CN113937724A - Relay protection soft and hard clamp plate integrated online monitoring system - Google Patents

Relay protection soft and hard clamp plate integrated online monitoring system Download PDF

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Publication number
CN113937724A
CN113937724A CN202111081620.9A CN202111081620A CN113937724A CN 113937724 A CN113937724 A CN 113937724A CN 202111081620 A CN202111081620 A CN 202111081620A CN 113937724 A CN113937724 A CN 113937724A
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CN
China
Prior art keywords
pressing plate
relay protection
hard
state
soft
Prior art date
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Granted
Application number
CN202111081620.9A
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Chinese (zh)
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CN113937724B (en
Inventor
孙辉
谢民
汪伟
邵庆祝
高博
徐斌
汪玉
丁津津
俞斌
于洋
张骏
张峰
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Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
State Grid Anhui Electric Power Co Ltd
Original Assignee
Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
State Grid Anhui Electric Power Co Ltd
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Publication date
Application filed by Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd, State Grid Anhui Electric Power Co Ltd filed Critical Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
Priority to CN202210444535.2A priority Critical patent/CN114825256A/en
Priority to CN202210444796.4A priority patent/CN114977075A/en
Priority to CN202111081620.9A priority patent/CN113937724B/en
Publication of CN113937724A publication Critical patent/CN113937724A/en
Application granted granted Critical
Publication of CN113937724B publication Critical patent/CN113937724B/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
    • 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
    • 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
    • H02J13/00022—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 wireless data transmission
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Alarm Systems (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

The invention discloses a relay protection soft and hard pressure plate integrated online monitoring system which comprises a pressure plate position sensor, a data acquisition terminal and an online patrol intelligent early warning module, wherein the data acquisition terminal acquires the position of a breaker, the position of a soft pressure plate and the position of a disconnecting link in a relay protection device in a communication mode; the online patrol intelligent early warning module identifies a target state of the relay protection device through the operation state of primary equipment, compares the current operation state of the relay protection device with the target state of the relay protection device in real time, and gives an alarm if the current operation state of the relay protection device is inconsistent with the target state of the relay protection device; the invention has the advantages that: the method has the advantages of wide application range, lower construction cost, higher efficiency, higher practical effect and easier practical application.

Description

Relay protection soft and hard clamp plate integrated online monitoring system
Technical Field
The invention relates to the field of relay protection on-line monitoring, in particular to a relay protection software and hardware pressing plate integrated on-line monitoring system.
Background
With the expansion and development of the power grid scale, the informatization and intelligentization levels of equipment operation and maintenance work are greatly improved, but the method also faces the challenges of rapid growth of running equipment, increasingly complex alternating current and direct current mixing and limited personnel number growth. The current transformer substation protection pressing plate information management and application still adopt traditional artifical fortune to examine the mode, work such as pressing plate switching operation, the regular position check nature of clamp plate are examined, all need examine personnel through the fortune and arrive the transformer substation after just can develop work, and the degree of dependence to personnel is high.
Due to networking of loops such as signals and control in the intelligent substation, the functions of the soft pressing plates are greatly enhanced, the protection device is provided with a large number of soft pressing plates, and the outlet hard pressing plates are moved to an outdoor intelligent control cubicle. Protection function switching and switching are realized by switching on and off the soft pressing plate in a protection device and a background machine, protection physical outlet function switching is realized by switching on and off the hard pressing plate at an outlet of an outdoor intelligent control cubicle, the soft pressing plate is not directly switched on and off, and the position of the hard pressing plate at the outlet cannot be acquired on line, so that the soft pressing plate and the hard pressing plate of the protection device are easily lost, mistakenly switched and the like, primary equipment can be operated under wrong protection configuration or even under no protection configuration, the safety of the equipment and a power grid is seriously threatened, and the information and the state of the pressing plate are difficult to monitor, thereby becoming difficult points and pain points troubling field work development of mass operation and maintenance personnel.
The Chinese patent publication No. CN111416438A discloses a method and a system for monitoring and intelligently checking the state of a hard pressing plate at a transformer station end, and the method applied by the patent comprises the steps of obtaining protection constant value information in a protection constant value sheet of the transformer station; the method comprises the steps of communicating with a measurement and control system to acquire the running state of primary equipment of the transformer substation and identify the running mode of the transformer substation; acquiring the actual state of each hard pressing plate at the transformer substation end; determining theoretical states of the hard pressing plates according to the protection fixed value information and the operation mode of the transformer substation; comparing the actual state and the theoretical state of each hard pressing plate to determine the hard pressing plate with abnormal state; the system comprises an upper computer, a pattern recognition device and a pressing plate state acquisition device. This patent application can realize going on state check to hard clamp plate state and relay protection definite value list through intelligent check logic, to the timely early warning of abnormal state, promotes the hard clamp plate of transformer substation and puts in and move back the rate of accuracy comprehensively. However, the application of the patent only relates to that the hard pressing plates are used for information acquisition, only can cover the traditional transformer substation, is narrow in application range, needs data support of a plurality of systems during data acquisition, increases construction cost, is low in efficiency, determines theoretical states of the hard pressing plates according to protection constant value information and a transformer substation operation mode, is complex in identification and processing of primary equipment state operation, and is difficult to put into practical application.
Disclosure of Invention
The invention aims to solve the technical problems that the pressing plate online monitoring system in the prior art only can cover the traditional transformer substation, the application range is narrow, the construction cost is increased, the efficiency is lower, the identification processing of the primary equipment state operation is more complex, and the pressing plate online monitoring system is difficult to be put into practical application.
The invention solves the technical problems through the following technical means: a relay protection soft and hard pressing plate integrated online monitoring system comprises a pressing plate position sensor, a data acquisition terminal and an online patrol intelligent early warning module, wherein the data acquisition terminal acquires a breaker position, a soft pressing plate position and a disconnecting link position in a relay protection device in a communication mode, the data acquisition terminal acquires the hard pressing plate position through the pressing plate position sensor, and the online patrol intelligent early warning module receives information acquired by the data acquisition terminal in real time;
the online patrol intelligent early warning module reads a primary and secondary equipment state corresponding instantiation file, the primary and secondary equipment state corresponding instantiation file defines the corresponding breaker position and the corresponding disconnecting link position of primary equipment under different operation states, the soft pressing plate and hard pressing plate switching rule matrix under different operation states of different types of relay protection devices are defined, the corresponding relay protection operation states of the primary equipment under different operation states are defined, the online patrol intelligent early warning module identifies the current operation state of the primary equipment through the collected real-time data of the breaker and the disconnecting link, and identifies the current operation state of the relay protection device through the collected real-time data of the soft pressing plate and the hard pressing plate; and identifying the target state of the relay protection device through the running state of the primary equipment, comparing the current running state of the relay protection device with the target state of the relay protection device in real time, and giving an alarm if the running state is inconsistent with the target state.
The information collected by the invention covers the relay protection soft pressing plate and the relay protection hard pressing plate, the system can be used in all types of substations, the application range is wide, the hard pressing plate position is collected by adopting the pressing plate position sensor, the relay protection device information is collected in a communication access mode, data support of a plurality of systems is not needed, the construction cost is lower, the efficiency is higher, the identification processing of primary equipment state operation is simplified, the incidence relation of primary equipment operation state and secondary equipment operation state is automatically generated by adopting a basic operation rule, the current operation state and the target state of the relay protection device are obtained according to the incidence relation and compared, the practical effect is higher, and the relay protection device can be more easily put into practical application.
Further, the relay protection soft and hard pressing plate integrated online monitoring system further comprises a configuration tool, wherein the configuration tool is used for constructing a total station primary and secondary equipment model and defining corresponding breaker positions and disconnecting link positions under different operation states of primary equipment, soft pressing plate and hard pressing plate switching rule matrixes under different operation states of different types of relay protection devices and corresponding relay protection operation states under different operation states of the primary equipment to generate a primary and secondary equipment state corresponding instantiation file.
