CN102565632B - Automatically-connected remote control grounded line disconnection and selection working method for low-current system - Google Patents
Automatically-connected remote control grounded line disconnection and selection working method for low-current system Download PDFInfo
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- CN102565632B CN102565632B CN201210070517.9A CN201210070517A CN102565632B CN 102565632 B CN102565632 B CN 102565632B CN 201210070517 A CN201210070517 A CN 201210070517A CN 102565632 B CN102565632 B CN 102565632B
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Abstract
The invention discloses an automatically-connected remote control grounded line disconnection and selection working method for a low-current system, and belongs to a remote control disconnected and connected line breaker method. The method comprises the following flows that: a central monitoring system sends a remote control command to a remote transformer substation; an on-site automatic line selection device in the transformer substation receives the remote control command and performs disconnection through a line measurement and control device; the line breaker performs disconnection and starts a connection loop to perform automatic connection instantly; although the line breaker performs disconnection and connection instantly, the measurement and control device acquires information indicating whether voltage is changed instantly; a programmable logic or judgment device generates a message of a bus voltage recovery state and processes the message; the programmable logic or judgment device judges whether to continue to pull the line or upload a line selection result according to a bus voltage recovery condition; and the operation is sequentially circulated until a grounded line is disconnected permanently. The invention has the advantages that: the power failure time of a user is shortened, and the operation time of the conventional line disconnection method is shortened to 1 second or so; and the method is easy to operate, high in performance, safe, reliable and high in practicability slightly influenced by a communication network environment and powerful.
Description
Technical field
The present invention relates to the method that small current neutral grounding system remote control carries out drawing road route selection.Belong to the method for robotization logic discrimination Long-distance Control deciliter line-breaker.When being specially adapted to 35kV and following small current neutral grounding system generation single-phase earthing, due to when small current neutral grounding system generation circuit single-phase earthing, due to many reasons such as arc suppression coil inputs, cause line-selected earthing device can not accurate positioning both ground circuit, the situation of road route selection must be drawn.
Background technology
Along with power network line is expanded rapidly, the administrative 35kV of Surveillance center and following supply line have reached more than 300, cover more than 1,000 square kilometre, suburbs.Often singlephase earth fault occurs in operation, particularly under the severe weather conditions such as rainy season, strong wind and snow, Frequent Troubles especially, has had a strong impact on the safety of converting equipment and electrical network, economical operation.Current conventional processing adopts " drawing road to search ", due to the popularization and application of integrated automatic system, busbar voltage change will be sampled by device, A/D conversion, process, the circuit such as Internet Transmission operated a switch power failure after 10 ~ 20 seconds, could analysis confirmation, pass through the operation recovery power transmission of a few minutes again.Cause grave danger to the safety in production of the user such as factories and miness, chemical industry, have a serious impact power supply enterprise's image, the power off time how shortening user simultaneously, detects that faulty line has great significance rapidly and accurately.
When small current neutral grounding system generation circuit single-phase earthing, due to many reasons such as arc suppression coil inputs, cause line-selected earthing device can not accurate positioning both ground circuit.Current various wiring line selection apparatus Principle Method has a variety of, but because the moment of arc suppression coil drops into, inductive current is provided to compensate for earthing capacitance current, ground current is reduced, reduce the voltage step amplitude because earth fault causes, thus reduce the route selection accuracy rate of line-selected earthing device.Must carry out drawing road route selection, locking faulty line.
The major defect of traditional earthing wire-selecting method is:
1) 3 operations staffs at least to be arranged to be on the scene;
2) road → wait one section of observing and controlling voltage refresh time is drawn
3) through the grid switching operation of a few minutes, power transmission is recovered
Also need to send someone according to the right-on change monitoring busbar voltage of pulpit public measure and control device display screen simultaneously.Extend the power off time of user, consume manpower and materials, increase the hidden peril of accident rushing towards transformer station, also easy erroneous judgement.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of small current system ground connection and far controlling automatic reclosing and draw road route selection modus operandi.
