CN106329510A - Arc suppression mechanism for arc suppression and resonance elimination apparatus - Google Patents
Arc suppression mechanism for arc suppression and resonance elimination apparatus Download PDFInfo
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- CN106329510A CN106329510A CN201610793245.3A CN201610793245A CN106329510A CN 106329510 A CN106329510 A CN 106329510A CN 201610793245 A CN201610793245 A CN 201610793245A CN 106329510 A CN106329510 A CN 106329510A
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- arc
- extinguishing
- unit
- phase
- arc suppression
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses an arc suppression mechanism for an arc suppression and resonance elimination apparatus. The mechanism comprises a tunable arc suppression coil unit, a fault phase rapid grounding unit, and a control unit, the tunable arc suppression coil unit is connected with a three-phase bus, the fault phase rapid grounding unit is connected with the three-phase bus and is connected with the tunable arc suppression coil unit in parallel at the same group of connecting lines, the control unit is connected with the tunable arc suppression coil unit and the fault phase rapid grounding unit, the control unit is used for monitoring the three-phase voltage, the zero-sequence voltage, the neutral-point voltage, and arc suppression coil current signals in real time, performing analysis and calculation, determining the fault phase and type and tracking an earth capacitor of a measuring system, and the control unit is also used for controlling motion of a corresponding unit and accomplishing work such as alarm and host computer communication etc. when faults occur. According to the mechanism, arc grounding faults can be rapidly eliminated, and the grounding current can be reduced to a safety level.
Description
Technical field
The present invention relates to electrical equipment technical field, particularly to a kind of arc-extinguishing resonance-extinguishing device extinguishing arc mechanism.
Background technology
Along with the development of present electrical network, it is that one necessarily becomes that overhead transmission line is progressively replaced by the cable run of solid insulation
Gesture.The build-up effect punctured due to solid insulation, its internal overvoltage, particularly during electrical network generation single-phase intermittent arc earthing
The arc grounding over-voltage produced and the ferro-resonance over-voltage thus excited, oneself becomes a big prestige of this kind of electric power netting safe running
The side of body, wherein the most serious with single-phase arc grounding over-voltage.It is saturated that arc grounding over-voltage can make voltage transformer occur, and excites
Ferromagnetic resonance, causes voltage transformer heavy overload, causes fuse blows or transformer to burn.Arc-extinguishing resonance-extinguishing device has another name called
(microcomputer arc extinguishing resonance eliminating wire-selection and overvoltage protection), is for 3-35KV isolated neutral, neutral point in power industry
Through grounding through arc or neutral point in the power system of high resistance ground, all kinds of overvoltage in system can be any limitation as,
It is effectively improved system safety in operation and power supply reliability.Arc-extinguishing resonance-extinguishing device generally comprises cabinet, microcomputerized controller (core
Center device, comprises the functions such as microcomputer harmonic elimination device, small current line selection), the PT in high-voltage mutual inductor, overvoltage protection device, fusing
Device, disconnecting switch, ZCT etc..
Existing arc-extinction device mainly uses automatic tuning arc depression coil and extinguishing arc and overvoltage protection；Automatically tuning
Arc suppression coil is when electrical network generation singlephase earth fault, it is provided that induction reactance, and compensation of ground capacitance current, to limit earth-fault current
Destruction so that ground arc easily extinguishes, after arc extinction, reduce fault phase recover voltage the rate of climb and
Its amplitude, it is to avoid arc reignition.But the automatic tuning apparatus that existing arc suppression coil is arranged works under the power frequency of electrical network, from
Dynamic tuning peterson coil cannot high fdrequency component in compensation network capacitance current, and arc suppression coil reactive power compensator, it is impossible to
Real component in compensation of ground electric current, these all can directly affect the automatic tuning arc depression coil compensation to earth current, also
Automatically the blow-out adjusting arc suppression coil can be produced harmful effect.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of arc-extinguishing resonance-extinguishing device extinguishing arc mechanism, it is possible to eliminate rapidly arc
Light earth fault, can make again earth current be reduced to level of security simultaneously.
