first CAN-BUS interface of the microcomputer line protection measurement and control device 1, the first CAN communication interface circuit 9 is connected with the CAN communication end of the main control microcontroller 13, and the second CAN communication interface circuit 10 is connected with the CAN communication end of the breaker control microcontroller 14; the other end f of the second bus 11 is connected with the second CAN-BUS interface of the microcomputer line protection measurement and control device 1, the third CAN communication interface circuit 12 is connected with the CAN communication end of the auxiliary control microcontroller 15, and the second parallel end d at one end of the second bus 11 is connected with the third CAN-BUS interface of the interactive digital display screen 5; the main control microcontroller 13 is provided with a plurality of I / O interfaces for connecting respective main control execution circuits on the power switch cabinet, the auxiliary control microcontroller 15 is provided with a plurality of I / O interfaces for connecting respective auxiliary control execution circuits on the power switch cabinet, and the breaker control microcontroller 14 is provided with a plurality of I / O interfaces for connecting respective circuit breaker execution circuits on the power switch cabinet; the output end VCC1 of the first power supply circuit 6 is connected with the power supply end VCC of the digital terminal main control circuit 2, the digital terminal auxiliary control circuit 4, the first CAN communication interface circuit 9 and the third CAN communication interface circuit 12 respectively, and the output end VCC2 of the second power supply circuit 7 is connected with the power supply end VCC of the digital circuit breaker control circuit 3 and the second CAN communication interface circuit 10 respectively; the power supply input ends of the microcomputer line protection measurement and control device 1, the interactive digital display screen 5, the first power supply circuit 6 and the second power supply circuit 7 are connected with a common AC power supply.

[0029] In addition, the microcomputer line protection measurement and control device 1, the digital terminal main control circuit 2, the digital terminal auxiliary control circuit 4, the first CAN communication interface circuit 9 and the third CAN communication interface circuit 12 are arranged in the instrument room of the power switch cabinet, the interactive digital display screen 5 is arranged on the shell of the power switch cabinet and the screen faces outward, and the digital circuit breaker control circuit 3 and the second CAN communication interface circuit 10 are arranged in the circuit breaker room of the power switch cabinet.

[0030] The microcomputer line protection measurement and control device 1 adopts the NSR305 microcomputer line protection measurement and control device of Guodian Nanduan, the main control microcontroller 13 adopts the STM32F407LQFP100 microcontroller chip, the break control microcontroller 14 and the auxiliary control microcontroller 15 both adopt the STM32F103LQFP64 microcontroller chip, and the interactive digital display screen 5 adopts the F16G28-6W-BT intelligent touch all-in-one machine of Maichong Technology.

[0031] With reference to Figure 2 , the digital terminal main control circuit 2, the digital circuit breaker control circuit 3 and the digital terminal auxiliary control circuit 4 are respectively composed of the corresponding main control, auxiliary control or break control microcontroller 16 and the peripheral crystal oscillator circuit 17, asynchronous reset circuit 18, selection start mode circuit 19 connected to the BOOT1 end, selection start mode circuit 20 connected to the BOOT0 end and running program input circuit 21.

