CN104808102A - Online monitoring and warning method for protective relaying direct-current operating circuit - Google Patents

Online monitoring and warning method for protective relaying direct-current operating circuit Download PDF

Info

Publication number
CN104808102A
CN104808102A CN201510214048.7A CN201510214048A CN104808102A CN 104808102 A CN104808102 A CN 104808102A CN 201510214048 A CN201510214048 A CN 201510214048A CN 104808102 A CN104808102 A CN 104808102A
Authority
CN
China
Prior art keywords
circuit
closing
trip
monitoring
ping
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.)
Granted
Application number
CN201510214048.7A
Other languages
Chinese (zh)
Other versions
CN104808102B (en
Inventor
李仲青
周泽昕
李永丽
张卫正
李伟
杜丁香
王兴国
郭小茜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin University
State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
State Grid Hubei Electric Power Co Ltd
Original Assignee
Tianjin University
State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
State Grid Hubei Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tianjin University, State Grid Corp of China SGCC, China Electric Power Research Institute Co Ltd CEPRI, State Grid Hubei Electric Power Co Ltd filed Critical Tianjin University
Priority to CN201510214048.7A priority Critical patent/CN104808102B/en
Publication of CN104808102A publication Critical patent/CN104808102A/en
Application granted granted Critical
Publication of CN104808102B publication Critical patent/CN104808102B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Keying Circuit Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention provides an online monitoring and warning method for a protective relaying direct-current operating circuit. The direct-current operating circuit comprises a closing circuit and a tripping circuit. The online monitoring and warning method includes steps of establishing a closing circuit monitoring branch and a tripping circuit monitoring branch respectively; selecting components and setting parameters in the closing circuit monitoring branch and the tripping circuit monitoring branch; detecting current flowing through the closing/tripping circuit monitoring branch to be compared with disconnection alarm current of the closing/tripping circuit, and judging whether the closing/tripping circuit is disconnected or not. The current flowing through the closing/tripping circuit monitoring branch can be monitored online by setting up the closing/tripping circuit monitoring branch, and complete monitoring of the tripping and closing circuits is realized by judging whether circuits are disconnected or not according to the current; by the online monitoring and warning method, all-condition complete monitoring can be realized without influencing normal operation of the system.

