A safety control system for high and low voltage switchgear

Abstract

The present invention discloses a high- and low-voltage switchgear safety control system, which relates to the field of switchgear technology. The system includes a microcontroller module that controls a first power module to cooperate with a first output module to provide direct current (DC) power, and a second power module to cooperate with a second output module to provide DC power. A drive protection module performs voltage limiting and overvoltage protection, and controls the first power module or the second power module to stop operating in the event of overvoltage. When providing alternating current (AC) power, the microcontroller module controls the first and second power modules to invert the AC power and output it through a third output module. When the voltage range of the AC power needs to be increased, the first and third output modules can be controlled to perform power superposition, and the second and third output modules can be controlled to perform power superposition. The microcontroller module can also control the first and second power modules to supply power to each other. The high- and low-voltage switchgear safety control system of the present invention improves power supply efficiency and voltage range, and increases power supply types.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinets, in particular to a high and low voltage switch cabinet safety control system. Background Art

[0002] High and low voltage switchgear is a key device for distributing, controlling and protecting electric energy in power systems. It is a key device that can realize switching between high and low voltage power sources and diversified power distribution. In the existing technology, high and low voltage switchgear can use power converters composed of field effect transistors, transformers, etc. to realize DC-AC and AC-DC conversion of electric energy. However, since the set power converter has a certain voltage output range, it is impossible to provide a wider voltage output range. In addition, in order to realize DC-AC and AC-DC conversion, different DC-AC power converters and AC-DC converters will be used, which increases the cost of the switchgear. Therefore, it needs to be improved. Summary of the Invention

[0003] The embodiments of the present invention provide a high and low voltage switch cabinet safety control system to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a high and low voltage switchgear safety control system is provided, comprising:

[0005] The first power module is connected to the second power module and the micro-control module, and is used to perform isolated high-frequency power regulation on the first DC power or the second DC power received by the second power module and output the first power, perform inversion and output the third power, and transmit the first DC power to the second power module upon receiving the first control signal output by the micro-control module;

[0006] a second power module, connected to the micro-control module, configured to perform isolated high-frequency power conditioning processing on the second DC power or the first DC power and output the second power, perform inversion processing and output the fourth power, and transmit the second DC power to the first power module upon receiving a second control signal output by the micro-control module;

[0007] a drive protection module connected to the first power module and the second power module, configured to limit the voltage of the first power module and the second power module, perform overvoltage detection on the first DC power and the second DC power, output a first detection signal and control the first power module to be powered off when the first DC power is overvoltage, and output a second detection signal and control the second power module to be powered off when the second DC power is overvoltage;

[0008] a microcontrol module connected to the drive protection module, configured to control the first power module to perform power regulation when the first DC power is connected, control the second power module to perform power regulation when the second DC power is connected, control the first power module and the second power module to perform inversion when AC power is required, perform voltage sampling on the third output module, output a second control signal when the first DC power is not connected and AC power is required, output the first control signal when the second DC power is not connected and AC power is required, and output a third control signal or a fourth control signal when the output voltage range of the AC power needs to be increased;

[0009] a first output module connected to the microcontroller module, the first power module, and the third output module, configured to rectify, filter, and output the first electric energy, and transmit the first electric energy to the third output module upon receiving a third control signal;

[0010] a second output module connected to the third output module, the second power module and the micro-control module, configured to rectify and filter the second electric energy and output it, and transmit the second electric energy to the third output module upon receiving a fourth control signal;

[0011] The third output module is connected to the first power module, the second power module and the micro-control module, and is used to transform the third electric energy and the fourth electric energy and output the fifth electric energy. When receiving the third control signal, the third electric energy and the fourth electric energy are superimposed on each other, and when receiving the fourth control signal, the fifth electric energy is superimposed on each other.

[0012] As a further solution of the present invention: the first power module includes a first power port, a first capacitor, a first absorption device, a first inductor, a first transformer, a first power tube and a second power tube; the micro control module includes a first controller;

[0013] Preferably, the first end of the first power port is connected to one end of the first capacitor, one end of the first absorption device and the first end of the primary side of the first transformer, and is connected to the other end of the first absorption device, the second end of the primary side of the first transformer and the drain of the first power tube through the first inductor. The source of the first power tube is connected to the drain of the second power tube. The source of the second power tube is connected to the other end of the first capacitor and the second end of the first power port. The gate of the first power tube and the gate of the second power tube are respectively connected to the IO1 end and IO2 end of the first controller, and the secondary side of the first transformer is connected to the first output module.

