CN117318302A - Distributed comprehensive protection device suitable for power distribution device and misoperation prevention method - Google Patents

Distributed comprehensive protection device suitable for power distribution device and misoperation prevention method Download PDF

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Publication number
CN117318302A
CN117318302A CN202311285573.9A CN202311285573A CN117318302A CN 117318302 A CN117318302 A CN 117318302A CN 202311285573 A CN202311285573 A CN 202311285573A CN 117318302 A CN117318302 A CN 117318302A
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CN
China
Prior art keywords
control board
loop
sub
circuit
handcart
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311285573.9A
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Chinese (zh)
Inventor
苑令华
相龙阳
屈浩
张传亮
阮伟唯
马洲
冯鑫禹
张南南
罗明
周明伟
边茂洲
吴欣欣
吴超
肖怀彬
徐洲
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Yanzhou Dongfang Electromachanical Co ltd
Original Assignee
Yanzhou Dongfang Electromachanical Co ltd
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Publication date
Application filed by Yanzhou Dongfang Electromachanical Co ltd filed Critical Yanzhou Dongfang Electromachanical Co ltd
Priority to CN202311285573.9A priority Critical patent/CN117318302A/en
Publication of CN117318302A publication Critical patent/CN117318302A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
    • H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention relates to a distributed comprehensive protection device suitable for a power distribution device and an anti-misoperation method, and belongs to the technical field of production of mining combined type vacuum power distribution devices. The system comprises a plurality of groups of unit sub-control boards, a main control board and a display screen, wherein the plurality of groups of unit sub-control boards and the same main control board are in bus communication mode for data interaction, and MODBUS protocol communication is adopted between the main control board and the display screen. The device is applied to a combined vacuum power distribution device, and realizes data interaction and information processing among units; the intelligent misoperation prevention control of power interruption and maintenance by one key is realized, and the illegal operation and the interference between devices are effectively prevented. Meanwhile, a communication mode is adopted to replace hard wiring, so that the assembly and maintenance efficiency is improved. Has the advantages of high intelligent degree, convenient maintenance and the like.

Description

Distributed comprehensive protection device suitable for power distribution device and misoperation prevention method
Technical Field
The invention relates to a distributed comprehensive protection device suitable for a power distribution device and an anti-misoperation method, and belongs to the technical field of design of mining combined type vacuum power distribution devices.
Background
The single-loop high-voltage vacuum power distribution device is the most important power supply equipment for the coal mine, and with the continuous development and progress of technology, the mining combined type vacuum power distribution device is widely applied to the mine at present due to the excellent performance and characteristics of the mining combined type vacuum power distribution device, and gradually replaces the single-loop high-voltage vacuum power distribution device. At present, the mining combined type vacuum power distribution device has the following problems:
1. all signals of each unit cavity are connected with the main control room by hard wires, so that the number of cables is large, and the on-site overhaul workload is large.
2. Each unit is provided with a mining comprehensive protection device, information cannot be interacted, the mining comprehensive protection device becomes an information island, and the advantages of the combined control system cannot be effectively exerted.
3. The electric handcart and the grounding knife are controlled independently, the intelligent degree is low, misoperation risks exist, and system fault shutdown is caused.
Disclosure of Invention
In order to solve one of the above problems, according to the above shortcomings in the prior art, the present invention aims to solve the technical problems: a distributed comprehensive protection device suitable for a power distribution device and an anti-misoperation method are provided.
The invention discloses a distributed comprehensive protection device suitable for a power distribution device, which comprises a plurality of groups of unit component control boards, a main control board and a display screen, and is characterized in that: the system comprises a plurality of groups of unit sub-control boards and a same main control board, wherein the unit sub-control boards are in bus communication mode to interact data, MODBUS protocol communication is adopted between the main control boards and a display screen, each unit sub-control board comprises a voltage conditioning circuit, a current conditioning circuit, a handcart control circuit, a handcart protection circuit, a grounding knife control circuit, a grounding knife protection circuit, a sub-control board digital quantity input circuit, a sub-control board digital quantity output circuit, a sub-control board communication interface and a sub-control board CPU control circuit, and the sub-control board CPU control circuit is connected with the voltage conditioning circuit, the current conditioning circuit, the handcart control circuit, the handcart protection circuit, the grounding knife control circuit, the grounding knife protection circuit, the sub-control board digital quantity input circuit, the sub-control board digital quantity output circuit and the sub-control board communication interface.
Preferably, the voltage conditioning loop is used for three-phase voltage and zero sequence voltage acquisition. The primary side voltage is converted into secondary voltage through a voltage transformer and then is connected to a circuit board voltage acquisition terminal, the secondary side voltage is processed through a voltage conversion circuit and a voltage conditioning circuit and then is transmitted to an AD conversion chip, and the AD conversion chip converts an analog quantity signal into a digital quantity signal and then transmits the digital quantity signal to a CPU control loop of the sub-control board through an SPI interface.
