CN102593813A - Intelligent comprehensive resonance elimination device - Google Patents
Intelligent comprehensive resonance elimination device Download PDFInfo
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- CN102593813A CN102593813A CN2012100660835A CN201210066083A CN102593813A CN 102593813 A CN102593813 A CN 102593813A CN 2012100660835 A CN2012100660835 A CN 2012100660835A CN 201210066083 A CN201210066083 A CN 201210066083A CN 102593813 A CN102593813 A CN 102593813A
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- 230000008030 elimination Effects 0.000 title claims abstract description 29
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 29
- 230000005611 electricity Effects 0.000 claims description 3
- 230000005350 ferromagnetic resonance Effects 0.000 abstract 2
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- 238000005259 measurement Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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Abstract
The invention discloses an intelligent comprehensive resonance elimination device, which comprises a current sensitive type primary resonance eliminator and a microcomputer secondary resonance eliminator. A current transformer is connected between the current sensitive type primary resonance eliminator and the microcomputer secondary resonance eliminator. According to the microcomputer secondary resonance eliminator, ferromagnetic resonance of frequency division, power frequency and frequency doubling is eliminated, the operation state of the primary resonance eliminator can be constantly monitored, the primary resonance eliminator is composed of current sensitive type resistance elements, the primary resonance eliminator is in a low resistance state during normal operation and is in a high resistance state when potential transformer (PT) resonance occurs, resonance conditions are destroyed, the primary resonance eliminator rapidly changes to be in the high resistance state when PT ferromagnetic resonance occurs so that rapid resonance elimination is achieved, and rapid continuous resonance elimination is achieved, resonance elimination time is shorter when the amplitude of resonance over voltage is higher, and defects existing in voltage sensitive type primary resonance elimination devices are overcome.
Description
Technical field
The present invention relates to the resonance eliminator field, specifically is a kind of intelligent comprehensive harmonic elimination apparatus.
Background technology
The following system of China 35 kV great majority adopt power supply isolated neutral operational mode; Winding of electromagnetic potential transformer becomes isolated neutral electrical network unique metal passage over the ground on its bus, and the electrical network relatively charge and discharge approach of electric capacity must pass through winding of voltage transformer.When system's generation single-phase earthing, capacitance current can be flow through in the fault point, and the voltage that perfects phase is elevated to line voltage, fill on its direct-to-ground capacitance with line voltage corresponding charge.In case earth fault disappears, at this moment current path is cut off, but not ground connection must return to the normal phase voltage levvl by the line voltage instantaneous mutually.But because earth fault is broken off; Non-ground connection is at the electric charge that has charged to during the ground connection under the line voltage; Just have only through voltage transformer high pressure winding; Neutral point through its original ground connection gets into the earth, shoving of several amperes of amplitudes can occur in winding of voltage transformer, with the voltage transformer high-voltage wire iron-melting fusing.In this transient process; Will flow through a low frequency saturation current that amplitude is very high in the voltage transformer high pressure winding, make the voltage transformer iron core seriously saturated, the piezoelectric voltage instrument transformer sensor magnetizing inductance after saturated diminishes; The grid earth impedance is tending towards perception; Just form three-phase or single-phase resonance circuit if the inductance over the ground and the direct-to-ground capacitance of grid are complementary this moment, can excite various ferro-resonance over-voltages.Single-phase arc grounding in the electrical network perfects phase voltage owing to being struck by lightning or other reasons circuit transient earthing, making and rises suddenly in addition, produces very big shoving, and voltage transformer is burnt.
Domestic common way is to install microcomputer resonance eliminator (be called for short secondary harmonic elimination) additional or at resonance eliminator of PT neutral point string (being called for short a time harmonic elimination) at open delta.By monolithic processor controlled microcomputer harmonic elimination apparatus; When resonance took place, the data volume about the about 100ms of frequency discrimination system acquisition (5 cycle) of device went out harmonic components and amplitude through the FFT transform analysis; Correspondingly drop into " harmonic elimination resistance " and absorb resonant energy, eliminate ferro resonance.Aspect elimination resonance, there is hysteresis, long-term use separately can cause damage to voltage transformer.One time resonance eliminator is main with pressure cell (voltage-type) resonance eliminator, and when PT normally moved, the pressure sensitive impedance was very big, influenced the certainty of measurement of PT; When arc grounding short circuit for a long time, the thermal capacity of nonlinear resistance is difficult to satisfy the heat radiation requirement, and thermal breakdown can take place; Because pressure cell is contained in the seal, operation conditions when using for a long time (as aging etc.) can't be monitored constantly.Along with national intelligent grid development need, especially on-line monitoring practices, and above-mentioned technical standard resonance eliminator can not satisfy the production needs.