[0014] As a further solution of the present invention: the driving protection module includes a first resistor, a first diode, a seventh capacitor, a second diode, a third switch tube, a third diode, a second capacitor and a second resistor;

[0015] Preferably, the anode of the second diode is connected to the cathode of the first diode, the collector of the third switching tube, one end of the seventh capacitor and the IO8 end of the first controller and is connected to the first end of the first power port through the first resistor, the cathode of the second diode is connected to the cathode of the third diode and one end of the second capacitor and is connected to the gate of the first power tube through the second resistor, the anode of the third diode is connected to the other end of the second capacitor and the source of the first power tube, the anode of the first diode is connected to the second end of the first power port, the emitter of the third switching tube and the other end of the seventh capacitor, and the base of the third switching tube is connected to the IO12 end of the first controller.

[0016] As a further solution of the present invention: the second power module includes a second power port, a third capacitor, a third power tube, a second absorption device, a fourth power tube, a second inductor and a second transformer;

[0017] Preferably, the first end of the second power port is connected to one end of the third capacitor, one end of the second absorption device and the first end of the primary side of the second transformer and is connected to the second end of the primary side of the second transformer, the other end of the second absorption device and the drain of the fourth power tube through the second inductor, the source of the fourth power tube is connected to the drain of the third power tube, the source of the third power tube is connected to the second end of the second power port, the other end of the third capacitor and the second end of the first power port, the gate of the third power tube and the gate of the fourth power tube are respectively connected to the IO3 end and IO4 end of the first controller, and the secondary side of the second transformer is connected to the second output module.

[0018] As a further solution of the present invention: the first power module further includes a sixth power tube; the second power module further includes a fifth power tube;

[0019] Preferably, the source of the sixth power tube is connected to the first end of the first power port, the drain of the sixth power tube is connected to the drain of the fifth power tube, the source of the fifth power tube is connected to the first end of the second power port, and the gate of the fifth power tube and the gate of the sixth power tube are respectively connected to the IO11 end and IO10 end of the first controller.

[0020] As a further solution of the present invention: the driving protection module further includes a third resistor, a fourth diode, an eighth capacitor, a fourth switch tube, a fifth diode, a sixth diode, a fourth capacitor and a fourth resistor;

[0021] Preferably, the cathode of the fourth diode is connected to the anode of the fifth diode, the collector of the fourth switch tube, one end of the eighth capacitor and the IO9 end of the first controller and is connected to the first end of the second power port through the third resistor, the anode of the fourth diode is connected to the second end of the second power port, the emitter of the fourth switch tube and the other end of the eighth capacitor, the cathode of the fifth diode is connected to the cathode of the sixth diode and one end of the fourth capacitor and is connected to the gate of the fourth power tube through the fourth resistor, the anode of the sixth diode is connected to the other end of the fourth capacitor and the source of the fourth power tube, and the base of the fourth switch tube is connected to the IO13 end of the first control.

[0022] As a further solution of the present invention: the first output module includes a first thyristor, a second thyristor, a seventh diode, a fifth capacitor and a first port;

[0023] Preferably, the first end of the first thyristor is connected to the first end of the secondary side of the first transformer and the first end of the first port and is connected to the second end of the first port and the cathode of the seventh diode through the fifth capacitor, the anode of the seventh diode is connected to the first end of the second thyristor and the second end of the secondary side of the first transformer, the second end of the first thyristor and the second end of the second thyristor are both connected to the third output module, and the control end of the first thyristor and the control end of the second thyristor are both connected to the IO5 end of the first controller.

[0024] As a further solution of the present invention: the second output module includes a third thyristor, a fourth thyristor, an eighth diode, a sixth capacitor and a second port;

[0025] Preferably, the first end of the fourth thyristor is connected to the first end of the secondary side of the second transformer and the anode of the eighth diode, the cathode of the eighth diode is connected to the first end of the second port and is connected to the second end of the second port, the first end of the third thyristor and the second end of the secondary side of the second transformer through the sixth capacitor, the second end of the fourth thyristor and the second end of the third thyristor are both connected to the third output module, and the control end of the third thyristor and the control end of the fourth thyristor are both connected to the IO6 end of the first controller.

[0026] As a further solution of the present invention: the third output module includes a third transformer, a fifth thyristor, a sixth thyristor, a first power supply, a fifth resistor, a sixth resistor, a first switch tube, a second switch tube, a seventh resistor, a third port and an eighth resistor;

[0027] Preferably, the first end and the second end of the primary side of the third transformer are connected to the source of the first power tube and the source of the fourth power tube respectively, the first end of the secondary side of the third transformer is connected to the second end of the first thyristor and one end of the fifth thyristor, the other end of the fifth thyristor is connected to the second end of the second thyristor and the first end of the third port, the second end of the secondary side of the third transformer is connected to the second end of the third thyristor and one end of the sixth thyristor, the other end of the sixth thyristor is connected to the second end of the fourth thyristor and the second end of the third port, the control end of the fifth thyristor is connected to the collector of the second switching tube and is connected to the first power supply and one end of the fifth resistor through a sixth resistor, the other end of the fifth resistor is connected to the control end of the sixth thyristor and the collector of the first switching tube, the emitter of the first switching tube and the emitter of the second switching tube are both grounded, the base of the first switching tube is connected to the IO6 end of the first controller through an eighth resistor, and the base of the second switching tube is connected to the IO5 end of the first controller through a seventh resistor.

