CN102255391A - Feeder automation system with on-line protective fixed value setting function - Google Patents
Feeder automation system with on-line protective fixed value setting function Download PDFInfo
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- CN102255391A CN102255391A CN2011102148457A CN201110214845A CN102255391A CN 102255391 A CN102255391 A CN 102255391A CN 2011102148457 A CN2011102148457 A CN 2011102148457A CN 201110214845 A CN201110214845 A CN 201110214845A CN 102255391 A CN102255391 A CN 102255391A
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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
Abstract
The invention discloses a feeder automation system with an on-line protective fixed value setting function. The system comprises a data management module, a fault processing module and a fixed value setting module, wherein a data acquisition part of the data management module collects the real-time operating data in a power grid partially; when a line of the power grid fails, a fault diagnosis part of the fault processing module judges fault points and fault types according to the relevant standards; a fault isolation part carries out an isolation operation on the corresponding fault points; a fault recovery part restores the power supply for a non-fault area; and changes related to the power grid can trigger the fixed value setting module to automatically calculate and modify the protective fixed value of a protective device, so that the protective fixed value can be applied to an existing system, and the feeder automation of a distribution network with a distributed power supply or a complicated network structure can be realized.
Description
Technical field
The present invention relates to realize containing distributed power source or the feeder automation of complicated 10kV distribution line of network configuration; and relay protection constant value in line computation and revise technical field, particularly a kind of feed line automatization system with protection definite value on-line tuning function.
Background technology
In recent years, along with the fast development of electric power system correlation technique, and the proposition of intelligent grid notion, the small distributed generating has replaced the generating of large-scale centralized formula, becomes the development trend of intelligent electrical network.
Intelligent grid is divided into intelligent power transmission network and intelligent power distribution net.The intelligence power transmission network is a principal character with high-power, big capacity and super ultra high voltage mainly, and the new technology content that the intelligent power distribution netting gear has is many, and is bigger with traditional power distribution network difference, so the intelligent power distribution net is the key point of intelligent grid development.The influence that is produced that distributed power source inserts electrical network is mainly reflected in the power distribution network aspect.
Feeder automation is meant that transformer station's outlet to the feeder line automation between the user power utilization equipment, mainly is meant restoring electricity of failure location, fault detect, Fault Isolation and non-fault zone.For containing the complicated feeder line of distributed power source or network configuration; compare the circuit of simple looped network type and radial pattern; fault treating procedure only depends on the cooperation of field apparatus to be difficult to realize, and realizes interconnection switch opening and closing state, the distribution of line load and the problems such as equipment protection definite value under the back new network of recovery that restoring electricity of non-fault zone also will be considered a plurality of looped network points.
Summary of the invention
The present invention discloses a kind of feed line automatization system with protection definite value on-line tuning function; can change according to operation of power networks relay protection constant value is carried out in line computation and modification, realize containing the feeder automation of complicated 10kV distribution line of distributed power source or network configuration.
For achieving the above object, the technical scheme that the present invention takes is: a kind of feed line automatization system with protection definite value on-line tuning function comprises data management module, fault processing module, fixed value adjusting module; Data management module comprises tcp data segment, part of data acquisition; Fault processing module comprises failure diagnosis part, Fault Isolation part and fault recovery part;
Part of data acquisition is gathered the real-time running data of electrical network by tcp data segment; When circuit broke down, real-time current exceeds the protective current value will be triggered fault processing module and start working, and wherein: failure diagnosis is partly judged position of failure point and fault type;
The Fault Isolation part is isolated corresponding failure point according to fault diagnosis result; Fault recovery part is to the operation that restores electricity of non-fault zone;
The fixed value adjusting module changes according to electrical network to be calculated the definite value of protective device, and the foundation that issues as definite value of generating apparatus definite value table; Described electrical network variation comprises:
A. circuit hinders for some reason or overhauls the changes of operating modes that causes;
B. the user side transformer capacity changes in the circuit;
C. transformer station goes out wiretap definite value appearance variation;
Described definite value computing formula is: A=A
0* K * K
0/ B (1)
In the formula (1), A is the protection definite value of switch; A
0Once protection definite value for transformer station; Load proportion COEFFICIENT K=S/S
0S is a switching node place downstream load (kVA), S
0Total load (kVA) for circuit; K
0Be sensitivity coefficient; B is the current transformer ratio of switch.
