CN112510660B - Comprehensive measurement and control protection device with bus differential protection function - Google Patents
Comprehensive measurement and control protection device with bus differential protection function Download PDFInfo
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- CN112510660B CN112510660B CN202011363867.5A CN202011363867A CN112510660B CN 112510660 B CN112510660 B CN 112510660B CN 202011363867 A CN202011363867 A CN 202011363867A CN 112510660 B CN112510660 B CN 112510660B
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- 238000005259 measurement Methods 0.000 title claims abstract description 20
- 239000013307 optical fiber Substances 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 25
- 238000005070 sampling Methods 0.000 claims description 22
- 230000006870 function Effects 0.000 claims description 20
- 230000001360 synchronised effect Effects 0.000 claims description 18
- 238000012937 correction Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 241000723353 Chrysanthemum Species 0.000 description 1
- 235000005633 Chrysanthemum balsamita Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012546 transfer 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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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
- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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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
- H02J13/00016—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
- H02J13/00017—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 using optical fiber
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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
- H02J13/00032—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
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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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
- Y04S40/124—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)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a comprehensive measurement and control protection device with a bus differential protection function. The device comprises a plurality of differential protection device circuits; each differential protection device circuit comprises a first differential transceiver and a second differential transceiver; wherein, one of the master differential protection device circuits is a master computer, and the master differential protection device circuits except the master computer are slaves; the data transmitting end of the first differential transceiver of the host is connected with the data receiving end of the second differential transceiver of the slave; the data transmitting end of the second differential transceiver of one slave machine is connected with the data receiving end of the second differential transceiver of the other slave machine; the data receiving end of the second differential transceiver of the host is connected with the data transmitting end of the first differential transceiver of the slave, and the data receiving end of the first differential transceiver of the slave is connected with the data transmitting end of the first differential transceiver of the other slave; the invention can realize the conventional protection function and the distributed bus differential protection function.
Description
Technical Field
The invention relates to the field of electronic information, in particular to a comprehensive measurement and control protection device with a bus differential protection function.
Background
A bus differential protection device is arranged in a microcomputer comprehensive measurement and control protection device in an electric power system and is used for realizing bus short-circuit protection, and the bus differential protection device is specifically as follows: the two-in four-out ring main units are used as columns, and the two-in switches and the 4-out switches are respectively provided with a microcomputer comprehensive protection measurement and control unit, so that the conventional protection function of the switch is realized. The bus protection of the ring main unit is realized by bus differential protection, so that 1 bus differential protection device is required to be additionally arranged, and the current loop of each line-in and line-out switch is connected with the microcomputer comprehensive protection measurement and control unit and the bus differential protection device. Disadvantages: 1) 1 busbar differential protection device is required to be configured independently; 2. the current of all loops on the bus is connected to the microcomputer comprehensive protection measurement and control unit and the bus differential protection device simultaneously, so that the cost is increased and the wiring is complex. 3. The bus differential protection device requires that the current of a plurality of loops is collected simultaneously, the number of collection channels is large, the cost is high, and the volume is large.
Disclosure of Invention
The invention aims to provide a comprehensive measurement and control protection device with a bus differential protection function, which realizes a conventional protection function and a distributed bus differential protection function.
In order to achieve the above object, the present invention provides the following solutions:
A comprehensive measurement and control protection device with a bus differential protection function comprises: a plurality of differential protection device circuits; each of the differential bus protection device circuits includes a first differential transceiver and a second differential transceiver;
The bus differential protection device circuit is arranged in a switch protection device of an incoming line and an outgoing line of a bus; wherein, one of the master differential protection device circuits is a master, and the master differential protection device circuits except the master are slaves;
The data transmitting end of the first differential transceiver of the host is connected with the data receiving end of the second differential transceiver of the slave, and the data transmitting end of the second differential transceiver of the slave is connected with the data receiving end of the second differential transceiver of the other slave to form a first optical fiber communication daisy chain; the data transmitting end of the first differential transceiver of the slave is connected with the data receiving end of the first differential transceiver of the other slave, and the data transmitting end of the first differential transceiver of the slave is connected with the data receiving end of the second differential transceiver of the host to form a second optical fiber communication daisy chain;
The host computer sends a synchronous instruction and a synchronous pulse, a correction instruction and a correction pulse to the slave computer through a first optical fiber communication daisy chain, so that the host computer and the slave computer keep sampling synchronization; the host computer also issues differential protection action commands for the bus through a first fiber communication daisy-chain. When a bus fails, a tripping command is sent to trip the switch monitored by the host, and simultaneously, a broadcasting tripping command is issued to all the slaves in the daisy chain network through a first optical fiber communication daisy chain to trip the switch monitored by all the slaves;
The host receives sampling data of all the slaves in the daisy chain network through a second optical fiber communication daisy chain, and performs bus differential current calculation with the sampling data of the host to complete bus differential protection logic judgment;
The second differential transceiver of the slave is used for receiving a synchronous instruction and a synchronous pulse, so that the sampling of the slave is synchronous with the host; the second differential transceiver of the slave is also used for receiving a tripping instruction of the master to trip the switch monitored by the slave;
The data receiving end of the second differential transceiver of the host is connected with the data transmitting end of the first differential transceiver of the slave, and the data receiving end of the first differential transceiver of the slave is connected with the data transmitting end of the first differential transceiver of the other slave;
the second differential transceiver of the host is used for receiving the sampling data of each slave;
The first differential transceiver of the slave is used for sending the sampling data of the slave to the host.