[0028] As a further solution of the present invention: the microcontroller module further includes a ninth resistor and a tenth resistor;

[0029] Preferably, one end of the ninth resistor is connected to the first end of the third port, and the other end of the ninth resistor is connected to the IO7 end of the first controller and is connected to the second end of the third port through the tenth resistor.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: the high and low voltage switchgear safety control system of the present invention can control the first power module by the microcontrol module to perform isolated high-frequency transformation and regulation processing, cooperate with the first output module to provide DC power, control the second power module to perform isolated high-frequency transformation and regulation processing, cooperate with the second output module to provide DC power, and the drive protection module performs voltage limiting drive and overvoltage protection on the first power module and the second power module, and controls the first power module or the second power module to stop working when overvoltage occurs. When AC power needs to be provided, the microcontrol module can control the first power module and the second power module to perform inversion work, and the third output module provides AC power. When the voltage range of AC power needs to be increased, the first output module can be controlled to superimpose the input power with the output power of the third output module, and the second output module can be controlled to superimpose the input power with the third output module. The microcontrol module can also control the first power module and the second power module to supply power to each other, thereby improving power supply efficiency and power supply voltage range, and increasing power supply types. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic block diagram of a high and low voltage switchgear safety control system provided by an embodiment of the present invention.

[0033] Figure 2 A circuit diagram of a high and low voltage switchgear safety control system provided by an embodiment of the present invention.

[0034] Figure 3 This is a circuit diagram of a drive protection module provided by an embodiment of the present invention.

[0035] Figure 4 This is a circuit diagram of the first output module provided in an embodiment of the present invention.

[0036] Figure 5 This is a circuit diagram of the second output module provided in an embodiment of the present invention.

[0037] Figure 6 This is a circuit diagram of the third output module provided in an embodiment of the present invention.

[0038] Figure 7 This is a circuit diagram of a microcontroller module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] In one embodiment, see Figure 1 , a high and low voltage switchgear safety control system, comprising:

[0041] The first power module 1 is connected to the second power module 2 and the micro-control module 4, and is used to perform isolated high-frequency power regulation on the first DC power or the second DC power received by the second power module 2 and output the first power, perform inversion and output the third power, and transmit the first DC power to the second power module 2 upon receiving the first control signal output by the micro-control module 4;

[0042] The second power module 2 is connected to the micro-control module 4 and is used to perform isolated high-frequency power conditioning processing on the second DC power or the first DC power and output the second power, perform inversion processing and output the fourth power, and transmit the second DC power to the first power module 1 upon receiving the second control signal output by the micro-control module 4;

[0043] a drive protection module 3 connected to the first power module 1 and the second power module 2, configured to limit the voltage of the first power module 1 and the second power module 2, and perform overvoltage detection on the first DC power and the second DC power. When the first DC power is overvoltage, the drive protection module 3 outputs a first detection signal and controls the first power module 1 to be powered off. When the second DC power is overvoltage, the drive protection module 3 outputs a second detection signal and controls the second power module 2 to be powered off.

[0044] The microcontrol module 4 is connected to the drive protection module 3 and is used to control the first power module 1 to perform power regulation when the first DC power is connected, control the second power module 2 to perform power regulation when the second DC power is connected, control the first power module 1 and the second power module 2 to perform inversion when AC power is required, and perform voltage sampling on the third output module 7. When the first DC power is not connected and AC power is required, the microcontroller outputs the second control signal, when the second DC power is not connected and AC power is required, the microcontroller outputs the first control signal, and outputs the third control signal or the fourth control signal when the output voltage range of the AC power needs to be increased.

[0045] The first output module 5 is connected to the micro-control module 4, the first power module 1 and the third output module 7, and is used to rectify, filter and output the first electric energy, and transmit the first electric energy to the third output module 7 upon receiving the third control signal;

[0046] The second output module 6 is connected to the third output module 7, the second power module 2 and the micro-control module 4, and is used to rectify and filter the second electric energy and output it, and transmit the second electric energy to the third output module 7 when receiving the fourth control signal;

[0047] The third output module 7 is connected to the first power module 1, the second power module 2 and the micro-control module 4, and is used to transform the third electric energy and the fourth electric energy and output the fifth electric energy. When receiving the third control signal, it is superimposed with the first electric energy, and when receiving the fourth control signal, it is superimposed with the second electric energy.