Description

A kind of relay protection DC control circuit in-service monitoring and method for early warning
Technical field
The present invention relates to a kind of method for early warning, be specifically related to a kind of relay protection DC control circuit in-service monitoring and method for early warning.
Background technology
Relay protection hardware deficiency is the one of the main reasons causing hidden failure to occur; the protection incorrect operation caused by DC control circuit defect accounts for quite high ratio, thus effectively monitors DC control circuit and early warning prevents hidden failure, reduces the important means protecting incorrect operation.DC control circuit loose contact, circuit breaking are the major reasons causing protection incorrect operation.Conventional traffic lights loop directly monitors or the method for position relay normally closed contact serial connection signal circuit indirect monitor, and all belong to non-fully operating condition monitoring, after isolating switch closes (jumpings) lock, conjunction (jumping) lock loop loses supervision.
In the face of China will build the demand of intelligent grid, will be one of Important Action realizing its target to the on-line monitoring in power system device and loop.Meanwhile, improving constantly of electronic devices and components reliability index, also for the application of on-line monitoring method and measure provides possibility.Document " the band breaker operator loop design of trip circuit monitoring and realization " indicate a kind of be connected in series high in the trip(ping) circuit of ohm relay to break supervision scheme, but in the program, closing circuit still belongs to non-fully operating condition monitoring.Meanwhile, the concept of intelligent operation box is also suggested, but adopts intelligent operation box in conventional substation, not only increases the complicacy of system nor economical.At present, also do not have ripe means to realize DC control circuit to monitor comprehensively and effectively.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of relay protection DC control circuit in-service monitoring and method for early warning, by building conjunction/trip(ping) circuit monitoring branch road, on-line monitoring flows through the current value of conjunction/trip(ping) circuit monitoring branch road, and judge whether loop exists disconnection problem according to monitoring current size, thus realize the integrity monitoring of tripping operation and closing circuit; The integrality full working scope that the method not only can realize DC control circuit monitors, and normally can not run system and impact.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides a kind of relay protection DC control circuit in-service monitoring and method for early warning, described DC control circuit comprises closing circuit and trip(ping) circuit; Said method comprising the steps of:
Build closing circuit monitoring branch road and trip(ping) circuit monitoring branch road respectively;
Closing circuit monitoring branch road and trip(ping) circuit are monitored element in branch road and are selected and parameter tuning;
Detect and flow through the current value that branch road is monitored in conjunctions/trip(ping) circuit, and with conjunction/trip(ping) circuit break alarm current value ratio comparatively, judge whether conjunction/trip(ping) circuit exists broken string.
Described closing circuit comprises combined floodgate guard relay normally opened contact, the first automatic closing contact, the first closing by hand contact, combined floodgate guard relay, anti-trip relay contact, the first isolating switch normally closed auxiliary contact, closing coil and tripping position relay.
After described combined floodgate guard relay normally opened contact, the first automatic closing contact, the first closing by hand contact shunt, connect successively with described combined floodgate guard relay, anti-trip relay contact, the first isolating switch normally closed auxiliary contact and closing coil, described tripping position relay one end connects direct current operative power source, and the other end connects closing coil through the first isolating switch normally closed auxiliary contact.
First additional monitoring resistor, the first Hall current sensor, the first isolating switch closing coil often opened in auxiliary contact and closing circuit are followed in series to form described closing circuit and monitor branch road.
Described trip(ping) circuit comprises tripping operation guard relay normally opened contact, the second automatic trip contact, the second manual trip contact, tripping operation guard relay, the second isolating switch often open auxiliary contact, breaking coil and closing operation position relay.
After described tripping operation guard relay normally opened contact, the second automatic trip contact, the second manual trip contact parallel connection, with described tripping operation guard relay, the second isolating switch often drives auxiliary contact, breaking coil is connected successively, described closing operation position relay one end connects direct current operative power source, and the other end is often driven auxiliary contact through the second isolating switch and connected breaking coil.
Breaking coil in second additional monitoring resistor, the second Hall current sensor, the second isolating switch normally closed auxiliary contact and trip(ping) circuit is followed in series to form described trip(ping) circuit and monitors branch road.
Described first Hall current sensor and the second Hall current sensor all adopt magnetic balance type Hall current sensor.
In closing circuit monitoring branch road, the tuning process of the selection of element and parameter is as follows:
(1) when isolating switch is in closing position, first isolating switch normally closed auxiliary contact disconnect and the first isolating switch often open auxiliary contact close, now the first additional monitoring resistor through the first Hall current sensor, the first isolating switch often drives auxiliary contact and closing coil forms path L1, ignore the internal resistance of the first Hall current sensor, use U nrepresent DC control circuit rated voltage, R crepresent closing coil resistance, the resistance R of the known first additional monitoring resistor 1meet:
110 % × U n R c + R 1 ≤ 5 % × U n R c
So can R be obtained 1>=21R c, according to the resistance R of the first additional monitoring resistor 1scope, select the first additional monitoring resistor, and require that the rated power of the first additional monitoring resistor is greater than and actually bear more than the twice of power, to ensure the reliability of its long-term work;
(2) according to the long-term work electric current I of the select first additional monitoring resistor known closing circuit monitoring branch road cfor:
I c = U n R 1 + R c
According to I csize select the first Hall current sensor;
(3) the contact resistance R of closing circuit hrepresenting, ignoring the internal resistance of combined floodgate guard relay, in order to ensure that isolating switch reliably closes a floodgate, R hneed meet:
U n R h + R c × R c ≥ 80 % × U n
So can R be obtained h≤ 0.25R c;
Closing circuit break alarm current value I hrepresent, so have:
I h = U n R 1 + R c + R h .
In trip(ping) circuit monitoring branch road, the tuning process of the selection of element and parameter is as follows:
(1) when isolating switch is in trip position, second isolating switch often opens auxiliary contact disconnection and the second isolating switch normally closed auxiliary contact closes, now the second additional monitoring resistor forms path L2 through the second Hall current sensor, the second isolating switch normally closed auxiliary contact and breaking coil, ignore the internal resistance of the second Hall current sensor, use U nrepresent DC control circuit rated voltage, R drepresent breaking coil resistance, the resistance R of the known second additional monitoring resistor 2meet:
110 % × U n R d + R 2 ≤ 5 % × U n R d
So can R be obtained 2>=21R d, according to the resistance R of the second additional monitoring resistor 2scope, select the second additional monitoring resistor, and require that the rated power of the second additional monitoring resistor is greater than and actually bear more than the twice of power, to ensure the reliability of its long-term work;
(2) according to the long-term work electric current I of the select second additional monitoring resistor known trip(ping) circuit monitoring branch road dfor:
I d = U n R 2 + R d
According to I dsize select the second Hall current sensor;
(3) the contact resistance R of trip(ping) circuit trepresenting, ignoring the internal resistance of tripping operation guard relay, in order to ensure isolating switch reliable trip, R tneed meet:
U n R t + R d × R d ≥ 80 % × U n
So can R be obtained t≤ 0.25R d;
Trip(ping) circuit break alarm current value I trepresent, so have:
I t = U n R 2 + R d + R t .
When isolating switch is in "on" position, the current value of closing circuit monitoring branch road is flow through in monitoring, and by the current value of the closing circuit of monitoring monitoring branch road and closing circuit break alarm current value I hrelatively, if the current value of closing circuit monitoring branch road is less than closing circuit break alarm current value I h, then judge that loose contact or circuit breaking fault appear in closing circuit, send alerting signal.
When isolating switch is in tripped condition, the current value of trip(ping) circuit monitoring branch road is flow through in monitoring, and by the current value of the trip(ping) circuit of monitoring monitoring branch road and trip(ping) circuit break alarm current value I trelatively, if the current value of trip(ping) circuit monitoring branch road is less than trip(ping) circuit break alarm current value I t, then judge that circuit breaking fault appears in trip(ping) circuit, send alerting signal.
Compared with prior art, beneficial effect of the present invention is:
The integrality full working scope that present invention achieves DC control circuit monitors, can overcome closing circuit in prior art and lose supervision and trip(ping) circuit loses the deficiency of supervision;
Supervision of the present invention is highly sensitive, effectively can find DC control circuit loose contact, circuit breaking problem;
The present invention adopts Hall current sensor, realize complete electric isolution between conjunction/trip(ping) circuit monitoring branch road and conjunction/trip(ping) circuit, normally can not run impact the main system of isolating switch, and precision is high, response fast, volume is little.
Accompanying drawing explanation
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
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The invention provides a kind of relay protection DC control circuit in-service monitoring and method for early warning, described DC control circuit comprises closing circuit and trip(ping) circuit; Said method comprising the steps of:
Build closing circuit monitoring branch road and trip(ping) circuit monitoring branch road respectively;
Closing circuit monitoring branch road and trip(ping) circuit are monitored element in branch road and are selected and parameter tuning;
Detect and flow through the current value that branch road is monitored in conjunctions/trip(ping) circuit, and with conjunction/trip(ping) circuit break alarm current value ratio comparatively, judge whether conjunction/trip(ping) circuit exists broken string.
As Fig. 1, described closing circuit comprises combined floodgate guard relay normally opened contact HBJ, the first automatic closing contact ZHJ, the first closing by hand contact SHJ, combined floodgate guard relay HBJ, anti-trip relay contact TBJV, the first isolating switch normally closed auxiliary contact QF1, closing coil HQ and tripping position relay TWJ.
After described combined floodgate guard relay normally opened contact HBJ, the first automatic closing contact ZHJ, the first closing by hand contact ZHJ parallel connection, connect successively with described combined floodgate guard relay HBJ, anti-trip relay contact TBJV, the first isolating switch normally closed auxiliary contact QF1 and closing coil HQ, described tripping position relay TWJ one end connects direct current operative power source+KW, and the other end connects closing coil HQ through the first isolating switch normally closed auxiliary contact QF1.