Optionally, the first differential transceiver is an 84M/155M rate differential optical transceiver.
Optionally, the second differential transceiver is an 84M/155M rate differential optical transceiver.
Optionally, the differential protection device circuit further includes: the device comprises a real-time clock unit, a nonvolatile memory unit, a main controller, an analog-to-digital converter, a switching value acquisition unit, a protection tripping driving circuit, a PECL/TTL converter and a switcher;
The real-time clock unit, the nonvolatile memory unit, the analog-to-digital converter, the protection tripping driving circuit and the switching value acquisition unit are all connected with the main controller; the master controller is further connected with the PECL/TTL converter, the sending end of the PECL/TTL converter is connected with the switcher, the switcher is respectively connected with the sending end and the receiving end of the first differential transceiver, and the receiving end of the PECL/TTL converter is respectively connected with the sending end and the receiving end of the second differential transceiver.
Optionally, the main controller is an MCU main controller, an ARM main controller or a DSP main controller.
Optionally, the analog-to-digital converter is of the type AD7606.
Optionally, the trip instruction sent by the host computer trips the switch of the corresponding slave computer through the optical fiber daisy chain.
Optionally, the host is connected with the slave through an optical fiber jumper; the slave machine is connected with another slave machine through an optical fiber jumper wire.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
The invention provides a comprehensive measurement and control protection device with a bus differential protection function, which comprises: a plurality of differential protection device circuits; each of the differential bus protection device circuits includes a first differential transceiver and a second differential transceiver; the bus differential protection device circuit is arranged in a switch protection device of an incoming line and an outgoing line of a bus; the bus differential protection is distributed to microcomputer comprehensive protection measurement and control units of all power distribution cabinets in a scattered mode, equipment configuration is reduced, and cost is lowered. Wherein, one of the master differential protection device circuits is a master, and the master differential protection device circuits except the master are slaves; the data transmitting end of the first differential transceiver of the host is connected with the data receiving end of the second differential transceiver of the slave; the data transmitting end of the second differential transceiver of one slave machine is connected with the data receiving end of the second differential transceiver of the other slave machine; the data receiving end of the second differential transceiver of the host is connected with the data transmitting end of the first differential transceiver of the slave, and the data receiving end of the first differential transceiver of the slave is connected with the data transmitting end of the first differential transceiver of the other slave, so that the conventional protection function and the distributed bus differential protection function are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a circuit structure of a differential protection device according to the present invention;
Fig. 2 is a schematic diagram of connection between a first differential transceiver of a master and a second differential transceiver of a slave according to the present invention;
Fig. 3 is a schematic diagram of connection between a second differential transceiver of a master and a first differential transceiver of a slave according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a comprehensive measurement and control protection device with a bus differential protection function, which realizes a conventional protection function and a distributed bus differential protection function.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The invention provides a comprehensive measurement and control protection device with a bus differential protection function, which comprises: a plurality of differential protection device circuits; each of the differential bus protection device circuits includes a first differential transceiver and a second differential transceiver. The structure of each differential protection device circuit is shown in fig. 1.
The bus differential protection device circuit is arranged in a switch protection device of an incoming line and an outgoing line of a bus; wherein, one of the master differential protection device circuits is a master, and the master differential protection device circuits except the master are slaves.
The data transmitting end of the first differential transceiver of the host is connected with the data receiving end of the second differential transceiver of the slave, and the data transmitting end of the second differential transceiver of the slave is connected with the data receiving end of the second differential transceiver of the other slave to form a first optical fiber communication daisy chain; the data transmitting end of the first differential transceiver of the slave is connected with the data receiving end of the first differential transceiver of the other slave, and the data transmitting end of the first differential transceiver of the slave is connected with the data receiving end of the second differential transceiver of the host to form a second optical fiber communication daisy chain.