[0048] In a specific embodiment, the first power module 1 can adopt a first power circuit composed of a power port, an absorption device, a transformer, a field effect transistor, etc., which can perform isolated high-frequency power regulation processing and voltage limiting protection control on the connected DC power; the second power module 2 can adopt a second power circuit composed of a power port, an absorption device, a transformer, a field effect transistor, etc., which can perform isolated high-frequency power regulation processing and voltage limiting protection control on the connected DC power; the driving protection circuit composed of the resistor, diode and capacitor of the driving protection module 3 can perform overvoltage detection on the first power module 1 and the second power module 2 and drive the first power module 1 and the second power module 2 to perform voltage limiting work, and when overvoltage occurs, control the first power module 1 and the second power module 2 to stop working; the micro control module 4 A microcontroller circuit composed of a single-chip microcomputer and resistors can be used, which integrates many components such as an arithmetic unit, a controller, a memory, and an input and output device to realize functions such as signal processing, data storage, module control, and timing control, and can perform voltage sampling processing on the electric energy output by the output module; the above-mentioned first output module 5 can adopt a first output circuit composed of thyristors, diodes, capacitors, etc., which can control the transmission path of electric energy and perform rectification and filtering work; the above-mentioned second output module 6 can adopt a second output circuit composed of thyristors, diodes, capacitors, etc., which can control the transmission path of electric energy and perform rectification and filtering work; the above-mentioned third output module 7 can adopt a third output circuit composed of thyristors, transistors, transformers, etc., which can perform voltage regulation, control the transmission path of electric energy, and control the superposition of electric energy voltage.

[0049] In another embodiment, see Figure 1 、 Figure 2 and Figure 3 The first power module 1 includes a first power port, a first capacitor C1, a first absorption device, a first inductor L1, a first transformer B1, a first power tube Q1 and a second power tube Q2; the micro control module 4 includes a first controller U1;

[0050] Specifically, the first end of the first power port is connected to one end of the first capacitor C1, one end of the first absorption device and the first end of the primary side of the first transformer B1, and is connected to the other end of the first absorption device, the second end of the primary side of the first transformer B1 and the drain of the first power tube Q1 through the first inductor L1. The source of the first power tube Q1 is connected to the drain of the second power tube Q2. The source of the second power tube Q2 is connected to the other end of the first capacitor C1 and the second end of the first power port. The gate of the first power tube Q1 and the gate of the second power tube Q2 are respectively connected to the IO1 end and IO2 end of the first controller U1. The secondary side of the first transformer B1 is connected to the first output module 5.

[0051] In a specific embodiment, the above-mentioned first absorption device can adopt an RCD absorption device; the above-mentioned first power tube Q1 and the second power tube Q2 can both be N-channel field effect tubes, wherein the first power tube Q1 performs voltage limiting protection and the second power tube Q2 performs power regulation control; the above-mentioned first controller U1 can adopt an STM32 microcontroller.

[0052] Furthermore, the driving protection module 3 includes a first resistor R1, a first diode D1, a seventh capacitor C7, a second diode D2, a third switch tube V3, a third diode D3, a second capacitor C2 and a second resistor R2;

[0053] Specifically, the anode of the second diode D2 is connected to the cathode of the first diode D1, the collector of the third switch tube V3, one end of the seventh capacitor C7 and the IO8 terminal of the first controller U1, and is connected to the first end of the first power port through the first resistor R1. The cathode of the second diode D2 is connected to the cathode of the third diode D3 and one end of the second capacitor C2 and is connected to the gate of the first power tube Q1 through the second resistor R2. The anode of the third diode D3 is connected to the other end of the second capacitor C2 and the source of the first power tube Q1. The anode of the first diode D1 is connected to the second end of the first power port, the emitter of the third switch tube V3 and the other end of the seventh capacitor C7. The base of the third switch tube V3 is connected to the IO12 terminal of the first controller U1.

[0054] In a specific embodiment, the first resistor R1 and the first diode D1 set the overvoltage threshold and perform overvoltage detection; the electric energy transmitted by the seventh capacitor C7 and the first resistor R1 controls the first power tube Q1 to quickly follow and turn on; the third switch tube V3 can be an NPN transistor.

