CN2365802Y - Short-distance connecting line cipher locking protector - Google Patents
Short-distance connecting line cipher locking protector Download PDFInfo
- Publication number
- CN2365802Y CN2365802Y CN 99237097 CN99237097U CN2365802Y CN 2365802 Y CN2365802 Y CN 2365802Y CN 99237097 CN99237097 CN 99237097 CN 99237097 U CN99237097 U CN 99237097U CN 2365802 Y CN2365802 Y CN 2365802Y
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- CN
- China
- Prior art keywords
- short
- utility
- model
- protection
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an electric line short circuit protective device, particularly a cipher lockout protective device which is used for protecting short distance liaison line. The device reaches the purpose of automatic protection through the mutual cooperation among a relay, a transmitting device and a receiving device when the short circuit occurs in the line. The utility model has the advantages of little investment of longitudinal difference protection, sensitivity and high reliability compared with tradition, is free from external interference and is especially suitable for electric line in a mountain area.
Description
The utility model relates to a kind of power line short-circuit protective device, particularly a kind of password locking protective device that is used to protect the protection of short distance interconnector.
The quick acting of protective relaying device, the quick removing of electrical equipment fault is the stability that improves electric power system, alleviates the device damage degree and reduces one of effective measures of breakdown loss.In electric pressure electrical networks at different levels, to have adopted to have full line speed and cut carrier current protection, longitudinal difference protection etc., the part protection is along with the route protection scope then could be excised with certain time-delay; Though longitudinal difference protection can be realized the full line speed of line fault and cut; but along with development of electric power industry; increasing high pressure and superhigh pressure short-term group have appearred; longitudinal difference protection is done its main protection; employing is passage with the lead; it is very inconvenient to safeguard in the mountain area, is subject to external interference, has a strong impact on the safe and reliable operation of protection.
The purpose of this utility model provides a kind of line fault full line speed of realizing and cuts, and is easy to maintenance, is not subject to external interference, the short distance interconnector password locking protective device that operational reliability is high.
The purpose of this utility model is achieved in that a kind of short distance interconnector password locking protective device; comprise directional power relay, A, C phase current starting relay and trip(ping) circuit on the circuit, be between the current start relay, to be provided with sender unit and corresponding with it signal receiving device in trip(ping) circuit and A, C.
Short distance interconnector password locking protective device provided by the utility model is owing to the structure that adopts wireless transmission and receiving system to be used, and having overcome the employing lead is passage inconvenient maintenance in the mountain area, is subject to the problem of external interference.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is of the present utility model side password locking protection figure.
Fig. 2 is offside password locking protection figure of the present utility model.
Fig. 3 is short distance interconnector figure.
A one side in power station is called this side in the utility model, is called offside with the corresponding power station B of power station A.GJ is a directional power relay, LJ
ABe A phase current starting relay, LJ
CBe C phase current starting relay, LJ
OBe zero-sequence current starting relay, T
1, T
2Be respectively basis, side joint receiving apparatus, R
1, R
2Be respectively basis, offside emitter.
When short on line road single phase ground fault fault, as D
1Point, both sides GJ closure, both sides LJ
OClosed; Offside R
2With this side R
1Start simultaneously and transmit this side T
1With offside T
2Connect signal respectively, the loop is closed after logic, starts trip(ping) circuit T, makes the both sides switch trip, reaches the purpose that full line speed is cut.
When two-phase or three-phase ground short circuit fault, both sides LJ take place on short on line road
A, LJ
CClosed; LJ during ground connection
OClosure, both sides GJ closure, offside R
2With this side R
1Start simultaneously and transmit this side T
1With offside T
2Difference received signal, loop are closed behind snoop logic, start trip(ping) circuit T, make the both sides switch trip, reach the purpose that full line speed is cut.
When fault occurs in outside the short on line road, as D
3Point, outside this side protection range, this side GJ closure, LJ
A, LJ
CAnd LJ
OClosure, R
1Startup transmits, but does not start T because of offside GJ has directivity
2Do not receive, the loop disconnects, R
2Do not launch T
1Do not receive, reach the locking purpose, so the both sides switch does not all trip.
When fault occurs in D
2Point, within the offside protection range, offside GJ closure, LJ
A, LJ
COr LJ
OClosure, R
2Startup transmits, but does not start T because of this side GJ is with directivity
1Receive, the loop is off-state, R
1, T
2All do not launch and receive, reach the locking purpose, so the both sides switch does not all trip.
Emitter R of the present utility model
1, R
2With receiving system T
1, T
2Adopt radio transmission, in transmitting and receiving process, carry out encoding process, make device can not produce misoperation.
Claims (1)
1, a kind of short distance interconnector password locking protective device; comprise directional power relay, A, C phase current starting relay and trip(ping) circuit on the circuit, it is characterized in that between the current start relay, being provided with sender unit and corresponding with it signal receiving device in trip(ping) circuit and A, C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 99237097 CN2365802Y (en) | 1999-01-21 | 1999-01-21 | Short-distance connecting line cipher locking protector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 99237097 CN2365802Y (en) | 1999-01-21 | 1999-01-21 | Short-distance connecting line cipher locking protector |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2365802Y true CN2365802Y (en) | 2000-02-23 |
Family
ID=34024816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 99237097 Expired - Fee Related CN2365802Y (en) | 1999-01-21 | 1999-01-21 | Short-distance connecting line cipher locking protector |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2365802Y (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101355248B (en) * | 2001-08-27 | 2010-12-08 | 株式会社东芝 | Protective relay system |
-
1999
- 1999-01-21 CN CN 99237097 patent/CN2365802Y/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101355248B (en) * | 2001-08-27 | 2010-12-08 | 株式会社东芝 | Protective relay system |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |