CN202183639U - Intelligent switch and fault isolation system of distribution network line - Google Patents
Intelligent switch and fault isolation system of distribution network line Download PDFInfo
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- CN202183639U CN202183639U CN201120319593XU CN201120319593U CN202183639U CN 202183639 U CN202183639 U CN 202183639U CN 201120319593X U CN201120319593X U CN 201120319593XU CN 201120319593 U CN201120319593 U CN 201120319593U CN 202183639 U CN202183639 U CN 202183639U
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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
- 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
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses an intelligent switch of a distribution network line, which comprises a load switch and a controller. The controller comprises a fault detection module used for detecting whether a fault exists in the line and determining first fault information, a voltage monitoring module used for starting a communication module, the communication module adopting a programmable logic controller (PLC) communication mode to transmit the first fault information provided by the fault detection module to the distribution network line and receiving second fault information from the distribution network line and a core processing module for determining a fault interval according to the first fault information and the second fault information. If intelligent switches are arranged at two ends of the fault interval, a performing module cuts off the load switch. Meanwhile, a fault isolation system with a plurality of intelligent switches is further disclosed, the system can isolate a fault within a short blackout period after the fault occurs, thereby shortening blackout time, reducing blackout ranges and improving reliability of power supply.
Description
Technical field
The utility model belongs to power system automatic field, is specifically related to the intelligent switch that is applicable to the power distribution network circuit and the fault isolation system of a kind of employing PLC (power line communication) technology.
Background technology
Because the develop rapidly of power technology is increasingly high for requiring on the distribution network fault handling time.In the shortest time, important problem when confirming fault section and rapid isolated fault interval.Present developed countries generally uses on the post SOG intelligence on-load switch to realize location, quick fault zone and isolated fault zone in Japan especially.SOG intelligence on-load switch is a kind ofly to have overcurrent memory and blocking function, and the intelligent on-load switch of earth fault protection function.Chinese patent 200620122673.5 disclosed " intelligent demarcation load switch " is exactly a kind of SOG intelligence on-load switch; This switch adopts zero sequence current mutual inductor, current sensor and voltage sensor to carry out the real-time detection of fault; Adopt actuator to come the make and break load switch body, adopt control of intelligent terminal to come the action of control executing mechanism as controller.When earth fault took place, SOG intelligence on-load switch can be distinguished fault and occur in mains side or load side through analyzing the phase angle of residual voltage and electric current automatically.If in load side, then switch will be in setting-up time automatic brake separating.When SOG intelligence on-load switch load side failed because, can remember fault current, earlier by after the substation breakers tripping operation circuit dead electricity, the reclosing success again of switch automatic brake separating, circuit breaker.But because the characteristics of SOG intelligence on-load switch; In use the fault upstream switch all can detect phenomenon of the failure and cause tripping operation simultaneously; Therefore can't be connected in series use; Basically all be to adopt the single-point operation, be only applicable to the isolation of user side fault, can not realize the Fault Isolation of the different sections of power distribution network circuit.
Summary of the invention
The utility model provides a kind of intelligent switch and fault isolation system that is applicable to whole power distribution network circuit to the deficiency of above-mentioned prior art.The utility model is used for fault isolation system with intelligent switch, through the plc communication between the intelligent switch, realizes the rapid isolation of distribution network failure, thereby has improved power supply reliability greatly.
The utility model is to adopt following technical scheme to realize:
The utility model provides a kind of intelligent switch of power distribution network circuit; Comprise on-load switch and controller, said on-load switch is electrically connected with said controller, and said controller comprises fault detection module and Executive Module; Fault detection module; Be used for real-time detection line and whether break down, when line failure, confirm first fault message; Executive Module is used for breaking off or closed said on-load switch; It is characterized in that said controller also comprises monitoring voltage module, communication module and core processing module,
The voltage monitoring module is used for the voltage of real-time Monitoring Line, when said voltage is lower than preset value, starts communication module;
Communication module adopts the plc communication mode that first fault message that fault detection module obtains is sent to the power distribution network circuit, and receives second fault message from the power distribution network circuit;
Core processing module according to said first fault message and said second fault message, is judged fault section; If said intelligent switch is positioned at the two ends of fault section, the notice Executive Module breaks off said on-load switch.
Further, described intelligent switch also comprises a wireless sending module, and said wireless sending module is used to send deciliter state and the working condition of intelligent switch.
Further, said wireless sending module is the GPRS wireless communication terminal.
The utility model also provides a kind of fault isolation system of power distribution network circuit, and this fault isolation system comprises a plurality of intelligent switchs that are arranged at the power distribution network circuit, and said a plurality of intelligent switchs are divided into a plurality of intervals with the power distribution network circuit;
Single intelligent switch is judged fault section according to the fault message that himself detects and the fault message of other intelligent switchs on the same feeder line; The intelligent switch that is positioned at the fault section two ends is carried out opening operation, realizes the isolation of fault section.
