CN106877305A - New arc suppression coil earthing compensation device with grounding shunt function - Google Patents
New arc suppression coil earthing compensation device with grounding shunt function Download PDFInfo
- Publication number
- CN106877305A CN106877305A CN201710130176.2A CN201710130176A CN106877305A CN 106877305 A CN106877305 A CN 106877305A CN 201710130176 A CN201710130176 A CN 201710130176A CN 106877305 A CN106877305 A CN 106877305A
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- suppression coil
- arc suppression
- grounding
- earthed switch
- compensation device
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/083—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for three-phase systems
-
- 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
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a kind of new arc suppression coil earthing compensation device with grounding shunt function, belong to power system to singlephase earth fault compensation deals technical field, the arc suppression coil XL for being connected and being grounded including grounding transformer JDB and with grounding transformer JDB neutral points, also include the earthed switch for being respectively connected with electrical system bus and being grounded, earthed switch is arranged in parallel with grounding transformer JDB and arc suppression coil XL, arc suppression coil XL and earthed switch with can detect busbar voltage and the automaton of power system capacitive earth current and be connected.The present invention can quickly be compensated and shunt the electric current of transfer earth fault, and can accurately select earth fault line, so as to realize power matching network system safe and stable operation and personal safety.
Description
Technical field
The present invention relates to a kind of new arc suppression coil earthing compensation device with grounding shunt function, belong to power system
To singlephase earth fault compensation deals technical field, the place of singlephase earth fault in distribution small current neutral grounding system is particularly well-suited to
Reason.
Background technology
More than the 80% of the system failure is in singlephase earth fault, therefore small current neutral grounding system in small current neutral grounding system
Arc suppression coil reactive power compensator or earthed switch part flow arrangement etc. can be used.
The effect of arc suppression coil be when power network is single-phase there is short trouble when, capacitance current, arc suppression coil are flowed through in trouble point
There is provided inductive current to compensate, current in the fault point is down to below 10A.The inductive current for flowing through arc suppression coil and the electric capacity for flowing through
Electric current adds up to the electric current for flowing through short circuit grounding point, and current phase difference 180 degree, mutually compensates on inductance capacitance.When two electric currents
Value less than occur electric arc minimum current when, electric arc would not occur, and arc light is restriked after preventing current over-zero, reaches arc extinguishing
Purpose, prevent accident from further expanding.
In the system of the neutral by arc extinction coil grounding of grounding transformer, when there is singlephase earth fault, extinguishing arc
Coil can compensate for the capacitance current of power system, so as to reduce current in the fault point so that electric arc can not restrike, and maintain electricity
The safe operation of Force system.But the failure end route selection difficulty of line selection apparatus is increased due to the compensating action of arc suppression coil, always
Since neutral by arc extinction coil grounding system, the accuracy rate of route selection is all than relatively low.
The effect of earthed switch is that, when power system phase transmission line of electricity occurs the similar failures such as ground connection, earthed switch will
This is mutually grounded, with the electric current for reducing the fault point.In isolated neutral system, when there is singlephase earth fault, by right
The differentiation of failure phase, faulted phase voltage is forced and the earth equipotential, and earthed switch forms parallel circuit with actual fault point, right
Actual fault point electric current is shunted, shifted so that fault point voltage reduction, makes electric arc to restrike, and safeguards system is transported safely
OK；And when capacitance current is excessive, with the system that this transfer earthing mode runs, the impact to power system is larger.In addition
Because the electric charge that isolated neutral system only has voltage transformer pt neutral ground, system direct-to-ground capacitance storage can only pass through
Voltage transformer pt is leaked, and after failure vanishes, failure is when mutually exiting, and easily triggers voltage transformer pt resonance.
