CN106486997A - A kind of Intelligent resonance suppression device - Google Patents
A kind of Intelligent resonance suppression device Download PDFInfo
- Publication number
- CN106486997A CN106486997A CN201610943404.3A CN201610943404A CN106486997A CN 106486997 A CN106486997 A CN 106486997A CN 201610943404 A CN201610943404 A CN 201610943404A CN 106486997 A CN106486997 A CN 106486997A
- Authority
- CN
- China
- Prior art keywords
- vacuum contactor
- sequence current
- resonance
- zero sequence
- multifunctional controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
A kind of Intelligent resonance suppression device, this device is judged by smart circuit, the original paper in major loop mainly has voltage transformer pt, high-voltage one-phase vacuum contactor K, zero sequence current mutual inductor CT, harmonic elimination resistance R, multifunctional controller ZK, PT open delta, signal circuit, communicating terminal.In parallel with harmonic elimination resistance R after individual event vacuum contactor K and zero sequence current mutual inductor CT series connection, then connect with voltage transformer pt；Multifunctional controller ZK passes through signal circuit and individual event vacuum contactor K, zero sequence current mutual inductor CT, PT open delta, communicating terminal connect；During the work of this device, controller device, by dual criterion, is compared analysis, if be resonance or ground connection or other earth fault, and finally transmission instruction is gone out it is ensured that system will not cause adverse consequencess because of erroneous judgement it is ensured that system safety operation.
Description
Technical field
The present invention is a kind of electric protection device, specially a kind of Intelligent resonance suppression device being controlled by circuit.
Background technology
The common system earth mode of China's power system has three kinds：System with effectively earthed neutral；Neutral point is non-effective
Earthed system, neutral by arc extinction coil grounding system.China presses（3-66KV) in system, generally have using neutral point is non-
Effect earthing mode.The advantage of this system is to be that faulted phase voltage raises 3 times of √ and linear voltage not when there is single-phase earthing
Become, therefore abnormal overvoltage can not possibly be produced, but often because voltage transformer saturation causes nonlinear resonance most commonly seen, when sending out
During raw ferro-resonance over-voltage, its value can reach nearly 4 times of phase voltages, and this high-voltage value can involve the whole network, when the persistent period is longer, will
Extremely strong destructiveness, the serious decline of its insulation life are produced to the equipment in electrical network.
Resonance eliminator common in the market has two kinds:Resonance eliminator and secondary resonance eliminator.Wherein one time resonance eliminator is again
It is divided into two kinds：（1）A simple resonance eliminator enters it is simply that directly installing a resistance between voltage transformer neutral point and ground additional
Row harmonic elimination.Although this method energy harmonic elimination, all go here and there in circuit always when system is normally run, when without resonance,
Voltage drift on voltage transformer, the accuracy of impact measurement and metering can be made, also can make route selection during generation single-phase earthing simultaneously
Inaccurate, only just do not affect when resonance occurs.（2）Another kind be voltage transformer neutral point over the ground between install additional
While resistance, a switch in parallel again between voltage transformer and ground, and harmonic elimination resistor coupled in parallel, on the lower end of switch and ground
Between go here and there a zero sequence current mutual inductor, for monitoring when voltage transformer neutral point has resonance potential over the ground, signal is passed
To a controller, issue a command to switch by controller, for the switch between control voltage transformer and ground connection.This method
It has been intended that input harmonic elimination resistance during resonance, put into switch during resonance free, exit harmonic elimination resistance.Although the method will not be in system
In have influence on metering, measurement and route selection.But the drawbacks of the method is only cannot accurately to judge it is resonance from neutral point obtaining current
Or single-phase earthing, because resonance and single-phase earthing all have electric current to occur when occurring, depending merely on zero sequence current mutual inductor provides
Current signal easily cause erroneous judgement.The principle of secondary resonance eliminator be direct short circuit open delta or open delta plus one electricity
Resistance, the ability that this method eliminates resonance is also very limited, is also not easy to distinguish ground connection and resonance..
Content of the invention
It is an object of the invention to provide a kind of Intelligent resonance suppression device, to solve the problems, such as to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme：
A kind of Intelligent resonance suppression device, judges this device by smart circuit, including voltage transformer pt, high-voltage one-phase vacuum contactor K,
Zero sequence current mutual inductor CT, harmonic elimination resistance R, multifunctional controller ZK, PT open delta, signal circuit and communicating terminal, individual event
In parallel with harmonic elimination resistance R after vacuum contactor K and zero sequence current mutual inductor CT series connection, then connect with voltage transformer pt；Many
Function control device ZK passes through signal circuit and individual event vacuum contactor K, zero sequence current mutual inductor CT, PT open delta, communicates eventually
End connects.