After position of failure point is determined,, generate the troubleshooting strategy through the normal network topology analytical calculation of adopting in the prior art.The interconnection switch that the strategy content comprises the circuit number of breaking down, need the region quantity that restores electricity, restore electricity the power supply point numbering of selecting, the switch number that needs separating brake and needs to close a floodgate after isolating is numbered.The executive mode that Fault Isolation and non-fault zone restore electricity has dual mode available, is respectively to automatically perform with manual intervention to carry out.Automatically perform and to carry out according to the scheme that the troubleshooting strategy proposes, and the manual intervention implementation need be under staff's supervision, the scheme that modification or affirmation troubleshooting strategy propose.The fault recovery of fault processing module partly generates the restore electricity criterion of scheme of non-fault zone:
A. the fault point upstream region is by former power supply point or distributed power source power supply;
B. consider to change original priority during load transfer for circuit;
C. change residual capacity for circuit place transformer station or distributed power source;
The non-fault line of upstream, fault point is by the combined floodgate upstream switch, by former power supply point or distributed power source power supply; The non-fault line in downstream, fault point restores electricity by adjusting the combined floodgate interconnection switch.
Among the present invention, the tcp data segment of data management module promptly utilizes the communication interface of existing techniques in realizing, its communication protocol adopts the existing Ethernet clear transport protocol, and its advantage is that the user data of application layer data and serial port protocol is in full accord, does not have the format conversion problem.It supports optical fiber, radio station, multiple communication modes such as GSM, GPRS, to finish the collection of part of data acquisition to the distribution network service data.Part of data acquisition timed sending data acquisition dependent instruction, distribution network is transferred to part of data acquisition with real-time running data by tcp data segment, and then is sent to follow-up correlation module.The data acquisition instruction of part of data acquisition utilizes existing software engineering programming to realize.
As a kind of improvement; also comprise the storage part in the data management module among the present invention; the real-time power network service data that part of data acquisition collects, and the switch protection definite value that calculates of fixed value adjusting module are stored in the storage part with the form of database.In addition, but partly also storage protection action message and line load distribution wait other information to storage.Concrete, database adopts existing SQL Server technology to realize.
As a kind of improvement; also comprise the data monitoring part in the data management module of the present invention; the real-time power network service data that part of data acquisition collects; and the switch protection definite value that the fixed value adjusting module calculates is presented in the data monitoring part; data monitoring part provides visual operation interface for the staff, can check information such as the real-time grid service data that flows through each switching point and on off state by this interface user.The Presentation Function of data monitoring part can adopt existing display product to realize in conjunction with software programming.
As a kind of improvement, the present invention also comprises WEB issuing function module, comprises the IIS server in the WEB issuing function module, and the data, services that the IIS server provides is the webpage that contains real-time power network service data in the database.The WEB issuing function utilizes existing WEB distribution technology to realize that it provides another kind of data access mode for the staff, and other computer in the local area network (LAN) can be realized the real-time monitoring of operation of power networks by web page browsing.
As a kind of improvement; the present invention also comprises the report capability module; it serves as that the basis generates data sheet with the database in the storage part; consult the power distribution network service data more intuitively for WEB server user, system monitoring personnel or other staff, and the protection value data of protective device.Concrete, the generation of data sheet utilizes existing Excel to be support programs.
As a kind of improvement, the IIS server among the present invention in the WEB issuing function module reads data monitoring monitor data partly every 10 seconds, and the data, services webpage that is provided is upgraded, and this functional utilization software instruction is realized.
Preferably, in the definite value computing formula of fixed value adjusting module of the present invention, the once protection definite value A of transformer station
0, the downstream load kVA of switching node place, circuit total load S
0All set by artificial, be known quantity, the criterion of setting is for to set according to current system requirements.