The host computer sends a synchronous instruction and a synchronous pulse, a correction instruction and a correction pulse to the slave computer through a first optical fiber communication daisy chain, so that the host computer and the slave computer keep sampling synchronization; the host computer also issues differential protection action commands for the bus through a first fiber communication daisy-chain. When the bus fails, a tripping command is sent to trip the switches monitored by the host, and simultaneously, a broadcasting tripping command is issued to all the slaves in the daisy-chain network through the first optical fiber communication daisy-chain to trip all the switches monitored by the slaves.
And the host receives the sampling data of all the slaves in the daisy chain network through a second optical fiber communication daisy chain, and simultaneously calculates bus differential current with the sampling data of the host to complete bus differential protection logic judgment.
The second differential transceiver of the slave is used for receiving a synchronous instruction and a synchronous pulse, so that the sampling of the slave is synchronous with the host; the second differential transceiver of the slave is also used for receiving a tripping instruction of the master to trip the switch monitored by the slave.
The data receiving end of the second differential transceiver of the host is connected with the data transmitting end of the first differential transceiver of the slave, and the data receiving end of the first differential transceiver of the slave is connected with the data transmitting end of the first differential transceiver of the other slave, as shown in fig. 3.
The second differential transceiver of the master is used for receiving the sampling data of each slave.
The first differential transceiver of the slave is used for sending the sampling data of the slave to the host.
The first differential transceiver is an 84M/155M rate differential optical transceiver.
The second differential transceiver is an 84M/155M rate differential optical transceiver.
The differential protection device circuit further comprises: the device comprises a real-time clock unit 4, a nonvolatile memory unit 5, a main controller 1, an analog-to-digital converter 2, a switching value acquisition unit 3, a protection trip driving circuit 6, a PECL/TTL converter 7 and a switcher 8;
The real-time clock unit 4, the nonvolatile memory unit 5, the analog-to-digital converter 2, the protection tripping driving circuit 6 and the switching value acquisition unit 3 are all connected with the main controller 1; the main controller 1 is further connected to the PECL/TTL converter 7, a transmitting end of the PECL/TTL converter 7 is connected to the switch 8, the switch 8 is respectively connected to a transmitting end and a receiving end of the first differential transceiver, and a receiving end of the PECL/TTL converter 7 is respectively connected to a transmitting end and a receiving end of the second differential transceiver.
The switching value acquisition unit 3 acquires external switching values by adopting a photoelectric isolation device; the real-time clock unit 4 is used for generating SOE event time marks; the analog-to-digital converter 2 converts an analog signal into a digital signal; the nonvolatile storage unit 5 is used for storing device fixed values, system parameters and the like, and power failure is not lost; the PECL/TTL converter 7 converts the MCU serial port TTL level into a PECL differential level; the switch 8 selects whether to send data locally (master) or forward data (slave).
The main controller 1 is an MCU main controller, an ARM main controller or a DSP main controller.
The analog-to-digital converter 2 is of the type AD7606.
The trip instruction sent by the host computer is used for tripping the switch of the corresponding slave computer through the first optical fiber communication daisy-chain. When the difference point flow of the master machine and all the slave machines is larger than the set value, the master machine master-slave differential protection action outlet is opened and the corresponding slave machine switch is tripped through the optical fiber daisy chain tripping instruction.
The host is connected with the slave through an optical fiber jumper; the slave machine is connected with another slave machine through an optical fiber jumper wire. And the optical fiber jumper wire is adopted for connection, so that fiber melting is not needed, and network wiring is simplified.
Taking a two-in four-out ring main unit as an example for illustration, the device is configured as a1 host+5 slave. The host synchronizes and receives the sampling data of the slave to complete the differential protection logic operation; the slaves are synchronized to sample data while transmitting the sampled data.
And constructing a master synchronous command and synchronous pulse or a correction command and correction pulse transmission communication daisy chain and a slave data transmission communication daisy chain. The two communication daisy chains are simplex communication, and the two simplex communication forms full duplex communication.
Taking 24-point sampling as an example, 20 milliseconds per cycle, one interrupt per 833.33us is generated, and 1 point is sampled. Sampling, calculation, transfer, synchronization, etc. of data are performed in an interrupted beat.