Furthermore, a relay protection soft or hard clamp plate integration on-line monitoring system still includes the host computer that is used for switching operation preview and logic verification, the host computer is to the online intelligent early warning module of patrolling and applying for relay protection device's target state, online intelligent early warning module of patrolling and corresponding the list that the instantiation file returned the circuit breaker that needs to switch back, the switch, soft clamp plate and hard clamp plate according to relay protection device's target state and a secondary equipment state, the operator carries out the operation of switching according to the list, online intelligent early warning module of patrolling and guarding entirely verifies whether the operation of switching has the mistake, if there is the mistake then report an emergency and ask for help or increased vigilance, the host computer receives alarm information in real time.
Further, the data acquisition terminal is in communication connection with the relay protection device through an IEC61850 protocol, and collects the breaker position, the soft pressing plate position and the disconnecting link position in the relay protection device.
And further, after each pressure plate position sensor is electrified, the time synchronization request of the data acquisition terminal is received, the time of the pressure plate position sensor is synchronized, and after each pressure plate position sensor runs for a preset time, the time is requested again from the data acquisition terminal after the data is sent to the data acquisition terminal.
Furthermore, each of the platen position sensors wakes up sequentially at equal time intervals in a wake-up period, and the wake-up time of the platen position sensor corresponding to each hard platen is T ═ T0+TIxN, wherein, T0Indicating the wake-up period, TIIndicating equal time intervals and N indicates the current intra-group number of the hard platen.
Further, clamp plate position sensor includes induction system, inductive switch, power, host system, wireless sending module and radio frequency antenna are packaged in induction system's the shell, inductive switch, host system and wireless sending module power supply are given to the power, host system's IO gathers the port and is connected with inductive switch's switching value signal output part, host system's data transmission port is connected with wireless sending module's data reception port, and wireless sending module's data transmission port is connected with radio frequency antenna.
Furthermore, the inductive switch is a microswitch, the hard pressing plate comprises a connecting piece type knob for controlling the switching state of the hard pressing plate, a first fixing piece for fixing the hard pressing plate on external equipment and a first wiring terminal for connecting the hard pressing plate with a relay protection secondary circuit, the inductive device is fixedly installed on the side face of the first fixing piece, the connecting piece type knob is rotatably connected to the upper portion of the first fixing piece, and the first wiring terminal is installed below the first fixing piece.
Furthermore, the first fixing piece comprises two hollow cylinders which are arranged in a bilateral symmetry mode, the two hollow cylinders are fixedly connected through a connecting plate, and the bottoms of the two hollow cylinders are respectively connected with a first bolt which is provided with an external thread and is hollow inside; the side surfaces of the two hollow cylinders and the side surface of the connecting plate are fixedly connected with the side surface of the shell of the induction device;
the connecting piece type knob comprises a contact piece, the left side and the right side of the contact piece are provided with hooks, the middle of the contact piece is provided with a rectangular plate, the directions of the hooks on the left side and the right side of the contact piece are opposite, the hooks on the two sides of the contact piece are respectively positioned above the two hollow cylinders, hook eyes of the hooks face the hollow parts of the hollow cylinders, the middle of the rectangular plate is clamped with a fixture block, the fixture block is insulated, and the side surface of the fixture block faces the contact of the induction switch;
the number of the first binding posts is two, the hollow part of each first bolt is correspondingly provided with one first binding post, and the first binding posts sequentially penetrate through the hooks on the contact pieces, the hollow parts of the hollow cylinders of the first fixing pieces and the hollow parts of the first bolts below the first fixing pieces and are fixedly connected with the first fixing pieces; and the two first binding posts are connected into a relay protection secondary circuit.
Furthermore, the inductive switch is a ball switch, the hard pressing plate comprises a plugging knob for controlling the switching state of the hard pressing plate, a second fixing piece for fixing the hard pressing plate on external equipment and a second wiring terminal for connecting the hard pressing plate with a relay protection secondary circuit, and the inductive device is installed above the plugging knob and moves along with the plugging knob.
Furthermore, a first through hole is formed downwards in the center of the second fixing piece in the length direction, a limiting device is arranged on the second fixing piece below the first through hole, and the limiting device is a hollow cylinder; a second through hole is formed in each of the positions, located on the left side and the right side of the first through hole, of the second fixing piece, and a second bolt which is provided with an external thread and is hollow in a regular hexagon is mounted at a position below the second through hole in the second fixing piece;
furthermore, the plugging knob comprises a main body structure matched with the second fixing piece in shape and size, the sensing device is installed above the main body structure of the plugging knob through a double-faced adhesive tape, a pull rod is vertically installed downwards in the center of the main body structure, a spring is sleeved outside the pull rod, a fixing bolt is sleeved at the end part of the pull rod, screw holes with the same diameter are longitudinally formed in the end part of the pull rod and the fixing bolt, and a screw penetrates through the screw hole in one side of the fixing bolt and then penetrates through the screw hole in the end part of the pull rod and the screw hole in the other side of the fixing bolt to be locked; the main structure is provided with a guide rod at each of two sides of the pull rod, and the two guide rods are electrically connected at one side of the main structure.
Furthermore, the second binding post comprises a screw and a long rod which is provided with an internal thread and is in threaded connection with the screw, and the outer side shape of the long rod is matched with the shape of a regular hexagonal hollow part of the second bolt below the second fixing piece; the pull rod is located in the limiting device, the spring is located in a gap between the limiting device and the pull rod, guide rods on the left side and the right side of a main structure of the plugging knob are respectively installed in the two second through holes of the second fixing piece, the long rod of the second wiring terminal penetrates through the regular hexagon hollow portion of the second bolt below the second fixing piece from bottom to top, and in an initial state, screws in the second wiring terminal are in contact with the guide rods.
Further, the data acquisition terminal comprises a control circuit, a power circuit, a wireless communication circuit, an Ethernet communication circuit and a plurality of 485 serial port communication circuits, the wireless communication circuit, the Ethernet communication circuit and the power circuit are all connected with the control circuit, the control circuit receives signals of the sensing sensor in the transformer substation through the wireless communication circuit, and the control circuit is in communication connection with the online inspection intelligent early warning module through the 485 serial port communication circuit and the Ethernet communication circuit.
The invention has the advantages that:
(1) the information collected by the invention covers the relay protection soft pressing plate and the relay protection hard pressing plate, the system can be used in all types of substations, the application range is wide, the hard pressing plate position is collected by adopting the pressing plate position sensor, the relay protection device information is collected in a communication access mode, data support of a plurality of systems is not needed, the construction cost is lower, the efficiency is higher, the identification processing of primary equipment state operation is simplified, the incidence relation of primary equipment operation state and secondary equipment operation state is automatically generated by adopting a basic operation rule, the current operation state and the target state of the relay protection device are obtained according to the incidence relation and compared, the practical effect is higher, and the relay protection device can be more easily put into practical application.
(2) The invention is provided with the upper computer for preview and logic verification of switching operation, so that misoperation on the pressing plate in field operation can be found in time, and safe and stable operation of a power grid can be ensured.
(3) According to the invention, each pressure plate position sensor receives a time synchronization request of a data acquisition terminal after being electrified, the time of the pressure plate position sensor is synchronized, after each pressure plate position sensor runs for a preset time, the time is requested to the data acquisition terminal again after the data is sent to the data acquisition terminal, and the time deviation after long-time running is corrected.
(4) In order to prevent the collision of sent data when a plurality of pressure plate position sensors are awakened simultaneously, the awakening period is set, each pressure plate position sensor is awakened in sequence at equal time intervals in the awakening period, and the awakening time point of each pressure plate is fixed according to the serial number in the group.
(5) The invention aims at the hard pressing plates of the conventional transformer substation and the intelligent transformer substation, the state of the pressing plate is detected by a non-electric quantity induction principle sensor, namely a ball switch or a microswitch, and along with the change of the position of the operable part of the pressing plate, the change of the state of the pressing plate is converted into switching value output to be uploaded to a main control module. The protective device is installed on the original pressing plate in a clamping and sticking mode, and power failure and change of the working state of the protective measurement and control device and the pressing plate are not needed.
