Automatic integrated control system for relay protection of power system
By designing an integrated automatic control system for power system relay protection, and utilizing the collaborative work of multiple modules, reliable power outages under abnormal conditions are achieved. This solves the problems of protection cost and complexity when relay switches malfunction in existing technologies, and improves the safety and reliability of the power system.
Patent Information
- Application Number
- CN202511697288.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-01-30
AI Technical Summary
Existing power systems cannot reliably cut off power when relay switches malfunction, resulting in high protection costs and complex control. The configuration of auxiliary switches in existing technologies further increases protection costs and complexity.
An integrated automatic control system for power system relay protection was designed, including a power control module, a protection control module, a relay protection module, a signal detection module, a microcontroller module, a circuit breaker control module, a power transfer module, and a status judgment module. Through the coordinated work of these modules, power transmission, signal detection, overcurrent judgment, and multiple protection control are realized, ensuring that the relay protection module disconnects power when the safe disconnect voltage is reached.
It improves the safety and reliability of the power system, reduces the protection cost and control complexity in the relay protection process, and ensures reliable power outage in abnormal situations.
Smart Images
Figure CN121440480A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of power system protection, and particularly relates to a power system relay protection automation integrated control system. BACKGROUND
[0002] Relay protection is an automatic device for ensuring safe operation of a power system and electrical equipment under the condition of power system accidents or abnormal operation. Without the relay protection device, the normal operation of the power system cannot be maintained. In the prior art, in the relay protection process, in order to reduce the impact of fault power on the relay switch when the relay switch is disconnected, and to avoid the occurrence of electric sparks when the relay switch is disconnected, an energy transfer device and an energy absorption device are generally used to transfer energy and absorb energy when the relay switch is ready to be disconnected. However, when the relay switch is abnormal and cannot be disconnected, the disconnection protection cannot be completed. In order to further improve the disconnection reliability of the relay switch, an auxiliary switch with the same configuration as the relay switch is used to perform backup disconnection protection when the relay switch cannot be disconnected. However, using the auxiliary switch with the same configuration increases the protection cost and the protection control complexity, and therefore needs to be improved. SUMMARY
[0003] The embodiment of the present application provides a power system relay protection automation integrated control system to solve the problems in the background art.
[0004] According to the embodiment of the present application, a power system relay protection automation integrated control system is provided, which comprises: a power supply control module connected with a protection control module and a relay protection module, used to transmit the input direct current to the protection control module and the relay protection module; The protection control module is connected with the relay protection module and a circuit breaking control module, and is used to transmit the direct current input by the power supply control module or the power input to the relay protection module to the circuit breaking control module. The relay protection module is used to transmit the power transmitted by the power supply control module to an output module and perform overvoltage protection. The output module is connected with the relay protection module, and is used to receive the power transmitted by the relay protection module. The signal detection module is connected with the output module, and is used to perform current sampling and signal processing on the power received by the output module and output a first detection signal, perform overcurrent detection on the first detection signal, and output a second detection signal when overcurrent occurs. The micro control module is connected with the circuit breaking control module, the electric energy transfer module, the circuit breaking protection module, the power supply control module, the state judging module and the signal detecting module, and is used for controlling the circuit breaking control module to perform the electric energy transfer work, controlling the electric energy transfer module to provide the negative electric energy when the second detecting signal is received, controlling the circuit breaking protection module to be powered off and stopping the control of the electric energy transfer module and the circuit breaking control module when the circuit breaking protection module reaches the safe power-off voltage, controlling the electric energy transfer module to provide the negative electric energy again when the third detecting signal output by the state judging module is received, controlling the circuit breaking control module to perform the electric energy transfer, and controlling the power supply control module to be powered off and stopping the control of the electric energy transfer module and the circuit breaking control module when the power supply control module reaches the safe power-off voltage. The circuit breaking control module is connected with the electric energy transfer module, and is used for transferring the electric energy transmitted by the protection control module to the electric energy transfer module and absorbing the electric energy transmitted by the protection control module when the electric energy transfer is stopped. The electric energy transfer module is connected with the output module, and is used for storing the electric energy transferred by the circuit breaking control module and providing the negative electric energy under the control of the micro control module. The state judging module is connected with the protection control module and the signal detecting module, and is used for outputting the third detecting signal and controlling the power supply control module to transmit the input direct current to the circuit breaking control module and controlling the circuit breaking control module to stop receiving the electric energy input to the circuit breaking protection module when the micro control module stops controlling the circuit breaking control module to perform the electric energy transfer work and the first detecting signal is received.