Traditional power system by shifting earthing mode operation, when earth fault occurs, failure is mutually switched on and off and connects
Behind ground, when causing out-phase to be grounded again due to reasons such as failure phase changes, trouble point ground short circuit alternate with transfer earth point is caused,
So as to line tripping accident occur, power supply reliability is reduced；Pay no attention to for instantaneity, intermittent arc grounding failure effect
Think.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of new arc suppression coil ground connection with grounding shunt function
Compensation device, not only can fast transfer actual fault point electric current, and improve route selection accuracy rate so that effectively protection failure show
, distribution network systems safety and stability reliability service is realized, guarantee personal safety.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of new arc suppression coil earthing compensation device with grounding shunt function, including grounding transformer JDB and with connect
The ground transformer JDB neutral points arc suppression coil XL that connects and be grounded, also including being respectively connected with electrical system bus and is grounded
Earthed switch, earthed switch is arranged in parallel with grounding transformer JDB and arc suppression coil XL, arc suppression coil XL and earthed switch with
The automaton connection of busbar voltage and power system capacitive earth current can be detected.
Technical solution of the present invention further improvement is that：Earthed switch includes three single-phase earthings switch JDK and open circuits
Device Kz, is connected after three single-phase earthing switch JDK parallel connections with breaker Kz, and three single-phase earthing switch JDK are controlled with automatic respectively
Device connection processed.
Technical solution of the present invention further improvement is that：Earthed switch is three and is independently connected with the triple line of bus
Breaker Kz, three breaker Kz are connected with automaton respectively.
Technical solution of the present invention further improvement is that：Automaton is with to be connected to grounding transformer JDB neutral
Point the voltage transformer for detecting neutral point displacement voltage U0, be arranged on the ground path of arc suppression coil XL for examining
Survey arc suppression coil XL loop currents I0 sensor, be arranged on the ground path of earthed switch for detecting earthed switch electricity
The sensor connection of stream；Automaton controls the access of arc suppression coil XL by detecting neutral point displacement voltage U0 and breaks
Open, automaton adjusts arc suppression coil XL by detecting power system capacitance current over the ground, automaton leads to
Cross detection neutral point displacement voltage U0 to control earthed switch to disconnect and put into, ground connection is controlled by detecting earthed switch electric current
Switch off and put into.
Technical solution of the present invention further improvement is that：Automaton be arranged in parallel in power system output line
Some line fault alignment systems connection on road.
Technical solution of the present invention further improvement is that：Line fault alignment system is optical fiber temperature-measurement fault location system
System, optical fiber temperature-measurement fault location system includes the temperature-measuring optical fiber TMOF being connected with automaton.
By adopting the above-described technical solution, the technological progress that the present invention is obtained is：
The present invention is a kind of new grounding through arc compensation device, using the new method of operation, in power matching network system
In the neutral point drawn by grounding transformer JDB be grounded through arc suppression coil XL, and coordinate the earthed switch to carry out current in the fault point
Shunting transfer, realizes distribution network systems safe and stable operation.The present invention takes full advantage of the advantage and earthed switch of arc suppression coil XL
Failure the characteristics of shunt, solve distribution network systems and high resistance ground, intermittent arc grounding and metallic earthing etc. occurring
Ground compensation and failure line selection, localization of fault problem during singlephase earth fault.
The present invention using arc suppression coil can compensate for capacitance current the characteristics of, in small current neutral grounding system, when system without
During neutral point by grounding transformer JDB draw neutral point, neutral point through arc suppression coil XL be grounded, when system occur instantaneity or
During intermittent defect, first compensated by arc suppression coil XL, reach the quick purpose for extinguishing electric arc, if ground connection disappears, disappeared
Arc coil XL exits compensating coefficient, and system recovers normal operation, so as to avoid because instantaneity or intermittence are grounded initiation in short-term
Fault spread.
For permanent fault, differentiate which is specially mutually breaks down, and then starts ground connection point by automaton
Stream function, will Earth Phase shunting ground connection is carried out by earthed switch, so as to displaced the electric current of actual fault point, protect therefore
The person and equipment safety at barrier scene, improve the reliability of system safety operation.Simultaneously because the compensating action of arc suppression coil,
The electric current for passing through earthed switch significantly reduces with respect to the system value without arc extinction compensation, reduces the switching of earthed switch
The impact that is brought to system of action, improves operation and Personal Safety, and using being thrown in earthed switch branching process, cut
The change of the earth point electric current of generation carries out failure line selection, and accuracy rate is high, and can be repeated several times.