(6) The hard pressing plate switching state is controlled through the connecting piece type knob, the connecting piece type knob rotates in the hard pressing plate switching process, the contact of the induction switch is over against the connecting piece type knob, the connecting piece type knob is in contact with or not in contact with the induction switch along with the rotation of the connecting piece type knob, so that the induction switch is triggered or not triggered, the state of the induction switch corresponds to the state of the hard pressing plate, the main control module receives the state of the induction switch and sends out a switching value signal through the wireless sending module and the radio frequency antenna, namely the state of the hard pressing plate is sent out, therefore, the hard pressing plate switching state does not need manual regular inspection, the monitoring mode for the switching-on and-off condition of the hard pressing plate is safe and effective, and the influence on the safe and stable operation of a power grid is avoided.
(7) The switching state of the hard pressing plate is controlled through the plugging knob, the plugging knob rotates in the switching process of the hard pressing plate, the sensing device is mounted above the plugging knob and moves along with the plugging knob, the sensing device senses the action of the switch in the moving process, the switching state of the hard pressing plate is indirectly reflected through the state of the sensing switch, the state of the sensing switch is received through the main control module, and a switching value signal is sent out through the wireless sending module and the radio frequency antenna, so that the switching state of the hard pressing plate does not need manual regular inspection, the monitoring mode for the switching-on and switching-off state of the hard pressing plate is safe and effective, and the influence on the safe and stable operation of a power grid is avoided.
(8) The invention receives signals of sensing sensors in the transformer substation through the wireless communication circuit and transmits the signals to the control circuit for processing, the control circuit is in communication connection with an external application system, namely an online patrol intelligent early warning module, through the 485 serial port communication circuit and the Ethernet communication circuit, the control circuit transmits processed data to the external application system, the data analysis and processing of the sensors are realized without background application software, the requirements on the background application software are not high, and the adaptability is stronger.
Drawings
Fig. 1 is a schematic structural diagram of a system of a relay protection soft-hard pressure plate integrated online monitoring system provided in embodiment 1 of the present invention;
fig. 2 is a data processing flow chart of a relay protection soft and hard pressure plate integrated online monitoring system provided in embodiment 1 of the present invention;
fig. 3 is a structural block diagram of an online patrol intelligent early warning module of the relay protection software and hardware pressing plate integrated online monitoring system provided in embodiment 1 of the present invention;
fig. 4 is a flowchart of an online patrol intelligent early warning module of the relay protection soft and hard pressure plate integrated online monitoring system provided in embodiment 1 of the present invention;
fig. 5 is an exemplary diagram of a model of a total station primary and secondary device in a relay protection soft and hard pressure plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 6 is an exemplary diagram of an association model of relay protection and a pressing plate in the relay protection software and hardware pressing plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 7 is a logic block diagram of foreplay and logic verification of a switching operation performed by an upper computer in the relay protection soft and hard pressure plate integrated online monitoring system provided in embodiment 1 of the present invention;
fig. 8 is a flowchart illustrating the preview and logic verification of the commissioning operation performed by the upper computer in the relay protection soft and hard pressure plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 9 is a schematic circuit diagram of a platen position sensor in a relay protection soft and hard platen integrated online monitoring system according to embodiment 1 of the present invention;
fig. 10 is a schematic structural diagram of a hard pressing plate of a relay protection soft and hard pressing plate integrated online monitoring system in which a hard pressing plate of a pressing plate position sensor is in an operating state, according to embodiment 1 of the present invention;
fig. 11 is a schematic structural diagram of a hard platen exit state of a platen position sensor in an online monitoring system with integrated relay protection software and hard platens according to embodiment 1 of the present invention;
fig. 12 is a schematic circuit block diagram of a data acquisition terminal in a relay protection soft and hard pressure plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 13 is a schematic diagram of a power supply circuit of a data acquisition terminal in a relay protection soft and hard pressure plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 14 is a schematic diagram of a control circuit of a data acquisition terminal in a relay protection soft and hard pressure plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 15 is a schematic diagram of a wireless communication circuit of a data acquisition terminal in a relay protection soft/hard pressing plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 16 is a schematic diagram of an ethernet communication circuit of a data acquisition terminal in a relay protection soft/hard pressing plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 17 is a schematic diagram of a 485 serial port communication circuit of a data acquisition terminal in a relay protection soft and hard pressure plate integrated online monitoring system according to embodiment 1 of the present invention;
fig. 18 is a schematic structural diagram of a second fixing member of a platen position sensor in a relay protection soft and hard platen integrated online monitoring system according to embodiment 2 of the present invention;
fig. 19 is a schematic structural diagram of a plugging knob of a platen position sensor in a relay protection soft and hard platen integrated online monitoring system according to embodiment 2 of the present invention;
fig. 20 is a schematic structural diagram of a second terminal of a platen position sensor in a relay protection soft and hard platen integrated online monitoring system according to embodiment 2 of the present invention;
fig. 21 is an assembly schematic diagram of a platen position sensor in a relay protection soft and hard platen integrated online monitoring system according to embodiment 2 of the present invention;
fig. 22 is an exploded schematic view of a platen position sensor in a relay protection software and hardware platen integrated online monitoring system according to embodiment 2 of the present invention;
fig. 23 is a schematic diagram of a relay protection soft and hard pressure plate integrated online monitoring system according to embodiment 2 of the present invention, in which a hard pressure plate of a pressure plate position sensor is in a state of exiting from the system;
fig. 24 is a schematic view illustrating that the plugging knob rotates around the second fixing element when the hard pressing plate of the pressing plate position sensor in the relay protection soft-hard pressing plate integrated online monitoring system provided in embodiment 2 of the present invention is in a withdrawing state.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in figure 1, a relay protection software and hardware clamp plate integrated online monitoring system comprises a clamp plate position sensor, a data acquisition terminal and an online patrol intelligent early warning module, wherein the data acquisition terminal acquires a breaker position, a soft clamp plate position and a disconnecting link position in a relay protection device in a communication mode, the data acquisition terminal acquires the hard clamp plate position through the clamp plate sensor, and the online patrol intelligent early warning module receives information acquired by the data acquisition terminal in real time.
According to the definition of the power system to the operation state of the primary equipment, the primary equipment has the following operation states: running, overhauling, cold standby and hot standby; the relay protection device has the following operation states of operation, maintenance, signal and exit. Under different operation states of the primary equipment, the associated relay protection device has a corresponding operation state. Therefore, in the monitoring of the pressing plate state, the online monitoring and early warning of the pressing plate on-off state can be quickly realized through the analysis of the corresponding operation state of the relay protection device under different operation states of the primary equipment.
Firstly, defining the corresponding breaker and disconnecting link positions of primary equipment in different running states, taking a 220kV line as an example:
Figure BDA0003264188960000081
secondly, defining a pressing plate switching rule matrix of different types of relay protection devices in different running states, taking line protection as an example:
Figure BDA0003264188960000082
and re-defining the corresponding relay protection operation states of the primary equipment in different operation states, taking a 220kV line as an example:
Figure BDA0003264188960000083
Figure BDA0003264188960000091
the online patrol intelligent early warning module reads a primary and secondary equipment state corresponding instantiation file, the primary and secondary equipment state corresponding instantiation file defines the corresponding breaker position and the corresponding disconnecting link position of the primary equipment in different operation states according to the method, defines soft pressing plates and hard pressing plate switching rule matrixes in different operation states of different types of relay protection devices, defines the corresponding relay protection operation states of the primary equipment in different operation states, identifies the current operation state of the primary equipment through the collected real-time data of the breaker and the disconnecting link, and identifies the current operation state of the relay protection device through the collected real-time data of the soft pressing plates and the hard pressing plates; and identifying the target state of the relay protection device through the running state of the primary equipment, comparing the current running state of the relay protection device with the target state of the relay protection device in real time, and giving an alarm if the running state is inconsistent with the target state.