The present invention is achieved through the following technical solutions: small current system ground connection far controls automatic reclosing draws road route selection modus operandi, original supervisory system is utilized to coordinate the measure and control device of substation field, carried out separating brake, the automatic closing of single-phase earthing line-breaker by special Logic judgment device, and the method for work of positioning both ground circuit;
The equipment used is: comprise Surveillance center's supervisory system, and road route selection automation equipment draws in transformer station, line switching observing and controlling integrated device, gathers the public measure and control device of voltage; Transformer station draws road route selection automation equipment, line switching observing and controlling integrated device to be connected by network-bus in plant stand station with the public measure and control device gathering voltage; The digital communication network be connected with plant stand by main website again and central monitor system communication send the telecommand of route selection result or receiving center supervisory system;
Specific works method is as follows:
1) send out guidance command by Surveillance center's supervisory system and draw road route selection automation equipment to the transformer station in a distant place;
2) transformer station carries out separating brake by line switching observing and controlling integrated device after drawing route selection automation equipment in road to receive telecommand, and the public measure and control device Real-time Collection pressure now gathering voltage becomes three-phase, the 3U0 voltage value of open delta;
3) reclosure loop reform moment automatic closing is started after line-breaker separating brake;
4) although line-breaker only moment deciliter, transformer station draws route selection automation equipment in road whether to collect change in voltage instantaneously by public measure and control device, and user also only moment dead electricity;
5) drawn the message of the logical OR discriminating gear generatrix voltage resume state of road route selection automation equipment program to go forward side by side row relax by transformer station;
6) selecting to continue route selection according to the differentiation of busbar voltage recovery situation draws road still to upload route selection result;
7) forever ground path is pulled open according to ground path.
When not using step 6) time, existing change in voltage result can be used in form to reach Surveillance center by remote signalling, carry out positioning both ground circuit by Surveillance center according to busbar voltage change, carry out remote control and draw road.
The invention has the beneficial effects as follows: the present invention compares with existing method of work, do not need to send someone to rush towards substation field to carry out drawing road route selection, when Surveillance center carries out drawing road route selection, do not need after remote control separating brake yet, wait for that a few minutes observe the change of busbar voltage telemetry, then consider that carrying out remote control combined floodgate recovers power transmission.This construction method is rational in infrastructure, easy and simple to handle, superior performance, safe and reliable, practical, by the advantage that communication network environment influence factor is little.And logic discrimination function, not only sequencing automatic sequence can draw road route selection, postsearch screening can also be carried out according in line-selected earthing device range of choice, can also according to drawing road principle, as road order is drawn in long overhead transmission line, insignificant subscriber's line, responsible consumer arrangement, not easily can also there is the feature of ground connection according to pure cable line, skip the actuating logic of cable line.
Accompanying drawing explanation
Further the inventive method is further illustrated below in conjunction with drawings and Examples.
Fig. 1 is that small current system ground connection far controls automatic reclosing and draws road route selection modus operandi operating process schematic diagram;
Fig. 2 is the equipment overall structure figure that small current system ground connection far controls automatic reclosing and draws route selection modus operandi in road to use.
Road route selection automation equipment principle assumption diagram draws in Tu3Shi transformer station.
In figure: 1, Surveillance center's supervisory system, 2, the digital communication network that is connected with plant stand of main website, 3, transformer station draws road route selection automation equipment, 4, line switching observing and controlling integrated device, 5, gather the public measure and control device of voltage, 6, network-bus in plant stand station.
Embodiment
The present embodiment is for monitoring class of Xuzhou Power Supply Company and certain transformer station administrative.
