CN101615787A - A kind of relaying protection implementation method that is applied to cable line based on the line double-end data - Google Patents
A kind of relaying protection implementation method that is applied to cable line based on the line double-end data Download PDFInfo
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- CN101615787A CN101615787A CN200910163145A CN200910163145A CN101615787A CN 101615787 A CN101615787 A CN 101615787A CN 200910163145 A CN200910163145 A CN 200910163145A CN 200910163145 A CN200910163145 A CN 200910163145A CN 101615787 A CN101615787 A CN 101615787A
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Abstract
The invention discloses a kind of relaying protection implementation method that is applied to cable line, belong to field of relay protection in power based on the line double-end data.This method relates to a plurality of measuring units, performance element, and the communication part that connects other same apparatus and background data center.Measuring unit is a current transformer, voltage transformer; Performance element is an exit relay; Communication part comprise the technical grade bus of leading to background data center and with the communications portion of higher level's protective device, communicating by letter with higher level's relaying protection is block signal, with cable metal armor or screen as medium.In tree-shaped cable power supply circuit; when subordinate's branch line breaks down; whole superior system all can detect fault message; at this moment; the protective relaying device that detects fault message is sent out a block signal to the similar unit of higher level; after receiving block signal, 0.5 second of protected location locking is to escape the fault of this subordinate's branch line.Block signal is produced by a high frequency transmitter, comprises in the signal sending the position of signalling in tree-shaped electric power system.If the level of signal of receiving is lower than the grade of this device, then this device locking.Block signal also can be used Optical Fiber Transmission, and the generation of light and reception are finished by light-emitting diode and phototriode.When subordinate's protected location measures the fault amount, then send the light signal that locking is used, malfunction is avoided in locking higher level protection.
Description
Technical field:
The present invention relates to a kind of relaying protection implementation method that is applied to cable line, belong to field of relay protection in power based on the line double-end data.
Background technology:
The mesolow electrical power distribution system of China is non-bus cable distribution system at present; and transmission distance is extremely short; only rely on the one-end fault amount can't realize the correct operation of relaying protection at all; especially heavy construction job site distribution especially without ready patterns to follow, the selectivity of relay protection problem of the tree-shaped distribution system in this for a long time little area can't solve.
Summary of the invention:
The objective of the invention is to overcome the shortcoming of prior art, a kind of new method of tree-shaped cable distribution system protection is provided.
This method relates to a plurality of measuring units, performance element, and the communication part that connects other same apparatus and background data center.Measuring unit is a current transformer, voltage transformer; Performance element is an exit relay; Communication part comprise the technical grade bus of leading to background data center and with the communications portion of higher level's protective device; Communicating by letter with higher level's relaying protection is block signal, as medium, constitutes loop by the earth with cable metal armor or screen.In tree-shaped cable power supply circuit; when subordinate's branch line breaks down; whole superior system all can detect fault message; at this moment; the protective relaying device that detects fault message is sent out a block signal to the similar unit of higher level; after receiving block signal, 0.5 second of protected location locking is to escape the fault of this subordinate's branch line.Block signal is produced by a high frequency transmitter, comprises in the signal sending the position of signalling in tree-shaped electric power system.If the level of signal of receiving is lower than the grade of this device, then this device locking.Block signal also can be used Optical Fiber Transmission, and the generation of light and reception are finished by light-emitting diode and phototriode.When subordinate's protected location measures the fault amount, then send the light signal that locking is used, malfunction is avoided in locking higher level protection.
Description of drawings:
Fig. 1 is the functional structure chart based on the relaying protection implementation method of line double-end data.