[0032] With reference to Figure 3 , Figure 1A circuit schematic diagram, characterized by comprising a microcomputer line protection measurement and control device 1 with two CAN-BUS interfaces, a digital terminal main control circuit 2, a digital circuit breaker control circuit 3, a digital terminal auxiliary control circuit 4, an interactive digital display screen 5, a first CAN bus circuit, a second CAN bus circuit, a first power supply circuit 6 and a second power supply circuit 7; wherein the first CAN bus circuit is composed of a first bus 8, a first CAN communication interface circuit 9 on the first parallel end of one end of the first bus 8 and a second CAN communication interface circuit 10 on the second parallel end of one end of the first bus 8; the second CAN bus circuit is composed of a second bus 11, a third CAN communication interface circuit 12 on the first parallel end of one end of the second bus 11 and the second parallel end of one end of the second bus 11; the digital terminal main control circuit 2 comprises a main control microcontroller 13, the digital circuit breaker control circuit 3 comprises a breaker control microcontroller 14, and the digital terminal auxiliary control circuit 4 comprises an auxiliary control microcontroller 15; the main control microcontroller 13, the breaker control microcontroller 14 and the auxiliary control microcontroller 15 all use STM32F series and alternative series microcontroller chips; the other end of the first bus 8 is connected to the first CAN-BUS interface of the microcomputer line protection measurement and control device 1, the first CAN communication interface circuit 9 is connected to the CAN communication end of the main control microcontroller 13, and the second CAN communication interface circuit 10 is connected to the CAN communication end of the breaker control microcontroller 14; the other end of the second bus 11 is connected to the second CAN-BUS interface of the microcomputer line protection measurement and control device 1, the third CAN communication interface circuit 12 is connected to the CAN communication end of the auxiliary control microcontroller 15, and the second parallel end of one end of the second bus 11 is connected to the third CAN-BUS interface of the interactive digital display screen 5; the main control microcontroller 13 has a plurality of I / O interfaces for connecting respective main control execution circuits on the power switch cabinet, the auxiliary control microcontroller 15 has a plurality of I / O interfaces for connecting respective auxiliary control execution circuits on the power switch cabinet, and the breaker control microcontroller 14 has a plurality of I / O interfaces for connecting respective circuit breaker execution circuits on the power switch cabinet; the output end VCC1 of the first power supply circuit 6 is connected to the power supply end VCC of the digital terminal main control circuit 2, the digital terminal auxiliary control circuit 4, the first CAN communication interface circuit 9 and the third CAN communication interface circuit 12, respectively, and the output end VCC2 of the second power supply circuit 7 is connected to the power supply end VCC of the digital circuit breaker control circuit 3 and the second CAN communication interface circuit 10, respectively; the power supply input ends of the microcomputer line protection measurement and control device 1, the interactive digital display screen 5, the first power supply circuit 6 and the second power supply circuit 7 are connected to a common AC power supply.

[0033] Referring to Figure 4, the first CAN communication interface circuit 9, the second CAN communication interface circuit 10 or the third CAN communication interface circuit 12 adopt the same circuit structure, and the circuit structure can be a circuit structure comprising a resistor R1 to a resistor R4, a capacitor C1, a CAN isolation transceiver module IC1 of a TD301M type, a common mode inductor CL, a diode D1 to a diode D2, a bidirectional transient voltage suppression diode TVS1 and a three-electrode gas discharge tube GDT, a fuse F1 to a fuse F2; wherein the RXD end of the CAN isolation transceiver module IC1 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the CANRX end of the corresponding microcontroller; the TXD end of the CAN isolation transceiver module IC1 is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the CANTX end of the corresponding microcontroller; the GND end of the CAN isolation transceiver module IC1 is connected to the ground; the VCC end of the CAN isolation transceiver module IC1 is a power supply end VCC; the CANH end of the CAN isolation transceiver module IC1 is connected to the input end one of the common mode inductor CL, one end of the bidirectional transient voltage suppression diode TVS1 and one end of the fuse F1 are connected to the corresponding output end one of the input end one of the common mode inductor CL in one way, and the other end of the fuse F1 is connected to one end of the three-electrode gas discharge tube GDT, and the other end of the three-electrode gas discharge tube GDT is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to the CANH end of the corresponding CAN-BUS interface of the microcomputer line protection and control device 1; the CANL end of the CAN isolation transceiver module IC1 is connected to the input end two of the common mode inductor CL, the negative electrode of the diode D1 and the positive electrode of the diode D2 are connected to the corresponding output end one of the input end two of the common mode inductor CL in one way, and one end of the fuse F2 is connected to the other end of the three-electrode gas discharge tube GDT, and the other end of the fuse F2 is connected to the other end of the resistor R4, and the other end of the resistor R4 is connected to the CANL end of the corresponding CAN-BUS interface of the microcomputer line protection and control device 1; one end of the resistor R3 and one end of the capacitor C1 are connected to the CANG end of the CAN isolation transceiver module IC1 in one way, and the other end of the resistor R3 and the other end of the capacitor C1 are connected to the ground end of the three-electrode gas discharge tube GDT in the other way, and the ground end of the three-electrode gas discharge tube GDT is connected to the CANG end of the corresponding CAN-BUS interface of the microcomputer line protection and control device 1; the positive electrode of the diode D1 and the negative electrode of the diode D2 are connected to the other end of the bidirectional transient voltage suppression diode TVS1.