In order to solve above-mentioned technical problem, technical scheme is as follows:
A kind of arc-extinguishing resonance-extinguishing device extinguishing arc mechanism, including tunable arc suppression coil unit, fault phase rapid grounding unit
And control unit；Described tunable arc suppression coil unit is connected with three-phase bus；Described fault phase rapid grounding unit and three
Phase bus connect, with described tunable arc suppression coil unit on same group of connecting line in parallel；Described control unit with described can
Tuning peterson coil unit and fault phase rapid grounding unit connect, for monitor in real time three-phase voltage, residual voltage and in
Property point voltage, arc suppression coil current signal, be analyzed calculating, it is judged that fault phase and type, and tracing measurement system be right
Ground electric capacity；When breaking down, control corresponding units action, complete to report to the police and with the work such as host computer communication.
Further, described tunable arc suppression coil unit passes through Z-type wiring transformer from three-phase bus draws one
It is connected with three-phase bus after property point.Z-type grounding transformer has the function increasing system unbalance voltage when system balancing,
Solve the problem that can not accurately measure capacitance current owing to system unbalance voltage is the least.
Further, include can the high-pressure vacuum contactor (FU) of individual-phase control and height for described fault phase rapid grounding unit
Pressure current limiter fuse (FUR).When there is single-phase arc grounding, controller sends instruction, makes the catalyst Guan Bi of corresponding phase；
When major issue Single Phase Metal ground connection, catalyst attonity.FUR be used for prevent because control unit erroneous judgement and cause alternate short
Road.
Further, described control unit includes that controller, signal acquisition circuit, signal conditioning circuit and relay drive
Dynamic model block；Described signal acquisition circuit is from described tunable arc suppression coil unit, described fault phase rapid grounding unit and three
Phase bus Real-time Collection three-phase voltage, residual voltage and neutral point voltage, arc suppression coil current signal；Described signal condition electricity
Road voltage signal in the range of the signal gathered is converted into the 0-5V that controller can process；Described relay drives
Module is according to the instruction execution of controller.
Further, described control unit also includes communication module, for by real to the signal gathered and action command
Time be sent to host computer.
Further, described control unit also includes Key and display circuit and failure alarm circuit；Described keyboard is with aobvious
Showing that circuit is arranged for parameter and parameter shows in real time, described failure alarm circuit is used for sending sound and light alarm.
Further, described signal conditioning circuit includes Noninverting summing operation link, RC filtering link and amplitude limit link.
Further, described signals collecting cable includes voltage transformer (current transformer) and rheostat, by scene
Voltage (electric current) signal of PT (CT) secondary side converts and the range of decrease processes.
Further, described relay driving module includes optical coupling and audion, described controller by optical coupling and
Audion drives the actuating of relay.
Use technique scheme, present invention employs fault phase rapid grounding unit and tie with automatic tuning arc depression coil
Close so that fault phase rapid grounding reliably extinguishes electric arc, and reduces grounded circuit by putting into arc suppression coil, so can be rapid
Eliminate arc grounding fault, earth current can be made again to be reduced to level of security simultaneously.
Accompanying drawing explanation
Fig. 1 is the arc-extinguishing resonance-extinguishing device extinguishing arc mechanism circuit figure of the present invention；
Fig. 2 is that the control unit of the present invention connects block diagram；
Fig. 3 is the relay drive circuit figure of the present invention；
Wherein, 10-three-phase bus, 20-tuning peterson coil unit, 30-fault phase rapid grounding unit, 40-Z type ground connection
Transformator, 50-control unit.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.At this it should be noted that for
The explanation of these embodiments is adapted to assist in and understands the present invention, but is not intended that limitation of the invention.Additionally, it is disclosed below
As long as each embodiment of the present invention in involved technical characteristic do not constitute conflict each other and just can be mutually combined.
As it is shown in figure 1, a kind of arc-extinguishing resonance-extinguishing device extinguishing arc mechanism, including tunable arc suppression coil unit 20, fault phase
Rapid grounding unit 30 and control unit；Described tunable arc suppression coil unit 20 is connected with three-phase bus 10；Described fault
Phase rapid grounding unit 30 is connected with three-phase bus, with described tunable arc suppression coil unit 20 on same group of connecting line also
Connection；Described control unit is connected with described tunable arc suppression coil unit 20 and fault phase rapid grounding unit 30, in real time
Monitoring three-phase voltage, residual voltage and neutral point voltage, arc suppression coil current signal, be analyzed calculating, it is judged that fault phase
And type, and the direct-to-ground capacitance of tracing measurement system；When breaking down, control corresponding units action, complete to report to the police and with upper
The work such as position machine communication.