First additional monitoring resistor R1, the first Hall current sensor HL1, the first isolating switch closing coil HQ often opened in auxiliary contact QF2 and closing circuit are followed in series to form described closing circuit and monitor branch road.
As Fig. 2, described trip(ping) circuit comprises tripping operation guard relay normally opened contact TBJ, the second automatic trip contact TJ, the second manual trip contact STJ, tripping operation guard relay TBJ, the second isolating switch often open auxiliary contact QF3, breaking coil TQ and closing operation position relay HWJ.
After described tripping operation guard relay normally opened contact, TBJ second automatic trip contact TJ, the second manual trip contact STJ parallel connection, with described tripping operation guard relay TBJ, the second isolating switch often opens auxiliary contact QF3, breaking coil TQ connects successively, described closing operation position relay HWJ one end connects direct current operative power source+KW, and the other end is often opened auxiliary contact QF3 through the second isolating switch and connected breaking coil TQ.
The second breaking coil TQ added in monitoring resistor R2, the second Hall current sensor HL2, the second isolating switch normally closed auxiliary contact QF4 and trip(ping) circuit is followed in series to form described trip(ping) circuit and monitors branch road.
Described first Hall current sensor HL1 and the second Hall current sensor HL2 all adopts magnetic balance type Hall current sensor.
In closing circuit monitoring branch road, the tuning process of the selection of element and parameter is as follows:
(1) when isolating switch is in closing position, first isolating switch normally closed auxiliary contact disconnects QF1 and the first isolating switch and often opens auxiliary contact QF2 and close, now the first additional monitoring resistor R1 through the first Hall current sensor HL1, the first isolating switch often opens auxiliary contact QF2 and closing coil forms path L1, ignore the internal resistance of the first Hall current sensor HL1, use U nrepresent DC control circuit rated voltage, R crepresent closing coil resistance, the resistance R of the known first additional monitoring resistor 1meet:
110 % × U n R c + R 1 ≤ 5 % × U n R c
So can R be obtained 1>=21R c, according to the resistance R of the first additional monitoring resistor 1scope, select the first additional monitoring resistor R1, and require that the rated power of the first additional monitoring resistor R1 is greater than and actually bear more than the twice of power, to ensure the reliability of its long-term work;
(2) according to the long-term work electric current I of the select first additional monitoring resistor R1 known closing circuit monitoring branch road cfor:
I c = U n R 1 + R c
According to I csize select the first Hall current sensor HL1;
(3) the contact resistance R of closing circuit hrepresenting, ignoring the internal resistance of combined floodgate guard relay, in order to ensure that isolating switch reliably closes a floodgate, R hneed meet:
U n R h + R c × R c ≥ 80 % × U n
So can R be obtained h≤ 0.25R c;
Closing circuit break alarm current value I hrepresent, so have:
I h = U n R 1 + R c + R h .
In trip(ping) circuit monitoring branch road, the tuning process of the selection of element and parameter is as follows:
(1) when isolating switch is in trip position, second isolating switch often opens auxiliary contact QF3 disconnection and the second isolating switch normally closed auxiliary contact QF4 closes, now the second additional monitoring resistor R2 forms path L2 through the second Hall current sensor HL2, the second isolating switch normally closed auxiliary contact QF4 and breaking coil, ignore the internal resistance of the second Hall current sensor, use U nrepresent DC control circuit rated voltage, R drepresent breaking coil resistance, the resistance R of the known second additional monitoring resistor 2meet:
110 % × U n R d + R 2 ≤ 5 % × U n R d
So can R be obtained 2>=21R d, according to the resistance R of the second additional monitoring resistor 2scope, select the second additional monitoring resistor R2, and require that the rated power of the second additional monitoring resistor R2 is greater than and actually bear more than the twice of power, to ensure the reliability of its long-term work;
(2) according to the long-term work electric current I of the select second additional monitoring resistor R2 known trip(ping) circuit monitoring branch road dfor:
I d = U n R 2 + R d
According to I dsize select the second Hall current sensor HL2;
(3) the contact resistance R of trip(ping) circuit trepresenting, ignoring the internal resistance of tripping operation guard relay, in order to ensure isolating switch reliable trip, R tneed meet:
U n R t + R d × R d ≥ 80 % × U n
So can R be obtained t≤ 0.25R d;
Trip(ping) circuit break alarm current value I trepresent, so have:
I t = U n R 2 + R d + R t .
When isolating switch is in "on" position, the current value of closing circuit monitoring branch road is flow through in monitoring, and by the current value of the closing circuit of monitoring monitoring branch road and closing circuit break alarm current value I hrelatively, if the current value of closing circuit monitoring branch road is less than closing circuit break alarm current value I h, then judge that loose contact or circuit breaking fault appear in closing circuit, send alerting signal.
When isolating switch is in tripped condition, the current value of trip(ping) circuit monitoring branch road is flow through in monitoring, and by the current value of the trip(ping) circuit of monitoring monitoring branch road and trip(ping) circuit break alarm current value I trelatively, if the current value of trip(ping) circuit monitoring branch road is less than trip(ping) circuit break alarm current value I t, then judge that circuit breaking fault appears in trip(ping) circuit, send alerting signal.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; those of ordinary skill in the field still can modify to the specific embodiment of the present invention with reference to above-described embodiment or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.

