CN108347041B - Building block type on-site busbar protection device for container - Google Patents
Building block type on-site busbar protection device for container Download PDFInfo
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- CN108347041B CN108347041B CN201810422197.6A CN201810422197A CN108347041B CN 108347041 B CN108347041 B CN 108347041B CN 201810422197 A CN201810422197 A CN 201810422197A CN 108347041 B CN108347041 B CN 108347041B
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- 238000004891 communication Methods 0.000 claims description 47
- 238000005070 sampling Methods 0.000 claims description 19
- 239000013307 optical fiber Substances 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 12
- 241000272814 Anser sp. Species 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 claims description 10
- 238000011065 in-situ storage Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 230000006855 networking Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 8
- 230000001681 protective effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- 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
- H02J13/00019—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 optical means
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/14—Protecting elements, switches, relays or circuit breakers
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- 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
- Y04S40/126—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 wireless data transmission
Abstract
A modular on-site busbar protection device for a container relates to the field of on-site protection devices for power systems. At present, the on-site bus protection device has the advantages of large quantity, large space occupation, complex structure and high cost. The invention comprises a host device and a plurality of sub-machine devices, wherein the sub-machine devices are assembled with corresponding elements for connecting a plurality of branches in a container mode, the host device and the sub-machine devices are connected in a building block mode, and the access interfaces of the host device and the sub-machine devices are inserted by aviation; the host device is responsible for collecting the current quantity, the voltage quantity and the switching value of part of the branches and accessing the tripping outlet of the branches; the slave device is an extension of the host device and is responsible for collecting the current quantity, the voltage quantity and the switching value of the accessed corresponding branch and tripping the corresponding branch. The technical scheme has simple structure, convenient installation and small occupied space; the access interface adopts aviation plug, and the protective capability is high.
Description
Technical Field
The invention relates to the field of on-site protection devices of power systems, in particular to a building block type on-site bus protection device of a container.
Background
According to the construction planning of the transformer substation of the national network company and the professional management requirement of the national center for secondary protection control equipment of the intelligent transformer substation, the newly built transformer substation in 2016 years and later is completely carried out according to the intelligent transformer substation mode, and more than 50% adopts a new generation intelligent transformer substation mode, wherein the 220kV and below protection control device needs to realize an on-site and miniaturized non-protection installation mode.
The relay protection device is installed close to the primary equipment in an on-site manner, the arrangement of screen positions of a main control room can be reduced by the popularization of on-site protection, the cable connection is greatly reduced, the relay protection device is communicated with the main control room through optical fiber communication, information is exchanged and commands are received, a secondary loop is simplified, and the operation reliability of the device is improved. After in-situ installation, the influence of electromagnetic interference, temperature, vibration impact and the like is closer to an interference source, so that the electromagnetic interference is strong, the vibration amplitude is large, and a good temperature control environment is lacked, so that the influence degree of the electromagnetic interference, the temperature, the vibration impact and the like is greatly over the influence on the operation of a protection device under the protection of a conventional relay protection cell. On one hand, the testing grade of electromagnetic interference, temperature, vibration impact and the like of the on-site protection device is improved, and on the other hand, the running parameters of the device such as environment, resources and the like are monitored in real time, so that the abnormality can be found in time.
The on-site line protection device is single-interval protection equipment, one line protection device is placed at each section at two ends of a line, but the inter-interval protection equipment such as bus protection and transformer protection relates to the access of more branch analog quantities, the deployment mode of the on-site protection device is different from the access mode of the line protection for each branch or each side analog quantity.
According to the characteristics of the transformer, the on-site transformer protection is realized by adopting a mode of arranging on-site transformer protection sub-machines according to sides, all sub-machine hand handles are looped together to be sent to a host machine, the host machine is placed on a transformer body, the transformer protection function is realized by the host machine, and the action behavior of the host machine device is executed by the sub-machine device.
The bus is connected with a plurality of outgoing branches, in an extreme case, 24 branches are connected with a 220kV bus, and if each branch is provided with a sub-machine device and then is provided with a host machine device, the bus protection device system is huge. Therefore, how to reduce the number of devices, reduce space occupation, simplify the mounting structure, and enhance the protection capability of the interface, and reduce cost is an important issue.