[0005] As a further scheme of the present application, the power supply control module comprises a power distribution port, a second relay and a second relay switch; the micro control module comprises a first controller; and the circuit breaking protection module comprises a first relay, a first relay switch, a first inductor and a first voltage-dependent resistor. Preferably, the first end of the power distribution port is connected with the protection control module and the moving end of the second relay switch, the static end of the second relay switch is connected with the moving end of the first relay switch and the static end of the second relay switch and is connected with the first end of the first inductor through the first voltage-dependent resistor, the second end of the first inductor is connected with the static end of the first relay switch, and the IO4 end and the IO5 end of the first controller are respectively connected with the control end of the first relay and the control end of the second relay.
[0006] As a further scheme of the present application, the output module comprises an output port; and the signal detecting module comprises a first mutual inductor, a signal processing device, a first comparator and a first reference power supply. Preferably, the first end of the output port passes through the center of the first mutual inductor and is connected with the first end of the power port, the second end of the output port is connected with the second end of the power port, the first output end and the second output end of the first mutual inductor are connected with the first end and the second end of the signal processing device respectively, the third end of the signal processing device is connected with the non-inverting input terminal of the first comparator and the state judgment module, the inverting input terminal of the first comparator is connected with the first reference power supply, and the output terminal of the first comparator is connected with the IO3 terminal of the first controller.
[0007] As a further scheme of the present application, the electric energy transfer module comprises a first transformer, a second inductor, a second control tube, an eighth diode, a second capacitor, a first control tube and a third capacitor. Preferably, the first end of the primary side of the first transformer is connected with the source electrode of the second control tube, the anode of the eighth diode, one end of the second capacitor and one end of the third capacitor and is connected with the first end of the first inductor through the second inductor, the cathode of the eighth diode is connected with the drain electrode of the second control tube and the first end of the secondary side of the first transformer, the second end of the secondary side of the first transformer is connected with the other end of the second capacitor and the source electrode of the first control tube, the drain electrode of the first control tube is connected with the other end of the third capacitor, the gate electrode of the second control tube is connected with the IO2 terminal of the first controller, and the gate electrode of the first control tube is connected with the state judgment module.
[0008] As a further scheme of the present application, the circuit breaking control module comprises a first diode, a second diode, a first power tube, a third diode, a fourth diode, a first resistor, a first capacitor and a second voltage-dependent resistor. Preferably, the anode of the first diode is connected with the cathode of the third diode, one end of the second voltage-dependent resistor and the protection control module and is connected with the other end of the second voltage-dependent resistor, the cathode of the fourth diode, the anode of the second diode and the second end of the primary side of the first transformer in turn through the first resistor and the first capacitor, the cathode of the first diode is connected with the cathode of the second diode and the collector electrode of the first power tube, the emitter electrode of the first power tube is connected with the anode of the third diode and the anode of the fourth diode, and the gate electrode of the first power tube is connected with the IO1 terminal of the first controller.
[0009] As a further scheme of the present application, the state judgment module comprises a self-locking device, a first inverter, a first logic device, a fifth diode and a second logic device. Preferably, the input terminal of the self-locking device is connected with the input terminal of the first inverter and the IO1 terminal of the first controller, the output terminal of the self-locking device is connected with the A terminal of the first logic device, the output terminal of the first inverter is connected with the B terminal of the first logic device and the cathode of the fifth diode, the anode of the fifth diode is connected with the Y terminal of the first logic device and the B terminal of the second logic device, the A terminal of the second logic device is connected with the third end of the signal processing device, and the Y terminal of the second logic device is connected with the gate electrode of the first control tube, the IO6 terminal of the first controller and the protection control module.
[0010] As a further scheme of the present application: the protection control module comprises a second power tube, a seventh diode, a third resistor, a first switch tube, a second resistor, a third power tube and a sixth diode; Preferably, the collector of the second power tube is connected to the first end of the power distribution port, the emitter of the second power tube is connected to the anode of the seventh diode, the cathode of the seventh diode is connected to the cathode of the sixth diode and the anode of the first diode, the collector of the third power tube is connected to the static end of the second relay switch and the gate of the third power tube and the collector of the first switch tube through the second resistor, the emitter of the first switch tube is grounded, the base of the first switch tube is connected to the gate of the second power tube and the Y terminal of the second logic device through the third resistor, and the emitter of the third power tube is connected to the anode of the sixth diode.