[0034] Referring to Figure 7The circuit structure of the first power supply circuit comprises an AC power input interface J1, a fuse F3-F4, an AC-DC power module IC2 of LD40-23B24R2 type, capacitors C2-C7, a bidirectional transient suppression diode TVS2, a voltage stabilizing integrated circuit IC3 of M7805 type, and a low dropout linear integrated circuit IC4 of AMS1117-3.3 type. One end of the live wire 1 of the AC power input interface J1 is connected to one end of the fuse F3, the other end of the fuse F3 is connected to the AC (N) end of the AC-DC power module IC2, and the neutral wire 2 of the AC power input interface J1 is connected to the AC (L) end of the AC-DC power module IC2. The +Vo end of the AC-DC power module IC2 is connected to one end of the capacitor C2, which is further connected to one end of the capacitor C3, which is further connected to one end of the bidirectional transient suppression diode TVS2, which is further connected to one end of the fuse F4. The -Vo end of the AC-DC power module IC2 is connected to the other end of the capacitor C2, which is further connected to the ground, which is further connected to the other end of the capacitor C3, which is further connected to the other end of the bidirectional transient suppression diode TVS2. The other end of the fuse F4 is connected to the Vin end of the voltage stabilizing integrated circuit IC3 in one way, and connected to one end of the capacitor C4 in the other way. The other end of the capacitor C4 is connected to the ground. The GND end of the voltage stabilizing integrated circuit IC3 is connected to the ground. The +Vo end of the voltage stabilizing integrated circuit IC3 is connected to one end of the capacitor C5, which is further connected to one end of the capacitor C6, which is further connected to the VIN end of the low dropout linear integrated circuit IC4. The other ends of the capacitors C5 and C6 are both connected to the ground. The GND end of the low dropout linear integrated circuit IC4 is connected to the ground. The VOUT end of the low dropout linear integrated circuit IC4 is connected to the output end VCC1 of the first power supply circuit 6 in one way, connected to one end of the capacitor C7 in the other way, and connected to the other VOUT end of the low dropout linear integrated circuit IC4 in the other way. The other end of the capacitor C7 is connected to the ground.

[0035] Referring to Figure 8The circuit structure of the second power supply circuit 7 comprises an AC power input interface J2, fuses F5-F6, an AC-DC power module IC5 of LD40-23B24R2 type, capacitors C8-C11, bidirectional transient suppression diodes TVS3-TVS4, resistors R5-R8, and an optocoupler IC6 of PC817C type. One end of the firewire 1 of the AC power input interface J2 is connected to one end of the fuse F5, the other end of the fuse F5 is connected to the AC (N) end of the AC-DC power module IC5, and the zero wire 2 of the AC power input interface J2 is connected to the AC (L) end of the AC-DC power module IC5. The +Vo end of the AC-DC power module IC5 is connected to one end of the capacitor C8, which is further connected to one end of the capacitor C9, which is further connected to one end of the bidirectional transient suppression diode TVS3, which is further connected to one end of the fuse F6. The -Vo end of the AC-DC power module IC5 is connected to the other end of the capacitor C8, which is further connected to the ground, which is further connected to the other end of the capacitor C9, which is further connected to the other end of the bidirectional transient suppression diode TVS3. The other end of the fuse F6 is connected to one end of the resistor R5. The other end of the resistor R5 is connected to one end of the resistor R6 and the other end of the bidirectional transient suppression diode TVS4. The other end of the resistor R6 is connected to one end of the resistor R7 and one end of the capacitor C10, which is further connected to the input positive 1 end of the optocoupler IC6. The other end of the bidirectional transient suppression diode TVS4 is connected to the other end of the resistor R7 and the other end of the capacitor C10, which is further connected to the ground and the input negative 2 end of the optocoupler IC6. One end of the resistor R8 is connected to the output collector 4 end of the optocoupler IC6 and the other end of the capacitor C11, and the other end of the resistor R8 is the output end VCC2 of the second power supply circuit 7. The output emitter 3 end of the optocoupler IC6 and the other end of the capacitor C11 are both connected to the ground.

