CN104868462A - Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device - Google Patents

Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device Download PDF

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Publication number
CN104868462A
CN104868462A CN201510289063.8A CN201510289063A CN104868462A CN 104868462 A CN104868462 A CN 104868462A CN 201510289063 A CN201510289063 A CN 201510289063A CN 104868462 A CN104868462 A CN 104868462A
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China
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voltage
phase
vacuum contactor
extinguishing
voltage transformer
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CN201510289063.8A
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Chinese (zh)
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不公告发明人
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Anhui Lu Xun Electronic Science And Technology Co Ltd
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Anhui Lu Xun Electronic Science And Technology Co Ltd
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Priority to CN201510289063.8A priority Critical patent/CN104868462A/en
Publication of CN104868462A publication Critical patent/CN104868462A/en
Pending legal-status Critical Current

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Abstract

A microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device relates to the technical field of arc extinguishing and harmonic eliminating of an electric power system. The microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device comprises a high-voltage current-limiting fuse, a voltage transformer, a three-phase combined type overvoltage protector, a vacuum contactor, a microcomputer arc-extinguishing controller, a high-voltage fuse, and a zero-sequence current transformer, wherein three-phase ports of the three-phase combined type overvoltage protector are respectively connected with a three-phase high-voltage isolation switch; a grounding terminal of the three-phase combined type overvoltage protector is connected with the voltage transformer and then grounded; the high-voltage fuse is connected in series between three-phase ports of the voltage transformer and the three-phase high-voltage isolation switch; a voltage transformer control terminal of the microcomputer arc-extinguishing controller is connected with the voltage transformer; a vacuum contactor control terminal of the microcomputer arc-extinguishing controller is connected with the vacuum contactor; three-phase ports of the high-voltage current-limiting fuse are respectively connected with the three-phase high-voltage isolation switch, while the other ends of the high-voltage current-limiting fuse are connected with the vacuum contactor; a grounding terminal of the vacuum contactor is grounded; and the zero-sequence current transformer is arranged between the grounding terminal of the vacuum contactor and a grounding point. The overvoltage-protecting device is high in action speed and capable of arc-extinguishing and harmonic-eliminating.

Description

Microcomputer arc extinguishing harmonic elimination and overvoltage protection
Technical field
The present invention relates to electric power system extinguishing arc, harmonic elimination technical field, be specifically related to a kind of microcomputer arc extinguishing harmonic elimination and over-pressure safety device.
Background technology
In the electric power system of current 3-35KW neutral point indirect earthing; because all kinds of overvoltage protection device is without extinguishing arc, harmonic elimination function; or function singleness; thus can not effectively avoid because of the atmospheric over-voltage that system is alternate and cause between phase ground, the single-phase generation to accidents such as having a rest property arc grounding over-voltage, ferro-resonance over-voltages, these overvoltage form certain threat to the life-span of power system device and security of operation.
Summary of the invention
The object of this invention is to provide a kind of quick action.The overvoltage protection of energy extinguishing arc, harmonic elimination.
In order to solve problem existing in background technology, the present invention is by the following technical solutions: it comprises high-voltage and current-limitation fuse FU, voltage transformer pt, three phase combined over-voltage protector LBP, vacuum contactor JZ microcomputer arc extinguishing controller ZK, high-tension fuse RD, zero sequence current mutual inductor LH;
Described microcomputer arc extinguishing controller ZK comprises voltage transformer control end, vacuum contactor control end;
The three-phase port of described three-phase combined voltage protector LBP connects three-phase high-voltage isolating switch respectively.Three phase combined over-voltage protector LBP earth terminal is connected by ground connection with voltage transformer pt, high-tension fuse RD is in series with between the three-phase port of voltage transformer pt and three-phase high-voltage isolating switch, the voltage transformer control end of microcomputer arc extinguishing controller ZK is connected with voltage transformer pt, vacuum contactor control end is connected with vacuum contactor JZ, the three-phase port of high-voltage and current-limitation fuse FU connects three-phase high-voltage isolating switch respectively, another termination vacuum contactor JZ, vacuum contactor JZ earth terminal ground connection, zero sequence current mutual inductor LH is provided with between vacuum contactor JZ earth terminal and earth point.
When there is arc grounding; this device can be read by fault phase directly soon; overvoltage relatively all kinds of and between phase and phase is all limited in lower voltage levvl; reduce the insulation fault and Explosion of on Arrester accident that cause thus; when there is metallic ground; then greatly can reduce touch voltage and step voltage; be conducive to guaranteeing personal safety; when there is voltage transformer pt disconnection fault; device output contact signal, so that with user to likely causing the relaying protection of misoperation to carry out locking because voltage transformer pt breaks.
Microcomputer arc extinguishing harmonic elimination of the present invention and overvoltage protection; with microcomputer arc extinguishing controller for core control part; the signal provided according to voltage transformer is very much to judge the separate and fault type of fault and to show; individual-phase control high pressure vacuum contactor is controlled according to the mode of setting; according to the maximum principle of faulty line Sudden Changing Rate before and after ground arc extinguishes, select faulty line colleague and export passive switch amount contact point signal.Thus quick action of the present invention, effectively solve the problem such as extinguishing arc, harmonic elimination in overvoltage protection.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present invention.
Embodiment
See Fig. 1, a kind of microcomputer arc extinguishing harmonic elimination and over-pressure safety device, it comprises high-voltage and current-limitation fuse FU, voltage transformer pt, three phase combined over-voltage protector LBP, vacuum contactor JZ microcomputer arc extinguishing controller ZK, high-tension fuse RD, zero sequence current mutual inductor LH;
Described microcomputer arc extinguishing controller ZK comprises voltage transformer control end, vacuum contactor control end;
The three-phase port of described three-phase combined voltage protector LBP connects three-phase high-voltage isolating switch respectively.Three phase combined over-voltage protector LBP earth terminal is connected by ground connection with voltage transformer pt, high-tension fuse RD is in series with between the three-phase port of voltage transformer pt and three-phase high-voltage isolating switch, the voltage transformer control end of microcomputer arc extinguishing controller ZK is connected with voltage transformer pt, vacuum contactor control end is connected with vacuum contactor JZ, the three-phase port of high-voltage and current-limitation fuse FU connects three-phase high-voltage isolating switch respectively, another termination vacuum contactor JZ, vacuum contactor JZ earth terminal ground connection, zero sequence current mutual inductor LH is provided with between vacuum contactor JZ earth terminal and earth point.
When there is arc grounding; this device can be read by fault phase directly soon; overvoltage relatively all kinds of and between phase and phase is all limited in lower voltage levvl; reduce the insulation fault and Explosion of on Arrester accident that cause thus; when there is metallic ground; then greatly can reduce touch voltage and step voltage; be conducive to guaranteeing personal safety; when there is voltage transformer pt disconnection fault; device output contact signal, so that with user to likely causing the relaying protection of misoperation to carry out locking because voltage transformer pt breaks.
Microcomputer arc extinguishing harmonic elimination of the present invention and overvoltage protection; with microcomputer arc extinguishing controller for core control part; the signal provided according to voltage transformer is very much to judge the separate and fault type of fault and to show; individual-phase control high pressure vacuum contactor is controlled according to the mode of setting; according to the maximum principle of faulty line Sudden Changing Rate before and after ground arc extinguishes, select faulty line colleague and export passive switch amount contact point signal.Thus quick action of the present invention, effectively solve the problem such as extinguishing arc, harmonic elimination in overvoltage protection.