Preferably, in the definite value computing formula (1) of fixed value adjusting module of the present invention, sensitivity coefficient K
0Equal 0.9.This setting value is the empirical value in this area, can reduce the tripping and the malfunction of switch.
As a kind of improvement, the data monitoring of data management module of the present invention partly is provided with remote control switch, the divide-shut brake of controllable switch.
In concrete the application, the diagnosis basis of failure diagnosis part of the present invention comprises:
A. switch I section current protection action;
B. switch II section current protection action;
C. switch breaking-closing operating;
The diagnostic result that meets above-mentioned diagnosis basis is: the fault point is arranged in the downstream circuit of step switch;
At above-mentioned diagnostic result, the isolated operation of Fault Isolation part is: the switch separating brake and the locking of control and fault point upstream and downstream adjacency.
Beneficial effect of the present invention is: by incorporate definite value on-line tuning functional module in feeder system; when fault generation or operation of power networks variation; automatically to relay protection constant value in line computation and modification; make the protection definite value be applicable to current system all the time, realized containing the feeder automation of complicated feeder line of distributed power source or network configuration.The present invention also provides and has been convenient to the monitoring interface checking and manage in addition, and can make things convenient for the management of feeder system for the runtime database platform of share and access, has improved the degree of automation.
Description of drawings
Figure 1 shows that feed line automatization system structural representation of the present invention;
Figure 2 shows that on-line tuning workflow diagram of the present invention.
Embodiment
For content of the present invention is become apparent more, be described further below in conjunction with the drawings and specific embodiments.
In conjunction with Fig. 1, the present invention includes data management module, fault processing module, fixed value adjusting module, WEB functional module, report capability module; Data management module comprises tcp data segment, part of data acquisition, storage part; Fault processing module comprises failure diagnosis part, Fault Isolation part and fault recovery part.
During concrete the application, part of data acquisition is arranged in the main website backstage, the electrical network field apparatus is provided with the in-situs tester device, and tcp data segment connects part of data acquisition and field apparatus detecting instrument, and part of data acquisition collects the real-time running data of electrical network field apparatus by tcp data segment.When circuit broke down, real-time current exceeded the protective current value, will trigger fault processing module and start working, and wherein: failure diagnosis is partly judged position of failure point and fault type; The Fault Isolation part is isolated corresponding failure point then; The final fault recovered part is to the operation that restores electricity of non-fault zone; The fixed value adjusting module changes according to electrical network to be calculated the definite value of protective device, and generating apparatus definite value table is as the foundation of protecting definite value to issue.
The diagnosis basis of failure diagnosis part comprises:
A. switch I section current protection action;
B. switch II section current protection action;
C. switch breaking-closing operating;
The diagnostic result that meets above-mentioned diagnosis basis is: the fault point is arranged in the downstream circuit of step switch;
At the diagnostic result of failure diagnosis part, the isolated operation of Fault Isolation part is: the switch separating brake and the locking of control and fault point upstream and downstream adjacency.
After position of failure point is determined,, generate the troubleshooting strategy through the normal network topology analytical calculation of adopting in the prior art.The interconnection switch that the strategy content comprises the circuit number of breaking down, need the region quantity that restores electricity, restore electricity the power supply point numbering of selecting, the switch number that needs separating brake and needs to close a floodgate after isolating is numbered.The executive mode that Fault Isolation and non-fault zone restore electricity has dual mode available, is respectively to automatically perform with manual intervention to carry out.Automatically perform and to carry out according to the scheme that the troubleshooting strategy proposes, and the manual intervention implementation need be under staff's supervision, the scheme that modification or affirmation troubleshooting strategy propose.The fault recovery of fault processing module partly generates the restore electricity criterion of scheme of non-fault zone:
A. the fault point upstream region is by former power supply point or distributed power source power supply;
B. consider to change original priority during load transfer for circuit;
C. change residual capacity for circuit place transformer station or distributed power source.
The electrical network variation that triggers fixed value adjusting calculating comprises:
A. circuit hinders for some reason or overhauls the changes of operating modes that causes;
B. the user side transformer capacity changes in the circuit;
C. transformer station goes out wiretap definite value appearance variation.
Real-time power network service data, fault message, the customization that part of data acquisition of the present invention the collects protection definite value that module calculates of adjusting all can partly show by data monitoring, is convenient to checking of user and staff; The data monitoring part also is provided with the breaking-closing operating that remote control switch is used for switch.The customization protection definite value output that module calculates of adjusting is issued in the distribution network.Issuing of definite value can be realized by staff's control switch by customization transmitting order to lower levels switch partly is set at data monitoring, also can directly issue.