The utlity model has following beneficial effect:
1, the utility model comes the detection line fault through adopting intelligent switch, and failure judgement is interval, if fault occurs in its own power source side or load side, then breaks off intelligent switch, and is interval with isolated fault.This continuous action can take place all to accomplish within the of short duration outage in back in fault, has shortened interruption duration, has reduced the power failure scope, has improved power supply reliability.
2, the utility model is through being provided with wireless communication module in intelligent switch; Can the situation such as deciliter state of intelligent switch be sent to the power distribution network main website; Simultaneously can the very first time notify the maintainer; Be convenient to fault fast positioning and arrange maintainer's rapidly removing faults, reduce the coverage of fault.
3, the described fault isolation system of the utility model is simple in structure and reliability is high, does not need powerful daemon software support, does not rely on backstage centralized control apparatus and dedicated communication line equipment, and equipment investment cost is low, installs simple and convenient, applied widely.
Description of drawings
Fig. 1 is the cut-away view of the described intelligent switch of the utility model;
Fig. 2 is the described cut-away view that contains the intelligent switch of wireless sending module of the utility model;
Fig. 3 is the described GPRS wireless communication network topology of the utility model figure;
Fig. 4 is the schematic diagram of the described fault isolation system of the utility model;
Fig. 5 is the workflow diagram of the described fault isolation system of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
As shown in Figure 1; The described intelligent switch of the utility model comprises on-load switch 1 and controller 2, and said on-load switch 1 is electrically connected with said controller 2; Said on-load switch 1 can manually break off or be closed, also can be carried out by controller 2 controls and break off or closure.Said on-load switch 1 is a kind of high-voltage switch gear with arc control device, can cut off rated load electric current and certain overload current, but can not cutting-off of short-circuit electric current.Said controller 2 comprises fault detection module 3, monitoring voltage module 4, communication module 5, core processing module 6 and Executive Module 7, and whether fault detection module 2 is used for real-time detection line and breaks down.When line failure, confirm first fault message.Said fault comprises the ground connection and the short trouble of intelligent switch place feeder line, and said first fault message comprises that fault occurs in the power supply survey or the load side of intelligent switch.Said fault detection module 2 can adopt zero sequence current mutual inductor of the prior art, current sensor or voltage sensor to wait and realize, through analyzing the phase angle of residual voltage and electric current, must be out of order occurs in mains side or load side simultaneously.Voltage monitoring module 4 is used for the voltage of real-time Monitoring Line, when said voltage is lower than preset value, thinks that then line outage, this moment start communication module 5.Preset value can be set by administrative staff, as long as near 0.Said voltage monitoring module 4 can adopt voltage sensor of the prior art to realize.Communication module 5 adopts the plc communication mode that first fault message that fault detection module 2 obtains is sent to the power distribution network circuit, and receives second fault message from the power distribution network circuit.When certain communication module 5 transmitting line fault message; Other communication modules 5 on the same feeder line all are in the reception information state; After all communication modules 5 are sent the end of message in order, then realized the exchange of the fault message of all intelligent switchs on the same feeder line.Described plc communication mode is meant that the electrification line as communication media, carries out the multi-carrier communication with other equipment.The plc communication technology has been widely used in the relaying protection communication, and technology is very ripe, and this patent repeats no more.Core processing module 6 according to said first fault message and said second fault message, is judged fault section.The basic principle of confirming fault section is: if the detection failure information result of two adjacent intelligent switchs is different arbitrarily, then explain to be fault section between these two adjacent intelligent switchs.After core processing module 6 was judged fault section, if said intelligent switch is positioned at the two ends of fault section, notice Executive Module 7 broke off said on-load switch 1.
Preferably; The described intelligent switch of the utility model can also comprise a wireless sending module; As shown in Figure 2, this wireless sending module can be sent to the wireless receiving end with information such as deciliter state of intelligent switch, working conditions, and the wireless receiving end can be power distribution network main website or various office terminal.Described wireless transmission and wireless receiving can utilize ripe, reliable, the wide GPRS network that covers of China Mobile, utilize the GPRS network platform to realize the transparent transmission of data message.As shown in Figure 3; Increase the GPRS wireless communication terminal as wireless sending module in intelligent switch inside; Just can deciliter state and the working condition of this intelligent switch be sent to the power distribution network main website with the GPRS pattern, perhaps notify relevant operational management personnel with the SMS isotype.When line fault takes place, can the very first time information be sent to main website, perhaps send to administrative staff with the note form; Main website or administrative staff are according to the information that receives; Can in time draw the ruuning situation or the fault coverage of distribution line, can in time arrange the maintainer to fix a breakdown simultaneously, thereby shorten the fault reflection time; Reduce the investigation scope and time, shorten failure recovery time and cost generally.
