CN106655116A - Relay protection configuration method for overhead-GIL joint line - Google Patents
Relay protection configuration method for overhead-GIL joint line Download PDFInfo
- Publication number
- CN106655116A CN106655116A CN201610883707.0A CN201610883707A CN106655116A CN 106655116 A CN106655116 A CN 106655116A CN 201610883707 A CN201610883707 A CN 201610883707A CN 106655116 A CN106655116 A CN 106655116A
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- Prior art keywords
- gil
- protection
- sides
- sections
- current differential
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a relay protection configuration method for an overhead-GIL joint line. The method comprises the following steps of (1), mounting a potential transformer and a current transformer at two sides of a GIL; (2), configuring a current differential protection member on the GIL segment; (3), through the current differential protection member configured in the step (2), judging and positioning a fault point through different protection action behaviors; (4), configuring a protection signal communication device on transformer stations at two sides of the overhead-GIL joint line; and (5), configuring a blocking autorecloser of the overhead-GIL joint line. The relay protection configuration method aims at the overhead-GIL joint line; and a PT and a CT are mounted at two sides of the GIL, thereby increasing electric parameters in the line; a self uniform parameter of the GIL line segment is utilized for configuring routine line protection in the GIL segment, thereby realizing high identification accuracy and high fault positioning precision for the GIL fault segment in a relatively easy manner.
Description
Technical field
The invention belongs to technical field of electric power transmission, more particularly to a kind of relay protection configuration method.
Background technology
GIL is phase-splitting insulation, and transmitting loop is constituted by three from phase pipeline bus, respectively by length between 12m-18m
Standard module combine.As shown in Figure 1, it is by grounding shell 1, conductor 2, interior slider for its basic structure schematic diagram
3a, outer slider 3b, disc insulator 4, telescopic joint 6, connection conductor 7 are constituted.
Used as the advanced technology of transmission of electricity of the world today, GIL provides a compact, reliable, economic power Transmission mode,
With following features：Transmission capacity is big, loss is little, electromagnetic radiation is low, security is good, reliability is high, life-span length etc..But by
In current its price costly, complicated construction technique, cost is higher.GIL applications at home and abroad are increasingly extensive, but its is most
For short-range water power within 1km or nuclear power plant's outlet, at present in China, applied voltage grade highest GIL circuit is the Yellow River
The 800kV GIL outlets of La Xiwa power stations, but its length is only 450m.There is no the failure feelings for above-mentioned GIL both at home and abroad at present
The relevant report of condition and protection scheme.It is more and more in following meeting with the maturation and its incomparable premium properties of technology
For in electricity power engineering.
Grinding for GIL- aerial mixed line faults location technology and relay protection scheme project compatibility is there is no at present
Study carefully achievement.
At present the practical application of cable-transmission line is very universal, therefore for parameter lumpy line failure
The research of positioning and relay protection scheme scheme concentrates on cable-transmission line substantially.Mainly there are following two theories：
(1) traveling wave method is the method for obtaining position of failure point according to traveling wave theory, can be electric using single-ended or both-end
Amount.
(2) impedance method calculates the impedance of fault loop and then obtains failure using the power frequency quality of circuit one or both ends
Range measurement at present to adopt both-end method to obtain higher range accuracy with the maturation of communication of power system means more.
Cable-aerial mixed line is commonly used at home and abroad, and it is in the uneven aspect of parameter and object of the invention
GIL- aerial mixed lines have similarity.Because the parameter and operation characteristic of power cable have dramatically different with GIL, therefore,
Real protection allocation plan of cable-aerial mixed line etc. also cannot directly as the practice of GIL- overhead line hybrid lines according to
According to.
The labyrinth of GIL circuits, its parameter has significant difference, therefore the access of GIL with overhead transmission line and power cable
So that the line parameter circuit value of joint line is no longer uniform.It is traditional based on the Principles of Relay Protection of homogeneous line parameter, adjust and match somebody with somebody
The scheme of putting cannot meet the demand of GIL- overhead line hybrid lines.Traditional Fault Locating Method based on homogeneous line parameter is outstanding
It is likely to result in larger error in GIL sections；Simultaneously because the access of GIL, if trouble point can not be accurately positioned, can expand event
Barrier scope, substantially reduces the transmission reliability of circuit.
The content of the invention
The present invention provides a kind of built on stilts-GIL joint line relay protection configuration methods, to solve present in prior art
The problem of the accurate fault location of GIL- overhead line hybrid lines, lifts power grid security and power supply level.