As shown in fig. 2 to 4, the online patrol intelligent early warning module is divided into a data refreshing and processing submodule, a model and public cache submodule, a state analysis submodule, a periodic patrol and intelligent early warning submodule and a result file generating submodule, the relay protection software-hard pressing plate integrated online monitoring system further comprises a configuration tool, and the processing flow of the online patrol intelligent early warning module is as follows: the configuration tool builds a total-station primary and secondary equipment model and defines corresponding breaker positions and disconnecting link positions of primary equipment in different running states, soft pressing plate and hard pressing plate switching rule matrixes of different types of relay protection devices in different running states and corresponding relay protection running states of the primary equipment in different running states to generate a primary and secondary equipment state corresponding instantiation file. The total station primary and secondary equipment model is as shown in fig. 5, and the model can be established according to the actual condition of the transformer substation, and the primary and secondary equipment models are different. The change of the running states of the circuit, the transformer and the bus is realized by the on-off operation of the circuit breaker and the disconnecting link. Therefore, the actual running states of the line, the transformer and the bus can be directly judged only by correlating the breaker position and the disconnecting link position identification. The running state change of the relay protection device is realized by the switching operation of the soft pressing plate and the hard pressing plate. Therefore, the relay protection operation state can be directly judged only through the current switching states of the associated soft pressing plate and the hard pressing plate. The model of the association of relay protection and platen is shown in fig. 6.
Initializing the model and a public cache submodule, and reading a corresponding instantiation file of the primary and secondary equipment states of the whole station.
The data refreshing and processing submodule periodically reads the latest soft pressing plate state, the latest hard pressing plate state and the latest breaker and disconnecting link state from the real-time database (the real-time database is a data storage position acquired by the data acquisition terminal) to the model and public cache submodule.
And the state analysis submodule automatically analyzes the current operating state of the primary equipment and the current operating state of the relay protection device according to the definition of the operating state of the primary and secondary equipment and the latest real-time data, and writes the latest state into a database.
The periodic patrol and intelligent early warning sub-module defines the incidence relation among the current operation state of the primary equipment, the current operation state of the relay protection and the operation state of the primary and secondary equipment in a plurality of tables according to the incidence relation among the current operation state of the primary equipment, the current operation state of the relay protection and the operation state of the primary and secondary equipment, and the incidence relation is embodied according to the instantiation file corresponding to the state of the primary and secondary equipment generated according to the definition. And analyzing the matching correctness of the running state in real time, sending abnormal alarm information when an abnormality is found, and calling a result file generation submodule to generate a scene report detail file.
The periodic patrol and intelligent early warning submodule also automatically calls a result generation submodule to generate a patrol report file according to a preset period.
As shown in fig. 7 and 8, the relay protection soft and hard pressure plate integrated online monitoring system further comprises an upper computer for preview of operation and logic verification, when an operator performs the operation of putting on and off the soft pressure plate and the hard pressure plate, the upper computer applies for the target state of the relay protection device to the online patrol intelligent early warning module, the online patrol intelligent early warning module returns a list corresponding to a breaker, a disconnecting link, the soft pressure plate and the hard pressure plate to be put on and off, the current operating states of the primary equipment and the secondary equipment and the latest state of each pressure plate according to the target state of the relay protection device and a corresponding instantiation file of the state of the primary equipment and the state of the secondary equipment, the putting on and putting off operation of the pressure plates can be started after the operator confirms, the operator performs the operation of putting on and putting off according to the list, each operation is performed, the online patrol intelligent early warning module automatically hooks the putting on and putting off lists of the soft pressure plate and the hard pressure plate, and gives a corresponding prompt of the function or the loop of the protection device together with the front and back change, the online patrol intelligent early warning module monitors the whole process and verifies whether the operation of putting on and taking off is wrong, when the pressing plate putting on and taking off sequence is wrong and the pressing plate outside the list is put on and taken off by mistake, the online patrol intelligent early warning module gives an alarm of the mistake of putting on and taking off the pressing plate, and the upper computer receives alarm information in real time.
The invention aims at the soft pressing plate of the conventional transformer substation and the intelligent transformer substation and the positions of the circuit breaker and the disconnecting link, and can realize the acquisition of the real-time state of the soft pressing plate and the positions of the circuit breaker and the disconnecting link by establishing Ethernet or serial port communication with the protection device. An IEC103 protocol is generally adopted in a conventional transformer substation, an IEC61850 protocol is generally adopted in an intelligent transformer substation, and a bus protection device of the transformer substation supports the collection and output of the positions of the circuit breakers in the same voltage class. Aiming at the hard pressing plates of the conventional transformer substation and the intelligent transformer substation, the state of the pressing plate is detected through a non-electric quantity sensing principle sensor, along with the change of the position of the operable part of the pressing plate, the change of the state of the pressing plate is converted into switching value output, the switching value output is uploaded to the main control module 103, and the switching value signal is acquired and output. The protective device is installed on the original pressing plate in a clamping and sticking mode, and power failure and change of the working state of the protective measurement and control device and the pressing plate are not needed. In this embodiment, as shown in fig. 9, the pressing plate position sensor includes an induction device 1, the hard pressing plate includes a connecting piece type knob 3 for controlling the switching state of the hard pressing plate, a first fixing member 2 for fixing the hard pressing plate on an external device, and a first terminal 4 for connecting the hard pressing plate with a secondary relay protection loop, the induction device 1 is fixedly installed on a side surface of the first fixing member 2, the connecting piece type knob 3 is rotatably connected above the first fixing member 2, the first terminal 4 is installed below the first fixing member 2, the induction device 1 includes an induction switch 101, the induction switch 101 is a micro switch, a first groove is opened on one side of a housing of the induction device 1 facing the first fixing member 2, the induction switch 101 is clamped in the first groove, a contact of the induction switch 101 faces the connecting piece type knob 3, and a power source 102, a power source 4, a second terminal, and a second terminal are sealed in the housing of the induction device 1, The wireless transmission system comprises a main control module 103, a wireless transmission module 104 and a radio frequency antenna 105, wherein the power supply 102 supplies power to the inductive switch 101, the main control module 103 and the wireless transmission module 104, an IO acquisition port of the main control module 103 is connected with a switching value signal output end of the inductive switch 101, a data transmission port of the main control module 103 is connected with a data receiving port of the wireless transmission module 104, and a data transmission port of the wireless transmission module 104 is connected with the radio frequency antenna 105.
The first fixing part 2 comprises two hollow cylinders 201 which are arranged in bilateral symmetry, the two hollow cylinders 201 are fixedly connected through a connecting plate 202, the bottoms of the two hollow cylinders 201 are respectively connected with a first bolt 203 which is provided with an external thread and is hollow inside, the inner diameter of each hollow cylinder 201 is the same as that of the first bolt 203, one of the two hollow cylinders 201 is provided with an arc-shaped baffle 204, and the arc-shaped baffle 204 is arranged above the hollow cylinder 201. The side surfaces of the two hollow cylinders 201 and the side surface of the connecting plate 202 are fixedly connected with the side surface of the shell of the induction device 1, and the bottom surface of the shell of the induction device 1 is flush with the bottom surface of the hollow cylinder 201.
The piece connecting type knob 3 comprises contact pieces 301, the left side and the right side of each contact piece are provided with hooks, the middle of each contact piece is provided with a rectangular plate, the directions of the hooks on the left side and the right side of each contact piece 301 are opposite, the hooks on the two sides of each contact piece 301 are respectively positioned above the two hollow cylinders 201, and hook eyes of the hooks are opposite to the inner hollow of the hollow cylinders 201. A clamping block 302 is arranged in the middle of the rectangular plate, a clamping groove is formed in the bottom of the clamping block 302, the clamping block 302 is clamped in the middle of the rectangular plate through the clamping groove in the bottom of the clamping block 302, and the side face of the clamping block 302 faces the contact of the induction switch 101. A cavity is formed among the contact piece 301, the connecting plate 202, the sensing device 1 and the two hollow cylinders 201, and the first groove on the shell of the sensing device 1 is positioned at the side of the cavity and the contact of the sensing switch 101 clamped in the first groove is just opposite to the side surface of the fixture block 302. The fixture block 302 is insulated, and the fixture block 302 is used for manually rotating the contact piece 301 to enable the contact piece 301 to be far away from the first terminal post 4 or to be in contact with the first terminal post 4, and meanwhile, the fixture block 302 can be far away from the inductive switch 101 or touch the inductive switch 101 in the rotating process.