Disclosure of Invention
The invention aims to solve the technical problems and provide the technical task of perfecting and improving the prior art scheme, and provides the container building block type on-site bus protection device, aiming at simplifying the installation structure and enhancing the interface protection capability. For this purpose, the present invention adopts the following technical scheme.
The modular on-site bus protection device for the container comprises a host device and a plurality of sub-machine devices, wherein the sub-machine devices are assembled with corresponding elements for connecting a plurality of branches in a container mode, the host device and the sub-machine devices are connected in a building block building mode, and the access interfaces of the host device and the sub-machine devices are inserted in an aviation mode; the host device is responsible for collecting the current quantity, the voltage quantity and the switching value of part of the branches and accessing the tripping outlet of the branches, and completing the branch electric quantity collection function, the differential current calculation function, the brake current calculation function, the analog calculation function, the remote operation interface function, the protection function logic, the man-machine interface function, the process layer input and output function and the station control layer communication interface function; the slave device is an extension of the host device and is responsible for the collection of the current quantity, the voltage quantity and the switching value of the corresponding branch circuit accessed by the slave device and the tripping function of the corresponding branch circuit. The functions of the on-site bus protection device are realized through the host device and the plurality of sub-machine devices, the sub-machine devices are used for carrying out container packaging on corresponding elements of the plurality of branches in a container mode, and the host device and the sub-machine devices are connected in a building block building mode, so that the installation structure is simplified, the occupied space is reduced, and the installation is convenient and quick; the access interfaces of the main machine device and the sub-machine device are all aviation plug, so that the protection capability is effectively improved.
As a further improvement and supplement to the above-mentioned technical solutions, the present invention also includes the following additional technical features.
The host device and each sub-machine device are electrically connected in parallel to connect the sub-machine devices at the same time, the sub-machine device is arranged at the bottom of the building block structure, and the host device is arranged at the top layer of the building block structure. The host device contacts all the sub-machine devices at the same time, the functional interference between the sub-machine devices can not occur, when one sub-machine device fails, the contact between other sub-machine devices and the host device can not be influenced, and the host device is arranged on the top layer of the building block structure, so that the maintenance is convenient.
The host device and the sub-device are connected through a special communication link to realize parallel transmission of electric analog quantity and switching value, and the special transmission link is an optical fiber packaged in an aviation plug. The interference is avoided through the special communication link, so that the communication between the host device and the sub-device is stable and reliable, the electromagnetic interference is avoided through optical fiber transmission, and the stability is better.
The main machine device and the sub-machine device are respectively provided with 5 groups of aviation plug, namely strong electric aviation plug, outlet aviation plug, communication aviation plug, first analog aviation plug and second analog aviation plug. Grouping and specialization of aviation plug are realized, interface standards are unified, interference between strong and weak electricity is greatly reduced, and signals are more stable.
The strong current aviation plug of the host device comprises an opening and closing part for providing a working power supply of the device and accessing a certain number of branches, wherein the opening and closing part comprises a bus-bar circuit breaker position, a bus-bar hand-opening and closing position and a branch bus disconnecting link position; the strong current aviation plug of each sub-machine device comprises a working power supply for providing the device and a knife switch position of a connected branch. All strong electric connections of the host device and the sub-device can be conveniently realized.
The number of the sub-machine devices is 3, and each sub-machine device is connected with 8 branches. Through 3 sub-machine devices and every sub-machine device connection 8 sub-ways, can adapt to the condition that 24 branches are connected to the generating line effectively, the suitability is good.
The communication aviation plug of the host device comprises at least 21 optical fibers and corresponding plug ports thereof, wherein the communication aviation plug comprises a pair of process layer GOOSE networking ports, a pair of time synchronization interfaces, two pairs of station control layer communication interfaces, a pair of debugging ports and 6 group extension communication interfaces; the slave unit is provided with a pair of debugging ports and an extended communication interface. Various communication interface functions can be perfectly realized.
Under the three-half wiring mode, the first analog quantity aviation plug of the host device is responsible for collecting 4 strings of current analog quantity, under the non-three-half wiring mode, the first analog quantity aviation plug of the host device is responsible for collecting the voltage of at most 3 sections of buses and the current analog quantity of 1 branch, and the second analog quantity aviation plug of the host device is responsible for collecting the current analog quantity of 4 branches; the first analog quantity aviation plug and the second analog quantity aviation plug of the sub-machine device collect current analog quantities of 8 branches in total. And the acquisition of the current analog quantity is conveniently realized.
