CN104808102B - A kind of relay protection DC control circuit in-service monitoring and method for early warning - Google Patents
A kind of relay protection DC control circuit in-service monitoring and method for early warning Download PDFInfo
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- CN104808102B CN104808102B CN201510214048.7A CN201510214048A CN104808102B CN 104808102 B CN104808102 B CN 104808102B CN 201510214048 A CN201510214048 A CN 201510214048A CN 104808102 B CN104808102 B CN 104808102B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 230000007774 longterm Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The present invention provides a kind of relay protection DC control circuit in-service monitoring and method for early warning, and DC control circuit includes closing circuit and trip(ping) circuit；This comprises the following steps：Closing circuit monitoring branch road and trip(ping) circuit monitoring branch road are built respectively；Closing circuit monitors element selection and parameter tuning in branch road and trip(ping) circuit monitoring branch road；The current value that conjunction/trip(ping) circuit monitors branch road is flowed through in detection, and with conjunction/trip(ping) circuit break alarm current value ratio compared with judging conjunction/trip(ping) circuit with the presence or absence of breaking.The present invention monitors branch road by building conjunction/trip(ping) circuit, and on-line monitoring flows through the current value that conjunction/trip(ping) circuit monitors branch road, and judges that loop whether there is disconnection problem according to monitoring current size, so as to realize tripping operation and the integrity monitoring of closing circuit；This method can not only realize DC control circuit integrality full working scope monitoring, and will not it is normal to system operation impact.
Description
Technical field
The present invention relates to a kind of method for early warning, and in particular to a kind of relay protection DC control circuit in-service monitoring and early warning
Method.
Background technology
Relay protection hardware deficiency is the one of the main reasons for causing hidden failure to occur, and is drawn by DC control circuit defect
The protection incorrect operation risen accounts at a relatively high ratio, thus it is prevention that effective monitoring and early warning are carried out to DC control circuit
Hidden failure, the important means for reducing protection incorrect operation.DC control circuit loose contact, circuit breaking are to cause protection
The major reason of incorrect operation.Conventional traffic lights loop is directly monitored by or position relay normally-closed contact concatenation signal circuit
The method of indirect monitor, belongs to non-full working scope monitoring, and breaker closes conjunction (jump) lock loop after (jump) lock and loses monitoring.
The demand of intelligent grid is built in face of China, will realize it to power system device and the on-line monitoring in loop
One of important measure of target.Meanwhile, the continuous improvement of electronic component reliability index is also on-line monitoring method and measure
Application provide may.Document《Breaker operator loop design with trip circuit monitoring is with realizing》Indicate a kind of concatenation
Closing circuit still falls within non-full working scope monitoring in trip(ping) circuit the broken string monitoring scheme, but the program of high internal resistance relay.Meanwhile,
The concept of intelligent operation box is also suggested, but uses intelligent operation box in conventional substation, not only increases the complexity of system
Property nor it is economical.At present, also realize that DC control circuit is comprehensively and effectively monitored without ripe means.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of relay protection DC control circuit in-service monitoring
With method for early warning, branch road is monitored by building conjunction/trip(ping) circuit, on-line monitoring flows through the electric current that conjunction/trip(ping) circuit monitors branch road
Value, and judge that loop whether there is disconnection problem according to monitoring current size, so as to realize tripping operation and the integrality of closing circuit
Monitoring；This method can not only realize the integrality full working scope monitoring of DC control circuit, and will not be to the normal operation of system
Impact.
In order to realize foregoing invention purpose, the present invention is adopted the following technical scheme that：
The present invention provides a kind of relay protection DC control circuit in-service monitoring and method for early warning, the DC control circuit
Including closing circuit and trip(ping) circuit；It the described method comprises the following steps：
Closing circuit monitoring branch road and trip(ping) circuit monitoring branch road are built respectively；
Closing circuit monitors element selection and parameter tuning in branch road and trip(ping) circuit monitoring branch road；
The current value that conjunction/trip(ping) circuit monitors branch road is flowed through in detection, and with conjunction/trip(ping) circuit break alarm current value ratio
Compared with, judge conjunction/trip(ping) circuit with the presence or absence of broken string.