The first binding post 4 has two, and first binding post 4 has smooth cylinder rod-shaped structure in middle of the external screw thread for last lower extreme, respectively establish a first gasket 6 about the crotch, is equipped with nut 5 on the first gasket 6 of crotch top, sets up first nut 7 between the first gasket 6 of crotch below and the top of hollow cylinder 201, a second nut 8 of first bolt 203 threaded connection of first mounting 2 below, set up a third nut 9, set gradually two second gaskets 10 below of third nut 9 under the first bolt 203 of first mounting 2 below, set up fourth nut 11 below of second gasket 10, nut 5 with the upper end threaded connection of first binding post 4, first binding post 4 passes crotch, another first gasket 6, first nut 7 on contact piece 301 in proper order, The hollow portion of the hollow cylindrical body 201 of the first fixing member 2, the hollow portion of the first bolt 203 below the first fixing member 2, the third nut 9, the two second washers 10, and the fourth nut 11, and the first nut 7, the third nut 9, and the fourth nut 11 are all screwed to the first terminal 4.
The inner arc surface of the arc-shaped baffle 204 on the first fixing piece 2 is attached to the outer side of the first gasket 6, and the arc-shaped baffle 204 is used for preventing deviation when the contact piece 301 rotates around the first binding post 4.
A second groove is formed in the hollow part of the first bolt 203 below the first fixing part 2, a convex block is arranged at the position, right opposite to the second groove, of the first binding post 4, the convex block is clamped in the second groove and used for further clamping the sensor, and the hollow parts of the hollow cylinder 201 and the first bolt 203 are in threaded connection with the first binding post 4 through threads. The first bolt 203 and the second nut 8 below the first fixing part 2 are used for fixing the sensor on external equipment, and the gap between the two second gaskets 10 is used for connecting a lead of a relay protection secondary circuit.
The working process of the pressure plate position sensor in the embodiment is as follows: referring to fig. 10, when the hard pressing plate is put in, the hooks of the two contact pieces 301 of the connected piece type knob 3 are both clamped on the first terminal post 4, the first terminal post 4 and the contact piece 301 are in a connection state, the relay protection secondary circuit is conducted, at this time, the clamping block 302 just props against the contact of the inductive switch 101, the micro-switch action is also in a closed state, the IO acquisition port of the main control module 103 is connected with the switching value signal output end of the inductive switch 101 to acquire the switching value signal of the inductive switch 101, the data transmission port of the main control module 103 is connected with the data receiving port of the wireless transmission module 104, the data transmission port of the wireless transmission module 104 is connected with the radio frequency antenna 105, the main control module 103 transmits the received switching value signal of the inductive switch 101 through the wireless transmission module 104 and the radio frequency antenna 105, that is the closed signal of the inductive switch 101, since the switching value signal of the inductive switch 101 corresponds to the on/off state of the hard pressing plate (i.e., whether the contact piece 301 is in contact with the first terminal 4 or not), it is equivalent to sending out the signal input by the hard pressing plate.
Referring to fig. 11, when the hard pressing plate is withdrawn, the fixture block 302 on the connecting piece type knob 3 drives the contact piece 301 to rotate around the first terminal 4 on the side where the arc-shaped baffle 204 is installed to the direction away from the sensing device 1, the hook on the other side of the contact piece 301 is away from the first terminal 4, only one of the two hooks of the contact piece 301 is clamped on the corresponding first terminal 4, the first terminal 4 and the contact piece 301 are in a non-connection state, the relay protection secondary circuit is disconnected, at this time, the fixture block 302 is away from the contact of the sensing switch 101, the micro-switch is not operated, that is, in a disconnection state, the IO acquisition port of the main control module 103 is connected with the switching value signal output end of the sensing switch 101 to acquire the switching value signal of the sensing switch 101, the data transmission port of the main control module 103 is connected with the data receiving port of the wireless transmission module 104, the data transmission port of the wireless transmission module 104 is connected with the radio frequency antenna 105, the main control module 103 sends out the received switching value signal of the inductive switch 101, that is, sends out the signal that the inductive switch 101 is turned off through the wireless sending module 104 and the rf antenna 105, and since the switching value signal of the inductive switch 101 corresponds to the on/off state of the hard pressing plate (that is, whether the contact piece 301 is in contact with the first binding post 4 or not), it is equivalent to sending out the signal that the hard pressing plate exits.
As shown in fig. 12, in this embodiment, the data acquisition terminal includes a power circuit 12, a control circuit 13, a wireless communication circuit 14, an ethernet communication circuit 15, and a plurality of 485 serial communication circuits 16, where the plurality of 485 serial communication circuits 16, the wireless communication circuit 14, the ethernet communication circuit 15, and the power circuit 12 are all connected to the control circuit 13, the control circuit 13 receives signals of the sensing sensors in the substation through the wireless communication circuit 14, and the control circuit 13 is in communication connection with an external application system through the 485 serial communication circuit 16 and the ethernet communication circuit 15.
As shown in fig. 13, the power supply circuit 12 includes a resistor RF1, a voltage dependent resistor RV1, a chip DC1, a capacitor C1, a diode D1, a capacitor C2, a capacitor C7, a resistor R6, and a light emitting diode CR5, and the chip DC1 is IRM-02-3.3 in model. One end of the resistor RF1 and one end of the piezoresistor RV1 are respectively connected to two ends of an external power interface, the other end of the resistor RF1, the other end of the piezoresistor RV1 and a first pin of the chip DC1 are connected, and a second pin of the chip DC1 is connected with one end of the piezoresistor RV 1; a fourth pin of the chip DC1, one end of a capacitor C1, a pin of a diode D1, one end of a capacitor C2 and one end of a capacitor C7 are connected, one end of a capacitor C7 is used as an output interface of a power supply VCC, a third pin of the chip DC1, one end of a resistor R6, the other end of the capacitor C1, an anode of a diode D1, the other end of the capacitor C2 and the other end of a capacitor C7 are connected, and the other end of the capacitor C7 is grounded; the other end of the resistor R6 is connected to the cathode of the led CR5, and the anode of the led CR5 serves as the other output port of the power VCC. The power circuit 12 provides voltage required by a working circuit through voltage reduction of the chip DC1, and forms a filter circuit through a capacitor resistor to filter voltage interference, so that a stable and reliable power supply is provided.
As shown in fig. 14, the control circuit 13 includes a chip U2A, a crystal oscillator CRY1, a resistor R3, a capacitor C5, a resistor R7, and a light emitting diode CR6, and the model of the chip U2A is STM32L051C8T 6. One end of the crystal oscillator CRY1 is connected with a third pin of the chip U2A, the other end of the crystal oscillator CRY1 is connected with a fourth pin of the chip U2A, one end of the resistor R3 is connected with a forty-fourth pin of the chip U2A, and the other end of the resistor R3 is grounded; one end of the capacitor C5 is connected with the seventh pin of the chip U2A, and the other end of the capacitor C5 is grounded; one end of the resistor R7 is connected with the thirty-third pin of the chip U2A, the other end of the resistor R7 is connected with the cathode of the light-emitting diode CR6, and the anode of the light-emitting diode CR6 is connected with the power VCC.