The system comprises a main machine device, a sub-machine device, a pulse-per-second sampling synchronization system and a pulse-per-second sampling synchronization system, wherein the pulse-per-second sampling synchronization system is arranged between the main machine device and the sub-machine device and comprises a pulse-per-second synchronization signal generator arranged on the main machine device and a pulse-per-second synchronization signal receiver arranged on the sub-machine device, and the sub-machine device processes analog quantity sampling of an access branch on the sub-machine device after receiving the pulse-per-second synchronization signal of the pulse-per-second synchronization signal generator. The sampling synchronization is conveniently realized.
The host device is provided with a monitoring protection module for monitoring each special communication link and providing locking protection when the special communication link is abnormal. The safety monitoring and abnormal locking protection of the communication link can be effectively realized.
The outlet aviation plug of the main machine device and the sub machine device comprises an A\B\C split-phase tripping outlet of 8 branches, and the total number of the outlets is 32. The 8 branch circuits A\B\C split-phase tripping outlet can be completely realized.
The host device and the sub-device all adopt armored cables or armored optical fibers for external input and output. The armored cable or the armored optical fiber has good shielding effect and safer protection.
The data exchange between the host device and the sub-device is carried out in a two-way mode, the data exchange content is transmitted in a common-port parallel mode, the message format is SV and GOOSE data based on 61850 transmission protocol, the uplink analog quantity and the switching value are collected, and the downlink tripping exit command is issued.
The beneficial effects are that:
1. the functions of the on-site bus protection device are realized through the host device and the plurality of sub-machine devices, the sub-machine devices are used for carrying out packaging on corresponding elements of the plurality of branches in a container mode, and the host device and the sub-machine devices are connected in a building block building mode, so that the installation structure is simplified, the occupied space is reduced, the installation is convenient and quick, and the operation and maintenance efficiency is improved by reducing the number of equipment to be maintained.
2. Through adopting the avionics, armor cable or armor optic fibre, promoted the protective capability effectively.
3. The container building block type host device and the sub-machine device are deployed in a switch yard through reasonable optimization, and the outgoing line branch on the bus is connected with the sub-machine nearby, so that the problem that a secondary loop is concentrated to one point through a cable pit is avoided.
4. The host device and each sub-machine device are electrically connected in parallel, the host device is arranged on the top layer of the building block structure, the host device is convenient to contact with each sub-machine device at the same time, functional interference between the sub-machine devices can not occur, when one sub-machine device fails, contact between other sub-machine devices and the host device can not be influenced, and maintenance is convenient.
5. The host device and the sub-device are connected through special communication links by optical fibers, so that the communication is stable and reliable, and electromagnetic interference is avoided.
6. The interference between strong and weak electricity is greatly reduced by grouping aviation plug according to purposes and specializing unified interface standards, so that signals are more stable; various special aviation plug packets can perfectly realize various interface functions.
7. Through 3 sub-machine devices and each sub-machine device connect 8 sub-ways, can adapt to the condition that 24 branches are connected to the generating line under the extreme condition effectively, the suitability is good.
8. The sampling synchronization system can conveniently realize sampling synchronization.
Drawings
FIG. 1 is a schematic diagram of the connection between a host device and a slave device according to the present invention.
FIG. 2 is a schematic diagram of the connection of a branch circuit to a bus bar according to the present invention.
Fig. 3 is a schematic diagram of a pulse-per-second sampling synchronization system of the present invention.
Fig. 4 is a view of the definition of the air interface of the present invention.
In the figure: 1-a host device; 2-a sub-machine device; a 3-second pulse synchronous signal generator; a 4-second pulse synchronous signal receiver; 5-strong current aviation plug; 6-outlet aerial insertion; 7-communication aviation plug; 8-first analog quantity aviation plug; 9-second analog quantity aviation plug.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings.