[0011] Compared with the prior art, the power system relay protection automation integrated control system of the present application has the following advantages: the power supply control module and the relay protection module are used to control the transmission of electric energy and supply power to the output module, the signal detection module is used to detect the current of the output module, process signals and determine overcurrent, and when overcurrent occurs, the micro control module controls the electric energy transfer module to cooperate with the circuit breaking control module and the protection control module to control the transfer of electric energy, reduces the power input to the relay protection module, and when the relay protection module reaches the safe power-off voltage, the power-off control is performed, at this time, the state judgment module judges whether the relay protection module normally performs power-off protection when the transfer of electric energy is completed, and when the relay protection module does not complete the power-off control, the protection control module, the circuit breaking control module and the electric energy transfer module re-perform the safe power-off control of the power supply control module, multiple protection controls are performed, and the safety of the power system is improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.
[0013] Figure 1 A principle block diagram of the power system relay protection automation integrated control system provided by the embodiments of the present application is shown.
[0014] Figure 2 A circuit diagram of the power system relay protection automation integrated control system provided by the embodiments of the present application is shown.
[0015] Figure 3 A circuit diagram of the state judgment module provided by the embodiments of the present application is shown.
[0016] Figure 4 The circuit diagram of the protection control module provided in the embodiment of the present application. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.
[0018] In one embodiment, referring to Figure 1 The power system relay protection and automation integrated control system comprises a power supply control module 1, a protection control module 2 and a relay protection module 3 connected with the power supply control module 1, the protection control module 2 and the relay protection module 3, and is used for transmitting the accessed direct-current electric energy to the protection control module 2 and the relay protection module 3. The protection control module 2 is connected with the relay protection module 3 and a circuit breaking control module 7, and is used for transmitting the direct-current electric energy accessed by the power supply control module 1 or the electric energy input to the relay protection module 3 to the circuit breaking control module 7. The relay protection module 3 is used for transmitting the electric energy transmitted by the power supply control module 1 to an output module 4 and performing overvoltage protection. The output module 4 is connected with the relay protection module 3, and is used for receiving the electric energy transmitted by the relay protection module 3. The signal detection module 5 is connected with the output module 4, and is used for performing current sampling and signal processing on the electric energy received by the output module 4 and outputting a first detection signal, performing overcurrent detection on the first detection signal and outputting a second detection signal when overcurrent occurs. The micro control module 6 is connected with the circuit breaking control module 7, an electric energy transfer module 8, a circuit breaking protection module, the power supply control module 1, a state judgment module 9 and the signal detection module 5, and is used for controlling the circuit breaking control module 7 to perform electric energy transfer work, controlling the electric energy transfer module 8 to provide negative value electric energy when the second detection signal is received, controlling the relay protection module 3 to be powered off and stopping the control of the electric energy transfer module 8 and the circuit breaking control module 7 when the circuit breaking protection module reaches a safe power-off voltage, controlling the electric energy transfer module 8 to provide negative value electric energy again when the third detection signal output by the state judgment module 9 is received, controlling the circuit breaking control module 7 to perform electric energy transfer, and controlling the power supply control module 1 to be powered off and stopping the control of the electric energy transfer module 8 and the circuit breaking control module 7 when the power supply control module 1 reaches a safe power-off voltage. The circuit breaking control module 7 is connected with the electric energy transfer module 8, and is used for transferring the electric energy transmitted by the protection control module 2 to the electric energy transfer module 8 and absorbing the electric energy transmitted by the protection control module 2 when the electric energy transfer is stopped. The power transfer module 8 is connected with the output module 4, and is used for storing the power transferred by the circuit breaking control module 7 and providing negative power under the control of the micro control module 6; The state judging module 9 is connected with the protection control module 2 and the signal detecting module 5, and is used for outputting a third detecting signal and controlling the power supply control module 1 to transmit the input DC power to the circuit breaking control module 7 and controlling the circuit breaking control module 7 to stop receiving the power input to the relay protection module 3 when the micro control module 6 stops controlling the circuit breaking control module 7 to perform the power transfer work and the first detecting signal is received.