Summary of the invention
The technical problem that the present invention will solve provides a kind of intelligent comprehensive harmonic elimination apparatus, and resonance eliminator and the two advantage of secondary harmonic elimination dress device are mutually combined, and has complementary advantages, and guarantees that voltage transformer self do not participate in resonance.
Technical scheme of the present invention is:
The intelligent comprehensive harmonic elimination apparatus, it comprises stream resonance eliminator of quick type and microcomputer secondary resonance eliminator, flows between resonance eliminator of quick type and the microcomputer secondary resonance eliminator to be connected with current transformer.
Signal tablet, signal output board and power panel that described microcomputer secondary resonance eliminator comprises microprocessor, is connected with microprocessor.
Described current transformer is built in resonance eliminator of the quick type of stream, flows resonance eliminator of quick type and is provided with the electric current delivery outlet, and microcomputer secondary resonance eliminator is provided with the electric current input port, and described electric current delivery outlet is connected with the electric current input port.
Described signal tablet is provided with voltage transformer three-phase voltage and opening voltage interface, and the signal output board is provided with remote alarm interface.
Described remote alarm interface comprises undervoltage warning interface, over voltage alarm interface, resonance remote alarm interface, dead electricity remote alarm interface and fault alarm interface.
Advantage of the present invention:
Microcomputer secondary resonance eliminator of the present invention can be eliminated frequency division, power frequency, frequency multiplication ferro resonance, can monitor the resonance eliminator running status constantly one time; One time resonance eliminator is made up of the quick type element of stream, is low resistive state when normally moving, and when resonance takes place PT (voltage transformer), is high-impedance state; Destroyed condition of resonance; Be high resistant fast when the PT ferro resonance takes place and realize quick harmonic elimination, can realize continuously harmonic elimination fast, the resonance overvoltage amplitude is big more; The harmonic elimination time is short more, has overcome the shortcoming that harmonic elimination apparatus of pressure sensitive exists.
Description of drawings
Fig. 1 is a structured flowchart of the present invention.
Fig. 2 is the terminal connection diagram of microcomputer secondary resonance eliminator of the present invention.
Embodiment
See Fig. 1; The intelligent comprehensive harmonic elimination apparatus; It comprises resonance eliminator of the quick type of the stream that is built-in with current transformer 1 and microcomputer secondary resonance eliminator 2; Microcomputer secondary resonance eliminator 2 comprises microprocessor 3, the signal tablet 4 that is connected with microprocessor 3, signal output board and power panel 5, and the electric current input port terminal CT1 that flows on the signal tablet 4 of electric current delivery outlet and microcomputer secondary resonance eliminator 2 of a resonance eliminator 1 of quick type is connected with the CT2 (see figure 2);
See Fig. 2; Signal tablet 4 is provided with voltage transformer three-phase voltage and opening voltage interface terminal TVa-a, TVb-a, TVc-a and TVa-da; Signal output board and power panel 5 are provided with remote alarm interface, and remote alarm interface comprises undervoltage warning Interface Terminal 1 and 2, over voltage alarm Interface Terminal 3 and 4, resonance remote alarm interface terminal 5 and 6, dead electricity remote alarm interface terminal 7 and 8, fault alarm Interface Terminal 9 and 10.
When the present invention uses; The voltage transformer three-phase voltage that flows resonance eliminator 1 of quick type and microcomputer secondary resonance eliminator 2 all is connected with voltage transformer with the opening voltage interface; If the PT ferro resonance takes place, flow resonance eliminator 1 of quick type prior to microcomputer secondary resonance eliminator 2, bring into play the effect that promptly disappears.It is the ferro resonance of certain frequency that microcomputer secondary resonance eliminator 2 detects, and starts secondary harmonic elimination element, sends warning, shows and store automatically related data.Meanwhile, microcomputer secondary resonance eliminator 2 detect flow through a resonance eliminator 1 of quick type current value whether in normal range (NR), judge whether a harmonic elimination is in normal condition, and the information of a harmonic elimination stored, exported.