[0036] The output collector 4 end of the optocoupler IC6 of the second power supply circuit 7 is connected to one I / O end of the break control microcontroller 14 through another PC10, and when the second power supply circuit 7 is powered off, a power-off signal is fed back to the break control microcontroller 14.

[0037] Referring to Figure 6The circuit structure of the digital terminal auxiliary control circuit 4 or the digital circuit breaker control circuit 3 is the same, and each includes an STM32F103LQFP64 type microcontroller chip IC7 (an auxiliary control microcontroller or a breaker control microcontroller) and its peripheral crystal oscillator circuit composed of a crystal oscillator B1 and capacitors C12-C13, an asynchronous reset circuit composed of a resistor R9, a capacitor C14 and a switch K1, a selection start mode circuit connected to a BOOT1 terminal composed of a resistor R10, a selection start mode circuit connected to a BOOT0 terminal composed of a resistor R11 and a switch K2, and a running program input circuit composed of an input interface J3. One end of the crystal oscillator B1 is connected to the 5 terminal of the microcontroller chip IC7 in one way, and the other end is connected to one end of the capacitor C12 in another way. The other end of the crystal oscillator B1 is connected to the 6 terminal of the microcontroller chip IC7 in one way, and the other end is connected to one end of the capacitor C13 in another way. The other ends of the capacitors C12 and C13 are grounded. One end of the resistor R9 is connected to the 7 terminal of the microcontroller chip IC7 in one way, the other end is connected to one end of the capacitor C14, and the other end is connected to one end of the switch K1. The one end of the resistor R9 is a power supply terminal VCC, and the other ends of the capacitor C14 and the switch K1 are grounded. One end of the resistor R10 is connected to the 28 terminal of the microcontroller chip IC7, and the other end is grounded. One end of the resistor R11 is connected to the 60 terminal of the microcontroller chip IC7 in one way, and the other end is connected to one end of the switch K2. The other end of the switch K2 is a power supply terminal VCC, and the other end of the resistor R11 is grounded. The 3 terminal of the input interface J3 is connected to the 43 terminal of the microcontroller chip IC7, the 2 terminal of the input interface J3 is connected to the 42 terminal of the microcontroller chip IC7, and the 1 terminal of the input interface J3 is grounded. The 13 terminal, 19 terminal, 32 terminal, 48 terminal and 64 terminal of the microcontroller chip IC7 are power supply terminals VCC. The 12 terminal, 18 terminal, 31 terminal, 47 terminal and 63 terminal of the microcontroller chip IC7 are ground terminals. The 44 terminal and 45 terminal of the microcontroller chip IC7 are CANRX and CANTX terminals connected to the second CAN communication interface circuit or the three CAN communication interface circuit. The 2-4 terminals, 8-11 terminals, 14-17 terminals, 20-27 terminals, 29-30 terminals, 33-41 terminals, 50-59 terminals and 61-62 terminals of the microcontroller chip IC7 are 42 I / O terminals.

[0038] Referring to Figure 5The circuit structure of the digital terminal master control circuit 2 comprises an STM32F407LQFP100 type microcontroller chip IC8 (master microcontroller) and its peripherals, a crystal oscillator B2 and capacitors C16-C17, an asynchronous reset circuit comprising a resistor R12, a capacitor C18 and a switch K3, a selection start mode circuit for BOOT1 terminal comprising a resistor R13, a selection start mode circuit for BOOT0 terminal comprising a resistor R14 and a switch K4, and a running program input circuit comprising an input interface J4. One end of the crystal oscillator B2 is connected to the 12 terminal of the microcontroller chip IC8, and the other end is connected to one end of the capacitor C16. The other end of the crystal oscillator B2 is connected to the 13 terminal of the microcontroller chip IC8, and the other end is connected to one end of the capacitor C15. The other ends of the capacitors C16 and C15 are grounded. One end of the resistor R12 is connected to the 14 terminal of the microcontroller chip IC8, the other end is connected to one end of the capacitor C18, and the other end is connected to one end of the switch K3. The one end of the resistor R12 is a power supply terminal VCC. The other ends of the capacitor C18 and the switch K3 are grounded. One end of the resistor R13 is connected to the 37 terminal of the microcontroller chip IC8, and the other end is grounded. One end of the resistor R14 is connected to the 94 terminal of the microcontroller chip IC8, and the other end is connected to one end of the switch K4. The other end of the switch K4 is a power supply terminal VCC. The other end of the resistor R14 is grounded. The 3 terminal of the input interface J4 is connected to the 69 terminal of the microcontroller chip IC8. The 2 terminal of the input interface J4 is connected to the 68 terminal of the microcontroller chip IC8. The 1 terminal of the input interface J4 is grounded. The 11, 19, 28, 50, 75 and 100 terminals of the microcontroller chip IC8 are power supply terminals VCC. The 10, 20, 27, 74 and 99 terminals of the microcontroller chip IC8 are ground terminals. The 96 and 95 terminals of the microcontroller chip IC8 are CANRX and CANTX terminals for connecting the first CAN communication interface circuit. The 1-5, 7-9, 15-18, 23-26, 29-36, 38-48, 51-67, 70-71, 76-93 and 95-98 terminals of the microcontroller chip IC8 are 76 I / O terminals.

