CN102868147A - Voltage-sharing detection protector for serially connected capacitors - Google Patents
Voltage-sharing detection protector for serially connected capacitors Download PDFInfo
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- CN102868147A CN102868147A CN2012103581093A CN201210358109A CN102868147A CN 102868147 A CN102868147 A CN 102868147A CN 2012103581093 A CN2012103581093 A CN 2012103581093A CN 201210358109 A CN201210358109 A CN 201210358109A CN 102868147 A CN102868147 A CN 102868147A
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- capacitor
- electric capacity
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- optocoupler
- capacitance detection
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Abstract
The invention relates to a voltage-sharing detection protector for serially connected capacitors. According to the invention, each capacitance detection unit comprises two groups of circuits, and each circuit comprises a capacitor, a resistor and optocouplers. In each circuit, one end of the capacitor is connected with the middle point of the serially connected capacitors, the other end of the capacitor is connected with one end of the resistor, and the other end of the resistor is respectively connected with an input end of the first optocoupler and an input end of the second optocoupler; the optocouplers of the two groups of circuits in the capacitance detection unit output in parallel in the same direction to a capacitor protecting board. A capacitor protecting unit comprises a 24V relay and a normally-closed button; an input end of the 24V relay is used as an input end of the capacitor protecting unit, and an output end of the 24V relay is externally connected with the protector; and the input end of the 24V relay is further connected with the normally-closed button. The voltage-sharing detection protector is simple in structure and convenient to install. A light emitting diode in a capacitor detecting board is electrically connected to lighten, so that a damaged capacitor can be conveniently identified and maintained. Machine halt can be timely performed for protection, so that the capacitor can be prevented from further being damaged, and cost and harm brought by damage of the capacitor can be reduced.
Description
Technical field
The invention belongs to the detection resist technology field of capacitor, be specifically related to a kind of capacitor's seriesu and all press the detection protective device.
Background technology
The capacitor working method, the form of employing multiple unit capacitor parallel connection, every group has two capacitor's seriesus.During capacitor work, when certain capacitor is damaged, if untimely protection is shut down or made the capacitor group of damage in time break away from main circuit power supply; then not damaging electric capacity will damage because of overload; and cause the power supply buses short circuit, and enlarge the extent of damage of equipment, strengthened cost and harmfulness.
Summary of the invention
The objective of the invention is to prevent the further damage of capacitor, in time protection is shut down, and Cost reduction and capacitor damage the harm that brings.
For reaching above-mentioned purpose, the technical solution used in the present invention is:
Capacitor's seriesu is all pressed the detection protective device, is one group for two capacitor's seriesus, and the form of multiple unit capacitor parallel connection comprises that a plurality of capacitance detection units and an electric capacity protected location form.
Per two group capacitors are a unit, and two series capacitor mid points of every group connect capacitance detection unit; Capacitance detection unit has two groups of circuit, and every group of circuit comprises electric capacity, resistance and optocoupler.
The mid point of one termination series capacitor of electric capacity, one end of other end connecting resistance, the other end of resistance is connected with an input of the first optocoupler, another input of the second optocoupler respectively, also is serially connected with therein light-emitting diode between one tunnel capacitor and the electric capacity; The electric capacity protected location is given in the output in parallel in the same way of two groups of circuit optocouplers of capacitance detection unit.
Electric capacity protection unit comprises 24V relay and normally closed button; The input of 24V relay is as the input of electric capacity protection unit, the external protective device of its output, and described protective device is used for cutting out equipment to be protected; Also be connected to normally closed button on the input of 24V relay.
The present invention compared with prior art has the following advantages: as long as every group capacitor has a capacitor to damage; the capacitance detection unit testing circuit will produce Voltage unbalance; when circuital current reaches the On current of optocoupler; Light-Emitting Diode is lighted; optocoupler conducting output; give the electric capacity baffle, baffle work isolation output protection signal, equipment protection is shut down.Capacitor's seriesu voltage equalizing protection technical pattern is simple, and is easy for installation.Light-emitting diode conducting in the capacitance detection plate is shinny, is convenient to identify which group capacitor and damages, and is easy to maintenance.In time protection is shut down, and prevents the further damage of capacitor, and Cost reduction and capacitor damage the harm that brings.
Description of drawings
Fig. 1 is circuit diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, capacitor's seriesu disclosed by the invention is all pressed the detection protective device, and 1 series connection is one group for two capacitors, the form of multiple unit capacitor parallel connection.Per two group capacitors are a unit 12, and two series capacitor 1 mid points of every group connect capacitance detection plate 3, other two termination power supply buses 2.Capacitance detection plate 3 has two groups of circuit, be composed in series by current-limiting impedance (among the figure for electric capacity 4 and resistance 5) and optocoupler 6 respectively, wherein also be connected in series on the way light-emitting diode 7.3 liang of groups of capacitance detection plate circuit optocoupler 6 is given electric capacity baffle 8 for output in parallel in the same way.Electric capacity baffle 8 is comprised of diode 9,24V relay 10 and button 11.Optocoupler 6 conductings, the 24V relay 10 of electric capacity baffle 8 gets electric work and forms self-locking, isolates simultaneously the output protection signal, and equipment protection is shut down.After handling the damage capacitor well, press baffle button 11, de-preservation, equipment can the normal boot-strap operation.
During capacitor work; when there being a capacitor to damage; the capacitance detection plate testing circuit produces Voltage unbalance, and when circuital current reached the On current of optocoupler, light-emitting diode was lighted; optocoupler conducting output; give the electric capacity baffle, the work of electric capacity baffle, relay gets electric and forms self-locking; isolate simultaneously the output protection signal, equipment protection is shut down.Light-emitting diode conducting in the capacitance detection plate is shinny, is convenient to identify which group capacitor and damages, and is easy to maintenance.After handling the damage capacitor well, press the baffle button, de-preservation, equipment can the normal boot-strap operation.
Claims (1)
1. capacitor's seriesu is all pressed the detection protective device, is one group for two capacitor's seriesus, and the form of multiple unit capacitor parallel connection comprises that a plurality of capacitance detection units and an electric capacity protected location form, and is characterized in that:
Per two group capacitors are a unit (12), and two series capacitors (1) mid point of every group connects capacitance detection unit (3); Capacitance detection unit (3) has two groups of circuit, and every group of circuit comprises electric capacity (4), resistance (5) and optocoupler (6);
The mid point of one termination series capacitor (1) of electric capacity (4), one end of other end connecting resistance (5), the other end of resistance (5) is connected with an input of the first optocoupler (6), another input of the second optocoupler respectively, also is serially connected with light-emitting diode (7) between one tunnel capacitor (1) and the electric capacity (4) therein; Electric capacity protected location (8) is given in (3) two groups of circuit optocouplers of capacitance detection unit (6) output in parallel in the same way;
Electric capacity protection unit (8) comprises 24V relay (10) and normally closed button (11); The input of 24V relay (10) is as the input of the electric capacity unit of protection (8), the external protective device of its output, and described protective device is used for cutting out equipment to be protected; Also be connected to normally closed button (11) on the input of 24V relay (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210358109.3A CN102868147B (en) | 2012-09-24 | 2012-09-24 | Voltage-sharing detection protector for serially connected capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210358109.3A CN102868147B (en) | 2012-09-24 | 2012-09-24 | Voltage-sharing detection protector for serially connected capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102868147A true CN102868147A (en) | 2013-01-09 |
| CN102868147B CN102868147B (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210358109.3A Active CN102868147B (en) | 2012-09-24 | 2012-09-24 | Voltage-sharing detection protector for serially connected capacitors |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159968A (en) * | 2016-07-07 | 2016-11-23 | 安徽众升电力科技有限公司 | TSC type reactive power compensator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2928995A (en) * | 1955-06-28 | 1960-03-15 | Asea Ab | Protective means for series capacitors on power lines |
| CN101170254A (en) * | 2007-09-21 | 2008-04-30 | 四川电力试验研究院 | Unbalanced protection method and device for high-voltage serial connection compensation capacitor group |
| CN201796095U (en) * | 2010-09-09 | 2011-04-13 | 苏州工业园区海沃科技有限公司 | Capacitor bank fault tester |
| CN202797904U (en) * | 2012-09-24 | 2013-03-13 | 杭州四达电炉成套设备有限公司 | Capacitor series voltage-sharing detection protecting device |
-
2012
- 2012-09-24 CN CN201210358109.3A patent/CN102868147B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2928995A (en) * | 1955-06-28 | 1960-03-15 | Asea Ab | Protective means for series capacitors on power lines |
| CN101170254A (en) * | 2007-09-21 | 2008-04-30 | 四川电力试验研究院 | Unbalanced protection method and device for high-voltage serial connection compensation capacitor group |
| CN201796095U (en) * | 2010-09-09 | 2011-04-13 | 苏州工业园区海沃科技有限公司 | Capacitor bank fault tester |
| CN202797904U (en) * | 2012-09-24 | 2013-03-13 | 杭州四达电炉成套设备有限公司 | Capacitor series voltage-sharing detection protecting device |
Non-Patent Citations (2)
| Title |
|---|
| 王云等: "浅析串联补偿电容装置不平衡电流的测试", 《高压电器》 * |
| 田秋松等: "大型串联电容器组在特高压固定串补中的应用", 《电力电容器与无功补偿》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159968A (en) * | 2016-07-07 | 2016-11-23 | 安徽众升电力科技有限公司 | TSC type reactive power compensator |
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| CN102868147B (en) | 2014-09-03 |
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