CN102142680A - Intelligent resistance-capacitance absorption and over-voltage comprehensive protection device - Google Patents
Intelligent resistance-capacitance absorption and over-voltage comprehensive protection device Download PDFInfo
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- CN102142680A CN102142680A CN2011101182431A CN201110118243A CN102142680A CN 102142680 A CN102142680 A CN 102142680A CN 2011101182431 A CN2011101182431 A CN 2011101182431A CN 201110118243 A CN201110118243 A CN 201110118243A CN 102142680 A CN102142680 A CN 102142680A
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Abstract
The invention discloses an intelligent resistance-capacitance absorption and over-voltage comprehensive protection device. The technical scheme is that: a combined over-voltage protector, a voltage transformer, a high-voltage fuse, a controllable resistance-capacitance absorber, a high-voltage current-limiting fuse and an isolating switch are connected to a system bus simultaneously in series; an intelligent microcomputer controller adopts a peripheral interface controller (PIC) singlechip; a voltage signal is transmitted to a central chip for processing through a current sampling circuit and an analogue-to-digital conversion circuit; and control nodes are finally output by control relays. The intelligent resistance-capacitance absorption and over-voltage comprehensive protection device can limit operation of all kinds of over-voltages effectively and is a complete set of over-voltage protection device. When a system generates an operating over-voltage, the controllable resistance-capacitance absorber is connected; and when the system becomes normal, the controllable resistance-capacitance absorber is disconnected, and an additional capacitive current is not added into the system. The device is a high-technology product which is energy-saving and environment-friendly, effectively improves the quality of electric energy and contributes to the intelligence of a grid.
Description
Technical field
The present invention relates to a kind of electrical power trans mission/distribution system absorbs and the overvoltage comprehensive protector with intelligent capacitance-resistance; specifically be to absorb all kinds of switching overvoltages rapidly, effectively to suppress all kinds of superpotential devices such as lightning overvoltage, atmospheric over-voltage, ferro resonance by Based Intelligent Control in a kind of electrical power trans mission/distribution system, belong to the power transmission and distribution field.
Background technology
In the electrical power trans mission/distribution system of China, all kinds of overvoltage injuries are very serious, adopted various overvoltage protections in the electrical network, and such as limiting lightning overvoltage, atmospheric over-voltage with lightning arrester, overvoltage protection device, effect is more remarkable; Especially adopt rc absorber to absorb switching overvoltage, obtained good effect.But rc absorber is connected in the electrical network for a long time, has not only expended a large amount of electric energy, and system has additionally been increased capacitance current, causes the small current system comprehensive protector to occur erroneous judgement, misoperation often, has increased the accident odds on the contrary.
Summary of the invention
Purpose of the present invention discloses a kind of intelligent capacitance-resistance and absorbs and the overvoltage comprehensive protector.Reach the purpose of the overvoltage that limits effectively in the electrical power trans mission/distribution system, lightning overvoltage, atmospheric over-voltage, simultaneously and effectively saves energy.
Technical scheme of the present invention is as described below:
Combined type overvoltage protection device and isolating switch are connected in series in system busbar; voltage transformer, high-tension fuse and isolating switch are connected in series in system busbar; controllable type rc absorber, high-voltage and current-limitation fuse and isolating switch are connected in series in system busbar; intelligent microcomputerized controller is gathered three-phase voltage and residual voltage signal from voltage transformer, the output control signal.
The invention is characterized in: the controllable type rc absorber can and cut-off in protected electrical network according to intelligent microcomputerized controller instruction connection.
Its feature also is: intelligent microcomputerized controller output relay signal controlling controllable type rc absorber.
Its feature also is: the combined type overvoltage protection device that has adopted the double loop design.
Its feature also is: all electric components all is installed in the complete cabinet of high pressure.