As shown in fig. 1-4, a modular on-site busbar protection device for a container comprises a main unit device 1 and 3 sub-unit devices 2, wherein the sub-unit devices 2 are respectively assembled with corresponding elements for connecting 8 branches in a container mode, the main unit device 1 and the sub-unit devices 2 are connected in a building block mode, the access interfaces of the main unit device 1 and the sub-unit devices 2 are respectively inserted by aviation, and in a switch yard, an outgoing line branch on the busbar is nearby connected with the sub-unit devices 2; the host device 1 is responsible for the voltage quantity input of three bus voltages, the collection of the current quantity, the voltage quantity and the switching value of 5 branches and the trip outlet of an access branch, and completes the branch electric quantity collection function, the differential current calculation function, the brake current calculation function, the analog calculation function, the remote operation interface function, the protection function logic, the man-machine interface function, the process layer input and output function and the station control layer communication interface function, and the host device 1 is a function centralized system for the in-situ bus protection; the sub-machine device 2 is an extension of the host machine device 1, the sub-machine device 2 cannot work independently, and is required to be attached to the host machine and is responsible for the collection of the current quantity, the voltage quantity and the switching value of the corresponding branch circuit which is connected with the sub-machine device and the tripping and opening function of the corresponding branch circuit, and each sub-machine is connected with 8 branch circuits.
For ease of maintenance, there is a parallel electrical connection between the host device 1 and each of the sub-devices 2 to simultaneously contact each of the sub-devices 2, with the sub-device 2 at the bottom of the building block and the host device 1 at the top of the building block. The host device 1 contacts each sub-machine device 2 at the same time, the functional interference between the sub-machine devices 2 can not occur, when one sub-machine device 2 fails, the contact between other sub-machine devices 2 and the host device 1 can not be influenced, the maintenance is convenient, and the maintenance is more convenient by arranging the host device 1 on the top layer of the building block structure.
In order to make the communication stable and reliable, the host device 1 and the slave device 2 are connected through a special communication link to realize parallel transmission of electric analog quantity and switching value, and the special transmission link is an optical fiber packaged in an aviation plug. The interference is avoided through the special communication link, so that the communication between the host device 1 and the slave device 2 is stable and reliable, and the optical fiber transmission is free from electromagnetic interference and has better stability.
In order to reduce mutual interference, the main unit device 1 and the sub unit device 2 are respectively provided with 5 groups of aviation sockets, namely, a strong electric aviation socket 5, an outlet aviation socket 6, a communication aviation socket 7, a first analog aviation socket 8 and a second analog aviation socket 9. Grouping and specialization of aviation plug are realized, interface standards are unified, interference between strong and weak electricity is greatly reduced, and signals are more stable.
In order to realize comprehensive strong electric connection, the strong electric aviation plug 5 of the host device 1 comprises a 220V power supply of the providing device and the opening of strong electric branches of each direct current, wherein the opening comprises a bus-bar circuit breaker position, a bus-bar hand-opening position and 8 branch bus disconnecting link positions; the high-voltage aerial plug 5 of each slave unit 2 comprises a 220V power supply for the supply unit and the knife switch position of the connected branch. All the strong electrical connections of the host device 1 and the slave device 2 can be conveniently realized.
In order to realize various communication interface functions, the communication aviation plug 7 of the host device 1 comprises at least 21 optical fibers and corresponding plug ports thereof, wherein the communication aviation plug comprises a pair of process layer GOOSE networking ports, a pair of time synchronization interfaces, two pairs of station control layer communication interfaces, a pair of debugging ports and 6 pairs of device expansion communication interfaces; the slave unit 2 is provided with a pair of debug ports and an extended communication interface. Various communication interface functions can be perfectly realized.
In order to conveniently realize current analog quantity collection, a first analog quantity aviation plug 8 of the host device 1 is responsible for collecting 4 strings of current analog quantities in a three-half wiring mode, and a first analog quantity aviation plug 8 of the host device 1 is responsible for collecting the voltage of at most 3 sections of buses and the current analog quantity of 1 branch circuit in a non-three-half wiring mode, and a second analog quantity aviation plug 9 of the host device 1 is responsible for collecting the current analog quantities of 4 branch circuits; the first analog quantity aviation plug 8 and the second analog quantity aviation plug 9 of the slave unit device 2 collect current analog quantities of 8 branches in total. The acquisition of current analog quantity is conveniently realized, and the analog quantity schematic of each aviation plug is shown in the following table:
in order to realize sampling synchronization, a sampling synchronization system is arranged between the host device 1 and the sub-machine device 2, and comprises a second pulse synchronous signal generator 3 arranged on the host device 1 and a second pulse synchronous signal receiver 4 arranged on the sub-machine device 2, wherein the sub-machine device 2 processes analog quantity sampling of a branch circuit connected to the sub-machine device 2 after receiving the second pulse synchronous signal of the second pulse synchronous signal generator 3. The sampling synchronization is conveniently realized.