Preferably, the current conditioning loop is used for three-phase current and zero sequence current collection. The primary side current is converted into secondary current through a current transformer and then is connected to a circuit board current acquisition terminal, the secondary side current is processed through a current conversion circuit and a current conditioning circuit and then is transmitted to an AD conversion chip, and the AD conversion chip converts an analog quantity signal into a digital quantity signal and transmits the digital quantity signal to a CPU control loop of the sub-control board through an SPI interface.
Preferably, the handcart control loop is connected with a handcart motor and used for controlling the handcart motor. When the control loop of the sub-control board CPU receives the command of the handcart to the working position, the control loop of the sub-control board CPU controls the forward relay to act, so that the forward rotation of the handcart motor is realized, and the hand-operated handcart is rocked into the working position. When the control loop of the sub-control board CPU receives the instruction of the handcart reaching the test position, the control loop of the sub-control board CPU controls the reverse relay to act, so that the motor of the handcart is reversed, and the handcart is rocked into the working position.
Preferably, the handcart protection circuit is connected with a handcart motor and is used for detecting working current and state of the handcart when the handcart is rocked in and out. The handcart state acquisition circuit comprises a current transformer integrated in a handcart working power circuit and a handcart state acquisition circuit. The analog quantity collected by the current transformer is directly connected into the CPU control loop of the sub-control board, when the handcart works, the CPU control loop of the sub-control board can judge the current in real time, and when the current is larger than a set value, the CPU control loop of the sub-control board sends a stop instruction, the handcart stops shaking in and shaking out actions, and fault information is sent to the main control board. And the handcart state acquisition loop can acquire the position of the handcart in real time, when a shaking-in or shaking-out instruction is sent, the handcart does not reach the designated position within the set time, the handcart stops outputting, and the overtime fault is sent to the main control board.
Preferably, the grounding knife control loop is connected with the grounding knife motor and used for controlling the grounding knife motor. When the control loop of the control board CPU receives a grounding knife closing instruction, the control loop of the control board CPU controls the forward relay to act, so that the grounding knife motor rotates forward, and the grounding knife is closed. When the control loop of the control board CPU receives the switch-off instruction of the grounding switch, the control loop of the control board CPU controls the reverse relay to act, so that the switch-off of the grounding switch is realized.
Preferably, the grounding knife protection loop is connected with a grounding knife motor, and detects working current and state of the grounding knife during opening and closing. The grounding knife state acquisition circuit comprises a current transformer and a grounding knife state acquisition circuit, wherein the current transformer and the grounding knife state acquisition circuit are integrated in a grounding knife working power supply circuit. The analog quantity collected by the current transformer is directly connected into a sub-control board CPU control loop, when the grounding knife works, the sub-control board CPU control loop can judge the current in real time, and when the current is larger than a set value, the sub-control board CPU control loop sends a stop instruction, the grounding knife stops acting, and fault information is sent to the main control board. And the grounding knife state acquisition loop can acquire the position of the grounding knife in real time, when the switching-on/switching-off instruction is sent, the grounding knife does not reach the designated position within the set time, the grounding knife stops outputting, and the overtime fault is sent to the main control board.
Preferably, the digital quantity input loop of the separation control board mainly comprises separation gate input, closing input, reset input, overhaul input, gas locking, wind power locking, switch position, handcart position and grounding knife position information acquisition. The digital input signal is connected to the optical coupler isolation input side, the optical coupler output side is connected to the sub-control board CPU control loop, and the sub-control board CPU control loop can judge the corresponding action of the input signal according to the detected deflection information.
Preferably, the digital quantity output loop of the separation control board is used for controlling the separation and closing operation, the handcart operation and the grounding knife operation of the circuit breaker and mainly comprises a closing output, a separation output, a handcart control output and a grounding knife control output. For example, when the switching-on command is received by the switching-on control board, the CPU control loop of the switching-on control board controls the switching-on relay to act, and the secondary side of the switching-on relay controls the switching-on coil, so that the switching-on of the circuit breaker is realized.
Preferably, the sub-control board communication interface is used for communication between a sub-control board CPU control loop of the unit sub-control board and the main control board, the unit sub-control board transmits relevant analog quantity information and state information of the unit to the main control board, and the main control board sends relevant control instructions to the sub-control board through the communication interface.
Preferably, the control loop of the CPU of the sub-control board adopts an ARM single-chip microcomputer, and is used for calculating, analyzing and storing waveform data of the acquired voltage signals and current signals, generating control instructions of the handcart and the grounding knife, controlling the opening and closing actions and the like. Firstly, judging whether the acquired analog quantity meets the protection action condition according to an algorithm, and when the acquired analog quantity meets the protection action, sending a tripping instruction by the sub-control board to control a tripping loop of the circuit breaker to realize tripping so as to protect the switch. And secondly, controlling the handcart to swing in and out according to the instruction information, and judging whether faults exist in real time. And thirdly, controlling the opening and closing of the grounding knife, and judging whether a fault exists in real time. Fourth, the control switch is remotely controlled/switched on in situ. Fifthly, switch action information, operation information, fault information and waveform data are recorded.