After the present invention has adopted technique scheme, can limit various overvoltage such as switching overvoltage, resonance overvoltage, atmospheric over-voltage, lightning overvoltage effectively, be the complete overvoltage protection the complete sets of equipment of a cover.Owing to increased intelligent microcomputerized controller and controllable type rc absorber, when system produces switching overvoltage, connect the controllable type rc absorber, when system restoration just often, disconnect the controllable type rc absorber, system is not increased extra capacity current when system normally moves, and energy-saving effect is very obvious, has reduced loss.With a 35KV system is example, according to preliminary Theoretical Calculation, longer-term is connected to about 16.6 ten thousand degree of the annual economize on electricity of rc absorber list group of electrical network, be equivalent to about 165 tons of the annual reducing emission of carbon dioxide of thermal power generation, reduce discharging pernicious gases such as a large amount of sulfur dioxide simultaneously, this device can be integrated in the complete cabinet of high pressure, with PT cabinet compatibility, be a kind of energy-conserving and environment-protective, effectively improve the quality of power supply, be beneficial to the intelligentized high-tech product of electrical network.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is circuit theory diagrams of the present invention.
Accompanying drawing 3 is intelligent microcomputerized controller operation principle schematic diagrames of the present invention.
Description of reference numerals is as follows: intelligent microcomputerized controller 1, controllable type rc absorber 2, combined type overvoltage protection device 3, voltage transformer 4, high-voltage and current-limitation fuse 5, high-tension fuse 6, isolating switch 7.
Embodiment
For making the foregoing invention feature and advantage become clear more and understanding easily, the present invention is described in detail below in conjunction with accompanying drawing and specific embodiment.
Shown in Figure 2 as Fig. 1; combined type overvoltage protection device of the present invention (3) is connected in series in system busbar with isolating switch (7); voltage transformer (4), high-tension fuse (6) are connected in series in system busbar with isolating switch (7); controllable type rc absorber (2), high-voltage and current-limitation fuse (5), be connected in series in system busbar with isolating switch (7); intelligent microcomputerized controller (1) is gathered three-phase voltage and residual voltage signal from voltage transformer (4), the output control signal.
Its feature also is: controllable type rc absorber (2) can be according to intelligent microcomputerized controller (1) instruction, connects and cut-offs in protected electrical network.
Its feature also is: intelligent microcomputerized controller (1) output relay signal controlling controllable type rc absorber (2).
Its feature also is: the combined type overvoltage protection device (3) that has adopted the double loop design.
Its feature also is: all electric components all is installed in the complete cabinet of high pressure.
As shown in Figure 3, intelligence microcomputerized controller (1) adopts the PIC series monolithic of a new generation, four road voltage signals, current sampling circuit through four routing resistances, electric capacity, current transformer connection in series-parallel composition, deliver to central processing element computing, processing through analog to digital conversion circuit again, deliver to three triodes through a series of circuit conversion, be series at three control relays, finally export Control Node.
This controller extracts three-phase voltage and residual voltage signal from instrument transformer, take current signal through internal circuit, the failure judgement classification, if generation switching overvoltage, then export JK Control Node signal,, then export KX and eliminate the resonance node signal if ferro-resonance over-voltage takes place, if the metallic earthing fault takes place, then exports KJ fault alarm node signal.
It should be noted that; top specific descriptions are not to be used to limit the present invention just in order to explain the present invention, and specific embodiment is exemplary; any improvement and distortion that those skilled in the art carries out on the basis of the foregoing description all can drop in protection scope of the present invention.Protection scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. intelligent capacitance-resistance absorbs and the overvoltage comprehensive protector; it is characterized in that: combined type overvoltage protection device (3) is connected in series in system busbar with isolating switch (7); voltage transformer (4), high-tension fuse (6) are connected in series in system busbar with isolating switch (7); controllable type rc absorber (2), high-voltage and current-limitation fuse (5) are connected in series in system busbar with isolating switch (7); intelligent microcomputerized controller (1) is gathered three-phase voltage and residual voltage signal from voltage transformer (4), the output control signal.
2. intelligent capacitance-resistance according to claim 1 absorbs and the overvoltage comprehensive protector, it is characterized in that: controllable type rc absorber (2) according to intelligent microcomputerized controller (1) instruction connect and cut-off in protected electrical network.