[0039] In use, the corresponding operation program is input from the input interface J4 of the digital terminal master control circuit 2 to the master microcontroller IC8, and the respective corresponding operation programs are input from the input interface J3 of the digital circuit breaker control circuit 3 and the digital terminal auxiliary control circuit 4 to the auxiliary microcontroller and the breaker microcontroller IC7; according to the operation program setting rules of the master microcontroller IC8, each master control execution circuit on the power switch cabinet is connected to the corresponding I / O end of the master microcontroller IC8; according to the operation program setting rules of the breaker microcontroller IC7, each circuit breaker execution circuit on the power switch cabinet is connected to the corresponding I / O end of the breaker microcontroller IC7; according to the operation program setting rules of the auxiliary microcontroller IC7, each auxiliary control execution circuit on the power switch cabinet is connected to the corresponding I / O end of the auxiliary microcontroller IC7; after the power input ends of the microcomputer line protection measurement and control device 1, the interactive digital display screen 5, the first power supply circuit 6 and the second power supply circuit 7 are connected to the public AC power supply, the full-digital monitoring and control device of the power switch cabinet starts to work; in the working process, the data transmission between each master control execution circuit and each circuit breaker execution circuit and the microcomputer line protection measurement and control device 1 is transmitted through the first CAN bus circuit, and the data transmission between each auxiliary control execution circuit and the interactive digital display screen 5 and the microcomputer line protection measurement and control device 1 is transmitted through the second CAN bus circuit. In this way, the state and data display of all working devices of the entire power switch cabinet appear on the screen of the interactive digital display screen 5, all human-computer operation work instructions are controlled through the button touch on the screen of the interactive digital display screen 5, so that the automatic control work instructions are directly issued by the microcomputer line protection measurement and control device 1 to the related execution circuit, thereby achieving the management of full-digital monitoring, intelligent control and high-reliability protection of the entire power switch cabinet.

Claims

1. A fully digital monitoring and control device for a power switch cabinet, characterized by: The invention comprises a microcomputer line protection and measurement and control device with two or more CAN-BUS interfaces, a digital terminal main control circuit, a digital circuit breaker control circuit, a digital terminal auxiliary control circuit, an interactive digital display screen, a first CAN bus circuit, a second CAN bus circuit, a first power supply circuit and a second power supply circuit; wherein the first CAN bus circuit is composed of a first bus, a first CAN communication interface circuit on a first parallel end of one end of the first bus, and a second CAN communication interface circuit on a second parallel end of one end of the first bus; the second CAN bus circuit is composed of a second bus, a third CAN communication interface circuit on a first parallel end of one end of the second bus, and a second parallel end of one end of the second bus; the digital terminal main control circuit includes a main control microcontroller, the digital circuit breaker control circuit includes a break control microcontroller, and the digital terminal auxiliary control circuit includes an auxiliary control microcontroller, and the main control microcontroller, the break control microcontroller and the auxiliary control microcontroller all adopt STM32F series and alternative series microcontroller chips; the other end of the first bus is connected to the first CAN-BUS interface of the microcomputer line protection and measurement and control device, and the first CAN communication interface circuit is connected to the CAN communication interface circuit of the main control microcontroller. The second CAN communication interface circuit is connected to the CAN communication terminal of the interruption control microcontroller; the other end of the second bus is connected to the second CAN-BUS interface of the microcomputer line protection and measurement and control device, the third CAN communication interface circuit is connected to the CAN communication terminal of the auxiliary control microcontroller, and the second parallel end of one end of the second bus is connected to the third CAN-BUS interface of the interactive digital display screen; the main control microcontroller has several I / O interfaces for respectively connecting to the main control execution circuits on the power switch cabinet, the auxiliary control microcontroller has several I / O interfaces for respectively connecting to the auxiliary control execution circuits on the power switch cabinet, and the interruption control microcontroller has several I / O interfaces for respectively connecting to the circuit breaker execution circuits on the power switch cabinet; the output end of the first power supply circuit is respectively connected to the power supply ends of the digital terminal main control circuit, the digital terminal auxiliary control circuit, the first CAN communication interface circuit and the second CAN communication interface circuit, and the output end of the second power supply circuit is respectively connected to the power supply ends of the digital circuit breaker control circuit and the first CAN communication interface circuit; the power input ends of the microcomputer line protection and measurement and control device, the interactive digital display screen, the first power supply circuit and the second power supply circuit are connected to a common AC power supply.