Preferably, the unit sub-control board further comprises a power supply loop, and the output end of the power supply loop is connected with a power interface of the CPU control loop of the sub-control board.
Preferably, the power supply loop converts the AC100V input power to DC24V, DC V, dc3.3v power supply voltages used by the various functional loops of the circuit board. The power supply loop provides stable and reliable working power supply for the whole unit sub-control board.
Preferably, the display screen is a touch screen. Preferably, the main control board comprises a communication interface A, a communication interface B, a communication interface C, a communication interface D, a main control board digital quantity output loop, a main control board digital quantity input loop and a main control board CPU control loop, wherein the main control board CPU control loop is connected with the communication interface A, the communication interface B, the communication interface C, the communication interface D, the main control board digital quantity output loop and the main control board digital quantity input loop.
Preferably, the communication interface a is a bus communication for communicating with the unit sub-control board.
The communication interface B and the communication interface C are communication interfaces of the master control board to the upper computer and are used for uploading device information to the upper computer monitoring system and receiving control instructions issued by the monitoring system.
Preferably, the communication interface D is upwards connected with the display screen and downwards connected with the CPU control loop of the main control board, so that data interaction between the display screen and the comprehensive protection device is realized. The display screen displays voltage and current data, opening amount information, fault information, protection fixed value and pressing plate information of each unit.
Preferably, the main control board digital quantity output loop is used for outputting state information of each unit. The relay function can be customized according to the actual requirements of the site. For example, the 1 st relay can be defined as the closing information of the 1 st circuit breaker, and when the 1 st circuit breaker is at the closing position, the main control board CPU receives the information of the 1 st circuit breaking control board and controls the 1 st circuit relay to be closed.
Preferably, the main control board digital quantity input loop is used for realizing maintenance locking setting of each unit.
An anti-misoperation method suitable for a power distribution device is characterized by comprising the following steps:
step 1, configuring parameters of each unit;
step 2, building an information model by a unit loop;
step 3, constructing a master control unit information model;
step 4, executing each loop according to the system sequence;
and 5, detecting the running state and processing the fault mechanism.
The step 1 is specifically that a bus section where equipment is located, a loop position where the equipment is located and a loop function are determined according to a primary system diagram of the system combined type power distribution device, and relevant configuration parameters are configured to corresponding loop sub-control boards.
The step 2 is to collect the running state information of the loop, combine the parameters of the step 1, generate the information model of the unit and send the information to the bus.
The step 3 is that the main control unit receives the information of each loop, combines the control instruction to generate the information model of the main control unit, and sends the established information to the bus.
And step 4, after the main control unit sends the control instruction, each unit receives the main control instruction and the information autonomous processing information to form the loop instruction, so that each single loop of the system is sequentially executed, the occurrence of misoperation faults is prevented, and the system safety is improved. Meanwhile, each loop updates the loop information model in real time and sends the loop information model to the bus.
Step 5 is specifically that the main control unit receives the operation information of each loop in real time in the process that each loop sequentially executes the instructions. Firstly, judging the instruction execution state and displaying in real time; and secondly, judging whether a fault occurs during the execution of the instruction, and when the fault is detected, taking over the instruction by a next priority loop according to a preset fault processing scheme and automatically processing according to the fault processing scheme. Meanwhile, the main control unit can give an alarm, update the instruction and issue according to the fault processing scheme, and avoid the expansion of system faults caused by local faults.
Compared with the prior art, the invention has the following beneficial effects:
the distributed comprehensive protection device and the misoperation prevention method suitable for the power distribution device are applied to a combined type vacuum power distribution device, and realize data interaction and information processing among units; the intelligent misoperation prevention control of power interruption and maintenance by one key is realized, and the illegal operation and the interference between devices are effectively prevented. Meanwhile, a communication mode is adopted to replace hard wiring, so that the assembly and maintenance efficiency is improved. Has the advantages of high intelligent degree, convenient maintenance and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a system block diagram of a distributed integrated protection device for a power distribution device according to the present invention;
FIG. 2 is a schematic diagram of a unit sub-control panel of the present invention;
FIG. 3 is a schematic diagram of a main control board;
FIG. 4 is a flow chart of intelligent anti-misoperation;
fig. 5 is a flowchart of a sub-control board one-key control procedure.
In the figure: 1. the device comprises a unit sub-control board 1.1, a power supply loop 1.2, a voltage conditioning loop 1.3, a current conditioning loop 1.4, a handcart control loop 1.5, a handcart protection loop 1.6, a grounding knife control loop 1.7, a grounding knife protection loop 1.8, a sub-control board digital quantity input loop 1.9, a sub-control board digital quantity output loop 1.10, a sub-control board communication interface 1.11, a sub-control board CPU control loop 2, a main control board 2.1, a communication interface A2.2, a communication interface B2.3, a communication interface C2.4, a communication interface D2.5, a main control board digital quantity output loop 2.6, a main control board digital quantity input loop 2.7, a main control board CPU control loop 3, a display screen 4 and a main power supply.