Wherein, tunable arc suppression coil unit 20 is 8421 type Combined Arc Suppression Coil with Shunt Reactors, uses reactor
Group parallel-connection structure, the capacity of reactor L1, L2, L3, L4 is assigned as 1:2:4:8, four high voltage connectors K1, K2, K3, K4 divide
Kong Zhi not put into or exit by reactor, B1, B2, B3, B4 are spark gap.When system is properly functioning, catalyst is in disconnection shape
State, reactor logs off, and occurs to put into reactor according to the calculating of capacitance current during single-phase earthing, reaches entirely to compensate blow-out.
Wherein, described tunable arc suppression coil unit 20 draws one by Z-type wiring transformer 40 from three-phase bus 10
It is connected with three-phase bus after neutral point.Z-type grounding transformer 40 has the increase system unbalance voltage when system balancing
Function, solves the problem that can not accurately measure capacitance current owing to system unbalance voltage is the least.
Wherein, include can the high-pressure vacuum contactor FU of individual-phase control and high pressure limit for described fault phase rapid grounding unit 30
Stream device fuse FUR.When there is single-phase arc grounding, controller sends instruction, makes the catalyst Guan Bi of corresponding phase；Work as major issue
During Single Phase Metal ground connection, catalyst attonity.FUR is used for the phase fault preventing causing because of control unit erroneous judgement.
As in figure 2 it is shown, described control unit includes controller, signal acquisition circuit, signal conditioning circuit and relay
Drive module；Described signal acquisition circuit is from described tunable arc suppression coil unit 20, described fault phase rapid grounding unit 30
And three-phase bus Real-time Collection three-phase voltage, residual voltage and neutral point voltage, arc suppression coil current signal；Described signal
Modulate circuit voltage signal in the range of the signal gathered is converted into the 0-5V that controller can process；Described relay
Device drives module according to the instruction execution of controller.
Wherein, described control unit also includes communication module, for the signal gathered and action command being sent out in real time
Deliver to host computer.
Wherein, described control unit also includes Key and display circuit and failure alarm circuit；Described keyboard and display electricity
Road arranges for parameter and parameter shows in real time, and described failure alarm circuit is used for sending sound and light alarm.
Wherein, described signal conditioning circuit includes Noninverting summing operation link, RC filtering link and amplitude limit link.
Wherein, described signals collecting cable includes voltage transformer (current transformer) and rheostat, by on-the-spot PT
(CT) voltage (electric current) signal of secondary side converts and the range of decrease processes.
Wherein, described relay driving module includes optical coupling and audion, and described controller passes through optical coupling and three poles
Pipe drives the actuating of relay.As it is shown on figure 3,8 road relay drive circuits, difference driving malfunction phase high-pressure vacuum contactor JZ,
Catalyst K and the work of residual voltage relay in shunt reactor group.
This extinguishing arc angle steel Real-time Collection electrical network parameter, monitors operation of power networks state.When there is single-phase arc grounding, by event
Barrier phase rapid grounding, now fault phase relative voltage will be 0, and power frequency arc and hf electric arc all can extinguish immediately；Join simultaneously
Close and use tuning peterson coil, compensate system power-frequency earthing electric current, thus when eliminating single-phase arc grounding fault, fault is connected
The unsafe factor that brings.
Above in association with accompanying drawing, embodiments of the present invention are explained in detail, but the invention is not restricted to described enforcement
Mode.For a person skilled in the art, in the case of without departing from the principle of the invention and spirit, to these embodiments
Carry out multiple change, revise, replace and modification, still fall within protection scope of the present invention.
Claims (9)
1. an arc-extinguishing resonance-extinguishing device extinguishing arc mechanism, it is characterised in that: include that tunable arc suppression coil unit, fault phase are quick
Ground unit and control unit；Described tunable arc suppression coil unit is connected with three-phase bus；Described fault phase rapid grounding
Unit is connected with three-phase bus, with described tunable arc suppression coil unit on same group of connecting line in parallel；Described control unit
It is connected with described tunable arc suppression coil unit and fault phase rapid grounding unit, monitors three-phase voltage, zero sequence electricity in real time
Pressure and neutral point voltage, arc suppression coil current signal, be analyzed calculating, it is judged that fault phase and type, and tracking measurement
The direct-to-ground capacitance of system；When breaking down, control corresponding units action, complete to report to the police and with the work such as host computer communication.