For achieving the above object, the technical solution used in the present invention is：
Built on stilts-GIL joint line the relay protection configuration methods of one kind, comprise the following steps：
(1) voltage transformer summation current transformer is installed in GIL both sides；
(2) current differential protection is configured in GIL sections；
(3) current differential protection configured by step (2), it is comprehensive to be judged by the behavior of different protection acts, to failure
Point is positioned；
(4) in the both sides transformer station configuration protection signal communication means of built on stilts-GIL joint lines；
(5) the lock-reclosing lock logic of built on stilts-GIL joint lines is configured.
In the step (1), one group of voltage transformer summation current transformer is installed respectively in GIL sections both sides, for increasing
The point of joint line measurement, gathers the analog quantity at GIL sections two ends, and the analog quantity includes three-phase current and three-phase voltage.
Step (2) concretely comprise the following steps：
The system protection of the both sides transformer station of built on stilts-GIL joint lines is configured with the configuration of overhead transmission line or cable run
Unanimously；Including the current differential protection and breaker protection that are arranged at both sides transformer station；
Conventional route protection is set up in GIL sections, including the current differential protection for being arranged on GIL sections both sides, for positioning
The failure generation area of circuit.
Step (3) concretely comprise the following steps：
When built on stilts section circuit occurs singlephase earth fault, trouble point is being arranged at the current differential protection of both sides transformer station
Protection domain in, the current differential protection action of both sides transformer station；Trouble point is protected in the current differential for being arranged at GIL sections both sides
Outside the area of shield, the current differential protection for being arranged at GIL sections both sides is failure to actuate；
When GIL sections circuit occurs singlephase earth fault, trouble point is protected in the current differential for being arranged at both sides transformer station
In the protection domain of shield, the current differential protection action of both sides transformer station is arranged at；Trouble point is also being arranged at GIL sections two simultaneously
Outside the area of the current differential protection of side, the current differential protection action of GIL sections both sides is arranged at.
Step (4) concretely comprise the following steps：
In GIL both sides configuration protection information-communication device, the device outputs node signal for access protection cabinet, by it
Data signal is changed into, the route protection action message of GIL both sides is sent to into the transformer station of its offside, and using optical cable or multiple
With the pattern of 2M communication ports, transformer station is communicated with offside.
Step (5) concretely comprise the following steps：
When GIL sections circuit occurs singlephase earth fault, the 500kV circuit differential currents of GIL sections both sides are arranged at
After protection act, protection signal is sent into protection device lock-reclosing lock action corresponding to both sides transformer station.
Compared with prior art, the present invention has advantages below：
The present invention installs PT, CT for built on stilts and GIL joint lines in GIL both sides, increases electric parameters in circuit；Profit
With the GIL part of paths uniformity parameter of itself, conventional route protection is configured in GIL sections, just can be realized so as to be relatively easy to
Accuracy and fault location precision to the identification of GIL fault sections.
Effectively coordinated and the route protection of GIL joint lines between by the way that GIL sections route protection and whole piece are built on stilts, greatly
The ability to transmit electricity and reliability of built on stilts and GIL joint lines are improve greatly, are that the safe and reliable operation of its transmission of electricity escorts.
Description of the drawings
Fig. 1 is GIL structural representations；
Fig. 2 is the schematic diagram that voltage transformer summation current transformer is set up in GIL both sides；
Fig. 3 is the schematic diagram that traditional line protective devices are set up in GIL both sides；
Fig. 4 is the different ground connection point failure schematic diagrames of joint line；
Fig. 5 is protection signal communication device configuration schematic diagram；
Fig. 6 is protection cooperation logical schematic.
Specific embodiment
The present invention is further described with reference to embodiment.
Explanation of nouns：
GIL：Gas-insulated metal closed power transmission line (Gas Insulated Line-GIL) is a kind of using SF6 gas
High voltage, the high current power transmission equipment of body or SF6 and N2 Mixed gas insulations, shell and conductor coaxial arrangement.
PT：Voltage transformer, effect be by high-voltage variable be low-voltage, secondary side is generally 100V, such as be 10KVPT,
It is exactly 10KV/100V, PT secondary sides can not short circuit.
CT：Current transformer, is that high current is changed into into small current, and being typically changed into 5A or 1A, CT secondary side can not open
Road.
As shown in figures 2-6, the built on stilts-GIL joint line relay protection configuration methods of one kind of the invention, including following step
Suddenly：
(1) PT, CT are installed in GIL both sides
As shown in Fig. 2 installing CT, PT equipment respectively in GIL sections both sides, increase the point of joint line measurement, gather GIL two
The analog quantity of side, analog quantity includes the three-phase current and three-phase voltage at GIL sections two ends.