[0019] In the specific embodiment, the power supply control module 1 can adopt a power supply control circuit composed of a power distribution port, a relay and a relay switch, can input DC power and control the transmission of the DC power; the protection control module 2 can adopt a protection control circuit composed of IGBT, diode, triode and the like, controls the transmission path of the power and supplies power for the circuit breaking control module; the relay protection module 3 can adopt a relay protection circuit composed of a relay, an inductor, a voltage-dependent resistor and the like, can perform power transmission control, power-off protection and overvoltage protection; the output module 4 can adopt an output circuit composed of an output port, receives power and supplies power for the connected device; the signal detecting module 5 can adopt a signal detecting circuit composed of a current transformer, a signal processing device, a comparator and the like, can perform current sampling, signal processing and overcurrent detection on the power input to the output module 4; the micro control module 6 can adopt a micro control circuit composed of a single-chip microcomputer, integrates many components such as an arithmetic unit, a controller, a memory and an input-output unit, and realizes the functions of signal processing, data storage, module control, timing control and the like; the circuit breaking control module 7 can adopt a circuit breaking control circuit composed of IGBT, diode, capacitor, voltage-dependent resistor and the like, can perform power transfer control, power absorption and overvoltage protection; the power transfer module 8 can adopt a power transfer circuit composed of a transformer, a field effect transistor, a capacitor and the like, can perform double-path storage and provide negative voltage; the state judging module 9 can adopt a state judging circuit composed of a logic unit, an inverter, a self-locking device and the like, performs logic calculation on the input signal and judges whether the relay protection module 3 normally performs power-off protection work.
[0020] In another embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the power supply control module 1 includes a power distribution port, a second relay K2 and a second relay switch K2-1; the micro control module 6 includes a first controller U1; the relay protection module 3 includes a first relay K1, a first relay switch K1-1, a first inductor L1 and a first voltage-dependent resistor MOV1; Specifically, the first end of the power distribution port is connected to the moving end of the protection control module 2 and the second relay switch K2-1. The stationary end of the second relay switch K2-1 is connected to the moving end of the first relay switch K1-1 and the stationary end of the second relay switch K2-1, and is connected to the first end of the first inductor L1 through the first varistor MOV1. The second end of the first inductor L1 is connected to the stationary end of the first relay switch K1-1. The IO4 and IO5 ends of the first controller U1 are respectively connected to the control ends of the first relay K1 and the second relay K2.
[0021] In a specific embodiment, the second relay switch K2-1 can be a normally closed switch, controlled by the second relay K2 through magnetic attraction; the first relay switch K1-1 can be a normally closed switch, controlled by the first relay K1 in this manner; and the first controller U1 can be an STM32 microcontroller.
[0022] Furthermore, the output module 4 includes an output port; the signal detection module includes a first current transformer CT1, a signal processing device, a first comparator A1, and a first reference power supply VREF; Specifically, the first end of the output port passes through the center of the first current transformer CT1 and is connected to the first end of the power supply port. The second end of the output port is connected to the second end of the power supply port. The first output end and the second output end of the first current transformer CT1 are respectively connected to the first end and the second end of the signal processing device. The third end of the signal processing device is connected to the non-inverting end of the first comparator A1 and the state judgment module 9. The inverting end of the first comparator A1 is connected to the first reference power supply VREF. The output end of the first comparator A1 is connected to the IO3 end of the first controller U1.
[0023] In a specific embodiment, the first current transformer CT1 can be a current transformer; the signal processing device can be composed of resistors, capacitors, and operational amplifiers to convert the input into a voltage signal and amplify and filter the voltage signal; the first comparator A1 can be an LM358 comparator, which works with the first reference power supply VREF to perform overcurrent detection, wherein the first reference power supply VREF provides an overcurrent threshold.
[0024] Furthermore, the power transfer module 8 includes a first transformer B1, a second inductor L2, a second control transistor M2, an eighth diode D8, a second capacitor C2, a first control transistor M1, and a third capacitor C3; Specifically, the first end of the primary side of the first transformer B1 is connected to the source of the second control transistor M2, the anode of the eighth diode D8, one end of the second capacitor C2, and one end of the third capacitor C3, and is connected to the first end of the first inductor L1 through the second inductor L2. The cathode of the eighth diode D8 is connected to the drain of the second control transistor M2 and the first end of the secondary side of the first transformer B1. The second end of the secondary side of the first transformer B1 is connected to the other end of the second capacitor C2 and the source of the first control transistor M1. The drain of the first controller U1 is connected to the other end of the third capacitor C3. The gate of the second control transistor M2 is connected to the IO2 terminal of the first controller U1. The gate of the first control transistor M1 is connected to the state judgment module 9.