3. intelligent capacitance-resistance according to claim 1 absorbs and the overvoltage comprehensive protector, it is characterized in that: intelligent microcomputerized controller (1) output relay signal controlling controllable type rc absorber (2).
4. intelligent capacitance-resistance according to claim 1 absorbs and the overvoltage comprehensive protector, it is characterized in that: the combined type overvoltage protection device (3) that has adopted the double loop design.
5. intelligent capacitance-resistance according to claim 1 absorbs and the overvoltage comprehensive protector, it is characterized in that: all electric components all is installed in the complete cabinet of high pressure.
6. intelligent capacitance-resistance according to claim 1 absorbs and the overvoltage comprehensive protector; it is characterized in that: intelligent microcomputerized controller (1) adopts the PIC series monolithic; four road voltage signals; current sampling circuit through four routing resistances, electric capacity, current transformer connection in series-parallel composition; deliver to central processing element computing, processing through analog to digital conversion circuit again; deliver to three triodes through a series of circuit conversion, be series at three control relays, finally export Control Node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101182431A CN102142680A (en) | 2011-05-11 | 2011-05-11 | Intelligent resistance-capacitance absorption and over-voltage comprehensive protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101182431A CN102142680A (en) | 2011-05-11 | 2011-05-11 | Intelligent resistance-capacitance absorption and over-voltage comprehensive protection device |
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| CN102142680A true CN102142680A (en) | 2011-08-03 |
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| CN2011101182431A Pending CN102142680A (en) | 2011-05-11 | 2011-05-11 | Intelligent resistance-capacitance absorption and over-voltage comprehensive protection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412509A (en) * | 2011-12-02 | 2012-04-11 | 川铁电气（天津）集团有限公司 | Contact network overvoltage protection device |
| CN103280819A (en) * | 2013-05-31 | 2013-09-04 | 国家电网公司 | Paralleling reactor compensation loop of transformer substation and compensation method of paralleling reactor compensation loop of transformer substation |
| CN108808646A (en) * | 2018-07-11 | 2018-11-13 | 云南电网有限责任公司电力科学研究院 | A kind of resistance-capacitance absorption device absorbing VFTO |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2817170Y (en) * | 2005-08-19 | 2006-09-13 | 安徽赛普电气有限公司 | Arc-resonance extinction route-selecting over voltage protection device |
| CN202042896U (en) * | 2011-05-11 | 2011-11-16 | 陕西同远机电有限公司 | Intelligent resistance and capacitance protection and overvoltage integrated protection device |
-
2011
- 2011-05-11 CN CN2011101182431A patent/CN102142680A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2817170Y (en) * | 2005-08-19 | 2006-09-13 | 安徽赛普电气有限公司 | Arc-resonance extinction route-selecting over voltage protection device |
| CN202042896U (en) * | 2011-05-11 | 2011-11-16 | 陕西同远机电有限公司 | Intelligent resistance and capacitance protection and overvoltage integrated protection device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412509A (en) * | 2011-12-02 | 2012-04-11 | 川铁电气（天津）集团有限公司 | Contact network overvoltage protection device |
| CN102412509B (en) * | 2011-12-02 | 2014-02-12 | 川铁电气（天津）集团有限公司 | Contact network overvoltage protection device |
| CN103280819A (en) * | 2013-05-31 | 2013-09-04 | 国家电网公司 | Paralleling reactor compensation loop of transformer substation and compensation method of paralleling reactor compensation loop of transformer substation |
| CN103280819B (en) * | 2013-05-31 | 2014-12-03 | 国家电网公司 | Paralleling reactor compensation loop of transformer substation and compensation method of paralleling reactor compensation loop of transformer substation |
| CN108808646A (en) * | 2018-07-11 | 2018-11-13 | 云南电网有限责任公司电力科学研究院 | A kind of resistance-capacitance absorption device absorbing VFTO |
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Application publication date: 20110803 |
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