CN106711965B - A kind of transmission line of electricity broken string method of discrimination based on semaphore transmitting - Google Patents
A kind of transmission line of electricity broken string method of discrimination based on semaphore transmitting Download PDFInfo
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- CN106711965B CN106711965B CN201611119602.4A CN201611119602A CN106711965B CN 106711965 B CN106711965 B CN 106711965B CN 201611119602 A CN201611119602 A CN 201611119602A CN 106711965 B CN106711965 B CN 106711965B
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention disclose it is a kind of based on semaphore transmitting transmission line of electricity break method of discrimination, include the following steps: step 1, transmission line of electricity two sides acquire the side three-phase current and three-phase voltage respectively, and judge the side whether certain mutually without stream or certain be mutually capacitance current；Step 2, if certain side there are certain mutually without stream or certain be mutually capacitance current the case where, to the other side send this mutually without stream or capacitance current monitoring signal；Step 3, it is mutually capacitance current without same phase is judged whether after stream perhaps capacitance current monitoring signal without stream or same phase that the other side, which receives certain, if so, determining transmission line of electricity, this mutually breaks.Such method can help in heavy current grounding system, and relay protection effectively cuts off disconnection fault.
Description
Technical field
The invention belongs to field of relay protection in power, in particular to a kind of transmission line of electricity based on semaphore transmitting is disconnected
Line method of discrimination.
Background technique
In heavy current grounding system, transmission line of electricity is single-phase or two-phase broken string belongs to disconnected phase state, it is formed with short circuit
Short circuits are different, belong to open conductors.Although disconnection fault is serious without short trouble, also rotating electric machine and system are transported
Capable and relay protection has certain influence.If disconnection fault cannot effectively be cut off, route will be in non-full-operating state, appearance
Negative phase-sequence, zero-sequence current may cause relay protection of power system leapfrog movement, and scope of power outage is caused to expand.
In the line protective devices of external certain producers, it is configured with the element of circuit breaking monitoring function, but it is such
Element it is excessive depend on definite value, be affected by the operating condition of system, be not suitable for the domestic current method of operation, do not meet
Definite value standardization of device etc. requires.
Therefore, it is necessary to further investigate to this problem, the method for discrimination of transmission line of electricity broken string is proposed.
Summary of the invention
The purpose of the present invention is to provide a kind of transmission line of electricity broken string method of discrimination based on semaphore transmitting, can have
Help in heavy current grounding system, relay protection effectively cuts off disconnection fault.
In order to achieve the above objectives, solution of the invention is:
A kind of transmission line of electricity broken string method of discrimination based on semaphore transmitting, includes the following steps:
Step 1, transmission line of electricity two sides acquire the side three-phase current and three-phase voltage respectively, and judge the side whether certain mutually without
It flows or certain is mutually capacitance current；
Step 2, if certain side there are certain mutually without stream or certain be mutually capacitance current the case where, to the other side send this mutually without
Stream or capacitance current monitor signal；
Step 3, the other side receive certain mutually without stream or capacitance current monitoring signal after, judge whether same Xiang Wuliu or
The same phase of person is capacitance current, if so, determining transmission line of electricity, this mutually breaks.
In above-mentioned steps 1, judge that the side is with the presence or absence of the method for certain Xiang Wuliu: if the side phase current has less than route
Threshold value is flowed, then the side Xiang Wuliu.
In above-mentioned steps 1, judge whether the side has certain mutually and be the method for capacitance current to be: if the side phase current is not less than
Route has a stream threshold value, and electric current leading voltage is close to 90 degree, then the side this be mutually capacitance current.
In above-mentioned steps 1, current transformer is installed respectively in transmission line of electricity two sides, to acquire three-phase current.
In above-mentioned steps 1, voltage transformer is installed respectively in transmission line of electricity two sides, to acquire three-phase voltage.
After adopting the above scheme, the broken string monitoring signal that the present invention combines this side electrical quantity and the other side to send, by system
Operating condition influence is small, and relay protection is not necessarily to newly-increased definite value, can accurately differentiate whether transmission line of electricity is in broken string state, mainly
Pilot protection suitable for route two sides exchange semaphore.
Detailed description of the invention
Fig. 1 is general flow chart of the invention；
Fig. 2 is specific flow chart of the invention.
Specific embodiment
Below with reference to attached drawing, technical solution of the present invention is described in detail.
As depicted in figs. 1 and 2, the present invention provides a kind of transmission line of electricity broken string method of discrimination based on semaphore transmitting, right
For any side, include the following steps:
Step 1, by installing current transformer and voltage transformer on the transmission line, this side three of transmission line of electricity is acquired
Phase currentWith this side three-phase voltage
Step 2, judge this side whether certain mutually without stream or certain be mutually capacitance current；
Wherein, judge this side is with the presence or absence of the method for certain Xiang Wuliu:
If this side A phase current, which is less than route, stream threshold value:Then this side A Xiang Wuliu；
If this side B phase current, which is less than route, stream threshold value:Then this side B Xiang Wuliu；
If this side C phase current, which is less than route, stream threshold value:Then this side C Xiang Wuliu；
Wherein,Respectively this side A, B, C phase current magnitude, IminThere is stream threshold value for route.