The closing circuit includes combined floodgate guard relay normally opened contact, the first automatic closing contact, first manual combined floodgate
Contact, combined floodgate guard relay, anti-trip relay contact, the first breaker normally closed auxiliary contact, closing coil and trip position
Relay.
After the combined floodgate guard relay normally opened contact, the first automatic closing contact, first manual closing contact are in parallel, with
The combined floodgate guard relay, anti-trip relay contact, the first breaker normally closed auxiliary contact and closing coil are sequentially connected in series, institute
Tripping position relay one end connection direct current operative power source is stated, the other end connects closing line through the first breaker normally closed auxiliary contact
Circle.
First additional monitoring resistor, the first Hall current sensor, the normally opened auxiliary contact of the first breaker and closing circuit
In closing coil be followed in series to form closing circuit monitoring branch road.
The trip(ping) circuit includes tripping operation guard relay normally opened contact, the second automatic trip contact, the second hand trip(ping)
Contact, tripping operation guard relay, the normally opened auxiliary contact of the second breaker, breaking coil and closing operation position relay.
After the tripping operation guard relay normally opened contact, the second automatic trip contact, the second manual trip contact are in parallel, with
The tripping operation guard relay, the normally opened auxiliary contact of the second breaker, breaking coil are sequentially connected in series, the closing operation position relay
One end connects direct current operative power source, and the other end connects breaking coil through the normally opened auxiliary contact of the second breaker.
Second additional monitoring resistor, the second Hall current sensor, the second breaker normally closed auxiliary contact and trip(ping) circuit
In breaking coil be followed in series to form trip(ping) circuit monitoring branch road.
First Hall current sensor and the second Hall current sensor are using magnetic balance type Hall current sensing
Device.
The selection of element and the tuning process of parameter are as follows in closing circuit monitoring branch road：
(1) when breaker is in closing position, the first breaker normally closed auxiliary contact disconnects and the first breaker is normally opened auxiliary
Help the closing of contact, now the first additional monitoring resistor through the first Hall current sensor, the normally opened auxiliary contact of the first breaker with
Closing coil constitutes path L1, ignores the internal resistance of the first Hall current sensor, uses UnDC control circuit rated voltage is represented,
RcRepresent closing coil resistance, it is known that the resistance R of the first additional monitoring resistor1Meet：
Then R can be obtained1≥21Rc, according to the resistance R of the first additional monitoring resistor1Scope, selection first it is additional monitoring electricity
Hinder, and require that the rated power of the first additional monitoring resistor is more than and actually bear more than twice of power, to ensure its permanent worker
The reliability of work；
(2) understand that closing circuit monitors the long-term work electric current I of branch road according to the first additional monitoring resistor of selectioncFor：
According to IcSize select the first Hall current sensor；
(3) the contact resistance R of closing circuithRepresent, ignore the internal resistance of combined floodgate guard relay, in order to ensure breaker
It is reliable to close a floodgate, RhNeed to meet：
Then R can be obtainedh≤0.25Rc；
Closing circuit break alarm current value IhRepresent, then have：
The selection of element and the tuning process of parameter are as follows in trip(ping) circuit monitoring branch road：
(1) when breaker is in trip position, the normally opened auxiliary contact of the second breaker disconnect and the second breaker is normally closed auxiliary
Help the closing of contact, now the second additional monitoring resistor through the second Hall current sensor, the second breaker normally closed auxiliary contact with
Breaking coil constitutes path L2, ignores the internal resistance of the second Hall current sensor, uses UnDC control circuit rated voltage is represented,
RdRepresent breaking coil resistance, it is known that the resistance R of the second additional monitoring resistor2Meet：