In order to effectively realize security monitoring and abnormality protection, the host device 1 is provided with a monitoring protection module that monitors each dedicated communication link and provides lock protection when the dedicated communication link is abnormal. The host device 1 monitors the link state between the host device 1 and the slave device 2 in real time, prevents the occurrence of differential protection malfunction due to the occurrence of differential current caused by the analog quantity deficiency when the link is interrupted, and can effectively realize the safety monitoring and abnormal locking protection of the communication link.
In order to completely realize the phase-splitting trip outlets of the 8 branches A\B\C, the outlet aviation plug 6 of the host device 1 and the slave device 2 comprises the phase-splitting trip outlets of the 8 branches A\B\C, and the total number of the phase-splitting trip outlets is 32. The 8 branch circuits A\B\C split-phase tripping outlet can be completely realized.
In order to make the protective shielding effect better, the host device 1 and the slave device 2 all adopt armored cables or armored optical fibers for external input and output. The armored cable or the armored optical fiber has good shielding effect and safer protection.
In order to realize bidirectional information transmission, the data exchange mode between the host device 1 and the sub-device 2 is SV and GOOSE bidirectional common-port parallel transmission, and SV and GOOSE transmission protocols are 61850-9-2 protocols; the host device 1 transmits a tripping command based on a GOOSE message format to the sub-machine device 2 through a device expansion communication interface, the tripping command is converted into a tripping outlet command in the form of a relay contact by the sub-machine device 2 after being transmitted to the sub-machine device 2, and the tripping outlet command is transmitted to a cable through the cable to be transmitted to an on-site operation box; the sub-machine device 2 transmits a branch current sampling message based on an SV format and a branch knife switch position based on a GOOSE format to the host machine device 1, wherein the SV sampling message is 24-point sampling, and the SV sampling message is directly used for differential stream calculation of differential protection after being transmitted to the host machine device 1; the slave device 2 transmits to the host device 1 a GOOSE message at a knife switch position of each access branch, which is transmitted to the host device 1 by using the same optical fiber as the SV message, and the host device 1 processes the SV and GOOSE messages according to the synchronization pulse and the received sampling sequence number, and when receiving the message, the host device 1 processes the SV message with a higher priority than the GOOSE message. And the bidirectional information transmission is conveniently realized.
In the embodiment, the aviation plug adopts standard port definition, and the connection mode with the protection device is a threaded connection mode for fixing the fixed port; the strong current aviation plug 5 is a 24-core opening-in + power interface, the outlet aviation plug 6 is a 32-core opening-out interface, the communication aviation plug 7 is a 21-core optical fiber interface, and the first analog aviation plug 8 and the second analog aviation plug 9 are 24-core alternating current interfaces.
In addition, the number of the sub-units 2 is determined according to the number of branches connected to the bus in the engineering design of the substation, and in order to meet the engineering requirements of 36 branches or higher which may occur in the 66kV or 35kV bus engineering, the number of the sub-units 2 may reach or exceed 4.
The above-mentioned building block type on-site bus protection device for container shown in fig. 1-4 is a specific embodiment of the present invention, has already demonstrated the substantial characteristics and improvements of the present invention, and can be modified in terms of shape, structure, etc. according to practical use requirements, under the teaching of the present invention, all of which are within the scope of protection of the present invention.