Part of data acquisition of the present invention collects to such an extent that real-time power network service data, fault message, protection definite value information all are stored in the data memory module, utilizes SQL Server to store with the form of database; The data sheet functional module serves as that the basis generates data sheet with this database, with checking of convenient user.WEB issuing function module can transfer to the data message of storage part among other non-at-scene user by local area network (LAN), is convenient to remote management and control.
The part that native system is realized by form of software is installed in the server of the control centre of Utilities Electric Co. or transformer station's night shift room, the software flow of fixed value adjusting module such as Fig. 2.
When electrical network breaks down, electric current〉current setting, the duration〉during the time setting value, detect overcurrent trip by FTU, generate fault-signal; If the reclosing success, then failure diagnosis part diagnostic result is a transient fault; If reclosing block, then diagnostic result is a permanent fault, and then the Fault Isolation module is finished the Fault Isolation of fault upstream; The fault recovery module is finished restoring electricity of non-fault zone.The FTU switch actuating signals is transferred to part of data acquisition in the time of troubleshooting, start the network topology routine analyzer, draw the fault zone, and whether upstream, detection failure zone successfully isolates through reclosing simultaneously, automatic or manual straighforward operation fault zone two end switch then, carry out Fault Isolation, confirm operation by the monitor staff simultaneously, form the troubleshooting strategy, processing policy both can automatically perform and restore electricity, also can carry out by carrying out manual confirmation after monitor staff's reference, until the fault down stream service restoration, electrical network is realized stable operation.
In conjunction with Fig. 2; if fault still was not eliminated in as 30 minutes in a period of time; perhaps electric network composition changed the time above 30 minutes; the fixed value adjusting module will be carried out topological analysis to new network; calculate the relay protection constant value of switchgear on circuit this moment; and generate and to confirm to issue by the staff for the definite value table of revising.The definite value computing formula is:
A=A
0×K×K
0/B （1）
In the formula (1), A is the protection definite value of switch; A
0Once protection definite value for transformer station; Load proportion COEFFICIENT K=S/S
0S is a switching node place downstream load (kVA), S
0Total load (kVA) for circuit; K
0Be sensitivity coefficient; B is the current transformer ratio of switch.The once protection definite value of transformer station A wherein
0, the downstream load S of switching node place, circuit total load S
0All set by artificial, be known quantity, the criterion of setting is for to set according to current system requirements.
If the staff revises the load of switch downstream in database or variation has taken place for definite value that transformer station goes out wiretap, the fixed value adjusting module can directly issue the new definite value table that calculates.
Concrete case study on implementation only is a preferable case study on implementation of the present invention described in the present invention, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be as technology category of the present invention.
Claims (10)
1. the feed line automatization system with protection definite value on-line tuning function is characterized in that, comprises data management module, fault processing module, fixed value adjusting module; Data management module comprises tcp data segment, part of data acquisition; Fault processing module comprises failure diagnosis part, Fault Isolation part and fault recovery part;
Part of data acquisition is gathered the real-time running data of electrical network by tcp data segment; When circuit breaks down, trigger fault processing module and start working, wherein:
Failure diagnosis is partly judged position of failure point and fault type;
The Fault Isolation part is isolated corresponding failure point according to fault diagnosis result;
Fault recovery part is to the operation that restores electricity of non-fault zone;
Electrical network change triggers fixed value adjusting module is calculated the definite value of protective device, and the foundation that issues as definite value of generating apparatus definite value table; Described electrical network variation comprises:
A. circuit hinders for some reason or overhauls the changes of operating modes that causes;
B. the user side transformer capacity changes in the circuit;
C. transformer station goes out wiretap definite value appearance variation;
Described definite value computing formula is:
A=A
0×K×K
0/B （1）；
In the formula (1), A is the protection definite value of switch; A
0Once protection definite value for transformer station; Load proportion COEFFICIENT K=S/S
0S is a switching node place downstream load (kVA); S
0Total load (kVA) for circuit; K
0Be sensitivity coefficient; B is the current transformer ratio of switch.