Then R can be obtained2≥21Rd, according to the resistance R of the second additional monitoring resistor2Scope, selection second it is additional monitoring electricity
Hinder, and require that the rated power of the second additional monitoring resistor is more than and actually bear more than twice of power, to ensure its permanent worker
The reliability of work；
(2) understand that trip(ping) circuit monitors the long-term work electric current I of branch road according to the second additional monitoring resistor of selectiondFor：
According to IdSize select the second Hall current sensor；
(3) the contact resistance R of trip(ping) circuittRepresent, ignore the internal resistance of tripping operation guard relay, in order to ensure breaker
Reliable trip, RtNeed to meet：
Then R can be obtainedt≤0.25Rd；
Trip(ping) circuit break alarm current value ItRepresent, then have：
When breaker is in "on" position, the current value that closing circuit monitors branch road is flowed through in monitoring, and by the conjunction of monitoring
The current value and closing circuit break alarm current value I of lock loop monitoring branch roadhCompare, if closing circuit monitors the electric current of branch road
Value is less than closing circuit break alarm current value Ih, then judge that loose contact or circuit breaking failure occurs in closing circuit, send
Alarm signal.
When breaker is in tripped condition, the current value that trip(ping) circuit monitors branch road is flowed through in monitoring, and by the jump of monitoring
The current value and trip(ping) circuit break alarm current value I of lock loop monitoring branch roadtCompare, if trip(ping) circuit monitors the electric current of branch road
Value is less than trip(ping) circuit break alarm current value It, then judge that circuit breaking failure occurs in trip(ping) circuit, send alarm signal.
Compared with prior art, the beneficial effects of the present invention are：
The present invention realizes the integrality full working scope monitoring of DC control circuit, can overcome closing circuit mistake in the prior art
Monitoring and trip(ping) circuit is gone to lose the deficiency of monitoring；
The monitoring sensitivity of the present invention is high, can effectively find DC control circuit loose contact, circuit breaking problem；
The present invention uses Hall current sensor, realizes that conjunction/trip(ping) circuit is monitored between branch road and conjunction/trip(ping) circuit completely
It is electrically isolated, the main system of breaker will not be normally run and impacted, and precision is high, response is fast, small volume.
Brief description of the drawings
Fig. 1 is closing circuit and closing circuit monitoring branch structure figure in the embodiment of the present invention；
Fig. 2 is trip(ping) circuit and trip(ping) circuit monitoring branch structure figure in the embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The present invention provides a kind of relay protection DC control circuit in-service monitoring and method for early warning, the DC control circuit
Including closing circuit and trip(ping) circuit；It the described method comprises the following steps：
Closing circuit monitoring branch road and trip(ping) circuit monitoring branch road are built respectively；
Closing circuit monitors element selection and parameter tuning in branch road and trip(ping) circuit monitoring branch road；
The current value that conjunction/trip(ping) circuit monitors branch road is flowed through in detection, and with conjunction/trip(ping) circuit break alarm current value ratio
Compared with, judge conjunction/trip(ping) circuit with the presence or absence of broken string.
Such as Fig. 1, the closing circuit include combined floodgate guard relay normally opened contact HBJ, the first automatic closing contact ZHJ,
The normally closed auxiliary of first manual closing contact SHJ, combined floodgate guard relay HBJ, anti-trip relay contact TBJV, the first breaker is touched
Point QF1, closing coil HQ and tripping position relay TWJ.
The combined floodgate guard relay normally opened contact HBJ, the first automatic closing contact ZHJ, first manual closing contact ZHJ
After parallel connection, with the combined floodgate guard relay HBJ, anti-trip relay contact TBJV, the first breaker normally closed auxiliary contact QF1 and
Closing coil HQ is sequentially connected in series, and described tripping position relay TWJ one end connects direct current operative power source+KW, and the other end is through first
Breaker normally closed auxiliary contact QF1 connection closing coils HQ.