As shown in fig. 15, the wireless communication circuit 14 includes a chip U1, a capacitor C3, a capacitor C4, a capacitor C6, and an inductor L1, and the model of the chip U1 is ZM433 SX-L. A fifth pin of the chip U1 is connected with a thirty-second pin of the chip U2A, a sixth pin of the chip U1 is connected with a thirty-first pin of the chip U2A, and a fourteenth pin, a fifteenth pin, a sixteenth pin, a seventeenth pin and an eighteenth pin of the chip U1 are connected with a twenty-sixth pin, a twenty-seventh pin, a twenty-eighth pin, a twenty-ninth pin and a thirty-third pin of the chip U2A in a one-to-one correspondence manner; one end of a capacitor C3 is connected with the twenty-first pin of the chip U1, the other end of a capacitor C3 is connected with one end of a capacitor C4, one end of the capacitor C4 is used as an antenna interface to be connected with an antenna, and the other end of the capacitor C4 is grounded; one end of the inductor L1 is connected with the thirteenth pin of the chip U1, the other end of the inductor L1 is connected with the power supply VCC, one end of the capacitor C6 is connected with the twelfth pin of the chip U1, and the other end of the capacitor C6 is connected with one end of the inductor L1; the first pin to the fourth pin, the eleventh pin, the twenty-second pin, the twentieth pin and the nineteenth pin of the chip U1 are all grounded.
As shown in fig. 16, the ethernet communication circuit 15 includes a chip T1, a capacitor C9, and a capacitor C8, the eighth pin of the chip T1 is connected to the twelfth pin of the chip U2A, the ninth pin of the chip T1 is connected to the thirteenth pin of the chip U2A, one end of the capacitor C8, one end of the capacitor C9, the eleventh pin of the chip T1, the fifteenth pin of the chip T1, and the fourteenth pin of the chip T1 are connected, and the other end of the capacitor C8, the other end of the capacitor C9, and the tenth pin of the chip T1 are connected to ground; the twelfth pin of the chip T1 is connected to the sixteenth pin thereof, and the thirteenth pin of the chip T1 is connected to the seventh pin thereof.
As shown in fig. 17, the 485 serial communication circuit 16 includes a light emitting diode CR1, a light emitting diode CR2, a resistor R1, a resistor R2, and a chip U4, and the model of the chip U4 is RSM485 CHT. The anode of the light emitting diode CR1 and the anode of the light emitting diode CR2 are both connected with a power supply VCC, one end of a resistor R1 is connected with the cathode of the light emitting diode CR1, one end of a resistor R2 is connected with the cathode of the light emitting diode CR2, the other end of a resistor R1 is connected with a third pin of a chip U4, the other end of the resistor R2 is connected with a fourth pin of a chip U4, a first pin of the chip U4 is connected with the power supply VCC, a second pin of the chip U4 is grounded, a third pin of the chip U4 is connected with a twenty-first pin of a chip U2A, a fourth pin of the chip U4 is connected with a twenty-second pin of the chip U2A, and an eighth pin to a tenth pin of the chip U4 are used as external communication interfaces to be in communication connection with an external application system.
The data acquisition terminal receives signals of sensing sensors in the transformer substation through the wireless communication circuit 14 and transmits the signals to the control circuit 13 for processing, the control circuit 13 is in communication connection with an external application system through the 485 serial port communication circuit 16 and the Ethernet communication circuit 15, the control circuit 13 transmits processed data to the external application system, the external application system is an online patrol intelligent early warning module in the embodiment, data analysis and processing of the sensors are achieved without background application software, requirements on the background application software are not high, and adaptability is high.
The pressure plate position sensor and the data acquisition terminal adopt star-shaped communication in actual deployment, the pressure plate position sensor is a sending end, the data acquisition terminal is a receiving end, and a plurality of pressure plate position sensors correspond to the periphery of one data acquisition terminal. The pressure plate position sensor receives a time synchronization request of the data acquisition terminal after being electrified, and synchronizes the time of the pressure plate position sensor after receiving the time synchronization request, so that the synchronization of all the sensors is realized in this way. After the sensor operates for 7 days, the time is requested from the data acquisition terminal again after the data is sent, and the time deviation after long-time operation is corrected. For preventing that a plurality of clamp plate position sensor send data when awakening up simultaneously and collide to 10 minutes are awakening cycle once, each clamp plate position sensor is awaken up in proper order with equal time interval, and each clamp plate awakens up the time point and fixes according to the serial number in the group, and the calculation mode is:
T＝T0+TI×N
T0the wakeup cycle points are shown as whole minute times of 0, 10, 20, 30, 40, 50 per hour.
TIRepresents the time interval of 200 pressing plates at equal time intervals
Figure BDA0003264188960000151
N denotes the intra-group number of the platen.
Example (c): pressing plate No. 17 in the group: 3 × 17 equals 51s, with wake-up time points of 51s per hour, 10 min 51s, 20 min 51s, and so on.
Example 2
The difference between embodiment 2 of the present invention and embodiment 1 is that the hard platen has a different structure, so that the platen position sensor is different from embodiment 1, and the circuit principle in the platen position sensor in this embodiment is the same, and refer to fig. 9, except that the inductive switch 101 in this embodiment is a ball switch. The pressing plate position sensor comprises a sensing device 1, wherein the sensing device 1 is installed above the hard pressing plate through a double-sided adhesive tape, a sensing switch 101, a power source 102, a main control module 103, a wireless sending module 104 and a radio frequency antenna 105 are packaged in a shell of the sensing device 1, and the power source 102 supplies power to the sensing switch 101, the main control module 103 and the wireless sending module 104. An IO acquisition port of the main control module 103 is connected with a switching value signal output end of the inductive switch 101, a data transmission port of the main control module 103 is connected with a data receiving port of the wireless sending module 104, and a data sending port of the wireless sending module 104 is connected with the radio frequency antenna 105. An IO acquisition port of the main control module 103 acquires a switching value signal of the inductive switch 101 and transmits the switching value signal through the wireless transmission module 104 and the radio frequency antenna 105. The main control module 103 may adopt STM32L051C8T6, and may also adopt other types of single-chip microcomputers or microcontrollers. The master chip of the wireless transmission module 104 can adopt ZM433SX-L, and can also adopt other wireless transmission modules.
As shown in fig. 18 and 21, the hard pressure plate includes a second fixing member 17, a plugging knob 18, and two second terminals 19 mounted on the second fixing member 17, the second fixing member 17 is mounted on an external device, a mounting hole 1701 is provided on the second fixing member 17, the second fixing member 17 is fixed on the external device through the mounting hole 1701, for example, on a relay protection device where the hard pressure plate needs to be disposed, the second fixing member 17 is a rectangular parallelepiped structure, a first through hole 1702 is formed downward in the center of the second fixing member 17 in the length direction, a second through hole 1703 is formed in each of the positions of the second fixing member 17 located on the left and right sides of the first through hole 1702, a limiting device 1704 is mounted on the second fixing member 17 located below the first through hole 1702, the limiting device 1704 is a hollow cylinder, a second bolt 5 having an external thread and a regular hexagon hollow interior is mounted on the position below the second through hole 1703 on the second fixing member 17, a fifth nut 1706 is fixed outside the second bolt 1705, a gap is formed between the fifth nut 1706 and the bottom surface of the second fixing member 17, and the fifth nut 1706 is used for further locking and fixing the second fixing member 17 on an external device.