As the present invention further technical scheme, multifunctional controller ZK passes through signal circuit and individual event vacuum contact
When device K connects, it is unidirectional to export individual event vacuum contactor K.
As the present invention further technical scheme, multifunctional controller ZK passes through signal circuit and zero sequence current mutual inductance
When device CT connects, it is bi-directionally connected.
As the present invention further technical scheme, multifunctional controller ZK passes through signal circuit and PT open delta connects
When connecing, it is unidirectional to export PT open delta.
As the present invention further technical scheme, multifunctional controller ZK passes through signal circuit and communicating terminal connects
When, it is bi-directionally connected.
Compared with prior art, the present invention utilizes amplitude and the frequency of voltage transformer open delta voltage when resonance occurs
Rate, as a kind of criterion, will flow through when resonance occurs to the ZCT of ground with reference to voltage transformer neutral point simultaneously again
Larger zero-sequence current, this signal code is also sent in multifunctional controller zero sequence current mutual inductor, and controller passes through double
Major punishment evidence, is compared analysis, if be resonance or ground connection or other earth fault, finally send instruction go out it is ensured that
System, because erroneous judgement causes adverse consequencess, allows system safety operation.
Brief description
Fig. 1 is a kind of structural representation of present invention multifunction power instrument.
In figure：1- voltage transformer pt, 2- individual event vacuum contactor K, 3- zero sequence current mutual inductor CT, 4- harmonic elimination resistance R,
5- is multifunctional controller ZK, 6-PT open delta, 7- signal circuit, 8- communicating terminal.
Specific embodiment
With reference to specific embodiment, the technical scheme of this patent is described in more detail.
Refer to Fig. 1, a kind of Intelligent resonance suppression device, this device is judged by smart circuit, the original paper in major loop mainly has and 1 is
Voltage transformer pt, 2 is high-voltage one-phase vacuum contactor K, and 3 is zero sequence current mutual inductor CT, and 4 is harmonic elimination resistance R, and 5 is many work(
Can controller ZK.Principle is the circuit that high-voltage one-phase vacuum contactor is used between disjunction voltage transformer neutral point and ground, is
System is normal when running high-voltage one-phase catalyst in the conduction state it is ensured that being in good between voltage transformer neutral point and ground
Contact condition, can meet metering and the requirement of measurement and route selection.When having resonance in system, catalyst and circuit disconnect, and once disappear
Humorous device is rapidly put in circuit, and the harmonic elimination resistance in multifunctional controller also rises in the secondary circuit of open delta
Effect to harmonic elimination.Simultaneously once a neutral point harmonic elimination circuit breaks down and nor affects on the using effect of secondary resonance eliminator.
The design principle of the present invention is：When system has resonance, multifunctional controller sends instruction single-phase vacuum catalyst
Disconnect with circuit immediately puts into harmonic elimination resistance in circuit simultaneously, simultaneously the harmonic elimination resistance within multifunctional controller also from
Resonance is eliminated, catalyst puts in circuit again when resonance disappears, simultaneously once secondary harmonic elimination at voltage transformer open delta
Resistance also voluntarily disconnects it is ensured that the normal operation of system from circuit simultaneously.
The present invention when resonance occurs by the use of the amplitude of voltage transformer open delta voltage and frequency as a kind of criterion,
With reference to voltage transformer neutral point, larger zero-sequence current will be flow through when resonance occurs to the ZCT of ground simultaneously again,
This signal code is also sent in multifunctional controller zero sequence current mutual inductor, and controller passes through this dual criterion, is compared
Relatively analyze.If being ground signalling from voltage transformer neutral point to the collection of the ZCT of ground, open delta gathers
For resonance signal then controller through judgement after a bill one alarm signal；If from voltage transformer neutral point to ground
ZCT collection for ground signalling, the signal of open delta collection is also ground signalling then controller screen display ground connection
Simultaneously there is alarm signal at interface；If being ground signalling from voltage transformer neutral point to the collection of the ZCT of ground, open
The signal of mouth triangle collection is resonance signal then controller bill one alarm signal；Only when voltage transformer neutral point over the ground
On ZCT collection for resonance signal, the signal of open delta collection is also resonance signal, then controller is directly sent out
Action command is gone out and also has alarm signal to spread out of it is ensured that system, because erroneous judgement causes adverse consequencess, allows system safety operation.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment party
Formula, in the ken that one skilled in the relevant art possesses, can also be on the premise of without departing from this patent objective
Various changes can be made.