[0025] In a specific embodiment, both the second control transistor M2 and the first control transistor M1 can be N-channel field-effect transistors; both the second capacitor C2 and the third capacitor C3 can be energy storage capacitors.
[0026] Furthermore, the circuit breaker control module 7 includes a first diode D1, a second diode D2, a first power transistor Q1, a third diode D3, a fourth diode D4, a first resistor R1, a first capacitor C1, and a second varistor MOV2. Specifically, the anode of the first diode D1 is connected to the cathode of the third diode D3, one end of the second varistor MOV2, and the protection control module 2, and is sequentially connected to the other end of the second varistor MOV2, the cathode of the fourth diode D4, the anode of the second diode D2, and the second end of the primary side of the first transformer B1 through the first resistor R1 and the first capacitor C1. The cathode of the first diode D1 is connected to the cathode of the second diode D2 and the collector of the first power transistor Q1. The emitter of the first power transistor Q1 is connected to the anode of the third diode D3 and the anode of the fourth diode D4. The gate of the first power transistor Q1 is connected to the IO1 terminal of the first controller U1.
[0027] In a specific embodiment, the first power transistor Q1 can be an IGBT, which works in conjunction with the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 to control power transfer; the first resistor R1 and the first capacitor C1 are used for power absorption.
[0028] Furthermore, the state judgment module 9 includes a self-locking device, a first inverter INV1, a first logic unit J1, a fifth diode D5, and a second logic unit J2; Specifically, the input end of the self-locking device is connected with the input end of the first inverter INV1 and the IO1 end of the first controller U1, the output end of the self-locking device is connected with the A end of the first logic J1, the output end of the first inverter INV1 is connected with the B end of the first logic J1 and the cathode of the fifth diode D5, the anode of the fifth diode D5 is connected with the Y end of the first logic J1 and the B end of the second logic J2, the A end of the second logic J2 is connected with the third end of the signal processing device, the Y end of the second logic J2 is connected with the gate of the first control tube M1, the IO6 end of the first controller U1 and the protection control module 2.
[0029] In specific embodiments, the self-locking device can be composed of a triode and a resistor, and the input high level signal is self-locked; the first inverter INV1 can be selected as a NOT gate chip; the first logic J1 and the second logic J2 can be selected as AND gate chips.
[0030] Further, the protection control module 2 comprises a second power tube Q2, a seventh diode D7, a third resistor R3, a first switch tube V1, a second resistor R2, a third power tube Q3 and a sixth diode D6. Specifically, the collector of the second power tube Q2 is connected with the first end of the power distribution port, the emitter of the second power tube Q2 is connected with the anode of the seventh diode D7, the cathode of the seventh diode D7 is connected with the cathode of the sixth diode D6 and the anode of the first diode D1, the collector of the third power tube Q3 is connected with the static end of the second relay switch K2-1 and the gate of the third power tube Q3 and the collector of the first switch tube V1 through the second resistor R2, the emitter of the first switch tube V1 is grounded, the base of the first switch tube V1 is connected with the gate of the second power tube Q2 and the Y end of the second logic J2 through the third resistor R3, and the emitter of the third power tube Q3 is connected with the anode of the sixth diode D6.
[0031] In specific embodiments, the second power tube Q2 and the third power tube Q3 can be selected as IGBTs, and the first switch tube V1 can be selected as an NPN triode.