As shown in fig. 19, the plugging knob 18 includes a rectangular main body structure 1801 matched with the second fixing member 17 in size, and the sensing device 1 is installed above the main body structure 1801 of the plugging knob 18 through a double-sided tape. A pull rod 1802 is vertically installed downwards in the center of the main body structure 1801, a guide rod 1803 is installed at each of two sides of the pull rod 1802 on the main body structure 1801, the two guide rods 1803 are electrically connected at one side of the main body structure 1801, the pull rod 1802 is integrally of a cylindrical structure, a spring 1804 is sleeved outside the pull rod 1802, the end of the pull rod 1802 is flat, a fixing bolt 1805 is sleeved on the end of the pull rod 1802, a groove matched with the end of the pull rod 1802 in shape and size is formed in the fixing bolt 1805, screw holes with the same diameter are longitudinally formed in the end of the pull rod 1802 and the fixing bolt 1805, a screw 1806 penetrates through the screw hole in one side of the fixing bolt 1805 and then penetrates through the screw hole in the end of the pull rod 1802 and the screw hole in the other side of the fixing bolt 1805 to be locked, and the spring 1804 is limited on the pull rod 1802. The diameter of the limiting device 1704 is larger than that of the first through hole 1702 of the second fixing piece 17, the diameter of the fixing bolt 1805 is larger than that of the first through hole 1702 and smaller than that of the limiting device 1704, one end of the spring 1804 abuts against the lower side of the first through hole 1702 of the second fixing piece 17, the other end of the spring 1804 abuts against the upper portion of the fixing bolt 1805, the second fixing piece 17 is pulled upwards, the fixing bolt 1805 and the pull rod 1802 move upwards integrally, the spring 1804 is in a compressed state in the limiting device 1704, the second fixing piece 17 returns downwards, the fixing bolt 1805 and the pull rod 1802 move downwards integrally, the spring 1804 recovers in the limiting device 1704 and is in a normal state, in the initial state, the spring 1804 is in a state of neither compression nor tension, and the upper surface of the second fixing piece 17 just fits against the lower surface of the main structure 1801 of the plugging knob 18.
As shown in fig. 20, the second terminal 19 includes a screw 1901, an elongated rod 1902 having an internal thread and being screwed with the screw 1901, the external shape of the elongated rod 1902 matches the shape of the regular hexagonal hollow of the second bolt 1705 under the second fixing member 17, and the elongated rod 1902 is fixedly connected with the second bolt 1705 under the second fixing member 17. In order to facilitate wiring, a third gasket 1903 is mounted at the lower end of the screw 1901, and meanwhile, for good electric conduction effect, an annular copper sheet 1904 is additionally arranged in a gap between the long rod 1902 and the guide rod 1803.
The pull rod 1802 is located in the limiting device 1704, the spring 1804 is located in a gap between the limiting device 1704 and the pull rod 1802, the guide rods 1803 on the left side and the right side of the main structure 1801 of the plugging knob 18 are respectively installed in the two second through holes 1703 of the second fixing member 17, the second terminal 19 penetrates through a regular hexagon hollow portion of the second bolt 1705 below the second fixing member 17, in an initial state, the screw 1901 in the second terminal 19 is in contact with the guide rods 1803, the guide rods 1803 and the screw 1901 are electrically conductive, and the outer surface of the second fixing member 17, the outer surface of the plugging knob 18 and the shell of the sensing device 1 are insulated.
The working process of the pressure plate position sensor in the embodiment is as follows:
firstly, it should be noted that the operating principle of the ball switch is the prior art, a box for placing a ball is arranged in the ball switch, a contact number A, B, C is arranged on each of three faces of the box, when the pressing plate is put in, the ball switch rotates, wherein two contacts A and B are connected, when the pressing plate is withdrawn, the ball switch rotates by a certain angle, the ball rolls, the two contacts A and B are disconnected, the two contacts B and C are connected, in practical application, only the contact A and the contact B are used, and the power-on state of the ball switch is switched when the ball rolls.
As shown in fig. 21 to 24, in an initial state, two second terminals 19 are connected to a secondary relay protection circuit, two guide rods 1803 of the plugging knob 18 are respectively located in two second through holes 1703 of the second fixing member 17, the guide rods 1803 are in contact with screws 1901 in the second terminals 19, a circuit is in a connected state, that is, a hard pressure plate is in a put-in state, at this time, balls of the inductive switch 101 in the inductive device 1 do not roll, the inductive switch 101 is in a closed state, an IO acquisition port of the main control module 103 acquires a switching value signal of the inductive switch 101 and transmits the signal through the wireless transmission module 104 and the radio frequency antenna 105, and an external acquisition device acquires that the inductive switch 101 is in a closed state, which indicates that the hard pressure plate is in a put-in state.
As shown in fig. 23, when the hard pressing plate is withdrawn, that is, the plugging knob 18 and the sensing device 1 are integrally pulled upward, the guide rod 1803 is away from the second through hole 1703, the pull rod 1802 at the center of the plugging knob 18 rotates around the first through hole 1702 so that the guide rod 1803 deviates from the main structure 1801 of the plugging knob 18 and then stops the pulling action, under the action of the spring 1804, the main structure 1801 of the plugging knob 18 moves downward to be engaged with the upper surface of the second fixing member 17, at this time, since the guide rod 1803 has been pulled out of the second through hole 1703, the guide rod 1803 is not in contact with the screw 1901 in the second terminal 19, at this time, the circuit is in an open circuit state, that is, the hard pressing plate is in the withdrawn state, at this time, the ball of the sensing switch 101 in the sensing device 1 rolls, the sensing switch 101 is in the open state, the IO collecting port of the main control module 103 collects the switching value signal of the sensing switch 101 and sends it out through the wireless sending module 104 and the rf antenna 105, the external acquisition equipment acquires that the inductive switch 101 is in an off state, which indicates that the hard pressing plate is in an exit state.
As shown in fig. 21, when the hard pressing board is put in again, the plugging knob 18 and the sensing device 1 are integrally pulled upwards, the pull rod 1802 in the center of the plugging knob 18 rotates around the first through hole 1702 to make the guide rod 1803 approach to the main body structure 1801 of the plugging knob 18 and stop pulling after the guide rod 1803 is inserted into the second through hole 1703, under the action of the restoring force of the spring 1804, the main body structure 1801 of the plugging knob 18 moves downwards to be attached to the upper surface of the second fixing member 17, at this time, because the guide rod 1803 contacts with the screw 1901 in the second terminal 19, the circuit is in the on state again, that is, the hard pressing board is in the put-in state, at this time, the ball of the sensing switch 101 in the sensing device 1 rolls to the initial position, the sensing switch 101 is in the closed state, the IO collecting port of the main control module 103 collects the switching value signal of the sensing switch 101 and sends it out through the wireless sending module 104 and the rf antenna 105, the external acquisition equipment acquires that the inductive switch 101 is in a closed state, which indicates that the hard pressing plate is in a switching state. The switching state of the hard pressing plate is sensed through the inductive switch 101, so that a signal is sent out, the state of the hard pressing plate is convenient to monitor, and the switching state of the hard pressing plate does not need to be observed and recorded manually.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (14)

1. A relay protection soft and hard pressing plate integrated online monitoring system is characterized by comprising a pressing plate position sensor, a data acquisition terminal and an online patrol intelligent early warning module, wherein the data acquisition terminal acquires the position of a breaker, the position of a soft pressing plate and the position of a disconnecting link in a relay protection device in a communication mode, the data acquisition terminal acquires the position of the hard pressing plate through the pressing plate position sensor, and the online patrol intelligent early warning module receives information acquired by the data acquisition terminal in real time;
the online patrol intelligent early warning module reads a primary and secondary equipment state corresponding instantiation file, the primary and secondary equipment state corresponding instantiation file defines the corresponding breaker position and the corresponding disconnecting link position of primary equipment under different operation states, the soft pressing plate and hard pressing plate switching rule matrix under different operation states of different types of relay protection devices are defined, the corresponding relay protection operation states of the primary equipment under different operation states are defined, the online patrol intelligent early warning module identifies the current operation state of the primary equipment through the collected real-time data of the breaker and the disconnecting link, and identifies the current operation state of the relay protection device through the collected real-time data of the soft pressing plate and the hard pressing plate; and identifying the target state of the relay protection device through the running state of the primary equipment, comparing the current running state of the relay protection device with the target state of the relay protection device in real time, and giving an alarm if the running state is inconsistent with the target state.