The utility model also provides a kind of fault isolation system of power distribution network circuit; As shown in Figure 4; This fault isolation system comprises a plurality of intelligent switchs that are arranged at the power distribution network circuit; Said a plurality of intelligent switch is divided into a plurality of intervals with the power distribution network circuit, and these intelligent switchs adopt carrier communication mode to constitute an information network.Single intelligent switch is promptly judged fault section through the interchange information of each intelligent switch on the same feeder line according to the fault message that himself detects and the fault message of other intelligent switchs on the same feeder line; The intelligent switch that is positioned at the fault section two ends is carried out opening operation, realizes the isolation of fault section.
Adopt the described fault isolation system of the utility model, when the power distribution network line failure, the course of work of this fault isolation system is as shown in Figure 5, and is specific as follows:
Step 1: each intelligent switch that is arranged on the faulty line detects the fault generation, and fault message is preserved.
Step 2: the protection relay of transformer station sends the separating brake instruction, breaker open operation, and this circuit is stopped power supply.
Step 3: each intelligent switch as entry condition, begins to carry out plc communication with power cut signal.Each intelligent switch is in order successively with self detected fault message transmission.Synchronization has only an intelligent switch to be in transmit status, and other intelligent switchs are in accepting state.
Step 4: after all intelligent switchs all sent end with fault message, each intelligent switch had all been known the detected fault message of other intelligent switchs on this faulty line, thus the fault section of judging.
Step 5: the intelligent switch that is positioned at the fault section two ends breaks off, and is interval with isolated fault.
Step 6: after fault section was isolated, when the closing relay again (or automatic circuit) of transformer station when sending reclosing command, breaker closing recovered trouble-free interval normal power supply.
On the circuit with connected successively four intelligent switch SW-A, SW-B, SW-C and SW-D, between SW-B and the SW-C earth fault taking place is example, and the course of work of this fault isolation system further is described below:
Step 1:SW-A detects " load side ground connection ", and SW-B detects " load side ground connection ", and SW-C detects " mains side ground connection ", and SW-D detects " mains side ground connection ".
Step 2: the protection relay of transformer station sends the separating brake instruction, breaker open operation, and this circuit is stopped power supply.
Step 3: four intelligent switch SW-A, SW-B, SW-C and SW-D send the fault message of self in order successively; SW-A sends to SW-B, SW-C and SW-D; SW-B sends to SW-A, SW-C and SW-D; SW-C sends to SW-A, SW-B and SW-D, and SW-D sends to SW-A, SW-B and SW-C.
Step 4: send after the end, each intelligent switch learns that all SW-A detects " load side ground connection ", and SW-B detects " load side ground connection "; SW-C detects " mains side ground connection "; SW-D detects " mains side ground connection ", and each intelligent switch judges whether two adjacent arbitrarily on this circuit intelligent switch testing results are identical, if different; Then explaining to be fault section between these two adjacent intelligent switchs, is between SW-B and the SW-C thereby judge fault section.
Step 5: fault section is in the load side of SW-B, the mains side of SW-C, and then SW-B and SW-C all send the instruction of separating brake to on-load switch, and be interval with isolated fault.
Step 6: after fault section was isolated, when the closing relay again (or automatic circuit) of transformer station when sending reclosing command, breaker closing recovered trouble-free interval normal power supply, and the interconnection switch that can also close is realized oppositely sending.
The utility model not only is confined to above-mentioned embodiment; Persons skilled in the art are according to the disclosed content of the utility model; Can adopt other multiple embodiment embodiment of the present invention, therefore, project organization of every employing the utility model and thinking; Do some simple designs that change or change, all fall into the scope of the utility model protection.
Claims (4)
1. the intelligent switch of a power distribution network circuit; Comprise on-load switch and controller, said on-load switch is electrically connected with said controller, and said controller comprises fault detection module and Executive Module; Fault detection module; Be used for real-time detection line and whether break down, when line failure, confirm first fault message; Executive Module is used for breaking off or closed said on-load switch;
It is characterized in that said controller also comprises monitoring voltage module, communication module and core processing module,
The voltage monitoring module is used for the voltage of real-time Monitoring Line, when said voltage is lower than preset value, starts communication module;
Communication module adopts the plc communication mode that first fault message that fault detection module obtains is sent to the power distribution network circuit, and receives second fault message from the power distribution network circuit;
Core processing module according to said first fault message and said second fault message, is judged fault section; If said intelligent switch is positioned at the two ends of fault section, the notice Executive Module breaks off said on-load switch.