[0032] In the embodiment, the DC power is accessed by the power distribution port, and is transmitted to the output port through the second relay switch K2-1, the first relay switch K1-1 and the first inductor L1 in turn. At this time, the IO1 terminal of the first controller U1 controls the first power tube Q1 to be turned on, and the second resistor R2 triggers the third power tube Q3 to be turned on, so that the DC power is also transmitted to the first transformer B1 through the third power tube Q3, the first diode D1, the first power tube Q1 and the fourth diode D4. The IO1 terminal of the first controller U1 controls the on-off state of the first power tube Q1, and the self-locking device is high-level self-locked, so that the first transformer B1 is controlled to perform the voltage transformation work, and the power output by the first transformer B1 is stored in the second capacitor C2 and the third capacitor C3. The first current transformer CT1 samples the current of the power input to the output port, and the signal processing device processes the signal. When the processed signal is greater than the overcurrent threshold value set by the first reference power supply VREF, overcurrent occurs, the second detection signal is output by the first comparator A1 and is received by the IO3 terminal of the first controller U1. The first controller U1 controls the first relay K1 to be powered, and then controls the first relay switch K1-1 to be disconnected. Before the first relay switch K1-1 is disconnected, the IO2 terminal of the first controller U1 controls the second power tube Q2 to be turned on, so that the second capacitor C2 is discharged and cooperates with the first transformer B1 to provide negative power, and then forcibly controls the first power tube Q1 to transfer power, so as to reduce the power input to the first relay switch K1-1. Until the power input to the first relay switch K1-1 reaches the safe disconnection voltage of the first relay switch K1-1, the first relay switch K1-1 is disconnected, the IO1 terminal of the first controller U1 stops controlling the first power tube Q1 to be turned on, the first resistor R1 and the first capacitor C1 absorb power, the second voltage-dependent resistor MOV2 performs overvoltage protection, and the first inverter INV1 outputs high level, so that the first logic device J1 cooperates with the fifth diode D5 to be self-locked. At this time, if the first relay switch K1-1 is not disconnected, the signal processing device controls the A terminal of the second logic device J2 to be high level, the Y terminal of the second logic device J2 controls the first control tube M1, the second power tube Q2 and the first switch tube V1 to be turned on, the IO6 terminal of the first controller U1 becomes high level, and the IO5 terminal of the first controller U1 is ready to control the second relay K2 to be powered and control the second relay switch K2-1 to be disconnected. Before the second relay switch K2-1 is disconnected, the IO2 terminal and the IO1 terminal of the first controller U1 control the on-off state of the second control tube and the first power tube Q1 again, the third capacitor C3 and the first transformer B1 provide negative power, and then forcibly transfer power to the second relay switch K2-1. The first resistor R1 and the first capacitor C1 absorb power, the second voltage-dependent resistor MOV2 performs overvoltage protection, so as to control the disconnection of the second relay switch K2-1 when the safe disconnection voltage of the second relay switch K2-1 is reached.
[0033] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but that the application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.
[0034] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and a person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that can be understood by a person skilled in the art.
Claims
1. A power system relay protection automation integrated control system, characterized in that, The system comprises: The power supply control module is connected with the protection control module and the relay protection module, and is used for transmitting the accessed direct current power to the protection control module and the relay protection module; The protection control module is connected with the relay protection module and the circuit breaking control module, and is used for transmitting the direct current power accessed by the power supply control module or the power input to the relay protection module to the circuit breaking control module; The relay protection module is used for transmitting the power transmitted by the power supply control module to the output module and performing overvoltage protection; The output module is connected with the relay protection module, and is used for receiving the power transmitted by the relay protection module; The signal detection module is connected with the output module, and is used for performing current sampling and signal processing on the power received by the output module and outputting a first detection signal, performing overcurrent detection on the first detection signal, and outputting a second detection signal when overcurrent occurs; The micro control module is connected with the circuit breaking control module, the power transfer module, the circuit breaking protection module, the power supply control module, the state judgment module and the signal detection module, and is used for controlling the circuit breaking control module to perform power transfer work, controlling the power transfer module to provide negative value power when the second detection signal is received, controlling the relay protection module to be powered off and stopping the control of the power transfer module and the circuit breaking control module when the circuit breaking protection module reaches the safe power-off voltage, controlling the power transfer module to provide negative value power again when the third detection signal output by the state judgment module is received, controlling the circuit breaking control module to perform power transfer, and controlling the power supply control module to be powered off and stopping the control of the power transfer module and the circuit breaking control module when the power supply control module reaches the safe power-off voltage; The circuit breaking control module is connected with the power transfer module, and is used for transferring the power transmitted by the protection control module to the power transfer module and absorbing the power transmitted by the protection control module when the power transfer is stopped; The power transfer module is connected with the output module, and is used for storing the power transferred by the circuit breaking control module and providing negative value power under the control of the micro control module; The state judgment module is connected with the protection control module and the signal detection module, and is used for outputting the third detection signal and controlling the power supply control module to transmit the accessed direct current power to the circuit breaking control module and controlling the circuit breaking control module to stop receiving the power input to the relay protection module when the micro control module stops controlling the circuit breaking control module to perform power transfer work and the first detection signal is received.