Claims (1)

1. microcomputer arc extinguishing harmonic elimination and overvoltage protection, it is characterized in that, it comprises high-voltage and current-limitation fuse (FU), voltage transformer (PT), three phase combined over-voltage protector (LBP), vacuum contactor (JZ) microcomputer arc extinguishing controller (ZK), high-tension fuse (RD), zero sequence current mutual inductor (LH);
Described microcomputer arc extinguishing controller (ZK) comprises voltage transformer control end, vacuum contactor control end;
The three-phase port of described three-phase combined voltage protector (LBP) connects three-phase high-voltage isolating switch respectively, three phase combined over-voltage protector (LBP) earth terminal is connected by ground connection with voltage transformer (PT), high-tension fuse (RD) is in series with between the three-phase port of voltage transformer (PT) and three-phase high-voltage isolating switch, the voltage transformer control end of microcomputer arc extinguishing controller ZK is connected with voltage transformer (PT), vacuum contactor control end is connected with vacuum contactor (JZ), the three-phase port of high-voltage and current-limitation fuse (FU) connects three-phase high-voltage isolating switch respectively, another termination vacuum contactor (JZ), vacuum contactor (JZ) earth terminal ground connection, vacuum contactor (JZ) is provided with zero sequence current mutual inductor (LH) between earth terminal and earth point.
CN201510289063.8A 2015-06-01 2015-06-01 Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device Pending CN104868462A (en)

Priority Applications (1)

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CN201510289063.8A CN104868462A (en) 2015-06-01 2015-06-01 Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510289063.8A CN104868462A (en) 2015-06-01 2015-06-01 Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device

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CN104868462A true CN104868462A (en) 2015-08-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107394762A (en) * 2017-07-01 2017-11-24 合肥东玖电气有限公司 A kind of distribution extinguishing arc and overvoltage protection system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090180229A1 (en) * 2008-01-10 2009-07-16 Wen-Chang Lee Over-voltage protection circuit structure and method thereof
CN202424162U (en) * 2011-11-16 2012-09-05 安徽曼瑞特电气有限公司 Microcomputer arc and harmonic elimination and overvoltage protection device
CN203180517U (en) * 2013-01-22 2013-09-04 合肥隆科电力设备有限责任公司 Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090180229A1 (en) * 2008-01-10 2009-07-16 Wen-Chang Lee Over-voltage protection circuit structure and method thereof
CN202424162U (en) * 2011-11-16 2012-09-05 安徽曼瑞特电气有限公司 Microcomputer arc and harmonic elimination and overvoltage protection device
CN203180517U (en) * 2013-01-22 2013-09-04 合肥隆科电力设备有限责任公司 Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107394762A (en) * 2017-07-01 2017-11-24 合肥东玖电气有限公司 A kind of distribution extinguishing arc and overvoltage protection system

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Application publication date: 20150826