The sampling point interrupt beats are as shown in table 1:
TABLE 1
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. The utility model provides a take female poor protect function's comprehensive measurement and control protection device which characterized in that includes: a plurality of differential protection device circuits; each of the differential bus protection device circuits includes a first differential transceiver and a second differential transceiver;
The bus differential protection device circuit is arranged in a switch protection device of an incoming line and an outgoing line of a bus; wherein, one of the master differential protection device circuits is a master, and the master differential protection device circuits except the master are slaves;
The data transmitting end of the first differential transceiver of the host is connected with the data receiving end of the second differential transceiver of the slave, and the data transmitting end of the second differential transceiver of the slave is connected with the data receiving end of the second differential transceiver of the other slave to form a first optical fiber communication daisy chain; the data transmitting end of the first differential transceiver of the slave is connected with the data receiving end of the first differential transceiver of the other slave, and the data transmitting end of the first differential transceiver of the slave is connected with the data receiving end of the second differential transceiver of the host to form a second optical fiber communication daisy chain;
The host computer sends a synchronous instruction and a synchronous pulse, a correction instruction and a correction pulse to the slave computer through a first optical fiber communication daisy chain, so that the host computer and the slave computer keep sampling synchronization; the host computer also issues a differential protection action command of the bus through a first optical fiber communication daisy chain; when a bus fails, a tripping command is sent to trip the switch monitored by the host, and simultaneously, a broadcasting tripping command is issued to all the slaves in the daisy chain network through a first optical fiber communication daisy chain to trip the switch monitored by all the slaves;
The host receives sampling data of all the slaves in the daisy chain network through a second optical fiber communication daisy chain, and performs bus differential current calculation with the sampling data of the host to complete bus differential protection logic judgment;
The second differential transceiver of the slave is used for receiving a synchronous instruction and a synchronous pulse, so that the sampling of the slave is synchronous with the host; the second differential transceiver of the slave is also used for receiving a tripping instruction of the master to trip the switch monitored by the slave;
The data receiving end of the second differential transceiver of the host is connected with the data transmitting end of the first differential transceiver of the slave, and the data receiving end of the first differential transceiver of the slave is connected with the data transmitting end of the first differential transceiver of the other slave;
the second differential transceiver of the host is used for receiving the sampling data of each slave;
the first differential transceiver of the slave is used for sending the sampling data of the slave to the host;
the first differential transceiver is an 84M/155M rate differential optical transceiver;
the second differential transceiver is an 84M/155M rate differential optical transceiver.
2. The integrated measurement and control protection device with a bus differential protection function according to claim 1, wherein the bus differential protection device circuit further comprises: the device comprises a real-time clock unit, a nonvolatile memory unit, a main controller, an analog-to-digital converter, a switching value acquisition unit, a protection tripping driving circuit, a PECL/TTL converter and a switcher;
The real-time clock unit, the nonvolatile memory unit, the analog-to-digital converter, the protection tripping driving circuit and the switching value acquisition unit are all connected with the main controller; the master controller is further connected with the PECL/TTL converter, the sending end of the PECL/TTL converter is connected with the switcher, the switcher is respectively connected with the sending end and the receiving end of the first differential transceiver, and the receiving end of the PECL/TTL converter is respectively connected with the sending end and the receiving end of the second differential transceiver.
3. The comprehensive measurement and control protection device with the bus differential protection function according to claim 2, wherein the main controller is an MCU main controller, an ARM main controller or a DSP main controller.
4. The comprehensive measurement and control protection device with a bus differential protection function according to claim 2, wherein the model of the analog-to-digital converter is AD7606.
5. The comprehensive measurement and control protection device with a bus differential protection function according to claim 1, wherein the tripping command sent by the host computer trips the switch of the corresponding slave computer through an optical fiber daisy chain.
6. The comprehensive measurement and control protection device with a bus differential protection function according to claim 1, wherein the host is connected with the slave through an optical fiber jumper; the slave machine is connected with another slave machine through an optical fiber jumper wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011363867.5A CN112510660B (en) | 2020-11-27 | 2020-11-27 | Comprehensive measurement and control protection device with bus differential protection function |
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| CN202011363867.5A CN112510660B (en) | 2020-11-27 | 2020-11-27 | Comprehensive measurement and control protection device with bus differential protection function |
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| CN112510660A CN112510660A (en) | 2021-03-16 |
| CN112510660B true CN112510660B (en) | 2024-05-31 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003124947A (en) * | 2001-10-17 | 2003-04-25 | Tetsudo Kizai Kogyo Kk | Daisy chain data input/output system by serial communication system |
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