2. a kind of feed line automatization system according to claim 1 with protection definite value on-line tuning function; it is characterized in that; also comprise the storage part in the data management module, the real-time power network service data that part of data acquisition collects is stored in the storage part with the form of database.
3. a kind of feed line automatization system according to claim 1 with protection definite value on-line tuning function; it is characterized in that; also comprise the data monitoring part in the data management module, the real-time power network service data that part of data acquisition collects is presented in the data monitoring part.
4. a kind of feed line automatization system according to claim 2 with protection definite value on-line tuning function; it is characterized in that; also comprise WEB issuing function module; comprise the IIS server in the WEB issuing function module, the data, services that the IIS server provides is the webpage that contains data in the database.
5. according to claim 2 or 4 described a kind of feed line automatization systems, it is characterized in that also comprise the report capability module, it serves as that the basis generates data sheet with the database in the storage part with protection definite value on-line tuning function.
6. a kind of feed line automatization system according to claim 4 with protection definite value on-line tuning function; it is characterized in that; described IIS server reads data monitoring monitor data partly every 10 seconds, and the data, services webpage that is provided is upgraded.
7. a kind of feed line automatization system with protection definite value on-line tuning function according to claim 1 is characterized in that, in the described definite value computing formula, and the once protection definite value A of transformer station
0, the downstream load kVA of switching node place, circuit total load S
0All set by artificial.
8. a kind of feed line automatization system with protection definite value on-line tuning function according to claim 1 is characterized in that the sensitivity coefficient K in the formula (1)
0Equal 0.9.
9. a kind of feed line automatization system with protection definite value on-line tuning function according to claim 3 is characterized in that described data monitoring partly is provided with remote control switch, the divide-shut brake of controllable switch.
10. a kind of feed line automatization system with protection definite value on-line tuning function according to claim 1 is characterized in that the diagnosis basis of described failure diagnosis part comprises:
A. switch I section current protection action;
B. switch II section current protection action;
C. switch breaking-closing operating;
The diagnostic result that meets above-mentioned diagnosis basis is: the fault point is arranged in the downstream circuit of step switch;
At above-mentioned diagnostic result, the isolated operation of Fault Isolation part is: the switch separating brake and the locking of control and fault point upstream and downstream adjacency.
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| CN102723784A (en) * | 2012-06-20 | 2012-10-10 | 湖州电力局 | IEC 61850-based transformer protection fixed value automatic generation system and setting-free implementation method |
| CN103855692A (en) * | 2014-03-27 | 2014-06-11 | 贵州电网公司六盘水供电局 | Method for acquiring multi-partition relay protection setting value |
| CN103903075A (en) * | 2012-12-26 | 2014-07-02 | 浙江省电力公司 | Protection device constant value automatic management method based on fuzzy matching |
| CN104242237A (en) * | 2013-06-21 | 2014-12-24 | 国家电网公司 | Protection constant value input equipment and protection constant value input method |
| CN104391228A (en) * | 2014-12-03 | 2015-03-04 | 国家电网公司 | System and method for automatically detecting functions of feeder line |
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| CN104537465A (en) * | 2014-12-11 | 2015-04-22 | 国家电网公司 | Determining method and device of setting current of power distribution network |
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| CN102723784A (en) * | 2012-06-20 | 2012-10-10 | 湖州电力局 | IEC 61850-based transformer protection fixed value automatic generation system and setting-free implementation method |
| CN103903075A (en) * | 2012-12-26 | 2014-07-02 | 浙江省电力公司 | Protection device constant value automatic management method based on fuzzy matching |
| CN103903075B (en) * | 2012-12-26 | 2020-03-17 | 浙江省电力公司 | Protection device constant value automatic management method based on fuzzy matching |
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