First additional monitoring resistor R1, the first Hall current sensor HL1, the normally opened auxiliary contact QF2 of the first breaker with
Closing coil HQ in closing circuit is followed in series to form the closing circuit monitoring branch road.
Such as Fig. 2, the trip(ping) circuit includes tripping operation guard relay normally opened contact TBJ, the second automatic trip contact TJ, the
Two manual trip contact STJ, tripping operation guard relay TBJ, the normally opened auxiliary contact QF3 of the second breaker, breaking coil TQ and conjunction
Gate position relay HWJ.
The tripping operation guard relay normally opened contact, the second automatic trips of TBJ contact TJ, the second manual trip contact STJ
After parallel connection, it is sequentially connected in series with the tripping operation guard relay TBJ, the normally opened auxiliary contact QF3 of the second breaker, breaking coil TQ,
Described closing operation position relay HWJ one end connects direct current operative power source+KW, and the other end is through the normally opened auxiliary contact of the second breaker
QF3 connection breaking coils TQ.
Second additional monitoring resistor R2, the second Hall current sensor HL2, the second breaker normally closed auxiliary contact QF4 with
Breaking coil TQ in trip(ping) circuit is followed in series to form the trip(ping) circuit monitoring branch road.
The first Hall current sensor HL1 and the second Hall current sensor HL2 are using magnetic balance type Hall electricity
Flow sensor.
The selection of element and the tuning process of parameter are as follows in closing circuit monitoring branch road：
(1) when breaker is in closing position, the first breaker normally closed auxiliary contact disconnects QF1 and the first breaker is normally opened
Auxiliary contact QF2 is closed, and now the first additional monitoring resistor R1 is normally opened through the first Hall current sensor HL1, the first breaker
Auxiliary contact QF2 constitutes path L1 with closing coil, ignores the first Hall current sensor HL1 internal resistance, uses UnRepresent direct current
Operation circuit rated voltage, RcRepresent closing coil resistance, it is known that the resistance R of the first additional monitoring resistor1Meet：
Then R can be obtained1≥21Rc, according to the resistance R of the first additional monitoring resistor1Scope, selection first it is additional monitoring electricity
R1 is hindered, and requires that the first additional monitoring resistor R1 rated power is more than and is actually born more than twice of power, to ensure that it is grown
The reliability of phase work；
(2) understand that closing circuit monitors the long-term work electric current I of branch road according to the first additional monitoring resistor R1 of selectionc
For：
According to IcSize select the first Hall current sensor HL1；
(3) the contact resistance R of closing circuithRepresent, ignore the internal resistance of combined floodgate guard relay, in order to ensure breaker
It is reliable to close a floodgate, RhNeed to meet：
Then R can be obtainedh≤0.25Rc；
Closing circuit break alarm current value IhRepresent, then have：
The selection of element and the tuning process of parameter are as follows in trip(ping) circuit monitoring branch road：
(1) when breaker is in trip position, the normally opened auxiliary contact QF3 of the second breaker disconnects and the second breaker is normally closed
Auxiliary contact QF4 is closed, and now the second additional monitoring resistor R2 is normally closed through the second Hall current sensor HL2, the second breaker
Auxiliary contact QF4 constitutes path L2 with breaking coil, ignores the internal resistance of the second Hall current sensor, uses UnRepresent DC operation
Loop rated voltage, RdRepresent breaking coil resistance, it is known that the resistance R of the second additional monitoring resistor2Meet：
Then R can be obtained2≥21Rd, according to the resistance R of the second additional monitoring resistor2Scope, selection second it is additional monitoring electricity
R2 is hindered, and requires that the second additional monitoring resistor R2 rated power is more than and is actually born more than twice of power, to ensure that it is grown
The reliability of phase work；
(2) understand that trip(ping) circuit monitors the long-term work electric current I of branch road according to the second additional monitoring resistor R2 of selectiond
For：
According to IdSize select the second Hall current sensor HL2；
(3) the contact resistance R of trip(ping) circuittRepresent, ignore the internal resistance of tripping operation guard relay, in order to ensure breaker
Reliable trip, RtNeed to meet：
Then R can be obtainedt≤0.25Rd；
Trip(ping) circuit break alarm current value ItRepresent, then have：
When breaker is in "on" position, the current value that closing circuit monitors branch road is flowed through in monitoring, and by the conjunction of monitoring
The current value and closing circuit break alarm current value I of lock loop monitoring branch roadhCompare, if closing circuit monitors the electric current of branch road
Value is less than closing circuit break alarm current value Ih, then judge that loose contact or circuit breaking failure occurs in closing circuit, send
Alarm signal.