A kind of arc-extinguishing resonance-extinguishing device the most according to claim 1 extinguishing arc mechanism, it is characterised in that: described tunable extinguishing arc
Coil unit is connected with three-phase bus after three-phase bus draws a neutral point by Z-type wiring transformer.
A kind of arc-extinguishing resonance-extinguishing device the most according to claim 1 extinguishing arc mechanism, it is characterised in that: described fault phase is quick
Ground unit includes can the high-pressure vacuum contactor of individual-phase control and high-voltage and current-limitation device fuse.
A kind of arc-extinguishing resonance-extinguishing device the most according to claim 1 extinguishing arc mechanism, it is characterised in that: described control unit bag
Include controller, signal acquisition circuit, signal conditioning circuit and relay driving module；Described signal acquisition circuit from described can
Tuning peterson coil unit, described fault phase rapid grounding unit and three-phase bus Real-time Collection three-phase voltage, residual voltage
And neutral point voltage, arc suppression coil current signal；Described signal conditioning circuit is for being converted into control by the signal gathered
Voltage signal in the range of the 0-5V that device can process；Described relay driving module is according to the instruction execution of controller.
A kind of arc-extinguishing resonance-extinguishing device the most according to claim 4 extinguishing arc mechanism, it is characterised in that: described control unit is also
Including communication module, for the signal gathered and action command are sent to host computer in real time.
A kind of arc-extinguishing resonance-extinguishing device the most according to claim 4 extinguishing arc mechanism, it is characterised in that: described control unit is also
Including Key and display circuit and failure alarm circuit；Described Key and display circuit arranges for parameter and parameter shows in real time
Showing, described failure alarm circuit is used for sending sound and light alarm.
A kind of arc-extinguishing resonance-extinguishing device the most according to claim 4 extinguishing arc mechanism, it is characterised in that: described signal condition electricity
Road includes Noninverting summing operation link, RC filtering link and amplitude limit link.
A kind of arc-extinguishing resonance-extinguishing device the most according to claim 4 extinguishing arc mechanism, it is characterised in that: described signals collecting electricity
Cable includes voltage transformer and rheostat, is converted by the voltage signal of on-the-spot PT secondary side and the range of decrease processes.
A kind of arc-extinguishing resonance-extinguishing device the most according to claim 4 extinguishing arc mechanism, it is characterised in that: described relay drives
Module includes optical coupling and audion, and described controller drives the actuating of relay by optical coupling and audion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610793245.3A CN106329510A (en) | 2016-08-30 | 2016-08-30 | Arc suppression mechanism for arc suppression and resonance elimination apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610793245.3A CN106329510A (en) | 2016-08-30 | 2016-08-30 | Arc suppression mechanism for arc suppression and resonance elimination apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN106329510A true CN106329510A (en) | 2017-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610793245.3A Pending CN106329510A (en) | 2016-08-30 | 2016-08-30 | Arc suppression mechanism for arc suppression and resonance elimination apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769185A (en) * | 2017-10-26 | 2018-03-06 | 国网山东省电力公司临朐县供电公司 | Synthesis arc-extinguishing harmonic-eliminating system based on microprocessor |
| CN110445115A (en) * | 2019-07-03 | 2019-11-12 | 中山职业技术学院 | A kind of more arc suppression coil auto parallel Connection fuzzy control methods |
| CN111786373A (en) * | 2020-06-30 | 2020-10-16 | 徐华 | Arc suppression coil control system |
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| CN104319757A (en) * | 2014-11-13 | 2015-01-28 | 中国矿业大学 | Arc suppression coil device and method for compensating for active component in single-phase grounding fault current |
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| CN201430438Y (en) * | 2009-03-27 | 2010-03-24 | 淮南矿业(集团)有限责任公司 | Arc-extinguishing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769185A (en) * | 2017-10-26 | 2018-03-06 | 国网山东省电力公司临朐县供电公司 | Synthesis arc-extinguishing harmonic-eliminating system based on microprocessor |
| CN110445115A (en) * | 2019-07-03 | 2019-11-12 | 中山职业技术学院 | A kind of more arc suppression coil auto parallel Connection fuzzy control methods |
| CN111786373A (en) * | 2020-06-30 | 2020-10-16 | 徐华 | Arc suppression coil control system |
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Application publication date: 20170111 |