Claims (12)

1. relay protection DC control circuit in-service monitoring and a method for early warning, is characterized in that: described DC control circuit comprises closing circuit and trip(ping) circuit; Said method comprising the steps of:
Build closing circuit monitoring branch road and trip(ping) circuit monitoring branch road respectively;
Closing circuit monitoring branch road and trip(ping) circuit are monitored element in branch road and are selected and parameter tuning;
Detect and flow through the current value that branch road is monitored in conjunctions/trip(ping) circuit, and with conjunction/trip(ping) circuit break alarm current value ratio comparatively, judge whether conjunction/trip(ping) circuit exists broken string.
2. relay protection DC control circuit in-service monitoring according to claim 1 and method for early warning, is characterized in that: described closing circuit comprises combined floodgate guard relay normally opened contact, the first automatic closing contact, the first closing by hand contact, combined floodgate guard relay, anti-trip relay contact, the first isolating switch normally closed auxiliary contact, closing coil and tripping position relay.
3. relay protection DC control circuit in-service monitoring according to claim 2 and method for early warning; it is characterized in that: after described combined floodgate guard relay normally opened contact, the first automatic closing contact, the first closing by hand contact shunt; connect successively with described combined floodgate guard relay, anti-trip relay contact, the first isolating switch normally closed auxiliary contact and closing coil; described tripping position relay one end connects direct current operative power source, and the other end connects closing coil through the first isolating switch normally closed auxiliary contact.
4. relay protection DC control circuit in-service monitoring according to claim 2 and method for early warning, is characterized in that: the first additional monitoring resistor, the first Hall current sensor, the first isolating switch closing coil often opened in auxiliary contact and closing circuit are followed in series to form described closing circuit and monitor branch road.
5. relay protection DC control circuit in-service monitoring according to claim 4 and method for early warning, is characterized in that: described trip(ping) circuit comprises tripping operation guard relay normally opened contact, the second automatic trip contact, the second manual trip contact, tripping operation guard relay, the second isolating switch often open auxiliary contact, breaking coil and closing operation position relay.
6. relay protection DC control circuit in-service monitoring according to claim 5 and method for early warning; it is characterized in that: after described tripping operation guard relay normally opened contact, the second automatic trip contact, the second manual trip contact parallel connection; with described tripping operation guard relay, the second isolating switch often drives auxiliary contact, breaking coil is connected successively; described closing operation position relay one end connects direct current operative power source, and the other end is often driven auxiliary contact through the second isolating switch and connected breaking coil.
7. relay protection DC control circuit in-service monitoring according to claim 5 and method for early warning, is characterized in that: the breaking coil in the second additional monitoring resistor, the second Hall current sensor, the second isolating switch normally closed auxiliary contact and trip(ping) circuit is followed in series to form described trip(ping) circuit and monitors branch road.
8. relay protection DC control circuit in-service monitoring according to claim 7 and method for early warning, is characterized in that: described first Hall current sensor and the second Hall current sensor all adopt magnetic balance type Hall current sensor.
9. relay protection DC control circuit in-service monitoring according to claim 1 and method for early warning, is characterized in that: in closing circuit monitoring branch road, the tuning process of the selection of element and parameter is as follows:
(1) when isolating switch is in closing position, first isolating switch normally closed auxiliary contact disconnect and the first isolating switch often open auxiliary contact close, now the first additional monitoring resistor through the first Hall current sensor, the first isolating switch often drives auxiliary contact and closing coil forms path L1, ignore the internal resistance of the first Hall current sensor, use U nrepresent DC control circuit rated voltage, R crepresent closing coil resistance, the resistance R of the known first additional monitoring resistor 1meet:
100 % × U n R c + R 1 ≤ 5 % × U n R c
So can R be obtained 1>=21R c, according to the resistance R of the first additional monitoring resistor 1scope, select the first additional monitoring resistor, and require that the rated power of the first additional monitoring resistor is greater than and actually bear more than the twice of power, to ensure the reliability of its long-term work;
(2) according to the long-term work electric current I of the select first additional monitoring resistor known closing circuit monitoring branch road cfor:
I c = U n R 1 + R c
According to I csize select the first Hall current sensor;
(3) the contact resistance R of closing circuit hrepresenting, ignoring the internal resistance of combined floodgate guard relay, in order to ensure that isolating switch reliably closes a floodgate, R hneed meet:
U n R h + R c × R c ≥ 80 % × U n
So can R be obtained h≤ 0.25R c;
Closing circuit break alarm current value I hrepresent, so have:
I h = U n R 1 + R c + R h .
10. relay protection DC control circuit in-service monitoring according to claim 1 and method for early warning, is characterized in that: in trip(ping) circuit monitoring branch road, the tuning process of the selection of element and parameter is as follows:
(1) when isolating switch is in trip position, second isolating switch often opens auxiliary contact disconnection and the second isolating switch normally closed auxiliary contact closes, now the second additional monitoring resistor forms path L2 through the second Hall current sensor, the second isolating switch normally closed auxiliary contact and breaking coil, ignore the internal resistance of the second Hall current sensor, use U nrepresent DC control circuit rated voltage, R drepresent breaking coil resistance, the resistance R of the known second additional monitoring resistor 2meet:
100 % × U n R d + R 2 ≤ 5 % × U n R d
So can R be obtained 2>=21R d, according to the resistance R of the second additional monitoring resistor 2scope, select the second additional monitoring resistor, and require that the rated power of the second additional monitoring resistor is greater than and actually bear more than the twice of power, to ensure the reliability of its long-term work;
(2) according to the long-term work electric current I of the select second additional monitoring resistor known trip(ping) circuit monitoring branch road dfor:
I d = U n R 2 + R d
According to I dsize select the second Hall current sensor;
(3) the contact resistance R of trip(ping) circuit trepresenting, ignoring the internal resistance of tripping operation guard relay, in order to ensure isolating switch reliable trip, R tneed meet:
U n R t + R d × R d ≥ 80 % × U n
So can R be obtained t≤ 0.25R d;
Trip(ping) circuit break alarm current value I trepresent, so have:
I t = U n R 2 + R d + R t .
11. relay protection DC control circuit in-service monitoring according to claim 9 and method for early warning; it is characterized in that: when isolating switch is in "on" position; the current value of closing circuit monitoring branch road is flow through in monitoring, and by the current value of the closing circuit of monitoring monitoring branch road and closing circuit break alarm current value I hrelatively, if the current value of closing circuit monitoring branch road is less than closing circuit break alarm current value I h, then judge that loose contact or circuit breaking fault appear in closing circuit, send alerting signal.
12. relay protection DC control circuit in-service monitoring according to claim 10 and method for early warning; it is characterized in that: when isolating switch is in tripped condition; the current value of trip(ping) circuit monitoring branch road is flow through in monitoring, and by the current value of the trip(ping) circuit of monitoring monitoring branch road and trip(ping) circuit break alarm current value I trelatively, if the current value of trip(ping) circuit monitoring branch road is less than trip(ping) circuit break alarm current value I t, then judge that circuit breaking fault appears in trip(ping) circuit, send alerting signal.
CN201510214048.7A 2015-04-29 2015-04-29 A kind of relay protection DC control circuit in-service monitoring and method for early warning Active CN104808102B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510214048.7A CN104808102B (en) 2015-04-29 2015-04-29 A kind of relay protection DC control circuit in-service monitoring and method for early warning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510214048.7A CN104808102B (en) 2015-04-29 2015-04-29 A kind of relay protection DC control circuit in-service monitoring and method for early warning