Detailed Description
The invention is further described below with reference to the accompanying drawings: the present invention is further illustrated by the following examples, which are not intended to be limiting, but any modifications, equivalents, improvements, etc. within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
In embodiment 1, as shown in fig. 1-3, the distributed comprehensive protection device suitable for a power distribution device comprises a plurality of groups of unit sub-control boards 1, a main control board 2 and a display screen 3, wherein the plurality of groups of unit sub-control boards 1 and the same main control board 2 adopt a bus communication mode to exchange data, the main control board 2 and the display screen 3 adopt a MODBUS protocol to communicate, a main power supply 4 supplies power to the main control board 2 and the display screen 3, the unit sub-control boards 1 comprise a voltage conditioning circuit 1.2, a current conditioning circuit 1.3, a handcart control circuit 1.4, a handcart protection circuit 1.5, a grounding knife control circuit 1.6, a grounding knife protection circuit 1.7, a sub-control board digital quantity input circuit 1.8, a sub-control board digital quantity output circuit 1.9, a sub-control board communication interface 1.10 and a sub-control board CPU control circuit 1.11, and the sub-control board CPU control circuit 1.11 are connected with the voltage conditioning circuit 1.2, the current conditioning circuit 1.3, the handcart control circuit 1.4, the handcart protection circuit 1.5, the grounding knife protection circuit 1.6, the grounding knife protection circuit 1.7, the sub-control board digital quantity input circuit 1.8, and the digital quantity input circuit 1.8.
In embodiment 2, as shown in fig. 1-3, the distributed comprehensive protection device suitable for a power distribution device comprises a plurality of groups of unit sub-control boards 1, a main control board 2 and a display screen 3, wherein the plurality of groups of unit sub-control boards 1 and the same main control board 2 adopt a bus communication mode to exchange data, the main control board 2 and the display screen 3 adopt a MODBUS protocol to communicate, a main power supply 4 supplies power to the main control board 2 and the display screen 3, the unit sub-control boards 1 comprise a voltage conditioning circuit 1.2, a current conditioning circuit 1.3, a handcart control circuit 1.4, a handcart protection circuit 1.5, a grounding knife control circuit 1.6, a grounding knife protection circuit 1.7, a sub-control board digital quantity input circuit 1.8, a sub-control board digital quantity output circuit 1.9, a sub-control board communication interface 1.10 and a sub-control board CPU control circuit 1.11, and the sub-control board CPU control circuit 1.11 are connected with the voltage conditioning circuit 1.2, the current conditioning circuit 1.3, the handcart control circuit 1.4, the handcart protection circuit 1.5, the grounding knife protection circuit 1.6, the grounding knife protection circuit 1.7, the sub-control board digital quantity input circuit 1.8, and the digital quantity input circuit 1.8.
Further, the voltage conditioning circuit 1.2 is used for three-phase voltage and zero sequence voltage acquisition. The primary side voltage is converted into secondary voltage through a voltage transformer and then is connected to a circuit board voltage acquisition terminal, the secondary side voltage is processed through a voltage conversion circuit and a voltage conditioning circuit and then is transmitted to an AD conversion chip, and the AD conversion chip converts an analog quantity signal into a digital quantity signal and then transmits the digital quantity signal to a CPU control loop 1.11 of the sub-control board through an SPI interface.
Further, the current conditioning loop 1.3 is used for three-phase current and zero sequence current collection. The primary side current is converted into secondary current through a current transformer and then is connected to a circuit board current acquisition terminal, the secondary side current is processed through a current conversion circuit and a current conditioning circuit and then is transmitted to an AD conversion chip, and the AD conversion chip converts an analog quantity signal into a digital quantity signal and transmits the digital quantity signal to a sub-control board CPU control loop 1.11 through an SPI interface.
Further, the handcart control loop 1.4 is connected with a handcart motor and is used for controlling the handcart motor. When the control loop 1.11 of the sub-control board CPU receives the instruction of the handcart to the working position, the control loop 1.11 of the sub-control board CPU controls the forward relay to act, so that the forward rotation of the handcart motor is realized, and the handcart is rocked into the working position. When the sub-control board CPU control loop 1.11 receives a handcart to test position instruction, the sub-control board CPU control loop 1.11 controls the reverse relay to act, so that the motor of the handcart is reversed, and the handcart is rocked into a working position.
Further, the handcart protection circuit 1.5 is connected with a handcart motor and is used for detecting working current and state when the handcart is rocked in and out. The handcart state acquisition circuit comprises a current transformer integrated in a handcart working power circuit and a handcart state acquisition circuit. The analog quantity collected by the current transformer is directly connected into the sub-control board CPU control loop 1.11, when the handcart works, the sub-control board CPU control loop 1.11 can judge the current in real time, when the current is larger than a set value, the sub-control board CPU control loop 1.11 sends out a stop instruction, the handcart stops shaking-in and shaking-out actions, and fault information is sent to the main control board 2. And the handcart state acquisition loop can acquire the position of the handcart in real time, when a shaking-in or shaking-out instruction is sent, the handcart does not reach the designated position within the set time, the handcart stops outputting, and the overtime fault is sent to the main control board 2.