Claims (5)
1. a kind of Intelligent resonance suppression device is it is characterised in that include voltage transformer pt（1）, individual event vacuum contactor K（2）, zero-sequence current
Transformer CT（3）, harmonic elimination resistance R（4）, multifunctional controller ZK（5）, PT open delta（6）, signal circuit（7）With communication eventually
End (8), item vacuum contactor K（2）With zero sequence current mutual inductor CT（3）With harmonic elimination resistance R after series connection（4）Parallel connection, then and electric
Pressure transformer PT（1）Connect；Multifunctional controller ZK（5）By signal circuit（7）With individual event vacuum contactor K（2）, zero sequence electricity
Current transformer CT（3）, PT open delta（6）, communicating terminal（8）Connect.
2. a kind of Intelligent resonance suppression device according to claim 1 is it is characterised in that multifunctional controller ZK（5）By signal
Loop（7）With individual event vacuum contactor K（2）During connection, it is unidirectional to export individual event vacuum contactor K（2）.
3. a kind of Intelligent resonance suppression device according to claim 1 is it is characterised in that multifunctional controller ZK（5）By signal
Loop（7）With zero sequence current mutual inductor CT（3）During connection, it is bi-directionally connected.
4. a kind of Intelligent resonance suppression device according to claim 1 is it is characterised in that multifunctional controller ZK（5）By signal
Loop（7）With PT open delta（6）During connection, it is unidirectional to export PT open delta（6）.
5. a kind of Intelligent resonance suppression device according to claim 1 is it is characterised in that multifunctional controller ZK（5）By signal
Loop（7）And communicating terminal（8）During connection, it is bi-directionally connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610943404.3A CN106486997A (en) | 2016-10-26 | 2016-10-26 | A kind of Intelligent resonance suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610943404.3A CN106486997A (en) | 2016-10-26 | 2016-10-26 | A kind of Intelligent resonance suppression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106486997A true CN106486997A (en) | 2017-03-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610943404.3A Pending CN106486997A (en) | 2016-10-26 | 2016-10-26 | A kind of Intelligent resonance suppression device |
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| Country | Link |
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| CN (1) | CN106486997A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097986A (en) * | 2021-03-31 | 2021-07-09 | 国网内蒙古东部电力有限公司电力科学研究院 | Protection method, device and system for primary harmonic elimination device of distribution network voltage transformer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201054497Y (en) * | 2007-06-26 | 2008-04-30 | 孙嘉宁 | Resonance and arc-elimination integrated device for neutral non-valid ground mesh |
| CN202586308U (en) * | 2012-02-08 | 2012-12-05 | 保定浪拜迪电气股份有限公司 | Comprehensive grounding protective device for microcomputer |
| CN203135432U (en) * | 2013-03-25 | 2013-08-14 | 乐清市中容电力补偿设备有限公司 | Arc-resonance extinction route-selecting over-voltage protection device |
| CN103414155A (en) * | 2013-08-21 | 2013-11-27 | 安徽泰隆电气有限公司 | Neutral point installation electronic type rapid harmonic-vibration eliminating device |
| CN103855704A (en) * | 2014-03-28 | 2014-06-11 | 安徽巨森电器有限公司 | Primary and secondary combined resonance elimination device |
| CN205355803U (en) * | 2016-02-03 | 2016-06-29 | 安徽新在线科技股份有限公司 | Full overvoltage suppressing device of antiresonance 4PT |
-
2016
- 2016-10-26 CN CN201610943404.3A patent/CN106486997A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201054497Y (en) * | 2007-06-26 | 2008-04-30 | 孙嘉宁 | Resonance and arc-elimination integrated device for neutral non-valid ground mesh |
| CN202586308U (en) * | 2012-02-08 | 2012-12-05 | 保定浪拜迪电气股份有限公司 | Comprehensive grounding protective device for microcomputer |
| CN203135432U (en) * | 2013-03-25 | 2013-08-14 | 乐清市中容电力补偿设备有限公司 | Arc-resonance extinction route-selecting over-voltage protection device |
| CN103414155A (en) * | 2013-08-21 | 2013-11-27 | 安徽泰隆电气有限公司 | Neutral point installation electronic type rapid harmonic-vibration eliminating device |
| CN103855704A (en) * | 2014-03-28 | 2014-06-11 | 安徽巨森电器有限公司 | Primary and secondary combined resonance elimination device |
| CN205355803U (en) * | 2016-02-03 | 2016-06-29 | 安徽新在线科技股份有限公司 | Full overvoltage suppressing device of antiresonance 4PT |
Non-Patent Citations (1)
| Title |
|---|
| 张鹏程等: "消弧线圈及自动补偿装置的原理和选择", 《山西电力》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097986A (en) * | 2021-03-31 | 2021-07-09 | 国网内蒙古东部电力有限公司电力科学研究院 | Protection method, device and system for primary harmonic elimination device of distribution network voltage transformer |
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Application publication date: 20170308 |
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