(2) current differential protection is configured in GIL sections
The system protection of the both sides transformer station of built on stilts-GIL joint lines is configured with the configuration of overhead transmission line or cable run
Unanimously, protect including the 500kV circuits differential current for being arranged at both sides transformer station, in such as Fig. 3Position, and
In 500kV breaker protections, such as Fig. 3Position.
Using the GIL part of paths uniformity parameter of itself, conventional route protection is set up in GIL sections, including being arranged on GIL sections
The 500kV circuits differential current protection of both sides, in such as Fig. 3Position；So as to be relatively easy to just can realize it is right
The accuracy and fault location precision of GIL fault sections identification.
(3) judge to position trouble point by protection act behavior
Such as Fig. 4, when built on stilts section circuit occurs singlephase earth fault (A or C points in figure), protection of the trouble point in figureProtection domain in,Protection act；Trouble point is in protectionArea outside,Protection is failure to actuate.
When there is singlephase earth fault (B points in figure) in GIL sections circuit, protection of the trouble point in figureGuarantor
In the range of shield,Protection act；Trouble point is simultaneously also in protectionArea outside,Protection act.
By the protection act of different device, the trouble point region protected can be accurately judged.
(4) protection signal communication device configuration
In order to the route protection action message of GIL both sides to be sent to the transformer station of its offside, special guarantor need to be configured
Shield information-communication device, the device for accessing protection cabinet outputs node signal, converts it into data signal, and Jing is logical
Letter passage is sent to offside；And using special optical cable or the pattern of multiplexing 2M communication ports, transformer station is communicated with offside.
Such as Fig. 5, GIL both sides are provided with a pair of protection communicator A, protection communicator B, respectively
(5) the lock-reclosing lock logic of joint line
Due to the characteristic of GIL, when GIL itself occurs earth fault, line protection reclosure action should be limited, in case
Only GIL equipment is breakdown, causes heavy losses；It is to improve multi-line power transmission reliability when trouble point is in trolley line section, can be with
Consideration enables reclosing.
When trouble point occurs in B points,After protection act, protection signal is sent to both sides transformer station phase
The protection device lock-reclosing lock action answered.
Only list the route protection configuration of the built on stilts-GIL joint lines of super-pressure (500kV) in Fig. 2-6 by way of example
Method, but invention achievement is equally applicable to the built on stilts-GIL joint lines of 220kV, 330kV, 750kV and 1000kV electric pressure.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
- It is 1. a kind of to make somebody a mere figurehead-GIL joint line relay protection configuration methods, it is characterised in that：Comprise the following steps：(1) voltage transformer summation current transformer is installed in GIL both sides；(2) current differential protection is configured in GIL sections；(3) current differential protection configured by step (2), it is comprehensive to be judged by the behavior of different protection acts, failure is clicked through Row positioning；(4) in the both sides transformer station configuration protection signal communication means of built on stilts-GIL joint lines；(5) the lock-reclosing lock logic of built on stilts-GIL joint lines is configured.
- It is 2. according to claim 1 to make somebody a mere figurehead-GIL joint line relay protection configuration methods, it is characterised in that：The step (1) in, one group of voltage transformer summation current transformer is installed respectively in GIL sections both sides, for increasing the point of joint line measurement, The analog quantity at collection GIL sections two ends, the analog quantity includes three-phase current and three-phase voltage.
- It is 3. according to claim 1 to make somebody a mere figurehead-GIL joint line relay protection configuration methods, it is characterised in that：The step (2) concretely comprise the following steps：The system protection of the both sides transformer station of built on stilts-GIL joint lines is configured with overhead transmission line or the configuration consistency of cable run； Including the current differential protection and breaker protection that are arranged at both sides transformer station；Conventional route protection is set up in GIL sections, including the current differential protection for being arranged on GIL sections both sides, for positioning line fault Failure generation area.
- It is 4. according to claim 1 to make somebody a mere figurehead-GIL joint line relay protection configuration methods, it is characterised in that：The step (3) concretely comprise the following steps：When there is singlephase earth fault in built on stilts section circuit, guarantor of the trouble point in the current differential protection for being arranged at both sides transformer station In the range of shield, the current differential protection action of both sides transformer station；Trouble point is in the current differential protection for being arranged at GIL sections both sides Outside area, the current differential protection for being arranged at GIL sections both sides is failure to actuate；When GIL sections circuit occurs singlephase earth fault, trouble point is in the current differential protection for being arranged at both sides transformer station In protection domain, the current differential protection action of both sides transformer station is arranged at；Trouble point is also being arranged at GIL sections both sides simultaneously Outside the area of current differential protection, the current differential protection action of GIL sections both sides is arranged at.