2. The fully digital monitoring and control device for a power switch cabinet according to claim 1 is characterized in that: The microcomputer line protection measurement and control device, the digital terminal main control circuit and the digital terminal auxiliary control circuit are arranged in the instrument room of the power switch cabinet, the interactive digital display screen is arranged on the casing of the power switch cabinet with its screen facing outside the casing, and the digital circuit breaker control circuit is arranged in the circuit breaker room of the power switch cabinet.

3. The fully digital monitoring and control device for a power switch cabinet according to claim 1 or 2, characterized in that: The first, second and third CAN communication interface circuits adopt the same circuit structure, and their circuit structures all include resistors 1 to 4, capacitor 1, a CAN isolation transceiver module, a common-mode inductor, diodes 1 to 2, a bidirectional transient suppression diode 1, a three-pole gas discharge tube and fuses 1 to 2; wherein the RXD terminal of the CAN isolation transceiver module is connected to one end of resistor 1, and the other end of resistor 1 is connected to the CANRX terminal of the corresponding microcontroller; the TXD terminal of the CAN isolation transceiver module is connected to one end of resistor 2, and the other end of resistor 2 is connected to the CANTX terminal of the corresponding microcontroller; The GND terminal of the CAN isolated transceiver module is grounded; the VCC terminal of the CAN isolated transceiver module is the power supply terminal; The CANH terminal of the CAN isolation transceiver module is connected to the input terminal 1 of the common mode inductor, and the corresponding output terminal of the input terminal 1 of the common mode inductor is connected to one end of the bidirectional transient suppression diode 1 and the other end of the fuse 1. The other end of the fuse 1 is connected to one end of the three-pole gas discharge tube and then to one end of the resistor 4, which is used as the CANH terminal of a CAN-BUS interface connected to the microcomputer line protection and measurement and control device; the CANL terminal of the CAN isolation transceiver module is connected to the input terminal 2 of the common mode inductor, and the corresponding output terminal of the input terminal 2 of the common mode inductor is connected to the negative electrode of the diode 1 and then to the positive electrode of the diode 2 and then to the fuse. One end of the first resistor is connected to one end of the second resistor, and the other end of the second fuse is connected to the other end of the three-pole gas discharge tube and then to the other end of the fourth resistor, and then serves as the CANL end of the CAN-BUS interface connected to the microcomputer line protection and measurement and control device; one end of the CANG end of the CAN isolation transceiver module is connected to one end of the third resistor, and the other end of the CANG end is connected to one end of the first capacitor, and the other end of the third resistor and the other end of the first capacitor are connected in parallel with the ground end of the three-pole gas discharge tube, and then serve as the CANG end of the CAN-BUS interface connected to the microcomputer line protection and measurement and control device; the positive electrode of the first diode and the negative electrode of the second diode are connected in parallel with the other end of the first bidirectional transient suppression diode.

4. The fully digital monitoring and control device for a power switch cabinet according to claim 1 or 2, characterized in that: The digital terminal main control circuit, digital circuit breaker control circuit and digital terminal auxiliary control circuit are respectively composed of corresponding main control, auxiliary control or circuit breaker control microcontrollers and their peripheral crystal oscillator circuits, asynchronous reset circuits, startup mode selection circuits connected to the BOOT1 terminal, startup mode selection circuits connected to the BOOT0 terminal and running program input circuits.