Further, the earthing knife control loop 1.6 is connected with the earthing knife motor and used for controlling the earthing knife motor. When the control loop 1.11 of the control board CPU receives a grounding knife closing instruction, the control loop 1.11 of the control board CPU controls the forward relay to act, so that the grounding knife motor rotates forward, and the grounding knife is closed. When the control loop 1.11 of the control board CPU receives the switch-off instruction of the grounding switch, the control loop 1.11 of the control board CPU controls the reverse relay to act, so that the switch-off of the grounding switch is realized.
Further, the grounding knife protection loop 1.7 is connected with a grounding knife motor, and working current and state of the grounding knife during opening and closing are detected. The grounding knife state acquisition circuit comprises a current transformer and a grounding knife state acquisition circuit, wherein the current transformer and the grounding knife state acquisition circuit are integrated in a grounding knife working power supply circuit. The analog quantity collected by the current transformer is directly connected into the sub-control board CPU control loop 1.11, when the grounding knife works, the sub-control board CPU control loop 1.11 can judge the current in real time, and when the current is larger than a set value, the sub-control board CPU control loop 1.11 sends out a stop instruction, the grounding knife stops acting, and fault information is sent to the main control board 2. And the grounding knife state acquisition loop can acquire the position of the grounding knife in real time, when the switching-on and switching-off instruction is sent, the grounding knife does not reach the designated position within the set time, the grounding knife stops outputting, and the overtime fault is sent to the main control board 2.
Further, the digital quantity input loop 1.8 of the sub-control board mainly comprises a switching-off input, a switching-on input, a resetting input, a maintenance input, a gas locking, a wind power locking, a switching position, a handcart position and a grounding knife position information acquisition. The digital input signal is connected to the optocoupler isolation input side, the optocoupler output side is connected to the sub-control board CPU control loop 1.11, the input signal can be connected to the sub-control board CPU control loop 1.11 after isolation treatment, and the sub-control board CPU control loop 1.11 judges the corresponding action of the input signal according to the detected deflection information.
Further, the digital quantity output loop 1.9 of the sub-control board is used for controlling the switching-on and switching-off operation, the handcart operation and the grounding knife operation of the circuit breaker and mainly comprises switching-on output, switching-off output, handcart control output and grounding knife control output. For example, when the switching-on command is received by the switching-on control board, the switching-on control board CPU control loop 1.11 controls the action of the switching-on relay, and the secondary side of the switching-on relay controls the switching-on coil, so that the switching-on of the circuit breaker is realized.
Further, the sub-control board communication interface 1.10 is used for communication between the sub-control board CPU control loop 1.11 of the unit sub-control board 1 and the main control board 2, the unit sub-control board 1 transmits relevant analog quantity information and status information of the unit to the main control board 2, and the main control board sends relevant control instructions to the sub-control board through the communication interface.
Further, the control loop 1.11 of the control board CPU adopts an ARM single-chip microcomputer, and is used for calculating, analyzing and storing waveform data of the acquired voltage signals and current signals, generating control instructions of a handcart and a grounding knife, controlling opening and closing actions and the like. Firstly, judging whether the acquired analog quantity meets the protection action condition according to an algorithm, and when the acquired analog quantity meets the protection action, sending a tripping instruction by the sub-control board to control a tripping loop of the circuit breaker to realize tripping so as to protect the switch. And secondly, controlling the handcart to swing in and out according to the instruction information, and judging whether faults exist in real time. And thirdly, controlling the opening and closing of the grounding knife, and judging whether a fault exists in real time. Fourth, the control switch is remotely controlled/switched on in situ. Fifthly, switch action information, operation information, fault information and waveform data are recorded.
Further, the unit sub-control board 1 further comprises a power supply loop 1.1, and the output end of the power supply loop 1.1 is connected with a power interface of the sub-control board CPU control loop 1.11.
Further, the power circuit 1.1 converts the AC100V input power to DC24V, DC V and DC3.3V power voltages used by the functional circuits of the circuit board. The power supply loop provides stable and reliable working power for the whole unit sub-control board 1.
Further, the display screen 3 is a touch screen. Further, the main control board 2 includes a communication interface a2.1, a communication interface B2.2, a communication interface C2.3, a communication interface D2.4, a main control board digital output loop 2.5, a main control board digital input loop 2.6, and a main control board CPU control loop 2.7, where the main control board CPU control loop 2.7 is connected with the communication interface a2.1, the communication interface B2.2, the communication interface C2.3, the communication interface D2.4, the main control board digital output loop 2.5, and the main control board digital input loop 2.6.