Wherein, judge whether this side has certain mutually and be the method for capacitance current to be:
If this side A phase current has stream threshold value not less than route:And electric current leading voltage is close to 90 degree:Then this side A phase is capacitance current；
If this side B phase current has stream threshold value not less than route:And electric current leading voltage is close to 90 degree:Then this side B phase is capacitance current；
If this side C phase current has stream threshold value not less than route:And electric current leading voltage is close to 90 degree:Then this side C phase is capacitance current；
Wherein,Respectively this side A, B, C phase current magnitude, IminThere is stream threshold value for route,Respectively this side A, B, C phase current leading voltage angle, Respectively originally
Side A, B, C phase voltage amplitude, δ are a lesser angle, can be set as needed.
Step 3, certain mutually perhaps sends this mutually without stream or capacitor electricity to opposite side for capacitance current without stream if meeting this side
Stream monitoring signal, and judge whether this side receives the same phase that opposite side is sent and monitor signal without stream or capacitance current；
Step 4, there is certain mutually without flowing or for capacitance current if meeting this side, and receive the same Xiang Wuliu that opposite side is sent
Or capacitance current monitors signal, then determining transmission line of electricity, this mutually breaks.
The above examples only illustrate the technical idea of the present invention, and this does not limit the scope of protection of the present invention, all
According to the technical idea provided by the invention, any changes made on the basis of the technical scheme each falls within the scope of the present invention
Within.
Claims (5)
- The method of discrimination 1. a kind of transmission line of electricity based on semaphore transmitting breaks, it is characterised in that include the following steps:Step 1, transmission line of electricity two sides acquire the side three-phase current and three-phase voltage respectively, and judge the side whether certain Xiang Wuliu or Person is mutually capacitance current；Step 2, if certain side there are certain mutually without stream or certain be mutually capacitance current the case where, to the other side send the Xiang Wuliu or Person's capacitance current monitors signal；Step 3, the other side receives certain mutually without judging whether same phase without stream or same after stream perhaps capacitance current monitoring signal One phase is capacitance current, if so, determining transmission line of electricity, this mutually breaks.
- The method of discrimination 2. a kind of transmission line of electricity based on semaphore transmitting as described in claim 1 breaks, it is characterised in that: institute It states in step 1, judges whether the method for certain Xiang Wuliu is for the side: if the side phase current is less than route and has stream threshold value, the side The Xiang Wuliu.
- The method of discrimination 3. a kind of transmission line of electricity based on semaphore transmitting as described in claim 1 breaks, it is characterised in that: institute State in step 1, judge the side whether certain be mutually the method for capacitance current be: if the side phase current has stream threshold not less than route Value, and electric current leading voltage is close to 90 degree, then the side this be mutually capacitance current.
- The method of discrimination 4. a kind of transmission line of electricity based on semaphore transmitting as described in claim 1 breaks, it is characterised in that: institute It states in step 1, current transformer is installed respectively in transmission line of electricity two sides, to acquire three-phase current.
- The method of discrimination 5. a kind of transmission line of electricity based on semaphore transmitting as described in claim 1 breaks, it is characterised in that: institute It states in step 1, voltage transformer is installed respectively in transmission line of electricity two sides, to acquire three-phase voltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611119602.4A CN106711965B (en) | 2016-12-08 | 2016-12-08 | A kind of transmission line of electricity broken string method of discrimination based on semaphore transmitting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611119602.4A CN106711965B (en) | 2016-12-08 | 2016-12-08 | A kind of transmission line of electricity broken string method of discrimination based on semaphore transmitting |
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| CN106711965A CN106711965A (en) | 2017-05-24 |
| CN106711965B true CN106711965B (en) | 2019-03-26 |
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| CN201611119602.4A Active CN106711965B (en) | 2016-12-08 | 2016-12-08 | A kind of transmission line of electricity broken string method of discrimination based on semaphore transmitting |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394755A (en) * | 2017-06-30 | 2017-11-24 | 南京南瑞继保电气有限公司 | A kind of guard method for avoiding the unordered action of transmission line of electricity broken string |
| CN109378797B (en) * | 2018-09-17 | 2020-09-18 | 深圳供电局有限公司 | High-voltage overhead line disconnection protection and identification method |
| CN110703142B (en) * | 2019-09-27 | 2022-04-08 | 许昌许继软件技术有限公司 | Method for identifying circuit disconnection of isolation amplifier and direct current protection system |
| CN110676826B (en) * | 2019-11-28 | 2021-03-23 | 国网江苏省电力有限公司镇江供电分公司 | Line disconnection protection method for comparing vector difference of voltages at two sides of line and application |
| CN111614065B (en) * | 2020-05-07 | 2022-03-29 | 国网四川省电力公司 | Line disconnection protection method based on line parameter identification |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102937687A (en) * | 2012-10-26 | 2013-02-20 | 杨万钟 | Method for distinguishing disconnection fault and grounding fault during grounding of neutral point through small resistor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4869988B2 (en) * | 2007-03-09 | 2012-02-08 | 中部電力株式会社 | Distribution line disconnection section detection system and disconnection detection device used in this system |
| JP6419492B2 (en) * | 2014-09-03 | 2018-11-07 | 関西電力株式会社 | Disconnection detection device, disconnection detection method, and disconnection section identification system |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937687A (en) * | 2012-10-26 | 2013-02-20 | 杨万钟 | Method for distinguishing disconnection fault and grounding fault during grounding of neutral point through small resistor |
Non-Patent Citations (1)
| Title |
|---|
| 配电线路断线故障的分析;王庆华;《广西水利水电》;20110630(第6期);57-60 |
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