Earthed switch includes three single-phase earthings switch JDK and breaker Kz, or three with the triple line of bus
The breaker Kz of independent connection, two kinds of setting structures take into account actual effect and engineering cost, are easy to live flexibly selection.
Present invention utilizes advanced optical fiber temperature-measurement FLT in fault location and failure line selection problem, pass through
Control the mutation of current in the fault point and trigger the change of trouble point temperature, then by automaton by temperature-measuring optical fiber to line
The temperature on road is detected that such as can be set at interval of 80~100m is monitoring point at, carries out failure line selection and trouble point is fixed
Position.
The present invention, as the core cell of automaton, is mainly responsible for arc blowout wire using high performance embedded system
Enclose the control of XL, the measurement of the measurement of voltage x current, the calculating of system capacitive earth current, and Ua, Ub, Uc, U0；By right
The collection of analog signal mutually differentiates to earth fault, according to the switching of logic control earthed switch has been set, so as to realize list
The diverter function of phase earth fault；By the control realization temperature survey to temperature-measuring optical fiber TMOF1~temperature-measuring optical fiber TMOFn, and
Coordinate switching record temperature data and the corresponding position of earthed switch, faulty line and event are determined by temperature increment maximum point
Position of the barrier point in faulty line, realizes failure line selection and fault location, and act front and rear zero sequence by earthed switch
Disturbance is examined route selection result, it is ensured that the accuracy of route selection.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present invention.
Specific embodiment
The present invention is described in further details with reference to embodiment：
Embodiment 1
As shown in figure 1, a kind of new arc suppression coil earthing compensation device with grounding shunt function, including grounding transformer
The JDB and arc suppression coil XL for being connected and being grounded with grounding transformer JDB neutral points, also including being connected with electrical system bus are each
The earthed switch for connecing and being grounded, earthed switch is arranged in parallel with grounding transformer JDB and arc suppression coil XL, arc suppression coil XL and connects
Ground switch with can detect busbar voltage and the automaton of power system capacitive earth current and be connected.
Earthed switch includes three single-phase earthing switch JDK（Ka、Kb、Kc）With a breaker Kz, three single-phase earthings
Switch JDK（Ka、Kb、Kc）Connected with breaker Kz after parallel connection, three single-phase earthing switch JDK connect with automaton respectively
Connect.
Automaton and the electricity for detecting neutral point displacement voltage U0 for being connected to grounding transformer JDB neutral points
Pressure transformer, the sensor for detecting arc suppression coil XL loop currents I0 being arranged on the ground path of arc suppression coil XL,
The sensor for detecting earthed switch electric current being arranged on the ground path of earthed switch is connected；Automaton passes through
Detecting system capacitance current over the ground adjusts arc suppression coil XL, and automaton is by detecting the displacement voltage U0 of neutral point
To control earthed switch to disconnect and put into, earthed switch is controlled to disconnect and put into by detecting earthed switch electric current.
Automaton is connected with some line fault alignment systems being arranged in parallel on power system outlet line.
Line fault alignment system be optical fiber temperature-measurement fault location system, optical fiber temperature-measurement fault location system include with it is automatic
The temperature-measuring optical fiber TMOF of control device connection.
When three single-phase earthings switch Ka, Kb, Kc phase mutually different from failure, this kind of protection of failure is by breaker Kz
Quick on-off is realized.Breaker Kz of the invention, when three single-phase earthing switch Ka, Kb, Kc electric currents of any one are more than predetermined
During value, automaton thinks phase fault, then breaker Kz switches are rapid disconnects.