2. The relay protection soft and hard pressure plate integrated online monitoring system according to claim 1, further comprising a configuration tool, wherein the configuration tool is configured to construct a total station primary and secondary equipment model and define corresponding breaker positions and disconnecting link positions in different operating states of the primary equipment, soft pressure plate and hard pressure plate switching rule matrices in different operating states of different types of relay protection devices, and corresponding relay protection operating states in different operating states of the primary equipment to generate a corresponding instantiation file of the secondary equipment state.
3. The relay protection soft-hard pressing plate integrated online monitoring system according to claim 2, characterized by further comprising an upper computer for preview of switching operation and logic verification, wherein the upper computer applies for a target state of the relay protection device to the online patrol intelligent early warning module, the online patrol intelligent early warning module returns a list corresponding to the breaker, the disconnecting link, the soft pressing plate and the hard pressing plate to be switched according to the target state of the relay protection device and a corresponding instantiation file of a primary and secondary equipment state, an operator performs switching operation according to the list, the online patrol intelligent early warning module monitors the whole process and verifies whether switching operation is wrong, if so, the alarm is given, and the upper computer receives alarm information in real time.
4. The relay protection soft-hard pressing plate integrated online monitoring system according to claim 1, wherein the data acquisition terminal is in communication connection with a relay protection device through an IEC61850 protocol and acquires a breaker position, a soft pressing plate position and a disconnecting link position in the relay protection device.
5. The relay protection soft-hard pressing plate integrated online monitoring system according to claim 1, wherein each pressing plate position sensor receives a time synchronization request of a data acquisition terminal after being powered on, synchronizes the time of the pressing plate position sensor, and requests the time of the data acquisition terminal again after the pressing plate position sensor transmits data to the data acquisition terminal after running for a preset time.
6. The relay protection soft-hard pressure plate integrated online monitoring system according to claim 1, wherein each pressure plate position sensor wakes up sequentially at equal time intervals in a wake-up period, and the wake-up time of the pressure plate position sensor corresponding to each hard pressure plate is T-T0+TIxN, wherein, T0Indicating the wake-up period, TIIndicating equal time intervals and N indicates the current intra-group number of the hard platen.
7. The relay protection soft and hard pressing plate integrated online monitoring system according to claim 1, wherein the pressing plate position sensor comprises an induction device, an induction switch, a power supply, a main control module, a wireless transmission module and a radio frequency antenna are packaged in a shell of the induction device, the power supply supplies power to the induction switch, the main control module and the wireless transmission module, an IO acquisition port of the main control module is connected with a switching value signal output end of the induction switch, a data transmission port of the main control module is connected with a data receiving port of the wireless transmission module, and a data transmission port of the wireless transmission module is connected with the radio frequency antenna.
8. The relay protection soft and hard pressing plate integrated online monitoring system according to claim 7, wherein the inductive switch is a micro switch, the hard pressing plate comprises a connecting piece type knob for controlling the switching state of the hard pressing plate, a first fixing member for fixing the hard pressing plate on external equipment, and a first binding post for connecting the hard pressing plate with a relay protection secondary circuit, the inductive device is fixedly installed on the side surface of the first fixing member, the connecting piece type knob is rotatably connected above the first fixing member, and the first binding post is installed below the first fixing member.
9. The relay protection soft and hard pressure plate integrated online monitoring system according to claim 8, wherein the first fixing member comprises two hollow cylinders which are arranged in bilateral symmetry, the two hollow cylinders are fixedly connected through a connecting plate, and the bottoms of the two hollow cylinders are respectively connected with a first bolt which is provided with an external thread and is hollow inside; the side surfaces of the two hollow cylinders and the side surface of the connecting plate are fixedly connected with the side surface of the shell of the induction device;
the connecting piece type knob comprises a contact piece, the left side and the right side of the contact piece are provided with hooks, the middle of the contact piece is provided with a rectangular plate, the directions of the hooks on the left side and the right side of the contact piece are opposite, the hooks on the two sides of the contact piece are respectively positioned above the two hollow cylinders, hook eyes of the hooks face the hollow parts of the hollow cylinders, the middle of the rectangular plate is clamped with a fixture block, the fixture block is insulated, and the side surface of the fixture block faces the contact of the induction switch;
the number of the first binding posts is two, the hollow part of each first bolt is correspondingly provided with one first binding post, and the first binding posts sequentially penetrate through the hooks on the contact pieces, the hollow parts of the hollow cylinders of the first fixing pieces and the hollow parts of the first bolts below the first fixing pieces and are fixedly connected with the first fixing pieces; and the two first binding posts are connected into a relay protection secondary circuit.
10. The relay protection soft-hard pressing plate integrated online monitoring system according to claim 7, wherein the inductive switch is a ball switch, the hard pressing plate comprises a plugging knob for controlling the switching state of the hard pressing plate, a second fixing member for fixing the hard pressing plate on external equipment, and a second binding post for connecting the hard pressing plate with the relay protection secondary circuit, and the inductive device is installed above the plugging knob and moves along with the plugging knob.
11. The relay protection soft-hard pressing plate integrated online monitoring system according to claim 10, wherein a first through hole is formed downwards in the center of the second fixing member in the length direction, a limiting device is mounted on the second fixing member below the first through hole, and the limiting device is a hollow cylinder; and the second fixing piece is provided with second through holes at the left side and the right side of the first through hole respectively, and a second bolt which is provided with an external thread and is internally provided with a regular hexagon hollow is arranged at the position below the second through hole on the second fixing piece.
12. The relay protection soft-hard pressing plate integrated online monitoring system according to claim 11, wherein the plugging knob comprises a main body structure matched with the second fixing piece in shape and size, the sensing device is installed above the main body structure of the plugging knob through a double-sided adhesive tape, a pull rod is vertically installed downwards in the center of the main body structure, a spring is sleeved outside the pull rod, a fixing bolt is sleeved on the end portion of the pull rod, screw holes with the same diameter are longitudinally formed in the end portion of the pull rod and the fixing bolt, and a screw penetrates through the screw hole in one side of the fixing bolt and then penetrates through the screw hole in the end portion of the pull rod and the screw hole in the other side of the fixing bolt to be locked; the main structure is provided with a guide rod at each of two sides of the pull rod, and the two guide rods are electrically connected at one side of the main structure.
13. The relay protection soft and hard pressure plate integrated online monitoring system according to claim 12, wherein the second terminal comprises a screw, a long rod having an internal thread and being in threaded connection with the screw, and the outer side shape of the long rod is matched with the shape of a regular hexagonal hollow part of the second bolt below the second fixing member; the pull rod is located in the limiting device, the spring is located in a gap between the limiting device and the pull rod, guide rods on the left side and the right side of a main structure of the plugging knob are respectively installed in the two second through holes of the second fixing piece, the long rod of the second wiring terminal penetrates through the regular hexagon hollow portion of the second bolt below the second fixing piece from bottom to top, and in an initial state, screws in the second wiring terminal are in contact with the guide rods.
14. The relay protection soft and hard pressing plate integrated online monitoring system according to claim 1, wherein the data acquisition terminal comprises a control circuit, a power circuit, a wireless communication circuit, an Ethernet communication circuit and a plurality of 485 serial port communication circuits, the wireless communication circuit, the Ethernet communication circuit and the power circuit are all connected with the control circuit, the control circuit receives signals of the sensing sensors in the transformer substation through the wireless communication circuit, and the control circuit is in communication connection with the online patrol intelligent early warning module through the 485 serial port communication circuit and the Ethernet communication circuit.
CN202111081620.9A 2021-09-15 2021-09-15 Relay protection soft and hard clamp plate integrated online monitoring system Active CN113937724B (en)

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CN202210444535.2A CN114825256A (en) 2021-09-15 2021-09-15 Integrated online monitoring system of connected hard pressing plate
CN202210444796.4A CN114977075A (en) 2021-09-15 2021-09-15 Relay protection soft and hard clamp plate integrated online monitoring system
CN202111081620.9A CN113937724B (en) 2021-09-15 2021-09-15 Relay protection soft and hard clamp plate integrated online monitoring system

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