Claims (7)
1. A modular on-site busbar protection device for a container is characterized in that: the intelligent remote control system comprises a host device (1) and a plurality of sub-machine devices (2), wherein the sub-machine devices (2) are respectively assembled with corresponding elements for connecting a plurality of branches in a container mode, the host device (1) and the sub-machine devices (2) are connected in a building block building mode, and the access interfaces of the host device (1) and the sub-machine devices (2) are respectively in aviation plug; the host device (1) is responsible for collecting the current quantity, the voltage quantity and the switching value of part of the branches and accessing the tripping outlet of the branches, and completing the branch electric quantity collection function, the differential current calculation function, the brake current calculation function, the analog calculation function, the remote operation interface function, the protection function logic, the man-machine interface function, the process layer input and output function and the station control layer communication interface function; the sub-machine device (2) is an extension of the host machine device (1) and is responsible for collecting the current quantity, the voltage quantity and the switching value of the corresponding branch circuit which is accessed by the main machine device and the tripping function of the corresponding branch circuit;
the main machine device (1) and the sub-machine device (2) are respectively provided with 5 groups of aviation plug, namely a strong current aviation plug (5), an outlet aviation plug (6), a communication aviation plug (7), a first analog aviation plug (8) and a second analog aviation plug (9);
the communication aviation plug (7) of the host device (1) comprises at least 21 optical fibers and corresponding plug ports thereof, wherein the communication aviation plug comprises a pair of process layer GOOSE networking ports, a pair of time synchronization interfaces, two pairs of station control layer communication interfaces, a pair of debugging ports and 6 pairs of device expansion communication interfaces; the slave machine device (2) is configured with a pair of debugging ports and an expansion communication interface;
under the three-half wiring mode, the first analog quantity aviation plug (8) of the host device (1) is responsible for collecting 4 strings of current analog quantity, under the non-three-half wiring mode, the first analog quantity aviation plug (8) of the host device (1) is responsible for collecting the voltage of at most 3 sections of buses and the current analog quantity of 1 branch, and the second analog quantity aviation plug (9) of the host device (1) is responsible for collecting the current analog quantity of 4 branches; the first analog quantity aviation plug (8) and the second analog quantity aviation plug (9) of the sub-machine device (2) collect current analog quantities of 8 branches altogether.
2. A modular in-situ busbar protection for a container as set forth in claim 1, wherein: the host device (1) and each sub-machine device (2) are electrically connected in parallel to simultaneously connect the sub-machine devices (2), the sub-machine devices (2) are arranged at the bottom of the building block structure, and the host device (1) is arranged at the top layer of the building block structure.
3. A modular in-situ busbar protection for a container as set forth in claim 1, wherein: the host device (1) and the slave device (2) are connected through a special communication link to realize parallel transmission of electric analog quantity and switching value, and the special communication link is an optical fiber packaged in an aviation plug.
4. A modular in-situ busbar protection for a container as set forth in claim 1, wherein: the strong current aviation plug (5) of the host device (1) comprises an opening and closing part for providing a working power supply of the device and accessing a corresponding number of branches, wherein the opening and closing part comprises a bus-bar circuit breaker position, a bus-bar manual opening and closing position and a branch bus disconnecting link position; the high-power aviation plug (5) of each sub-machine device (2) comprises a working power supply for providing the device and a knife switch position of a connected branch.
5. A modular in-situ busbar protection for a container as set forth in claim 1, wherein: the number of the sub-machine devices (2) is 3, and each sub-machine device (2) is connected with 8 branches.
6. A modular in-situ busbar protection for a container as set forth in claim 1, wherein: the system is characterized in that a sampling synchronization system is arranged between the host device (1) and the sub-machine device (2), and comprises a second pulse synchronous signal generator (3) arranged on the host device (1) and a second pulse synchronous signal receiver (4) arranged on the sub-machine device (2), and the sub-machine device (2) processes analog quantity sampling of an access branch on the sub-machine device (2) after receiving the second pulse synchronous signal of the second pulse synchronous signal generator (3).
7. A modular in-situ busbar protection for a container as set forth in claim 1, wherein: a monitoring protection module for monitoring each dedicated communication link and providing lock protection when the dedicated communication link is abnormal is provided on the host device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422197.6A CN108347041B (en) | 2018-05-04 | 2018-05-04 | Building block type on-site busbar protection device for container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422197.6A CN108347041B (en) | 2018-05-04 | 2018-05-04 | Building block type on-site busbar protection device for container |
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| Publication Number | Publication Date |
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| CN108347041A CN108347041A (en) | 2018-07-31 |
| CN108347041B true CN108347041B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810422197.6A Active CN108347041B (en) | 2018-05-04 | 2018-05-04 | Building block type on-site busbar protection device for container |
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| CN108347041A (en) | 2018-07-31 |
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