When breaker is in tripped condition, the current value that trip(ping) circuit monitors branch road is flowed through in monitoring, and by the jump of monitoring
The current value and trip(ping) circuit break alarm current value I of lock loop monitoring branch roadtCompare, if trip(ping) circuit monitors the electric current of branch road
Value is less than trip(ping) circuit break alarm current value It, then judge that circuit breaking failure occurs in trip(ping) circuit, send alarm signal.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field with reference to above-described embodiment still can to the present invention embodiment modify or
Equivalent substitution, these any modifications or equivalent substitution without departing from spirit and scope of the invention are applying for this pending hair
Within bright claims.
Claims (9)
1. a kind of relay protection DC control circuit in-service monitoring and method for early warning, it is characterised in that：The DC control circuit
Including closing circuit and trip(ping) circuit；It the described method comprises the following steps：
Closing circuit monitoring branch road and trip(ping) circuit monitoring branch road are built respectively；
Closing circuit monitors element selection and parameter tuning in branch road and trip(ping) circuit monitoring branch road；
The current value that conjunction/trip(ping) circuit monitors branch road is flowed through in detection, and with conjunction/trip(ping) circuit break alarm current value ratio compared with sentencing
Disconnected conjunction/trip(ping) circuit is with the presence or absence of broken string；
The closing circuit include combined floodgate guard relay normally opened contact, the first automatic closing contact, first manual closing contact,
Combined floodgate guard relay, anti-trip relay contact, the first breaker normally closed auxiliary contact, closing coil and trip position relay
Device；
It is and described after the combined floodgate guard relay normally opened contact, the first automatic closing contact, first manual closing contact are in parallel
Combined floodgate guard relay, anti-trip relay contact, the first breaker normally closed auxiliary contact and closing coil are sequentially connected in series, described to jump
Gate position relay one end connects direct current operative power source, and the other end connects closing coil through the first breaker normally closed auxiliary contact；
The selection of element and the tuning process of parameter are as follows in closing circuit monitoring branch road：
(1) when breaker is in closing position, the first breaker normally closed auxiliary contact is disconnected and the normally opened auxiliary of the first breaker is touched
Point closure, now the first additional monitoring resistor is through the first Hall current sensor, the normally opened auxiliary contact of the first breaker and combined floodgate
Coil constitutes path L1, ignores the internal resistance of the first Hall current sensor, uses UnRepresent DC control circuit rated voltage, RcTable
Show closing coil resistance, it is known that the resistance R of the first additional monitoring resistor1Meet：
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Then R can be obtained1≥21Rc, according to the resistance R of the first additional monitoring resistor1Scope, select the first additional monitoring resistor,
And require the first additional monitoring resistor rated power be more than actually bear more than twice of power, to ensure its long-term work
Reliability；
(2) understand that closing circuit monitors the long-term work electric current I of branch road according to the first additional monitoring resistor of selectioncFor：
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According to IcSize select the first Hall current sensor；
(3) the contact resistance R of closing circuithRepresent, ignore the internal resistance of combined floodgate guard relay, in order to ensure that breaker is reliable
Close a floodgate, RhNeed to meet：
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Then R can be obtainedh≤0.25Rc；
Closing circuit break alarm current value IhRepresent, then have：
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2. relay protection DC control circuit in-service monitoring according to claim 1 and method for early warning, it is characterised in that：The
Closing line in one additional monitoring resistor, the first Hall current sensor, the normally opened auxiliary contact of the first breaker and closing circuit
Circle is followed in series to form the closing circuit monitoring branch road.