[0055] Furthermore, the second power module 2 includes a second power port, a third capacitor C3, a third power tube Q3, a second absorption device, a fourth power tube Q4, a second inductor L2 and a second transformer B2;

[0056] Specifically, the first end of the second power port is connected to one end of the third capacitor C3, one end of the second absorption device and the first end of the primary side of the second transformer B2, and is connected to the second end of the primary side of the second transformer B2, the other end of the second absorption device and the drain of the fourth power tube Q4 through the second inductor L2. The source of the fourth power tube Q4 is connected to the drain of the third power tube Q3. The source of the third power tube Q3 is connected to the second end of the second power port, the other end of the third capacitor C3 and the second end of the first power port. The gate of the third power tube Q3 and the gate of the fourth power tube Q4 are respectively connected to the IO3 terminal and IO4 terminal of the first controller U1. The secondary side of the second transformer B2 is connected to the second output module 6.

[0057] In a specific embodiment, the third power tube Q3 and the fourth power tube Q4 can both be N-channel field effect tubes; and the second absorption device can be an RCD absorption device.

[0058] Furthermore, the first power module 1 further includes a sixth power tube Q6; the second power module 2 further includes a fifth power tube Q5;

[0059] Specifically, the source of the sixth power tube Q6 is connected to the first end of the first power port, the drain of the sixth power tube Q6 is connected to the drain of the fifth power tube Q5, the source of the fifth power tube Q5 is connected to the first end of the second power port, and the gate of the fifth power tube Q5 and the gate of the sixth power tube Q6 are respectively connected to the IO11 terminal and IO10 terminal of the first controller U1.

[0060] In a specific embodiment, both the sixth power tube Q6 and the fifth power tube Q5 can be N-channel field effect tubes.

[0061] Furthermore, the driving protection module 3 further includes a third resistor R3, a fourth diode D4, an eighth capacitor C8, a fourth switch tube V4, a fifth diode D5, a sixth diode D6, a fourth capacitor C4 and a fourth resistor R4;

[0062] Specifically, the cathode of the fourth diode D4 is connected to the anode of the fifth diode D5, the collector of the fourth switch tube V4, one end of the eighth capacitor C8 and the IO9 terminal of the first controller U1 and is connected to the first end of the second power port through the third resistor R3. The anode of the fourth diode D4 is connected to the second end of the second power port, the emitter of the fourth switch tube V4 and the other end of the eighth capacitor C8. The cathode of the fifth diode D5 is connected to the cathode of the sixth diode D6 and one end of the fourth capacitor C4 and is connected to the gate of the fourth power tube Q4 through the fourth resistor R4. The anode of the sixth diode D6 is connected to the other end of the fourth capacitor C4 and the source of the fourth power tube Q4. The base of the fourth switch tube V4 is connected to the IO13 terminal of the first control.

[0063] In a specific embodiment, the third resistor R3 and the fourth diode D4 set an overvoltage threshold and perform overvoltage detection; the fourth switch tube V4 can be an NPN transistor.

[0064] In another embodiment, see Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , the first output module 5 includes a first thyristor S1, a second thyristor S2, a seventh diode D7, a fifth capacitor C5 and a first port;

[0065] Specifically, the first end of the first thyristor S1 is connected to the first end of the secondary side of the first transformer B1 and the first end of the first port, and is connected to the second end of the first port and the cathode of the seventh diode D7 through the fifth capacitor. The anode of the seventh diode D7 is connected to the first end of the second thyristor S2 and the second end of the secondary side of the first transformer B1. The second end of the first thyristor S1 and the second end of the second thyristor S2 are both connected to the third output module 7. The control end of the first thyristor S1 and the control end of the second thyristor S2 are both connected to the IO5 end of the first controller U1.

[0066] In a specific embodiment, both the first thyristor S1 and the second thyristor S2 can be bidirectional thyristors.

[0067] Furthermore, the second output module 6 includes a third thyristor S3, a fourth thyristor S4, an eighth diode D8, a sixth capacitor C6 and a second port;

[0068] Specifically, the first end of the fourth thyristor S4 is connected to the first end of the secondary side of the second transformer B2 and the anode of the eighth diode D8, the cathode of the eighth diode D8 is connected to the first end of the second port and is connected to the second end of the second port, the first end of the third thyristor S3 and the second end of the secondary side of the second transformer B2 through the sixth capacitor C6, the second end of the fourth thyristor S4 and the second end of the third thyristor S3 are both connected to the third output module 7, and the control end of the third thyristor S3 and the control end of the fourth thyristor S4 are both connected to the IO6 end of the first controller U1.

[0069] In a specific embodiment, both the third thyristor S3 and the fourth thyristor S4 can be bidirectional thyristors.

