CN102938556B - With the capacitor protection measurement and control integration device of unbalanced current protection function - Google Patents
With the capacitor protection measurement and control integration device of unbalanced current protection function Download PDFInfo
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- CN102938556B CN102938556B CN201210410663.1A CN201210410663A CN102938556B CN 102938556 B CN102938556 B CN 102938556B CN 201210410663 A CN201210410663 A CN 201210410663A CN 102938556 B CN102938556 B CN 102938556B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 33
- 238000005259 measurement Methods 0.000 title claims abstract description 26
- 230000010354 integration Effects 0.000 title claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The present invention relates to a kind of capacitor protection measurement and control integration device with unbalanced current protection function, this capacitor protection measurement and control integration device is used for carrying out protection and measurement and control to the shunt capacitor of non-direct ground system or small resistance grounding system, described capacitor protection measurement and control integration device is also provided with unbalanced current protection module, this module comprises trip protection unit and alarm unit, described trip protection unit is used for exceeding trip current threshold in unsymmetrical current value, and during certain time, trip, parting system circuit, described alarm unit is used for before the effect of trip protection unit, and unsymmetrical current value to exceed alarm current threshold value and certain time time, give the alarm.Compared with prior art, the present invention has the advantages such as fail safe is good, reliability is high, easy communication.
Description
Technical field
The present invention relates to a kind of electric system protection device, especially relate to a kind of capacitor protection measurement and control integration device with unbalanced current protection function.
Background technology
Capacitor protection measurement and control integration device is generally used for the relaying protection to capacitor; protection and the observing and controlling of institute's installing shunt capacitor in the non-direct ground system of below 110kV electric pressure or small resistance grounding system is gone for according to model difference; be applicable to single Y; two Y; △ shape wiring capacitance device group; can install by group screen, also can install on the spot at switch cubicle.But current most capacitor protection measurement and control integration device does not have unbalanced current protection function, causes the security of operation of Capacitor banks in electric power system effectively to be ensured.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of capacitor protection measurement and control integration device with unbalanced current protection function is provided; can before unsymmetrical current also reach the threshold value of shunt capacitor tripping operation; give the alarm; improve security performance; after unsymmetrical current reaches the threshold value of tripping operation, carry out trip protection system.
Object of the present invention can be achieved through the following technical solutions:
A kind of capacitor protection measurement and control integration device with unbalanced current protection function, this capacitor protection measurement and control integration device is used for carrying out protection and measurement and control to the shunt capacitor of non-direct ground system or small resistance grounding system, described capacitor protection measurement and control integration device is also provided with unbalanced current protection module, this module comprises trip protection unit and alarm unit, described trip protection unit is used for exceeding trip current threshold in unsymmetrical current value, and during certain time, trip, parting system circuit, described alarm unit is used for before the effect of trip protection unit, and unsymmetrical current value to exceed alarm current threshold value and certain time time, give the alarm.
The trip current threshold of described trip protection unit is 0.02 ~ 12A, and the alarm current threshold value of described alarm unit is 0.02 ~ 12A.
In described trip protection unit, unsymmetrical current value exceedes trip current threshold duration t
1scope be 0s < t
1≤ 100s, in described alarm unit, unsymmetrical current value exceedes alarm current threshold duration t
2scope be 0s < t
2≤ 100s.
Described capacitor protection measurement and control integration device is provided with ethernet communication interface, CAT5E UTP cable interface and optical communication interface.
Compared with prior art; the present invention is monitored the unsymmetrical current in electric power system by the unbalanced current protection module of trip protection unit and alarm unit composition; can before unsymmetrical current also reach the threshold value of shunt capacitor tripping operation; give the alarm, improve security performance, after unsymmetrical current reaches the threshold value of tripping operation; carry out trip protection system; in addition adopt various communication interfaces, each communication port independence, reliability are high, and information transmission is convenient.
Accompanying drawing explanation
Fig. 1 is the action logic figure of trip protection unit and alarm unit in the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of capacitor protection measurement and control integration device with unbalanced current protection function; this capacitor protection measurement and control integration device is used for carrying out protection and measurement and control to the shunt capacitor of non-direct ground system or small resistance grounding system; described capacitor protection measurement and control integration device is also provided with unbalanced current protection module, and this module comprises trip protection unit and alarm unit.
Trip protection unit is used for exceeding trip current threshold in unsymmetrical current value, and during certain time, trips, parting system circuit.Wherein, trip current threshold can between 0.02 ~ 12A free setting, unsymmetrical current value exceedes trip current threshold duration t
1scope be 0s < t
1≤ 100s, within the scope of this, can set a time definite value for controlling tripping operation.
Alarm unit be used for before the effect of trip protection unit, and unsymmetrical current value to exceed alarm current threshold value and certain time time, give the alarm.Wherein, the alarm current threshold value of alarm unit is can free setting between 0.02 ~ 12A, but is generally less than trip current threshold.In alarm unit, unsymmetrical current value exceedes alarm current threshold duration t
2scope be 0s < t
2≤ 100s, is used as the time definite value given the alarm.
The action logic figure of trip protection unit and alarm unit as shown in Figure 1; wherein BTJ is trip protection signal outlet; BJJ is alarm signal outlet; when unsymmetrical current value a exceedes trip current threshold b or alarm current threshold value c; K switch 1 and K2 close, when this unsymmetrical current continues regular hour t
1or t
2after, BTJ and BJJ sends control signal, carries out reporting to the police or trip operation.By the unbalanced current protection module of trip protection unit and alarm unit composition, the unsymmetrical current in electric power system is monitored; can before unsymmetrical current also reach the threshold value of shunt capacitor tripping operation; give the alarm; improve security performance; after unsymmetrical current reaches the threshold value of tripping operation, carry out trip protection system.
In addition, this capacitor protection measurement and control integration device is provided with ethernet communication interface, CAT5E UTP cable interface and optical communication interface, and make each communication port independence of the present invention, reliability high, information transmission is convenient.
Claims (2)
1. the capacitor protection measurement and control integration device with unbalanced current protection function, it is characterized in that, this capacitor protection measurement and control integration device is used for carrying out protection and measurement and control to the shunt capacitor of non-direct ground system or small resistance grounding system, before unsymmetrical current does not also reach the threshold value of shunt capacitor tripping operation, give the alarm, after unsymmetrical current reaches the threshold value of tripping operation, carry out trip protection; Described capacitor protection measurement and control integration device is also provided with unbalanced current protection module, this module comprises trip protection unit and alarm unit, described trip protection unit is used for exceeding trip current threshold in unsymmetrical current value, and during certain time, trip, parting system circuit, described alarm unit is used for before the effect of trip protection unit, and unsymmetrical current value to exceed alarm current threshold value and certain time time, give the alarm;
In described trip protection unit, unsymmetrical current value exceedes trip current threshold duration t
1scope be 0s < t
1≤ 100s, in described alarm unit, unsymmetrical current value exceedes alarm current threshold duration t
2scope be 0s < t
2≤ 100s; The trip current threshold of described trip protection unit is 0.02 ~ 12A, and the alarm current threshold value of described alarm unit is 0.02 ~ 12A.
2. a kind of capacitor protection measurement and control integration device with unbalanced current protection function according to claim 1; it is characterized in that, described capacitor protection measurement and control integration device is provided with ethernet communication interface, CAT5E UTP cable interface and optical communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410663.1A CN102938556B (en) | 2012-10-24 | 2012-10-24 | With the capacitor protection measurement and control integration device of unbalanced current protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410663.1A CN102938556B (en) | 2012-10-24 | 2012-10-24 | With the capacitor protection measurement and control integration device of unbalanced current protection function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102938556A CN102938556A (en) | 2013-02-20 |
| CN102938556B true CN102938556B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210410663.1A Active CN102938556B (en) | 2012-10-24 | 2012-10-24 | With the capacitor protection measurement and control integration device of unbalanced current protection function |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716619A (en) * | 2013-12-13 | 2015-06-17 | 国家电网公司 | Trip protection device |
| CN105006811B (en) * | 2015-08-21 | 2017-10-27 | 南京南瑞继保电气有限公司 | The electric current transverse differential protection method of double branching type alternating current filters |
| CN107732863A (en) * | 2017-10-27 | 2018-02-23 | 中山市华源电气设备有限公司 | Three-phase unbalanced current measurement and control device for capacitor tower |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609977A (en) * | 2008-06-19 | 2009-12-23 | 北京赤那思电气技术有限公司 | Capacitor bank protection and state monitoring apparatus and method thereof |
| CN102231326A (en) * | 2011-04-08 | 2011-11-02 | 中电普瑞科技有限公司 | 3/2-type differential current bridge power capacitor apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005059936A2 (en) * | 2003-12-11 | 2005-06-30 | Joslyn Hi-Voltage Corp. | Electrical, transmission/substation/distribution shunt capacitor switching and control system with integrated, automatically resettable, overcurrent protection |
-
2012
- 2012-10-24 CN CN201210410663.1A patent/CN102938556B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609977A (en) * | 2008-06-19 | 2009-12-23 | 北京赤那思电气技术有限公司 | Capacitor bank protection and state monitoring apparatus and method thereof |
| CN102231326A (en) * | 2011-04-08 | 2011-11-02 | 中电普瑞科技有限公司 | 3/2-type differential current bridge power capacitor apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 并联电容器不平衡电流保护的改进方法研究;盛小伟等;《继电器》;20061101;第34卷(第21期);第14-17页 * |
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| CN102938556A (en) | 2013-02-20 |
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