CN201478805U - Automatic switching device for discharge resistance of reactive power compensation capacitor - Google Patents
Automatic switching device for discharge resistance of reactive power compensation capacitor Download PDFInfo
- Publication number
- CN201478805U CN201478805U CN 200920188645 CN200920188645U CN201478805U CN 201478805 U CN201478805 U CN 201478805U CN 200920188645 CN200920188645 CN 200920188645 CN 200920188645 U CN200920188645 U CN 200920188645U CN 201478805 U CN201478805 U CN 201478805U
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- China
- Prior art keywords
- capacitor
- discharge resistance
- reactive power
- relay
- power compensation
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Abstract
The utility model relates to an automatic switching device for a discharge resistance of a reactive power compensation capacitor, which comprises a relay connected between the capacitor and the discharge resistance in series and a control circuit connected with two ends of the capacitor in parallel and electrically connected with the relay. When the switching switch of the capacitor is in the closed state, the control circuit is used for controlling the relay to cause the capacitor to he disconnected with the discharge resistance; and when the switching switch is in the opened state, the control circuit is used for controlling the relay to cause the capacitor to be connected with the discharge resistance, so that stored energy on the capacitor is released by the discharge resistance. The automatic switching device can effectively protect the capacitor on one hand and save energy sources on the other hand, thereby having larger practicability.
Description
Technical field
The utility model relates in a kind of electric power system, the automatic switching device that the reactive power compensation capacitor that is connected with electrical network is controlled.
Background technology
The power of electrical network output comprises two parts: the one, and active power, the 2nd, reactive power.Directly consumed power changes electric energy into mechanical energy, heat energy, chemical energy or acoustic energy, utilizes these energy works done, and this part power is called active power; Consumed power just is converted to electric energy the energy of another kind of form, this can as electric equipment can work done essential condition, and this can be to carry out periodicity conversion with electric energy in electrical network, this part power is called reactive power.Set up the electric energy that magnetic field takies as electromagnetic component, capacitor is set up the shared electric energy of electric field.If capacity cell is installed in the electromagnetic component circuit proportionally, both electric currents are cancelled out each other, the vector of electric current and the angle between the voltage vector are dwindled, thereby improve the ability of electric energy work done, the principle of reactive power compensation that Here it is.Reactive power compensation has bigger meaning, and at first it can increase the proportionality constant of active power in the electrical network; Once more its can reduce send out, the design capacity of power supply unit, reduce investment; Can reduce line loss in addition; And reduce design capacity, reduce investment, increase the conveying ratio of active power in the electrical network and reduce the economic benefit that line loss all directly determined and affected power supply enterprise.
Reactive power compensation device is to adopt capacitor in the prior art, the form of the discharge resistance that is in parallel with this capacitor, like this when the capacitor switching switch that links to each other with electrical network disconnects, promptly excised being connected of capacitor and electrical network, discharge resistance will be in the regular hour discharges the energy storage of capacitor, but, when fling-cut switch is in closure state, promptly when operation, because discharge resistance is added in the two ends of capacitor always, rising will cause capacitor bulge or blast thereby this will cause the capacitor temperature, and discharge resistance still has electric current to flow through, and therefore, also relatively wastes energy.
The utility model content
But the utility model purpose is the discharge resistance automatic switching device that a kind of effectively capacitor for voltage protection and energy savings are provided in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the utility model is: a kind of reactive power compensation capacitor discharge resistance automatic switching device, described reactive power compensation capacitor two ends are connected with electrical network by the capacitor switching switch, described discharge resistance is in parallel with the reactive power compensation capacitor and is connected, this automatic switching device comprises the relay that is connected between described reactive power compensation capacitor and the discharge resistance, the control circuit that is electrically connected with described relay that is connected in parallel on described reactive power compensation capacitor two ends, when described capacitor switching switch is in closure state, described control circuit control relay disconnects being connected between capacitor and the discharge resistance; When described fling-cut switch is in open mode, thereby described control circuit control relay is connected and being connected between capacitor and the discharge resistance is made discharge resistance that the energy storage on the capacitor is discharged.
Further, described relay is a normally closed switch.
Described control circuit comprises reduction voltage circuit, rectification circuit, voltage stabilizing circuit, filter circuit and the relay drive circuit that is electrically connected successively.
Because the utilization of technique scheme, the utility model compared with prior art has following advantage: by between capacitor and the discharge resistance relay being set and combining the open and-shut mode of the running status control relay contact of capacitor, promptly disconnect and being connected of electrical network when capacitor, relay is in closure state, form path between capacitor and the discharge resistance, thereby the energy storage on the capacitor is discharged by discharge resistance; When capacitor and electrical network are in connection status, control relay disconnects being connected of capacitor and discharge resistance, flows through this discharge resistance thereby no longer include electric current, has saved energy consumption, and has reached the purpose of capacitor for voltage protection.
Description of drawings
Accompanying drawing 1 is the utility model automatic switching device application principle figure;
Accompanying drawing 2 is the utility model control circuit theory diagram;
Wherein: 1, reduction voltage circuit; 2, rectification circuit; 3, voltage stabilizing circuit; 4, filter circuit; 5, relay drive circuit; 10, control circuit;
Embodiment
Below in conjunction with accompanying drawing, describe particular content of the present utility model in detail for example:
As shown in Figure 1, output at electrical network, the reactive power compensation capacitor C is electrically connected by capacitor switching switch G and electrical network, be parallel with discharge resistance R at the two ends of capacitor C, simultaneously, between capacitor C and discharge resistance R, be connected with relay K, the on off state of this relay K is controlled by the control circuit 10 that is connected in parallel on capacitor C two ends, this control circuit 10 is made up of reduction voltage circuit 1, rectification circuit 2, voltage stabilizing circuit 3, filter circuit 4 and relay drive circuit 5, above-mentioned each circuit is a circuit common, does not repeat them here.The high voltage input terminal of reduction voltage circuit 1 is connected with electrical network, low-pressure end is connected with the low-pressure end of electric capacity, when capacitor switching switch G one closure, control circuit 10 promptly gets electric, thereby thereby the electrical network high voltage drives the relay K action through inputing to relay drive circuit 5 after reduction voltage circuit 1, rectification circuit 2, voltage stabilizing circuit 3, filter circuit 4 conversion successively.
In the present embodiment, relay K is a normally closed switch, promptly works as capacitor and is in discharge condition, it is closed, at this moment, forms the loop between capacitor C and discharge resistance R, electric charge on the capacitor C discharges by discharge resistance, and at this moment, the capacitor switching switch is in open mode;
When the capacitor switching switch closure, at this moment, capacitor C will be in charged state, control circuit 10 also starts work, thereby drive relay K and disconnect being connected between capacitor C and the discharge resistance R, the situation of having avoided the rising of capacitor temperature can produce bulge or blast like this takes place, and has also saved the energy simultaneously.
Claims (3)
1. reactive power compensation capacitor discharge resistance automatic switching device, described reactive power compensation capacitor (C) two ends are connected with electrical network by capacitor switching switch (G), described discharge resistance (R) is in parallel with reactive power compensation capacitor (C) and is connected, it is characterized in that: this automatic switching device comprises the relay (K) that is connected between described reactive power compensation capacitor (C) and the discharge resistance (R), the control circuit (10) that is electrically connected with described relay (K) that is connected in parallel on described reactive power compensation capacitor (C) two ends, when described capacitor switching switch (G) is in closure state, described control circuit (10) control relay (K) disconnects being connected between capacitor (C) and the discharge resistance (R); (G) is in open mode when described fling-cut switch, described control circuit (10) control relay (K) connect capacitor (C) with discharge resistance (R) thus between be connected and make discharge resistance (R) that the energy storage on the capacitor (C) is discharged.
2. reactive power compensation capacitor discharge resistance automatic switching device according to claim 1, it is characterized in that: described relay (K) is a normally closed switch.
3. reactive power compensation capacitor discharge resistance automatic switching device according to claim 1 and 2 is characterized in that: described control circuit (10) comprises reduction voltage circuit (1), rectification circuit (2), voltage stabilizing circuit (3), filter circuit (4) and the relay drive circuit (5) that is electrically connected successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920188645 CN201478805U (en) | 2009-08-17 | 2009-08-17 | Automatic switching device for discharge resistance of reactive power compensation capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920188645 CN201478805U (en) | 2009-08-17 | 2009-08-17 | Automatic switching device for discharge resistance of reactive power compensation capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201478805U true CN201478805U (en) | 2010-05-19 |
Family
ID=42415061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920188645 Expired - Lifetime CN201478805U (en) | 2009-08-17 | 2009-08-17 | Automatic switching device for discharge resistance of reactive power compensation capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201478805U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368185A (en) * | 2012-03-31 | 2013-10-23 | 北京博瑞莱智能科技有限公司 | Intelligent electric power capacitor and application method thereof |
| CN107370162A (en) * | 2017-08-22 | 2017-11-21 | 江苏光大电控设备有限公司 | A kind of reactive power compensation cabinet |
-
2009
- 2009-08-17 CN CN 200920188645 patent/CN201478805U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368185A (en) * | 2012-03-31 | 2013-10-23 | 北京博瑞莱智能科技有限公司 | Intelligent electric power capacitor and application method thereof |
| CN103368185B (en) * | 2012-03-31 | 2016-05-04 | 北京博瑞莱智能科技集团有限公司 | Intelligent electric power capacitor and application process thereof |
| CN107370162A (en) * | 2017-08-22 | 2017-11-21 | 江苏光大电控设备有限公司 | A kind of reactive power compensation cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
|
| CX01 | Expiry of patent term |