Among Fig. 1: 1: higher level's relaying protection center processing unit 2: the transceiver 3 of higher level's relaying protection: cable armor or screen 4: the transceiver 5 of subordinate relaying protection unit: subordinate's relaying protection center processing unit 6: the earth 7: the circuit breaker 8 of higher level's circuit top assembling: the circuit breaker 9 of subordinate's circuit branch road one top assembling: higher level's transmission line 10: subordinate's transmission line branch road 1: subordinate's transmission line branch road two
Embodiment:
Now describe the utility model most preferred embodiment in conjunction with the accompanying drawings in detail:
Embodiment 1:
As shown in Figure 1, a kind of relaying protection implementation method based on the line double-end data that is applied to cable line relates to two relaying protection processing units 1,5 that are installed on the superior and the subordinate's circuit.Comprise the superior and the subordinate's relaying protection center processing unit and the transceiver 2,4 that matches with it.Wherein when the branch road among Fig. 11 breaks down; two-stage relaying protection center processing unit all can detect fault up and down; because transmission line 9 circuits are shorter; so fault-signal is for the superior and the subordinate relaying protection unit 1; 5 difference are little; in this case; because subordinate's relaying protection 5 has detected fault message; so send block signal by the transceiver 4 that matches with it to higher level's relaying protection unit 1 at once; block signal is coupled on the armor or screen 3 of cable by the transmitting terminal of transceiver; receiving terminal received signal by transceiver 2; by this signal 1 locking of higher level's relaying protection center processing unit was escaped this fault in 0.5 second; thereby assurance transmission line 9 can be powered reliably; if transceiver 4 is not received the block signal that the next stage protected location sends; then will send trip signal and start circuit breaker 28, cut branch road 1.Thereby assurance transmission line 9 and branch road 2 11 are reliably powered.
Embodiment 2:
With 2,3,4 in the scheme 1; 6 lockings of forming change optical fiber into signal transmission loop, after subordinate's relaying protection center processing unit measures fault-signal, send light signal at once; after higher level's protected location is received light signal, 0.5 second of automatic blocking, thereby the malfunction of avoiding the higher level to protect.
Claims (3)
1, a kind of relaying protection implementation method based on the line double-end data that is applied to cable line is characterized in that, may further comprise the steps:
A utilizes the data acquisition and processing (DAP) platform, gathers the electric parameters (electric current, voltage) of electric wiring operation.
B handles the data of gathering, and judges whether fault of power circuit.
C when finding the system failure, then sends block signal to upper level power supply branch road; detect the next stage protective relaying device simultaneously and whether send block signal, if receive block signal, 0.5 second of this device locking then; as do not have block signal, then be used as exit relay.
2, trigger signal generator sent when claim 1 described block signal was protective relaying device discovery line fault, and signal generator is coupled to signal on the armor or screen of cable, by the signal receiver reception of upper level protection.
3, claim 1 described block signal sends when being protective relaying device discovery line fault, and block signal also can be used Optical Fiber Transmission, and the generation of light and reception are finished by light-emitting diode and phototriode.When subordinate's protected location measures the fault amount, then send the light signal that locking is used, locking higher level protection avoids the higher level to protect malfunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910163145A CN101615787A (en) | 2009-08-18 | 2009-08-18 | A kind of relaying protection implementation method that is applied to cable line based on the line double-end data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910163145A CN101615787A (en) | 2009-08-18 | 2009-08-18 | A kind of relaying protection implementation method that is applied to cable line based on the line double-end data |
Publications (1)
| Publication Number | Publication Date |
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| CN101615787A true CN101615787A (en) | 2009-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910163145A Pending CN101615787A (en) | 2009-08-18 | 2009-08-18 | A kind of relaying protection implementation method that is applied to cable line based on the line double-end data |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447247A (en) * | 2011-12-08 | 2012-05-09 | 湖州电力局 | Optical fiber latching current protective device |
| CN110308367A (en) * | 2019-06-29 | 2019-10-08 | 许昌许继软件技术有限公司 | A kind of DC distribution net system, Fault Locating Method and fault location system |
-
2009
- 2009-08-18 CN CN200910163145A patent/CN101615787A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447247A (en) * | 2011-12-08 | 2012-05-09 | 湖州电力局 | Optical fiber latching current protective device |
| CN110308367A (en) * | 2019-06-29 | 2019-10-08 | 许昌许继软件技术有限公司 | A kind of DC distribution net system, Fault Locating Method and fault location system |
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Open date: 20091230 |