MY172416A - Pilot wire differential protection appratatus for multi-end circuit based on phase comparison principle - Google Patents
Pilot wire differential protection appratatus for multi-end circuit based on phase comparison principleInfo
- Publication number
- MY172416A MY172416A MYPI2013700916A MYPI2013700916A MY172416A MY 172416 A MY172416 A MY 172416A MY PI2013700916 A MYPI2013700916 A MY PI2013700916A MY PI2013700916 A MYPI2013700916 A MY PI2013700916A MY 172416 A MY172416 A MY 172416A
- Authority
- MY
- Malaysia
- Prior art keywords
- phase
- relay
- pilot wire
- connecting ends
- differential protection
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/28—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
- H02H3/30—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel
- H02H3/302—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel involving phase comparison
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
- H02H1/0084—Details of emergency protective circuit arrangements concerning transmission of signals by means of pilot wires or a telephone network; watching of these wires
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A pilot wire differential protection apparatus and method for a power transmission and distribution lines including three or more connecting ends. The apparatus comprises: three or more TRANSLAY relays, which arc sequentially connected at the corresponding connecting ends of the power transmission and distribution lines, respectively. Summation transformers of the respective relays are connected to an a phase, a b phase, a c phase and a neutral point at the connecting ends of the corresponding protected circuits, and a pilot wire first connecting terminal and a pilot wire second connecting terminal of the respective relays (are connected with each other in parallel, respectively. Respective phase comparators compare corresponding phases of U1 and Un so as to obtain a phase difference, U1 is a voltage at a secondary winding side of the relay of the phase comparator, Un is a voltage at a auxiliary transformer side of the relay of the phase comparator. A false state in the lines is judged According to the phase difference Arg U1/Un. At each of the connecting ends, a pilots padding resistor Rpp of the relay is adjusted so that Rpp ? Rw = k* R0 is satisfied, k is a set constant, Rw is a resistance on the pilot wire, and Ro is a linear impedance of the TRANSLAY relay. When To<Tr or To>Tr, a value of k satisfies a condition of - n*k-1< -1 < - (n*k +n) *To l Tr + n ? 1 or a condition of - (n * k + n) * To lTr ++ n-1 <-1 < - n*k-1, respectively, To and Tr are number of turns of an operating w i nding and number of turns of a restraining winding in the relay, respectively.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210184733.6A CN103474971B (en) | 2012-06-06 | 2012-06-06 | Based on the multi-point circuit guide wire differential protection than facies principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MY172416A true MY172416A (en) | 2019-11-25 |
Family
ID=48805646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MYPI2013700916A MY172416A (en) | 2012-06-06 | 2013-05-31 | Pilot wire differential protection appratatus for multi-end circuit based on phase comparison principle |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN103474971B (en) |
| GB (1) | GB2504594B (en) |
| MY (1) | MY172416A (en) |
| SG (1) | SG195497A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2098417B (en) * | 1981-05-09 | 1984-10-24 | Northern Eng Ind | Pilot wire line protection systems |
| CN100350707C (en) * | 2004-12-02 | 2007-11-21 | 浙江大学 | Split-phase zero-sequence fault component braking method for preventing malfunction for transformer protection |
| CN100375357C (en) * | 2005-10-26 | 2008-03-12 | 许继集团有限公司 | Double end testing method in power transmission line longitudinal difference protection |
| WO2011060814A1 (en) * | 2009-11-17 | 2011-05-26 | Areva T&D Uk Limited | Fuzzy interference relay and method for current differential protection of a transmission line |
-
2012
- 2012-06-06 CN CN201210184733.6A patent/CN103474971B/en active Active
-
2013
- 2013-05-21 SG SG2013039243A patent/SG195497A1/en unknown
- 2013-05-31 MY MYPI2013700916A patent/MY172416A/en unknown
- 2013-06-03 GB GB1309864.5A patent/GB2504594B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103474971B (en) | 2016-03-23 |
| SG195497A1 (en) | 2013-12-30 |
| GB201309864D0 (en) | 2013-07-17 |
| GB2504594A (en) | 2014-02-05 |
| CN103474971A (en) | 2013-12-25 |
| GB2504594B (en) | 2016-04-06 |
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