Further, the communication interface a2.1 is a bus communication, and is used for communicating with the unit sub-control board 1.
The communication interface B2.2 and the communication interface C2.3 are communication interfaces of the master control board to the upper computer, and are used for uploading device information to the upper computer monitoring system and receiving control instructions issued by the monitoring system.
Further, the communication interface D2.4 is upwards connected with the display screen 3 and downwards connected with the control loop 2.7 of the CPU of the main control board, so that data interaction between the display screen and the comprehensive protection device is realized. The display screen displays voltage and current data, opening amount information, fault information, protection fixed value and pressing plate information of each unit.
Further, the main control board digital quantity output loop 2.5 is used for outputting state information of each unit. The relay function can be customized according to the actual requirements of the site. For example, the 1 st relay can be defined as the closing information of the 1 st circuit breaker, and when the 1 st circuit breaker is at the closing position, the main control board CPU receives the information of the 1 st circuit breaking control board and controls the 1 st circuit relay to be closed.
Further, the main control board digital quantity input loop 2.6 is used for realizing the overhaul locking setting of each unit.
In embodiment 3, referring to fig. 4, in addition to designing the control system for realizing one-key intelligent misoperation prevention, an intelligent misoperation prevention control method is provided, which is characterized in that the idea of decomposing a total control instruction into single steps and implementing the single steps according to priorities is applied to the combined type power distribution device power outage and overhaul operation control, and the method comprises the following steps:
step 1: determining a bus section where equipment is located, a loop position where the equipment is located and a loop function according to a primary system diagram of the system combined type power distribution device, and configuring relevant configuration parameters to corresponding loop sub-control boards;
step 2: and (3) collecting the running state information of the loop, generating an information model of the unit by combining the parameters of the step (1), and sending the established information to a bus.
1 of the formula
S1: the bus section information and the loop information are contained;
s2: including functional information of the loop, such as incoming line, feed-out and communication;
s3: the circuit breaker comprises the position information of the circuit breaker, a grounding knife and a handcart, and forms four states of operation, hot standby, cold standby, overhaul and locking; and (5) operation data.
S4: including the present loop control mode (in-situ control, remote control);
s5: including the present loop fault information.
Step 3: the main control unit receives the information of each loop, generates a main control unit information model by combining the control instructions, and sends the established information to the bus.
2 of the formula
Note that: snx: representing the nth loop. The following are provided:
s11: first loop bus section information and loop information;
s12: first loop function information, such as incoming, outgoing, and connected;
s13: a first loop operating state;
s14: a first loop control mode (in-situ control, remote control);
s15: first loop fault information;
s16: the total control instruction, such as a section of bus overhaul locking instruction, is executed in turn according to the instruction in a loop of a section of bus;
s17: control commands for the first loop, such as the first unit, give the latch command.
S18: the first loop action priority can only carry out the loop operation after the loop with high priority executes the instruction.
Step 4: after the main control unit sends the control instruction, each unit receives the main control instruction and the information autonomous processing information to form the loop instruction, so that each single loop of the system is sequentially executed, misoperation faults are prevented, and system safety is improved. Meanwhile, each loop updates the loop information model in real time and sends the loop information model to the bus.
Step 5: and in the process of sequentially executing the instructions by each loop, the main control unit receives the running information of each loop in real time. Firstly, judging the instruction execution state and displaying in real time; and secondly, judging whether a fault occurs during the execution of the instruction, and when the fault is detected, taking over the instruction by a next priority loop according to a preset fault processing scheme and automatically processing according to the fault processing scheme. Meanwhile, the main control unit can give an alarm, update the instruction and issue according to the fault processing scheme, and avoid the expansion of system faults caused by local faults.
Referring to fig. 5, the one-touch logic control procedure of the sub-control board comprises the following steps:
step 1: determining a bus section where equipment is located, a loop position where the equipment is located and a loop function according to a primary system diagram of the system combined type power distribution device, and configuring relevant configuration parameters to corresponding loop sub-control boards;
step 2: and (3) collecting the running state information of the loop, generating an information model of the unit by combining the parameters of the step (1), and sending the established information to a bus.
1 of the formula
Step 3: the main control unit receives the information of each loop, generates a main control unit information model by combining the control instructions, and sends the established information to the bus.
2 of the formula
Step 4: the loop unit sub-control board receives the bus data and analyzes the received information. After parsing, each cell gets n sets of data. Namely:
-3
......
After further analysis, the instruction issued by the main control unit to the unit is obtained. The control method comprises the steps of total control instruction, loop control priority and the like.
Step 5: and determining the next operation of the loop by the loop sub-control board according to the instruction and the priority.
Step 6: and receiving the operation information of each loop in real time, and executing instructions by each unit according to a preset fault processing scheme when the system fails. When the unit executes the instruction, the unit sub-control board respectively controls the breaker, the grounding knife and the handcart to operate to a specified state in sequence. The unit has faults in the process of executing the instruction, stops executing the action according to a fault processing scheme, generates a unit information model and sends fault information and unit state information to a bus.
Further description: the one-key misoperation prevention control logic has a state in 4: running, hot standby, cold standby and locking. The handcart, the circuit breaker and the grounding knife act according to control logic. For example: and in the running state, a locking instruction is given, the circuit breaker firstly acts to a breaking position, then the handcart runs to a test position, and finally the grounding knife reaches a closing position and enters a locking state.
Bus communication step:
step 1: the unit generates a transmission information message according to the unit information model formula and sends the unit information to the bus.
Step 2: the unit receives data on the bus.
Step 3: the unit parses the received information.
Step 4: repeating the steps 1 to 3.
3) The main control unit receives the information of each loop. Firstly, a master control unit information model is generated according to a formula-2, and the established information is sent to a bus. And secondly, the received data are communicated outwards according to MODBUS, IEC103 and other communication protocols.
2 of the formula
Note that: snx: representing the nth loop.
4) After the main control unit sends the control instruction, each unit receives the main control instruction and the information autonomous processing information to form the loop instruction, so that each single loop of the system is sequentially executed, misoperation faults are prevented, and system safety is improved. Meanwhile, each loop updates the loop information model in real time and sends the loop information model to the bus.
5) And in the process of sequentially executing the instructions by each loop, the main control unit receives the running information of each loop in real time. Firstly, judging the instruction execution state and displaying in real time; and secondly, judging whether a fault occurs during the execution of the instruction, and when the fault is detected, taking over the instruction by a next priority loop according to a preset fault processing scheme and automatically processing according to the fault processing scheme. Meanwhile, the main control unit can give an alarm, update the instruction and issue according to the fault processing scheme, and avoid the expansion of system faults caused by local faults.
Taking the 1 st unit as an I section bus incoming line, and the 2,3,4 and 5 units as a feed-out cabinet under the 1 st unit as an example. If the main control unit receives the whole-section locking instruction of the section I bus at this time, the following control logic is executed in sequence:
the main control board generates control instructions according to the information model of the formula-2, wherein the instructions are 1 to 5 units and all run to a locking state, and the priority order is 5-4-3-2-1. The command is sent to the communication bus.
The 1 to 5 units receive the bus data and complete the data parsing according to equation-3.
The 5 units have the highest priority, execute instructions with priority, and 1 to 4 units are in the standby state. The circuit breaker is firstly operated to a switching-off position, then the handcart is operated to a test position, and finally the grounding knife is grounded to a switching-on position and enters a locking state.
And 5, after the unit instruction is completed, sending relevant state information to the bus. The 4 unit collects the 5 unit instruction completion state and starts to execute to the locking state according to the corresponding logic.
The subsequent execution to the lockout state is performed sequentially in the order of 3-2-1.
And after all the 1-5 units execute the action correctly according to the logic instruction, the main control unit prompts that the action is completed.
And (3) fault treatment: in the process of executing the instruction, a certain unit breaks down, the unit interrupts the executed instruction, related fault information is sent to a bus, the unit at the later stage continues to execute the instruction of the unit, the unit 1 is a wire inlet unit, and the unit 1 executes the instruction after the fault is relieved. Simultaneously, the main control unit can send alarm information.
The invention has the beneficial effects that:
the basic protection function of each loop is lowered to each unit for processing, the advanced functions (such as communication and override trip prevention) of the system are concentrated in the main control board, the unified information fusion processing and the external opening are realized, the equipment is truly integrated, and the problem that the loops of the existing equipment are operated in an 'island mode' is solved.
The loop and the main control adopt bus communication, firstly, data sharing among systems is realized; secondly, solve the problem that the existing equipment loop has many connecting cables with the main control room, the on-site maintenance is inconvenient to check the line, has improved the convenience of equipment assembly efficiency and on-site inspection.
The method can realize data sharing among units and orderly execution of the units according to instructions and priority orders to a set state, effectively prevent system faults caused by misoperation, avoid mutual influence among devices and improve the reliability and stability of the combined power distribution device.
The real-time data sharing, each unit and the main control unit can monitor the running state of the system in real time, and when faults occur, the system can timely process the faults according to a fault processing mechanism at the first time, so that the running safety of the combined type power distribution device is improved.
The foregoing has shown and described the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
The present invention is not described in detail in the present application, and is well known to those skilled in the art.

Claims (8)

1. The utility model provides a protection device is synthesized to distributing device's distributing type, includes multiunit unit control board (1), main control board (2) and display screen (3), its characterized in that: the system comprises a plurality of groups of unit sub-control boards (1) and a same main control board (2), wherein data are interacted in a bus communication mode, a MODBUS protocol is adopted between the main control board (2) and a display screen (3), the unit sub-control boards (1) comprise a voltage conditioning circuit (1.2), a current conditioning circuit (1.3), a handcart control circuit (1.4), a handcart protection circuit (1.5), a grounding knife control circuit (1.6), a grounding knife protection circuit (1.7), a sub-control board digital quantity input circuit (1.8), a sub-control board digital quantity output circuit (1.9), a sub-control board communication interface (1.10) and a sub-control board CPU control circuit (1.11), and the sub-control board CPU control circuit (1.11) is connected with the voltage conditioning circuit (1.2), the current conditioning circuit (1.3), the handcart control circuit (1.4), the handcart protection circuit (1.5), the grounding knife control circuit (1.6), the grounding knife control circuit (1.7), the sub-control board digital quantity input circuit (1.8) and the sub-control board digital quantity input circuit (1.8) are connected with the sub-control board digital quantity input circuit (1.8).