[0070] Furthermore, the third output module 7 includes a third transformer B3, a fifth thyristor S5, a sixth thyristor S6, a first power supply VCC1, a fifth resistor R5, a sixth resistor R6, a first switch tube V1, a second switch tube V2, a seventh resistor R7, a third port and an eighth resistor R8;

[0071] Specifically, the first end and the second end of the primary side of the third transformer B3 are connected to the source of the first power tube Q1 and the source of the fourth power tube Q4, respectively. The first end of the secondary side of the third transformer B3 is connected to the second end of the first thyristor S1 and one end of the fifth thyristor S5. The other end of the fifth thyristor S5 is connected to the second end of the second thyristor S2 and the first end of the third port. The second end of the secondary side of the third transformer B3 is connected to the second end of the third thyristor S3 and one end of the sixth thyristor S6. The other end of the sixth thyristor S6 is connected to the second end of the fourth thyristor S4 and the third port. The second end of the port is connected to the collector of the second switching tube V2, the control end of the fifth thyristor S5 is connected to the first power supply VCC1 and one end of the fifth resistor R5 through the sixth resistor R6, the other end of the fifth resistor R5 is connected to the control end of the sixth thyristor S6 and the collector of the first switching tube V1, the emitter of the first switching tube V1 and the emitter of the second switching tube V2 are both grounded, the base of the first switching tube V1 is connected to the IO6 terminal of the first controller U1 through the eighth resistor R8, and the base of the second switching tube V2 is connected to the IO5 terminal of the first controller U1 through the seventh resistor R7.

[0072] In a specific embodiment, the fifth thyristor S5 and the sixth thyristor S6 may be bidirectional thyristors; the first switch tube V1 and the second switch tube V2 may be NPN transistors.

[0073] Furthermore, the micro-control module 4 further includes a ninth resistor R9 and a tenth resistor R10;

[0074] Specifically, one end of the ninth resistor R9 is connected to the first end of the third port, and the other end of the ninth resistor R9 is connected to the IO7 terminal of the first controller U1 and is connected to the second end of the third port through the tenth resistor R10.

[0075] In a specific embodiment, the above-mentioned ninth resistor R9 and tenth resistor R10 form a voltage divider circuit to perform voltage sampling on the third port and receive it by the IO7 terminal of the first controller U1. The voltage divider circuit can also be used to perform voltage sampling on the first output module 5 and the second output module 6, and receive it by the first controller U1.