- It is 5. according to claim 1 to make somebody a mere figurehead-GIL joint line relay protection configuration methods, it is characterised in that：The step (4) concretely comprise the following steps：In GIL both sides configuration protection information-communication device, the device is outputed node signal, is converted for access protection cabinet Into data signal, the route protection action message of GIL both sides is sent to into the transformer station of its offside, and using optical cable or multiplexing 2M The pattern of communication port, transformer station is communicated with offside.
- It is 6. according to claim 1 to make somebody a mere figurehead-GIL joint line relay protection configuration methods, it is characterised in that：The step (5) concretely comprise the following steps：When GIL sections circuit occurs singlephase earth fault, the 500kV circuits differential current protection of GIL sections both sides is arranged at After action, protection signal is sent into protection device lock-reclosing lock action corresponding to both sides transformer station.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610883707.0A CN106655116B (en) | 2016-10-10 | 2016-10-10 | Aerial-GIL joint line the relay protection configuration method of one kind |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610883707.0A CN106655116B (en) | 2016-10-10 | 2016-10-10 | Aerial-GIL joint line the relay protection configuration method of one kind |
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| CN106655116B CN106655116B (en) | 2019-01-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907794A (en) * | 2017-11-21 | 2018-04-13 | 中国电力科学研究院有限公司 | A kind of extra-high voltage GIL aerial mixed line fault section recognition methods and device |
| CN109709447A (en) * | 2019-02-25 | 2019-05-03 | 南京南瑞继保电气有限公司 | A kind of mixed line fault localization method based on differential section discriminating gear |
| CN109709439A (en) * | 2019-02-25 | 2019-05-03 | 南京南瑞继保电气有限公司 | A kind of mixed line fault localization method based on joint acquisition unit |
| CN109782133A (en) * | 2019-02-25 | 2019-05-21 | 南京南瑞继保电气有限公司 | A kind of multistage cable-transmission line Fault Locating Method |
| CN109995010A (en) * | 2019-04-29 | 2019-07-09 | 南京南瑞继保电气有限公司 | A kind of induced current quick release device autocontrol method and system |
| CN110768219A (en) * | 2019-10-17 | 2020-02-07 | 许继集团有限公司 | GIL-overhead mixed line protection method and system |
| CN111077391A (en) * | 2019-12-20 | 2020-04-28 | 中国能源建设集团江苏省电力设计院有限公司 | Real-time monitoring system for GIL (Gate in line) |
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| CN205141644U (en) * | 2015-12-01 | 2016-04-06 | 中国电建集团成都勘测设计研究院有限公司 | Prevent circuit that short circuit of GIL equipment reclosed |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907794A (en) * | 2017-11-21 | 2018-04-13 | 中国电力科学研究院有限公司 | A kind of extra-high voltage GIL aerial mixed line fault section recognition methods and device |
| CN107907794B (en) * | 2017-11-21 | 2022-08-09 | 中国电力科学研究院有限公司 | Extra-high voltage GIL-overhead hybrid line fault section identification method and device |
| CN109709447A (en) * | 2019-02-25 | 2019-05-03 | 南京南瑞继保电气有限公司 | A kind of mixed line fault localization method based on differential section discriminating gear |
| CN109709439A (en) * | 2019-02-25 | 2019-05-03 | 南京南瑞继保电气有限公司 | A kind of mixed line fault localization method based on joint acquisition unit |
| CN109782133A (en) * | 2019-02-25 | 2019-05-21 | 南京南瑞继保电气有限公司 | A kind of multistage cable-transmission line Fault Locating Method |
| CN109995010A (en) * | 2019-04-29 | 2019-07-09 | 南京南瑞继保电气有限公司 | A kind of induced current quick release device autocontrol method and system |
| CN110768219A (en) * | 2019-10-17 | 2020-02-07 | 许继集团有限公司 | GIL-overhead mixed line protection method and system |
| WO2021073219A1 (en) * | 2019-10-17 | 2021-04-22 | 许继集团有限公司 | Method and system for protecting gil-overhead hybrid line |
| CN111077391A (en) * | 2019-12-20 | 2020-04-28 | 中国能源建设集团江苏省电力设计院有限公司 | Real-time monitoring system for GIL (Gate in line) |
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