Some temperature-measuring optical fibers are layed in circuit and are in close contact with wire, because temperature-measuring optical fiber possesses electromagnetism interference energy
Power, can under electromagnetic interference environment high normal work, and the impact of high voltage and high current can be resisted, simultaneously because surveying
Span is away from, long lifespan the advantages of, therefore can greatly meet engineering demand.
In distribution network systems, neutral point coordinates three single-phase earthings to switch the shunting of Ka, Kb, Kc through arc suppression coil XL ground connection
Effect, current in the fault point is shifted, and realizes the safe and stable operation of distribution network systems.Present invention utilizes arc suppression coil XL
The characteristics of can compensate for capacitance current, is drawn when system is without neutral point in small current neutral grounding system by grounding transformer JDB
Go out neutral point, neutral point is grounded through arc suppression coil XL, when system occurs intermittent defect, first mended by arc suppression coil XL
Repay, reached the purpose of quick extinguishing electric arc, if ground connection disappears, system recovers normal operation, so as to avoid because of instantaneity
Or the fault spread that intermittent ground connection is triggered.
For permanent fault, differentiate which is specially mutually breaks down, and then starts single-phase connecing by automaton
Ground switch Ka, Kb, Kc grounding shunt function, will Earth Phase by single-phase earthing switch Ka, Kb or Kc ground connection, so as to shift
The electric current of actual fault point, protects fault in-situ, improves reliability and the personal safety of system safety operation.While by
In the compensating action of arc suppression coil XL so that the electric current for flowing through single-phase earthing switch Ka, Kb or Kc is relative without arc suppression coil XL's
The system value of arc extinction compensation significantly reduces, and reduces the electric current that the switching action of single-phase earthing switch Ka, Kb or Kc brings
Impact, therefore processing safety is not only increased, while avoiding the generation of resonance.
The grounding shunt action for switching Ka, Kb, Kc using three single-phase earthings carries out failure line selection, when single-phase earthing switch
When Ka, Kb or Kc disconnect, the zero-sequence current of faulty line is this line current and aftercurrent sum, and non-fault line is itself
The capacitance current of circuit, after Ka, Kb or Kc of single-phase earthing switch are acted, single-phase earthing switchs Ka, Kb or Kc apart from power supply
Nearest impedance is minimum, and residual flow major part can flow to single-phase earthing switch Ka, Kb or Kc, and current in the fault point is substantially reduced, leads to for this
The increment for crossing the front and rear outlet zero-sequence current of Ka, Kb or Kc action of automaton collection single-phase earthing switch differentiates ground wire
Road.
When system occurs earth fault, breaker Kz is to prevent misjudgement phase and corresponding single-phase earthing switch Ka, Kb
Or after Kc carries out shunting action closure, system occurs to cause the two-phase grounding fault to cause grounding transformer JDB when out-phase is grounded again
Or the accident of line switching tripping operation.When there is two-phase grounding fault, the instantaneous over-current protection of breaker Kz can become prior to ground connection
Depressor JDB and ground path fast tripping protection device are acted, tripping circuit breaker Kz, so as to cut off short dot, it is to avoid grounding transformer JDB
Or faulty line trip accident, improve power supply reliability.
Sensing optic cable thermometry is a kind of height for real-time monitoring temperature field for growing up in recent years both at home and abroad
New technology, the optical time domain reflection of Main Basiss temperature-measuring optical fiber TMOF and the Raman Back Scattering temperature effect of temperature-measuring optical fiber TMOF,
Temperature-measuring optical fiber TMOF is radiated region to be measured, can continuously measure/be accurately positioned the temperature of whole piece temperature-measuring optical fiber TMOF local environments,
And malfunction monitoring is carried out with positioning according to the temperature change of environment.
Line fault alignment system is optical fiber temperature-measurement fault location system, and the heating produced using ground connection aftercurrent is drawn
Play the elevated principle of earth point temperature, using the subsidiary temperature-measuring optical fiber TMOF of cable itself or after the temperature-measuring optical fiber TMOF that lays by
Automaton is acquired calculating to circuit each point temperature, differentiates fault point, convenient and swift.