[0076] In a high and low voltage switchgear safety control system of the present embodiment, a first DC power is connected to a first power port, and the first power tube Q1 is triggered to turn on through the first resistor R1, the seventh capacitor C7, the second diode D2 and the second resistor R2. The IO2 end of the first controller U1 controls the conduction state of the second power tube Q2, cooperates with the first transformer B1 and the first inductor L1 to perform isolated high-frequency voltage transformation and regulation processing and output the first power, and the first absorption device absorbs the peak voltage. Similarly, the IO3 end of the first controller U1 controls the conduction state of the third power tube Q3, cooperates with the second inductor L2 and the second transformer B2 to perform isolated high-frequency voltage transformation processing on the second DC power connected to the second power port and output the second power, and the second absorption device absorbs the peak voltage. The device absorbs the peak voltage, and the first electric energy output is rectified and filtered by the seventh diode D7 and the fifth capacitor, and then transmitted to the first port. The second electric energy is rectified and filtered by the eighth diode D8 and the sixth capacitor C6, and then output from the second port. When AC power is needed, the IO1, IO2, IO3 and IO4 terminals of the first controller U1 can respectively control the first power tube Q1, the second power tube Q2, the third power tube Q3 and the fourth power tube Q4 to be turned on, and invert the input electric energy. At the same time, the IO12 and IO13 terminals of the first controller U1 trigger the third switch tube V3 and the fourth switch tube V4 to be turned on. The inverted electric energy is isolated and transformed by the third transformer B3, and then the fifth The thyristor S5 and the sixth thyristor S6 are transmitted to the third port. When the voltage range of the output AC power needs to be increased, when the first controller U1 drives the first power tube Q1 and the third power tube Q3 to be turned on, the IO5 terminal of the first controller U1 can output a third control signal to control the second switch tube V2, the first thyristor S1 and the second thyristor S2 to be turned on, and the fifth thyristor S5 to be turned off, so that when the first power tube Q1 and the third power tube Q3 are turned on, the electric energy after isolation and transformation of the first transformer B1 and the electric energy after isolation and transformation of the third transformer B3 are superimposed and received by the third port. When the first controller U1 drives the second power tube Q2 and the fourth power tube Q4 to be turned on, the IO6 terminal of the first controller U1 The terminal outputs a fourth control signal to control the first switch tube V1, the third thyristor S3 and the fourth thyristor S4 to be turned on, and the sixth thyristor S6 to be turned off, so that the electric energy transformed by the second transformer B2 is superimposed on the electric energy transformed by the third transformer B3 to maintain the AC boost operation. At the same time, during the AC power supply period, if the first power port is not connected to the first DC power, the IO10 terminal of the first controller U1 controls the sixth power tube Q6 to be turned on, and the second DC power connected to the second power port is transmitted to the first transformer B1. Similarly, if the second power port is not connected to the second DC power, the IO11 terminal of the first controller U1 controls the fifth power tube Q5 to be turned on, and the first DC power is transmitted to the first power port to maintain the power conversion operation.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0078] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high and low voltage switchgear safety control system, characterized in that: The system includes: The first power module is connected to the second power module and the micro-control module, and is used to perform isolated high-frequency power regulation on the first DC power or the second DC power received by the second power module and output the first power, perform inversion and output the third power, and transmit the first DC power to the second power module upon receiving the first control signal output by the micro-control module; a second power module, connected to the micro-control module, configured to perform isolated high-frequency power conditioning processing on the second DC power or the first DC power and output the second power, perform inversion processing and output the fourth power, and transmit the second DC power to the first power module upon receiving a second control signal output by the micro-control module; a drive protection module connected to the first power module and the second power module, configured to limit the voltage of the first power module and the second power module, perform overvoltage detection on the first DC power and the second DC power, output a first detection signal and control the first power module to be powered off when the first DC power is overvoltage, and output a second detection signal and control the second power module to be powered off when the second DC power is overvoltage; a microcontrol module connected to the drive protection module, configured to control the first power module to perform power regulation when the first DC power is connected, control the second power module to perform power regulation when the second DC power is connected, control the first power module and the second power module to perform inversion when AC power is required, perform voltage sampling on the third output module, output a second control signal when the first DC power is not connected and AC power is required, output the first control signal when the second DC power is not connected and AC power is required, and output a third control signal or a fourth control signal when the output voltage range of the AC power needs to be increased; a first output module connected to the microcontroller module, the first power module, and the third output module, configured to rectify, filter, and output the first electric energy, and transmit the first electric energy to the third output module upon receiving a third control signal; a second output module connected to the third output module, the second power module and the micro-control module, configured to rectify and filter the second electric energy and output it, and transmit the second electric energy to the third output module upon receiving a fourth control signal; The third output module is connected to the first power module, the second power module and the micro-control module, and is used to transform the third electric energy and the fourth electric energy and output the fifth electric energy. When receiving the third control signal, the third electric energy and the fourth electric energy are superimposed on each other, and when receiving the fourth control signal, the fifth electric energy is superimposed on each other.

2. A high and low voltage switchgear safety control system according to claim 1, characterized in that: The first power module includes a first power port, a first capacitor, a first absorption device, a first inductor, a first transformer, a first power tube and a second power tube; the micro control module includes a first controller; The first end of the first power port is connected to one end of the first capacitor, one end of the first absorption device and the first end of the primary side of the first transformer, and is connected to the other end of the first absorption device, the second end of the primary side of the first transformer and the drain of the first power tube through the first inductor. The source of the first power tube is connected to the drain of the second power tube. The source of the second power tube is connected to the other end of the first capacitor and the second end of the first power port. The gate of the first power tube and the gate of the second power tube are connected to the IO1 end and IO2 end of the first controller respectively. The secondary side of the first transformer is connected to the first output module.

3. A high and low voltage switchgear safety control system according to claim 2, characterized in that: The driving protection module includes a first resistor, a first diode, a seventh capacitor, a second diode, a third switch tube, a third diode, a second capacitor and a second resistor; The anode of the second diode is connected to the cathode of the first diode, the collector of the third switching tube, one end of the seventh capacitor and the IO8 end of the first controller and is connected to the first end of the first power port through the first resistor, the cathode of the second diode is connected to the cathode of the third diode and one end of the second capacitor and is connected to the gate of the first power tube through the second resistor, the anode of the third diode is connected to the other end of the second capacitor and the source of the first power tube, the anode of the first diode is connected to the second end of the first power port, the emitter of the third switching tube and the other end of the seventh capacitor, and the base of the third switching tube is connected to the IO12 end of the first controller.

4. A high and low voltage switchgear safety control system according to claim 3, characterized in that: The second power module includes a second power port, a third capacitor, a third power tube, a second absorption device, a fourth power tube, a second inductor and a second transformer; The first end of the second power port is connected to one end of the third capacitor, one end of the second absorption device and the first end of the primary side of the second transformer, and is connected to the second end of the primary side of the second transformer, the other end of the second absorption device and the drain of the fourth power tube through the second inductor. The source of the fourth power tube is connected to the drain of the third power tube. The source of the third power tube is connected to the second end of the second power port, the other end of the third capacitor and the second end of the first power port. The gate of the third power tube and the gate of the fourth power tube are respectively connected to the IO3 terminal and IO4 terminal of the first controller. The secondary side of the second transformer is connected to the second output module.