3. relay protection DC control circuit in-service monitoring according to claim 2 and method for early warning, it is characterised in that：Institute
Stating trip(ping) circuit includes tripping operation guard relay normally opened contact, the second automatic trip contact, the second manual trip contact, tripping operation guarantor
Hold relay, the normally opened auxiliary contact of the second breaker, breaking coil and closing operation position relay.
4. relay protection DC control circuit in-service monitoring according to claim 3 and method for early warning, it is characterised in that：Institute
State after tripping operation guard relay normally opened contact, the second automatic trip contact, the second manual trip contact parallel connection, protected with the tripping operation
Hold relay, the normally opened auxiliary contact of the second breaker, breaking coil to be sequentially connected in series, closing operation position relay one end connection is straight
Operation power is flowed, the other end connects breaking coil through the normally opened auxiliary contact of the second breaker.
5. relay protection DC control circuit in-service monitoring according to claim 3 and method for early warning, it is characterised in that：The
Tripping operation line in two additional monitoring resistors, the second Hall current sensor, the second breaker normally closed auxiliary contact and trip(ping) circuit
Circle is followed in series to form the trip(ping) circuit monitoring branch road.
6. relay protection DC control circuit in-service monitoring according to claim 5 and method for early warning, it is characterised in that：Institute
State the first Hall current sensor and the second Hall current sensor and use magnetic balance type Hall current sensor.
7. relay protection DC control circuit in-service monitoring according to claim 1 and method for early warning, it is characterised in that：Jump
The selection of element and the tuning process of parameter are as follows in lock loop monitoring branch road：
(1) when breaker is in trip position, the normally opened auxiliary contact of the second breaker are disconnected and the normally closed auxiliary of the second breaker is touched
Point closure, now the second additional monitoring resistor is through the second Hall current sensor, the second breaker normally closed auxiliary contact and tripping operation
Coil constitutes path L2, ignores the internal resistance of the second Hall current sensor, uses UnRepresent DC control circuit rated voltage, RdTable
Show breaking coil resistance, it is known that the resistance R of the second additional monitoring resistor2Meet：
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Then R can be obtained2≥21Rd, according to the resistance R of the second additional monitoring resistor2Scope, select the second additional monitoring resistor,
And require the second additional monitoring resistor rated power be more than actually bear more than twice of power, to ensure its long-term work
Reliability；
(2) understand that trip(ping) circuit monitors the long-term work electric current I of branch road according to the second additional monitoring resistor of selectiondFor：
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According to IdSize select the second Hall current sensor；
(3) the contact resistance R of trip(ping) circuittRepresent, ignore the internal resistance of tripping operation guard relay, in order to ensure that breaker is reliable
Tripping operation, RtNeed to meet：
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Trip(ping) circuit break alarm current value ItRepresent, then have：
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8. relay protection DC control circuit in-service monitoring according to claim 1 and method for early warning, it is characterised in that：When
When breaker is in "on" position, the current value that closing circuit monitors branch road is flowed through in monitoring, and the closing circuit of monitoring is monitored
The current value of branch road and closing circuit break alarm current value IhCompare, closed a floodgate if the current value of closing circuit monitoring branch road is less than
Circuit breaking alarm current value Ih, then judge that loose contact or circuit breaking failure occurs in closing circuit, send alarm signal.