Embodiment 2
The present embodiment is distinguished as with embodiment 1：
Earthed switch is three breaker Kz being independently connected with the triple line of bus, three breaker Kz respectively with automatically control
Device is connected.Using three breakers, it is easy to different applications.
Claims (6)
1. a kind of new arc suppression coil earthing compensation device with grounding shunt function, including grounding transformer JDB and with
The arc suppression coil XL that grounding transformer JDB neutral points are connected and are grounded, it is characterised in that：Also include and each phase of electrical system bus
The earthed switch for connecting and being grounded, earthed switch is arranged in parallel with grounding transformer JDB and arc suppression coil XL, arc suppression coil XL and
Earthed switch with can detect busbar voltage and the automaton of power system capacitive earth current and be connected.
2. the new arc suppression coil earthing compensation device with grounding shunt function according to claim 1, its feature exists
In：Earthed switch includes three single-phase earthing switch JDK and breaker Kz, with open circuit after three single-phase earthing switch JDK parallel connections
Device Kz connects, and three single-phase earthing switch JDK are connected with automaton respectively.
3. the new arc suppression coil earthing compensation device with grounding shunt function according to claim 1, its feature exists
In：Earthed switch is three breaker Kz being independently connected with the triple line of bus, three breaker Kz respectively with automatically control
Device is connected.
4. the new arc suppression coil earthing compensation device with grounding shunt function according to any one of claims 1 to 3,
It is characterized in that：Automaton be connected to grounding transformer JDB neutral points for detecting neutral point displacement voltage U0
Voltage transformer, the sensing for detecting arc suppression coil XL loop currents I0 being arranged on the ground path of arc suppression coil XL
Device, the sensor for detecting earthed switch electric current being arranged on the ground path of earthed switch are connected.
5. the new arc suppression coil earthing compensation device with grounding shunt function according to claim 4, its feature exists
In：Automaton is connected with some line fault alignment systems being arranged in parallel on power system outlet line.
6. the new arc suppression coil earthing compensation device with grounding shunt function according to claim 5, its feature exists
In：Line fault alignment system is optical fiber temperature-measurement fault location system, and optical fiber temperature-measurement fault location system includes and automatically controls
The temperature-measuring optical fiber TMOF of device connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710130176.2A CN106877305A (en) | 2017-03-07 | 2017-03-07 | New arc suppression coil earthing compensation device with grounding shunt function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710130176.2A CN106877305A (en) | 2017-03-07 | 2017-03-07 | New arc suppression coil earthing compensation device with grounding shunt function |
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| CN106877305A true CN106877305A (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710130176.2A Pending CN106877305A (en) | 2017-03-07 | 2017-03-07 | New arc suppression coil earthing compensation device with grounding shunt function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596931A (en) * | 2017-09-30 | 2019-04-09 | 西门子（中国）有限公司 | The fault-line selecting method of system with non effectively earth ed neutral |
| CN110609202A (en) * | 2019-10-14 | 2019-12-24 | 河北旭辉电气股份有限公司 | 10-66kV distribution network intermittent arc light grounding true-mode simulation test device |
| CN111509689A (en) * | 2020-05-11 | 2020-08-07 | 云南电网有限责任公司电力科学研究院 | Ground fault full-compensation system and method for multiplexing parallel reactive compensation |
| CN112310953A (en) * | 2020-11-27 | 2021-02-02 | 芜湖科越电气有限公司 | Overvoltage comprehensive control and arc suppression coil ground fault management system |
| CN112436496A (en) * | 2019-08-26 | 2021-03-02 | 中国石油化工股份有限公司 | Small current grounding arc extinction device and arc extinction method |
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| CN112310953B (en) * | 2020-11-27 | 2022-05-31 | 芜湖科越电气有限公司 | Overvoltage comprehensive control and arc suppression coil ground fault management system |
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Application publication date: 20170620 |