2. The integrated control system for power system protection and automation according to claim 1, wherein, The power supply control module comprises a power distribution port, a second relay and a second relay switch; the micro control module comprises a first controller; the relay protection module comprises a first relay, a first relay switch, a first inductor and a first voltage-dependent resistor; The first end of the power distribution port is connected with the protection control module and the moving end of the second relay switch, the static end of the second relay switch is connected with the moving end of the first relay switch and the static end of the second relay switch, and the first end of the first inductor is connected with the first voltage-dependent resistor, the second end of the first inductor is connected with the static end of the first relay switch, and the IO4 end and the IO5 end of the first controller are respectively connected with the control end of the first relay and the control end of the second relay.
3. The integrated control system for power system protection and automation according to claim 2, wherein, The output module comprises an output port; the signal detection module comprises a first mutual inductor, a signal processing device, a first comparator and a first reference power supply; The first end of the output port passes through the center of the first mutual inductor and is connected with the first end of the power port, the second end of the output port is connected with the second end of the power port, the first output end and the second output end of the first mutual inductor are connected with the first end and the second end of the signal processing device respectively, the third end of the signal processing device is connected with the non-inverting input terminal of the first comparator and the state judgment module, the inverting input terminal of the first comparator is connected with the first reference power supply, and the output terminal of the first comparator is connected with the IO3 terminal of the first controller.
4. The integrated control system for power system protection and automation according to claim 3, wherein, The power transfer module comprises a first transformer, a second inductor, a second control tube, an eighth diode, a second capacitor, a first control tube and a third capacitor; The first end of the primary side of the first transformer is connected with the source electrode of the second control tube, the anode of the eighth diode, one end of the second capacitor and one end of the third capacitor and is connected with the first end of the first inductor through the second inductor, the cathode of the eighth diode is connected with the drain electrode of the second control tube and the first end of the secondary side of the first transformer, the second end of the secondary side of the first transformer is connected with the other end of the second capacitor and the source electrode of the first control tube, the drain electrode of the first control tube is connected with the other end of the third capacitor, the gate electrode of the second control tube is connected with the IO2 terminal of the first controller, and the gate electrode of the first control tube is connected with the state judgment module.
5. The integrated control system for power system protection and automation according to claim 4, wherein, The circuit breaker control module comprises a first diode, a second diode, a first power tube, a third diode, a fourth diode, a first resistor, a first capacitor and a second voltage-dependent resistor; The anode of the first diode is connected with the cathode of the third diode, one end of the second voltage-dependent resistor and the protection control module and is connected with the other end of the second voltage-dependent resistor, the cathode of the fourth diode, the anode of the second diode and the second end of the primary side of the first transformer in sequence through the first resistor and the first capacitor, the cathode of the first diode is connected with the cathode of the second diode and the collector electrode of the first power tube, the emitter electrode of the first power tube is connected with the anode of the third diode and the anode of the fourth diode, and the gate electrode of the first power tube is connected with the IO1 terminal of the first controller.
6. The integrated control system for power system protection and automation according to claim 5, wherein, The state judgment module comprises a self-locking device, a first inverter, a first logic device, a fifth diode and a second logic device; The input end of the self-locking device is connected with the input end of the first inverter and the IO1 terminal of the first controller, the output end of the self-locking device is connected with the A terminal of the first logic device, the output end of the first inverter is connected with the B terminal of the first logic device and the cathode of the fifth diode, the anode of the fifth diode is connected with the Y terminal of the first logic device and the B terminal of the second logic device, the A terminal of the second logic device is connected with the third end of the signal processing device, and the Y terminal of the second logic device is connected with the gate electrode of the first control tube, the IO6 terminal of the first controller and the protection control module.
7. The integrated control system for power system protection and automation according to claim 6, wherein, The protection control module comprises a second power tube, a seventh diode, a third resistor, a first switch tube, a second resistor, a third power tube and a sixth diode; The collector of the second power transistor is connected to the first end of the power distribution port, the emitter of the second power transistor is connected to the anode of the seventh diode, the cathode of the seventh diode is connected to the cathode of the sixth diode and the anode of the first diode, the collector of the third power transistor is connected to the static end of the second relay switch and the gate of the third power transistor and the collector of the first switch transistor through the second resistor, the emitter of the first switch transistor is grounded, the base of the first switch transistor is connected to the gate of the second power transistor and the Y terminal of the second logic device through the third resistor, and the emitter of the third power transistor is connected to the anode of the sixth diode.