Publications (2)

Publication Number Publication Date
CN104808102A true CN104808102A (en) 2015-07-29
CN104808102B CN104808102B (en) 2017-11-03

Family

ID=53693098

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510214048.7A Active CN104808102B (en) 2015-04-29 2015-04-29 A kind of relay protection DC control circuit in-service monitoring and method for early warning

Country Status (1)

Country Link
CN (1) CN104808102B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106814313A (en) * 2017-01-13 2017-06-09 天津大学 The intellectual faculties in breaker operator loop
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
CN109509658A (en) * 2018-12-29 2019-03-22 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
CN109884521A (en) * 2019-03-28 2019-06-14 山东钢铁股份有限公司 A kind of circuit-breaker switching on-off control loop template monitoring, alarming circuit
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
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
CN111308332A (en) * 2019-11-07 2020-06-19 广东电网有限责任公司 Voltage type relay protection tripping circuit contact resistance detection device
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
CN112485655A (en) * 2020-10-29 2021-03-12 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 circuit breaker
CN115291093A (en) * 2022-05-27 2022-11-04 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
CN116840740A (en) * 2023-08-25 2023-10-03 珠海菲森电力科技有限公司 Control loop detection circuit and method and electronic equipment

Citations (7)

* Cited by examiner, † Cited by third party
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
CN101710685A (en) * 2009-11-20 2010-05-19 深圳市科陆电子科技股份有限公司 Intelligent recloser
CN101728819A (en) * 2009-11-20 2010-06-09 深圳市科陆电子科技股份有限公司 Intelligent switch and control method thereof
CN102005720A (en) * 2010-10-21 2011-04-06 重庆大学 Neutral line breakage detection protection method and device
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
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
CN101710685A (en) * 2009-11-20 2010-05-19 深圳市科陆电子科技股份有限公司 Intelligent recloser
CN101728819A (en) * 2009-11-20 2010-06-09 深圳市科陆电子科技股份有限公司 Intelligent switch and control method thereof
CN102005720A (en) * 2010-10-21 2011-04-06 重庆大学 Neutral line breakage detection protection method and device
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周华良 等: "带跳闸回路监视的断路器操作回路设计与实现", 《江苏电机工程》 *

Cited By (18)

* Cited by examiner, † Cited by third party
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
CN106814313A (en) * 2017-01-13 2017-06-09 天津大学 The intellectual faculties in breaker operator loop
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
CN109509658A (en) * 2018-12-29 2019-03-22 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
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
CN109884521A (en) * 2019-03-28 2019-06-14 山东钢铁股份有限公司 A kind of circuit-breaker switching on-off control loop template monitoring, alarming 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
CN111308332A (en) * 2019-11-07 2020-06-19 广东电网有限责任公司 Voltage type relay protection tripping circuit contact resistance detection device
CN112485655A (en) * 2020-10-29 2021-03-12 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 circuit breaker
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
CN115291093A (en) * 2022-05-27 2022-11-04 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
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
CN116840740A (en) * 2023-08-25 2023-10-03 珠海菲森电力科技有限公司 Control loop detection circuit and method and electronic equipment
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

Also Published As

Publication number Publication date
CN104808102B (en) 2017-11-03

Similar Documents

Publication Publication Date Title
CN104808102A (en) Online monitoring and warning method for protective relaying direct-current operating circuit
CN103515921B (en) A kind of online protective circuit of high-voltage circuit breaker/closing coil and guard method thereof
CN109509658B (en) A kind of relay protection DC control circuit and its full working scope monitoring and fault early warning method
CN201656420U (en) Three-phase auto reclosing electricity leakage protection switch
US8817438B2 (en) Recloser device and method of operation
CN103954879B (en) A kind of band shunt reactor double circuit lines character method of discrimination
CN102005720B (en) Neutral line breakage detection protection method and device
CN103606889B (en) A kind of secondary side overcurrent protection circuit of electric arc furnace transformer
US8861154B2 (en) Recloser device and method of operation
CN105680412A (en) Intelligent self-reset over-current protector and working method thereof
CN107561408A (en) A kind of method for improving low-current ground fault line selection accuracy rate
Blair et al. Solutions to common distribution protection challenges
CN205959867U (en) Outdoor high pressure spring operation vacuum circuit breaker's control circuit
CN103066575A (en) Control method of rapidly finding fault
CN210123467U (en) Control loop monitoring and fault range judging system
CN104810805A (en) Integrated protection and control method of single-phase load
CN204067890U (en) Change low-pressure line-outgoing control cubicle for two yuan
CN202384828U (en) Two-port power supply lightning protection device with automatic switching line
CN204068225U (en) Intelligent distribution network self-healing control system
CN104269832A (en) Self-adaptive single-phase recloser control device and method
CN209200656U (en) A kind of current quick-breaking prevents station with becoming overstepping device in conjunction with zero-sequenceprotection
CN201270413Y (en) Distance protection apparatus
CN201946966U (en) Partitioned power supply protection device of communication equipment
CN202059148U (en) Leakage protector suitable for data communication
CN201117594Y (en) Universal type circuit breaker possessing reclosing device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant