CN201290009Y - Automatic switching device for discharge resistance of compensation condenser - Google Patents
Automatic switching device for discharge resistance of compensation condenser Download PDFInfo
- Publication number
- CN201290009Y CN201290009Y CNU2008202179995U CN200820217999U CN201290009Y CN 201290009 Y CN201290009 Y CN 201290009Y CN U2008202179995 U CNU2008202179995 U CN U2008202179995U CN 200820217999 U CN200820217999 U CN 200820217999U CN 201290009 Y CN201290009 Y CN 201290009Y
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- circuit
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- discharge resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
An auto-switching device for the discharge resistor of a compensation capacitor comprises a voltage acquisition circuit, a rectification circuit, a filter circuit and a switching circuit, wherein, the switching circuit is switched off, when voltage exists at the two ends of the auto-switching device, so that the capacitor is segregated from the discharge resistor; and the discharge resistor and the capacitor are closed when on voltage exists at the two ends of the auto-switching device, and the capacitor releases the energy stored by the capacitor through a resistor, so as to enable the resistor to be free of losses during the normal switching of the capacitor. The pointless heat quantity and the pointless energy loss generated at the two ends of the capacitor because that the discharge resistor of a conventional capacitor compensator is connected in parallel at the two ends of the capacitor are reduced. The adoption of the auto-switching device for the discharge resistor of a compensation capacitor can achieve the purpose of energy conservation.
Description
Technical field
The utility model relates to a kind of tracking condenser both end voltage automatically, according to capacitor voltage at both ends automatic switching compensation condenser discharge resistance, to reduce the switching device of the energy loss of discharge resistance own.
Background technology
In industry, enterprise's electric power system, because most power consumption equipments all belong to inductive load, these power consumption equipments except from electric power system is taken active power, are also taken a considerable amount of reactive powers when operation.Idle impact load also often appears in some production equipment (as milling train, arc furnace etc.) in process of production, and this impact load may increase 5～6 times than the reactive power of normally taking.Know that from Circuit theory the increase of reactive power reduces the power factor of electric power system.The reduction of power factor will cause: power loss increases in the electrical network loop; The loss of voltage increases in the electrical network loop; The power supply capacity of power supply unit descends, and the cost of electric energy increases.Power factor improves in order to reward enterprise in the People's Republic of China (PRC), when collecting charges for electricity by two electricity price systems, has stipulated to adjust according to the height of enterprise's power factor the additional system of rewards and penalties of the volume that collects charges for electricity.According to this system, the monthly average power factor is higher than the enterprise of setting, can by how many correspondingly reduction of income electricity charge that surpass, and when power factor is lower than setting, then increase income the electricity charge.In " whole nation is for the electricity consumption rule ", clearly stipulate, power factor is lower than at 0.7 o'clock, power administration can power, thereby no matter enterprise is from saving the electricity charge, improve power supply quality still from improving the power supply capacity of power supply unit, all must consider the measure of compensating power, the method of shunt capacitor realizes in electrical network and the compensation of reactive power is adopted usually, because the effect that capacitor has storage power, standard GB/T15576-1995 regulation, capacitor should be equipped with the discharge facility, the discharge facility should guarantee capacitor outage back from the rated voltage crest discharge to 50V, last and be not more than 1 minute, so compensation condenser all is equipped with discharge resistance at present, traditional method is that discharge resistance and compensation condenser are connected in parallel on the capacitor two ends always, and discharge resistance is only after the capacitor excision, the energy that just plays capacitor stores plays discharge process, and discharge resistance is put at capacitor and also is connected in parallel on the capacitor two ends when fading from memory network operation, resistance itself can generate heat, and produces energy loss.
The utility model content
Technical problem to be solved in the utility model provides a kind of tracking condenser both end voltage automatically, according to capacitor voltage at both ends automatic switching compensation condenser discharge resistance, to reduce the energy loss of discharge resistance own, reaches purpose of energy saving.
For solving the problems of the technologies described above, the utility model provides a kind of compensation condenser discharge resistance automatic switching device, comprises voltage collection circuit, rectification circuit, filter circuit and switching circuit; The input of voltage collection circuit is connected in parallel on the compensation condenser two ends, the output of voltage collection circuit and the input of rectification circuit are connected in parallel, the input of rectification circuit and the input of filter circuit are connected in parallel, and the input of filter circuit and switching circuit input are connected in parallel.
Voltage collection circuit adopts the series resistance bleeder circuit to gather the voltage signal at capacitor two ends, also can adopt voltage transformer to gather the voltage signal at capacitor two ends.
Rectification circuit constitutes half-wave rectifying circuit or full-wave rectifying circuit by diode, also can adopt rectifier bridge to constitute full-wave rectifying circuit, and the voltage signal at the capacitor two ends that voltage collection circuit obtains is delivered to the input of rectification circuit.
Filter circuit adopts capacitor filtering, and filter capacitor is connected in parallel on the output of rectification circuit.
Switching circuit is made of diode and direct current relay, and diode is connected in parallel on the relay coil two ends, and as the current circuit in the release relay coil, relay coil is connected in parallel on the two ends of filter circuit.
The utlity model has positive effect: in (1) compensation condenser discharge resistance of the present utility model automatic switching device, discharge resistance is formed a series loop by one group of normally-closed contact of relay and capacitor, the actuating of relay when there is voltage at the capacitor two ends, the relay normally-closed contact disconnects, the excision discharge resistance; And when the no-voltage of capacitor two ends relay normally-closed contact closure, connect discharge resistance, the purpose that discharge resistance does not consume energy when reaching switched capacitor.(2) compensation condenser discharge resistance automatic switching device of the present utility model can use separately, compensation condenser discharge resistance automatic switching device also can with discharge resistance with poured with epoxy resin together, be directly parallel in the capacitor two ends and use.
Description of drawings
Fig. 1 is the switching controller schematic diagram of embodiment 1.
Fig. 2 be embodiment 1 switching controller respectively with discharge resistance and capacitor connection layout.
Embodiment
See Fig. 1, Fig. 2, the compensation condenser discharge resistance automatic switching device of present embodiment comprises voltage collection circuit, rectification circuit, filter circuit and switching circuit; The input of voltage collection circuit is connected in parallel on the compensation condenser two ends, the output of voltage collection circuit and the input of rectification circuit are connected in parallel, the input of rectification circuit and the input of filter circuit are connected in parallel, and the input of filter circuit and switching circuit input are connected in parallel.
Two resistance series connection carrying out of the employing of the voltage collection circuit among Fig. 1 collection of voltage signal, series resistance R1 (resistance is bigger) and R2 (resistance is less) are connected in parallel on the capacitor two ends, has the dividing potential drop effect according to series resistance, adjust the resistance of R1 and R2, can obtain lower 12V ac voltage signal from the R2 two ends, the 12V ac voltage signal is by after the rectifier bridge rectification, obtain the d. c. voltage signal about 12V, again by obtaining comparatively stable voltage signal driving switch circuit (being relay) behind the 1000uF capacitor filtering, relay is selected the 12VDC relay for use, K switch among Fig. 2 (being the relay normally-closed contact) constitutes a series loop with discharge resistance R and capacitor C, controller is connected in parallel on capacitor C two ends, and there was voltage at the capacitor two ends, switching circuit work when contactor J was closed, K switch is opened, excision discharge resistance R; Capacitor C two ends no-voltage when contactor J disconnects, switching circuit is not worked, the K switch closure, in the discharge resistance R place in circuit, the electric energy that capacitor C is stored discharges by discharge resistance R.
Claims (5)
1, compensation condenser discharge resistance automatic switching device is characterized in that comprising voltage collection circuit (1), rectification circuit (2), filter circuit (3) and switching circuit (4); The input of voltage collection circuit (1) is connected in parallel on the compensation condenser two ends, the input of the output of voltage collection circuit (1) and rectification circuit (2) is connected in parallel, the input of the input of rectification circuit (2) and filter circuit (3) is connected in parallel, and the input of filter circuit (3) and switching circuit (4) input are connected in parallel.
2, compensation condenser discharge resistance automatic switching device as claimed in claim 1, it is characterized in that, voltage collection circuit (1) adopts the series resistance bleeder circuit to gather the voltage signal at capacitor two ends, also can adopt voltage transformer to gather the voltage signal at capacitor two ends.
3, compensation condenser discharge resistance automatic switching device as claimed in claim 1, it is characterized in that, rectification circuit (2) constitutes half-wave rectifying circuit or full-wave rectifying circuit by diode, also can adopt rectifier bridge to constitute full-wave rectifying circuit, the ac voltage signal at the capacitor two ends that voltage collection circuit (1) obtains is delivered to the input of rectification circuit (2).
4, compensation condenser discharge resistance automatic switching device as claimed in claim 1 is characterized in that, filter circuit (3) adopts capacitor filtering, and filter capacitor is connected in parallel on the output of rectification circuit (2).
5, compensation condenser discharge resistance automatic switching device as claimed in claim 1, it is characterized in that, switching circuit (4) is made of diode and direct current relay, and diode is connected in parallel on the relay coil two ends, and relay coil is connected in parallel on the two ends of filter circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202179995U CN201290009Y (en) | 2008-11-18 | 2008-11-18 | Automatic switching device for discharge resistance of compensation condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202179995U CN201290009Y (en) | 2008-11-18 | 2008-11-18 | Automatic switching device for discharge resistance of compensation condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201290009Y true CN201290009Y (en) | 2009-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202179995U Expired - Fee Related CN201290009Y (en) | 2008-11-18 | 2008-11-18 | Automatic switching device for discharge resistance of compensation condenser |
Country Status (1)
| Country | Link |
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| CN (1) | CN201290009Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064549A (en) * | 2009-11-11 | 2011-05-18 | 王海 | Switching method and switching switch circuit of AC capacitor |
| CN101699695B (en) * | 2009-12-07 | 2012-01-25 | 河南省电力公司许昌供电公司 | Discharge energy-saving type compensating capacitor device |
| CN106320866A (en) * | 2016-10-27 | 2017-01-11 | 江南大学 | Energy-saving sticking attraction type electric door catch |
| 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 |
-
2008
- 2008-11-18 CN CNU2008202179995U patent/CN201290009Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064549A (en) * | 2009-11-11 | 2011-05-18 | 王海 | Switching method and switching switch circuit of AC capacitor |
| CN102064549B (en) * | 2009-11-11 | 2016-03-16 | 王海 | AC capacitor operation/cutting method and fling-cut switch circuit |
| CN101699695B (en) * | 2009-12-07 | 2012-01-25 | 河南省电力公司许昌供电公司 | Discharge energy-saving type compensating capacitor device |
| CN106320866A (en) * | 2016-10-27 | 2017-01-11 | 江南大学 | Energy-saving sticking attraction type electric door catch |
| CN106320866B (en) * | 2016-10-27 | 2017-11-21 | 江南大学 | Energy-saving patch suction electric switch door bolt |
| 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20091218 |