2. intelligent switch according to claim 1 is characterized in that described intelligent switch also comprises a wireless sending module, and said wireless sending module is used to send deciliter state and the working condition of intelligent switch.
3. intelligent switch according to claim 2 is characterized in that, said wireless sending module is the GPRS wireless communication terminal.
4. the fault isolation system of a power distribution network circuit, this fault isolation system comprise and are arranged at a plurality of like the arbitrary described intelligent switch of claim 1-3 of power distribution network circuit that said a plurality of intelligent switchs are divided into a plurality of intervals with the power distribution network circuit;
Single intelligent switch is judged fault section according to the fault message that himself detects and the fault message of other intelligent switchs on the same feeder line; The intelligent switch that is positioned at the fault section two ends is carried out opening operation, realizes the isolation of fault section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120319593XU CN202183639U (en) | 2011-08-29 | 2011-08-29 | Intelligent switch and fault isolation system of distribution network line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120319593XU CN202183639U (en) | 2011-08-29 | 2011-08-29 | Intelligent switch and fault isolation system of distribution network line |
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| CN202183639U true CN202183639U (en) | 2012-04-04 |
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| CN201120319593XU Expired - Fee Related CN202183639U (en) | 2011-08-29 | 2011-08-29 | Intelligent switch and fault isolation system of distribution network line |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738896A (en) * | 2012-06-15 | 2012-10-17 | 河南省电力公司郑州供电公司 | HP-9000 type switching station fault treatment system |
| CN103698658A (en) * | 2013-12-26 | 2014-04-02 | 杭州国电电气设备有限公司 | Power grid fault detection method, power grid fault detection device and power grid fault detection system |
| CN104092207A (en) * | 2014-07-18 | 2014-10-08 | 尤田柱 | Back voltage automatic locking controller |
| CN104578000A (en) * | 2015-01-27 | 2015-04-29 | 国家电网公司 | Power supply line fault isolating method, device and system |
| CN104615050A (en) * | 2015-01-13 | 2015-05-13 | 烟台智慧云谷云计算有限公司 | Intelligent switch circuit with electric current and fault detection functions |
| CN105406595A (en) * | 2015-11-27 | 2016-03-16 | 宁波三星医疗电气股份有限公司 | Split-type intelligent switch for distribution network |
| CN105954636A (en) * | 2016-04-21 | 2016-09-21 | 张顺 | Short circuit and ground fault indicator |
| CN104092207B (en) * | 2014-07-18 | 2017-01-04 | 尤田柱 | The automatic locking-controller of back-pressure |
| CN107561412A (en) * | 2017-09-30 | 2018-01-09 | 广西电网有限责任公司南宁供电局 | A kind of quick feeder fault location of power automation and shielding system and method |
| US20220181871A1 (en) * | 2020-12-07 | 2022-06-09 | S&C Electric Company | Fault isolation |
-
2011
- 2011-08-29 CN CN201120319593XU patent/CN202183639U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738896A (en) * | 2012-06-15 | 2012-10-17 | 河南省电力公司郑州供电公司 | HP-9000 type switching station fault treatment system |
| CN103698658A (en) * | 2013-12-26 | 2014-04-02 | 杭州国电电气设备有限公司 | Power grid fault detection method, power grid fault detection device and power grid fault detection system |
| CN104092207A (en) * | 2014-07-18 | 2014-10-08 | 尤田柱 | Back voltage automatic locking controller |
| CN104092207B (en) * | 2014-07-18 | 2017-01-04 | 尤田柱 | The automatic locking-controller of back-pressure |
| CN104615050A (en) * | 2015-01-13 | 2015-05-13 | 烟台智慧云谷云计算有限公司 | Intelligent switch circuit with electric current and fault detection functions |
| CN104578000A (en) * | 2015-01-27 | 2015-04-29 | 国家电网公司 | Power supply line fault isolating method, device and system |
| CN105406595A (en) * | 2015-11-27 | 2016-03-16 | 宁波三星医疗电气股份有限公司 | Split-type intelligent switch for distribution network |
| CN105954636A (en) * | 2016-04-21 | 2016-09-21 | 张顺 | Short circuit and ground fault indicator |
| CN107561412A (en) * | 2017-09-30 | 2018-01-09 | 广西电网有限责任公司南宁供电局 | A kind of quick feeder fault location of power automation and shielding system and method |
| US20220181871A1 (en) * | 2020-12-07 | 2022-06-09 | S&C Electric Company | Fault isolation |
| US11616358B2 (en) * | 2020-12-07 | 2023-03-28 | S&C Electric Company | Fault isolation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120404 Termination date: 20120829 |