2. A distributed integrated protection device suitable for an electrical distribution device according to claim 1, characterized in that the voltage conditioning circuit (1.2) is used for three-phase voltage and zero sequence voltage acquisition; the current conditioning loop (1.3) is used for collecting three-phase current and zero sequence current; the handcart control loop (1.4) is connected with the handcart motor and is used for controlling the handcart motor; the handcart protection loop (1.5) is connected with a handcart motor and is used for detecting working current and state when the handcart is rocked in and out; the grounding knife control loop (1.6) is connected with the grounding knife motor and used for controlling the grounding knife motor; the grounding knife protection loop (1.7) is connected with the grounding knife motor and detects working current and state of the grounding knife during opening and closing; the digital quantity input loop (1.8) of the sub-control board mainly comprises a switching-off input, a switching-on input, a resetting input, an overhaul input, a gas lock, a wind power lock, a switch position, a handcart position and information acquisition of a grounding knife position; the digital quantity output loop (1.9) of the sub-control board is used for controlling the opening and closing operation, the handcart operation and the grounding knife operation of the circuit breaker; the sub-control board communication interface (1.10) is used for communication between a sub-control board CPU control loop (1.11) of the unit sub-control board (1) and the main control board (2); the control loop (1.11) of the CPU of the branch control board adopts an ARM single-chip microcomputer and is used for calculating, analyzing and storing waveform data of the acquired voltage signals and current signals to generate control instructions of the handcart and the grounding knife and control the opening and closing actions.
3. The distributed integrated protection device suitable for the power distribution device according to claim 1, wherein the unit sub-control board (1) further comprises a power supply loop (1.1), and an output end of the power supply loop (1.1) is connected with a power interface of the sub-control board CPU control loop (1.11).
4. A distributed integrated protection arrangement for an electrical distribution unit according to claim 3, characterized in that the power supply circuit (1.1) provides a stable and reliable working power supply for the entire unit sub-control panel (1).
5. A distributed integrated protection device suitable for an electrical distribution device according to claim 1, characterized in that the display screen (3) is a touch screen.
6. The distributed integrated protection device suitable for a power distribution device according to claim 1, wherein the main control board (2) comprises a communication interface a (2.1), a communication interface B (2.2), a communication interface C (2.3), a communication interface D (2.4), a main control board digital quantity output loop (2.5), a main control board digital quantity input loop (2.6) and a main control board CPU control loop (2.7), and the main control board CPU control loop (2.7) is connected with the communication interface a (2.1), the communication interface B (2.2), the communication interface C (2.3), the communication interface D (2.4), the main control board digital quantity output loop (2.5) and the main control board digital quantity input loop (2.6).
7. The distributed integrated protection device for a power distribution device according to claim 6, wherein the communication interface a (2.1) is a bus communication for communicating with the unit sub-control board (1); the communication interface B (2.2) and the communication interface C (2.3) are communication interfaces of the master control board to the upper computer and are used for uploading device information to the upper computer monitoring system and receiving control instructions issued by the monitoring system; the communication interface D (2.4) is upwards connected with the display screen (3) and downwards connected with the CPU control loop (2.7) of the main control board, so that data interaction between the display screen and the comprehensive protection device is realized; the main control board digital quantity output loop (2.5) is used for outputting state information of each unit; the main control board digital quantity input loop (2.6) is used for realizing maintenance locking setting of each unit.
8. An anti-misoperation method suitable for a power distribution device is characterized by comprising the following steps:
step 1, configuring parameters of each unit;
step 2, building an information model by a unit loop;
step 3, constructing a master control unit information model;
step 4, executing each loop according to the system sequence;
and 5, detecting the running state and processing the fault mechanism.
CN202311285573.9A 2023-10-07 2023-10-07 Distributed comprehensive protection device suitable for power distribution device and misoperation prevention method Pending CN117318302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311285573.9A CN117318302A (en) 2023-10-07 2023-10-07 Distributed comprehensive protection device suitable for power distribution device and misoperation prevention method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311285573.9A CN117318302A (en) 2023-10-07 2023-10-07 Distributed comprehensive protection device suitable for power distribution device and misoperation prevention method

Publications (1)

Publication Number Publication Date
CN117318302A true CN117318302A (en) 2023-12-29

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Country Status (1)

Country Link
CN (1) CN117318302A (en)

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