5. The fully digital monitoring and control device for a power switch cabinet according to claim 1 or 2, characterized in that: The circuit structure of the first power supply circuit includes an AC power input interface 1, fuses 3 to 4, an AC-DC power supply module 1, capacitors 2 to 7, a bidirectional transient suppression diode 2, a voltage stabilizing integrated circuit, and a low-voltage difference linear integrated circuit; wherein the live wire of the AC power input interface 1 is connected to one end of the fuse 3, the other end of the fuse 3 is connected to the AC (N) end of the AC-DC power supply module 1, and the neutral wire of the AC power input interface 1 is connected to the AC (L) end of the AC-DC power supply module 1; the +Vo terminal of the AC-DC power supply module 1 is connected to one end of the capacitor 2, then to one end of the capacitor 3, then to one end of the bidirectional transient suppression diode 2, then to one end of the fuse 4, and the -Vo terminal of the AC-DC power supply module 1 is connected to the other end of the capacitor 2. Then it is connected to ground, and then to the other end of capacitor three, and then to the other end of bidirectional transient suppression diode two. The other end of fuse four is connected to the Vin end of the voltage regulator integrated circuit in one path, and the other path is connected to one end of capacitor four, and the other end of capacitor four is grounded; the GND end of the voltage regulator integrated circuit is grounded, the +Vo end of the voltage regulator integrated circuit is connected to one end of capacitor five, and then to one end of capacitor six, and then to the VIN end of the low-voltage difference linear integrated circuit, and the other ends of capacitor five and capacitor six are both grounded; the GND end of the low-voltage difference linear integrated circuit is grounded, the VOUT end of the low-voltage difference linear integrated circuit is used as the output end of the first power supply circuit in one path, and the other path is connected to one end of capacitor seven, and the other path is connected to the other VOUT end of the low-voltage difference linear integrated circuit, and the other end of capacitor seven is grounded.

6. The fully digital monitoring and control device for a power switch cabinet according to claim 1 or 2, characterized in that: The circuit structure of the second power supply circuit includes an AC power input interface 2, fuses 5 to 6, an AC-DC power supply module 2, capacitors 8 to 11, bidirectional transient suppression diodes 3 to 4, resistors 5 to 8, and a photocoupler; wherein the live wire of the AC power input interface 2 is connected to one end of the fuse 5, the other end of the fuse 5 is connected to the AC (N) end of the AC-DC power supply module 2, and the neutral wire of the AC power input interface 2 is connected to the AC (L) end of the AC-DC power supply module 2; the +Vo terminal of the AC-DC power supply module 2 is connected to one end of the capacitor 8, which is then connected to one end of the capacitor 9, which is then connected to one end of the bidirectional transient suppression diode 3, which is then connected to one end of the fuse 6, and the -Vo terminal of the AC-DC power supply module 2 is connected to the capacitor 8. The other end of is connected to ground and then to the other end of capacitor nine and then to the other end of bidirectional transient suppression diode three. The other end of fuse six is ​​connected to one end of resistor five; the other end of resistor five is connected to one end of resistor six in one path and to one end of bidirectional transient suppression diode four in the other path; the other end of resistor six is ​​connected to one end of resistor seven and then to one end of capacitor ten in the input positive electrode of the photoelectric coupler; the other end of bidirectional transient suppression diode four is connected to the other end of resistor seven and then to the other end of capacitor ten in the other path and then to ground and to the input negative electrode of the photoelectric coupler; the output collector of the photoelectric coupler is connected to one end of resistor eight in one path and to one end of capacitor eleven in the other path; the other end of resistor eight serves as the output end of the second power supply circuit, and the output emitter of the photoelectric coupler and the other end of capacitor eleven are both grounded.

7. The fully digital monitoring and control device for a power switch cabinet according to claim 6 is characterized in that: Another path of the output collector of the optocoupler of the second power supply circuit is connected to an I / O terminal of the shutdown control microcontroller, and when the second power supply circuit is powered off, a power-off signal is fed back to the shutdown control microcontroller.

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