5. A high and low voltage switch cabinet safety control system according to claim 4, characterized in that: The first power module further includes a sixth power tube; the second power module further includes a fifth power tube; The source of the sixth power tube is connected to the first end of the first power port, the drain of the sixth power tube is connected to the drain of the fifth power tube, the source of the fifth power tube is connected to the first end of the second power port, and the gate of the fifth power tube and the gate of the sixth power tube are respectively connected to the IO11 end and IO10 end of the first controller.

6. A high and low voltage switchgear safety control system according to claim 4, characterized in that: The driving protection module further includes a third resistor, a fourth diode, an eighth capacitor, a fourth switch tube, a fifth diode, a sixth diode, a fourth capacitor and a fourth resistor; The cathode of the fourth diode is connected to the anode of the fifth diode, the collector of the fourth switch tube, one end of the eighth capacitor and the IO9 end of the first controller and is connected to the first end of the second power port through the third resistor. The anode of the fourth diode is connected to the second end of the second power port, the emitter of the fourth switch tube and the other end of the eighth capacitor. The cathode of the fifth diode is connected to the cathode of the sixth diode and one end of the fourth capacitor and is connected to the gate of the fourth power tube through the fourth resistor. The anode of the sixth diode is connected to the other end of the fourth capacitor and the source of the fourth power tube. The base of the fourth switch tube is connected to the IO13 end of the first control.

7. A high and low voltage switch cabinet safety control system according to claim 4, characterized in that: The first output module includes a first thyristor, a second thyristor, a seventh diode, a fifth capacitor and a first port; The first end of the first thyristor is connected to the first end of the secondary side of the first transformer and the first end of the first port, and is connected to the second end of the first port and the cathode of the seventh diode through the fifth capacitor. The anode of the seventh diode is connected to the first end of the second thyristor and the second end of the secondary side of the first transformer. The second end of the first thyristor and the second end of the second thyristor are both connected to the third output module, and the control end of the first thyristor and the control end of the second thyristor are both connected to the IO5 end of the first controller.

8. A high and low voltage switch cabinet safety control system according to claim 7, characterized in that: The second output module includes a third thyristor, a fourth thyristor, an eighth diode, a sixth capacitor and a second port; The first end of the fourth thyristor is connected to the first end of the secondary side of the second transformer and the anode of the eighth diode, the cathode of the eighth diode is connected to the first end of the second port and is connected to the second end of the second port, the first end of the third thyristor and the second end of the secondary side of the second transformer through the sixth capacitor, the second end of the fourth thyristor and the second end of the third thyristor are both connected to the third output module, and the control end of the third thyristor and the control end of the fourth thyristor are both connected to the IO6 end of the first controller.

9. A high and low voltage switchgear safety control system according to claim 8, characterized in that: The third output module includes a third transformer, a fifth thyristor, a sixth thyristor, a first power supply, a fifth resistor, a sixth resistor, a first switch tube, a second switch tube, a seventh resistor, a third port and an eighth resistor; The first end and the second end of the primary side of the third transformer are connected to the source of the first power tube and the source of the fourth power tube respectively. The first end of the secondary side of the third transformer is connected to the second end of the first thyristor and one end of the fifth thyristor. The other end of the fifth thyristor is connected to the second end of the second thyristor and the first end of the third port. The second end of the secondary side of the third transformer is connected to the second end of the third thyristor and one end of the sixth thyristor. The other end of the sixth thyristor is connected to the second end of the fourth thyristor and the second end of the third port. The control end of the fifth thyristor is connected to the collector of the second switching tube and is connected to the first power supply and one end of the fifth resistor through a sixth resistor. The other end of the fifth resistor is connected to the control end of the sixth thyristor and the collector of the first switching tube. The emitter of the first switching tube and the emitter of the second switching tube are both grounded. The base of the first switching tube is connected to the IO6 terminal of the first controller through an eighth resistor, and the base of the second switching tube is connected to the IO5 terminal of the first controller through a seventh resistor.

10. A high and low voltage switch cabinet safety control system according to claim 9, characterized in that: The micro-control module further includes a ninth resistor and a tenth resistor; One end of the ninth resistor is connected to the first end of the third port, the other end of the ninth resistor is connected to the IO7 end of the first controller and is connected to the second end of the third port through the tenth resistor.

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