As shown in Figure 2, the equipment of use is: comprise Surveillance center's supervisory system 1, and road route selection automation equipment 3 draws in transformer station, line switching observing and controlling integrated device 4, gathers the public measure and control device 5 of voltage; Transformer station draws road route selection automation equipment 3, line switching observing and controlling integrated device 4 to be connected by network-bus 6 in plant stand station with the public measure and control device 5 gathering voltage; The digital communication network 2 and central monitor system 1 communication that are connected with plant stand by main website send the telecommand of route selection result or receiving center supervisory system 1 again
One, material and equipment
As shown in Figure 3, the transformer station of employing draws road route selection automation equipment 3 to comprise microprocessor CPU, the memory read ROM be connected with microprocessor CPU, random readable and writable memory RAM, flash memory FLASHMEMORY, EEPROM EEPROM able to programme, quantity of state input and output I/O port, Control on Communication device liquid crystal display operation keyboard and signal lamp.
Two, engineering method flow process:
As shown in Figure 1, in monitoring class, person on duty is according to dispatch command in monitoring, utilize OPEN3000 system remote control picture, draw road automaton 3 to carry out after remote control → substation field draws route selection aut.eq. in road to receive telecommand to the local ground connection of certain transformer station and carry out separating brake by line switching observing and controlling integrated device 4, the public measure and control device Real-time Collection pressure now gathering voltage becomes the three-phase of open delta, although start reclosure loop reform moment automatic closing → line-breaker moment deciliter after 3U0 voltage value → line-breaker separating brake, the change in voltage that measure and control device 5 has collected instantaneously whether → to be gone forward side by side row relax → select to continue route selection according to the differentiation of busbar voltage recovery situation to draw road still to upload the circulation of route selection result → successively until forever pull open ground path according to the ground path differentiated by the message of programmed logic or discriminating gear generatrix voltage resume state.
Three, effect:
When small current neutral grounding system generation circuit single-phase earthing, due to many reasons such as arc suppression coil inputs, cause line-selected earthing device can not accurate positioning both ground circuit, use route selection modus operandi in this Yuan Kongla road can reduce the power off time of user, routine drawn path method to foreshorten to about 1 second by a few minutes.Easy and simple to handle, superior performance, safe and reliable, practical, little by communication network environment influence factor, powerful, not only sequencing automatic sequence can draw road route selection, postsearch screening can also be carried out according in line-selected earthing device range of choice, basis can also draw road principle, as road order is drawn in long overhead transmission line, insignificant subscriber's line, responsible consumer arrangement, not easily can also there is the feature of ground connection according to pure cable line, skip the actuating logic of cable line.
Claims (2)
1. a small current system ground connection far controls automatic reclosing and draws road route selection modus operandi, it is characterized in that utilizing original supervisory system to coordinate the measure and control device of substation field, carried out separating brake, the automatic closing of single-phase earthing line-breaker by special Logic judgment device, and the method for work of positioning both ground circuit;
The equipment used is: comprise Surveillance center's supervisory system (1), and road route selection automation equipment (3) draws in transformer station, line switching observing and controlling integrated device (4), gathers the public measure and control device (5) of voltage; Transformer station draws road route selection automation equipment (3), line switching observing and controlling integrated device (4) to be connected by network-bus (6) in plant stand station with the public measure and control device (5) gathering voltage; The digital communication network (2) be connected with plant stand by main website again and central monitor system (1) communication send the telecommand of route selection result or receiving center supervisory system (1);
Specific works method is as follows:
1) send out guidance command by Surveillance center's supervisory system (1) and draw road route selection automation equipment (3) to the transformer station in a distant place;
2) transformer station carries out separating brake by line switching observing and controlling integrated device (4) after drawing road route selection automation equipment (3) to receive telecommand, and public measure and control device (5) the Real-time Collection pressure now gathering voltage becomes three-phase, the 3U0 voltage value of open delta;
3) reclosure loop reform moment automatic closing is started after line-breaker separating brake;
4) although line-breaker only moment deciliter, transformer station draws road route selection automation equipment (3) whether to collect change in voltage instantaneously by public measure and control device, and user also only moment dead electricity;
5) drawn the message of the logical OR discriminating gear generatrix voltage resume state of road route selection automation equipment program to go forward side by side row relax by transformer station;
6) selecting to continue route selection according to the differentiation of busbar voltage recovery situation draws road still to upload route selection result;
7) forever ground path is pulled open according to ground path.