9. relay protection DC control circuit in-service monitoring according to claim 7 and method for early warning, it is characterised in that：When
When breaker is in tripped condition, the current value that trip(ping) circuit monitors branch road is flowed through in monitoring, and the trip(ping) circuit of monitoring is monitored
The current value of branch road and trip(ping) circuit break alarm current value ItCompare, if the current value of trip(ping) circuit monitoring branch road is less than tripping operation
Circuit breaking alarm current value It, then judge that circuit breaking failure occurs in trip(ping) circuit, send alarm signal.
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106814313B (en) * | 2017-01-13 | 2019-05-17 | 天津大学 | The intellectual faculties in breaker operator circuit |
| CN106950449A (en) * | 2017-04-07 | 2017-07-14 | 国网山东省电力公司潍坊供电公司 | Intelligent substation checks and accepts breaker controller in analogue system |
| CN109509658B (en) * | 2018-12-29 | 2019-09-24 | 国网北京市电力公司 | A kind of relay protection DC control circuit and its full working scope monitoring and fault early warning method |
| CN109991533A (en) * | 2019-03-11 | 2019-07-09 | 国网新疆电力有限公司昌吉供电公司 | Counter type control loop exports monitoring device |
| CN109884521B (en) * | 2019-03-28 | 2024-03-12 | 山东钢铁股份有限公司 | Circuit breaker divide-shut brake control circuit broken wire monitoring alarm circuit |
| CN110146773A (en) * | 2019-06-20 | 2019-08-20 | 广东电网有限责任公司 | A kind of monitoring of control loop and fault coverage judgement system |
| CN110514994A (en) * | 2019-09-04 | 2019-11-29 | 甘书宇 | A kind of high-voltage AC breaker is restriked the method for on-line monitoring |
| CN111308334B (en) * | 2019-11-07 | 2021-01-26 | 广东电网有限责任公司 | Current type relay protection tripping circuit contact resistance detection device |
| CN111308332B (en) * | 2019-11-07 | 2021-01-26 | 广东电网有限责任公司 | Voltage type relay protection tripping circuit contact resistance detection device |
| CN112485655B (en) * | 2020-10-29 | 2022-05-31 | 国网湖北省电力有限公司电力科学研究院 | Accurate monitoring device and method for tripping and closing loop of substation breaker |
| CN115291093B (en) * | 2022-05-27 | 2023-12-22 | 国网江苏省电力有限公司南通供电分公司 | Circuit breaker working state detection method and system based on voltage monitoring |
| CN116840740B (en) * | 2023-08-25 | 2023-11-03 | 珠海菲森电力科技有限公司 | Control loop detection circuit and method and electronic equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203368011U (en) * | 2013-05-07 | 2013-12-25 | 南京南自西电电气有限责任公司 | Circuit breaker trip coil automation protection device |
| CN103515921A (en) * | 2013-09-25 | 2014-01-15 | 国家电网公司 | Online protection circuit of high-voltage breaker opening/closing coil and protection method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1429180A (en) * | 1972-08-18 | 1976-03-24 | Gent Co Ltd | Alarm circuits |
| JPH0353483A (en) * | 1989-07-20 | 1991-03-07 | Fuoresuto:Kk | Heater failure alarm |
| CN101710685B (en) * | 2009-11-20 | 2012-05-30 | 深圳市科陆电子科技股份有限公司 | Intelligent recloser |
| CN101728819B (en) * | 2009-11-20 | 2012-05-30 | 深圳市科陆电子科技股份有限公司 | Intelligent switch and control method thereof |
| CN102005720B (en) * | 2010-10-21 | 2013-09-11 | 重庆大学 | Neutral line breakage detection protection method and device |
-
2015
- 2015-04-29 CN CN201510214048.7A patent/CN104808102B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203368011U (en) * | 2013-05-07 | 2013-12-25 | 南京南自西电电气有限责任公司 | Circuit breaker trip coil automation protection device |
| CN103515921A (en) * | 2013-09-25 | 2014-01-15 | 国家电网公司 | Online protection circuit of high-voltage breaker opening/closing coil and protection method thereof |
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