2. small current system ground connection according to claim 1 far controls automatic reclosing and draws road route selection modus operandi, it is characterized in that when not using step 6) time, existing change in voltage result can be used to reach Surveillance center by remote signalling in form, carry out positioning both ground circuit by Surveillance center according to busbar voltage change, carry out remote control and draw road.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210070517.9A CN102565632B (en) | 2012-03-18 | 2012-03-18 | Automatically-connected remote control grounded line disconnection and selection working method for low-current system |
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| CN201210070517.9A CN102565632B (en) | 2012-03-18 | 2012-03-18 | Automatically-connected remote control grounded line disconnection and selection working method for low-current system |
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| CN102565632B true CN102565632B (en) | 2015-04-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102789603B (en) * | 2012-07-24 | 2016-01-20 | 中国电力科学研究院 | A kind ofly take into account the provincial scheduling active power adjustment method that load draws road model |
| CN104377666A (en) * | 2013-08-16 | 2015-02-25 | 刘晓博 | High-speed trial wiring strategy for ground fault of electric power system and trial wiring circuit topology |
| CN104299808B (en) * | 2014-10-17 | 2016-08-31 | 北京华美煜力电力技术有限公司 | A kind of isolation switch control system |
| CN107329035A (en) * | 2017-07-31 | 2017-11-07 | 国电南瑞科技股份有限公司 | A kind of quick examination pulling method of automatic dispatching system small current ground connection and system |
| CN115951114B (en) * | 2023-01-17 | 2023-06-23 | 上海山源电子科技股份有限公司 | Current signal identification method in power supply monitoring system |
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| CN1547307A (en) * | 2003-12-16 | 2004-11-17 | 北京丹华昊博电力科技有限公司 | Method and apparatus for single phase ground fault route selection of low-current grounding power network |
| CN101216709A (en) * | 2007-12-28 | 2008-07-09 | 毛建良 | Client distribution automation remote real time monitoring system |
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| JP3425305B2 (en) * | 1996-09-02 | 2003-07-14 | 株式会社日立製作所 | Ground fault line selective protection relaying method and device |
| CN2363410Y (en) * | 1999-02-08 | 2000-02-09 | 于晓平 | Intelligent electric distribution switch monitoring controller |
| CN2638311Y (en) * | 2003-07-15 | 2004-09-01 | 河北冀能科技电力自动化设备有限公司 | Total automation device for transformer substation |
| CN201156681Y (en) * | 2008-01-28 | 2008-11-26 | 苏善伟 | Intelligent power distribution system |
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| CN1547307A (en) * | 2003-12-16 | 2004-11-17 | 北京丹华昊博电力科技有限公司 | Method and apparatus for single phase ground fault route selection of low-current grounding power network |
| CN101216709A (en) * | 2007-12-28 | 2008-07-09 | 毛建良 | Client distribution automation remote real time monitoring system |
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Owner name: JIANGSU ELECTRIC POWER COMPANY STATE GRID CORPORAT Effective date: 20121107 |
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Effective date of registration: 20121107 Address after: 221006 Jiefang North Road, Jiangsu, Xuzhou, No. 20 Applicant after: Xuzhou Power Supply Company of Jiangsu Electric Power Company Applicant after: Jiangsu Electric Power Company Applicant after: State Grid Corporation of China Address before: 221006 Jiefang North Road, Jiangsu, Xuzhou, No. 20 Applicant before: Xuzhou Power Supply Company of Jiangsu Electric Power Company |
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