Claims (5)
1. intelligent comprehensive harmonic elimination apparatus is characterized in that: it comprises stream resonance eliminator of quick type and microcomputer secondary resonance eliminator, flows between resonance eliminator of quick type and the microcomputer secondary resonance eliminator to be connected with current transformer.
2. intelligent comprehensive harmonic elimination apparatus according to claim 1 is characterized in that: signal tablet, signal output board and power panel that described microcomputer secondary resonance eliminator comprises microprocessor, is connected with microprocessor.
3. intelligent comprehensive harmonic elimination apparatus according to claim 1; It is characterized in that: described current transformer is built in resonance eliminator of the quick type of stream; Flow resonance eliminator of quick type and be provided with the electric current delivery outlet; Microcomputer secondary resonance eliminator is provided with the electric current input port, and described electric current delivery outlet is connected with the electric current input port.
4. intelligent comprehensive harmonic elimination apparatus according to claim 2 is characterized in that: described signal tablet is provided with voltage transformer three-phase voltage and opening voltage interface, and the signal output board is provided with remote alarm interface.
5. intelligent comprehensive harmonic elimination apparatus according to claim 4 is characterized in that: described remote alarm interface comprises undervoltage warning interface, over voltage alarm interface, resonance remote alarm interface, dead electricity remote alarm interface and fault alarm interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100660835A CN102593813A (en) | 2012-03-14 | 2012-03-14 | Intelligent comprehensive resonance elimination device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100660835A CN102593813A (en) | 2012-03-14 | 2012-03-14 | Intelligent comprehensive resonance elimination device |
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| CN102593813A true CN102593813A (en) | 2012-07-18 |
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| CN2012100660835A Pending CN102593813A (en) | 2012-03-14 | 2012-03-14 | Intelligent comprehensive resonance elimination device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208024A (en) * | 2016-09-13 | 2016-12-07 | 国家电网公司 | A kind of elimination resonance overvoltage device being based on the monitoring quick element state of stream |
| CN108614174A (en) * | 2018-06-11 | 2018-10-02 | 国网湖北省电力有限公司孝感供电公司 | The tester and test system of secondary resonance elimination device |
| CN110198036A (en) * | 2019-06-14 | 2019-09-03 | 国网新疆电力有限公司喀什供电公司 | A kind of comprehensive harmonic elimination apparatus and its harmonic elimination method |
Citations (5)
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| CN101009429A (en) * | 2006-01-16 | 2007-08-01 | 林苏 | Harmony and arc elimination method of the neutral point non-valid grounding power grid and its integrated protection device |
| CN101071145A (en) * | 2007-06-14 | 2007-11-14 | 思源电气股份有限公司 | Method for measuring capacitance current of automatic tracking compensating device for arc-extinguishing coil |
| CN101132131A (en) * | 2006-08-23 | 2008-02-27 | 浙江广天变压器有限公司 | Inductance regulation type self-tuning arc-extinguishing pressure-limiting device |
| US20080272911A1 (en) * | 2007-05-03 | 2008-11-06 | Novar Gmbh | Hazard Indicator with LED |
| CN202455061U (en) * | 2012-03-14 | 2012-09-26 | 安徽正广电电力技术有限公司 | Intelligent comprehensive resonance elimination device |
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2012
- 2012-03-14 CN CN2012100660835A patent/CN102593813A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101009429A (en) * | 2006-01-16 | 2007-08-01 | 林苏 | Harmony and arc elimination method of the neutral point non-valid grounding power grid and its integrated protection device |
| CN101132131A (en) * | 2006-08-23 | 2008-02-27 | 浙江广天变压器有限公司 | Inductance regulation type self-tuning arc-extinguishing pressure-limiting device |
| US20080272911A1 (en) * | 2007-05-03 | 2008-11-06 | Novar Gmbh | Hazard Indicator with LED |
| CN101071145A (en) * | 2007-06-14 | 2007-11-14 | 思源电气股份有限公司 | Method for measuring capacitance current of automatic tracking compensating device for arc-extinguishing coil |
| CN202455061U (en) * | 2012-03-14 | 2012-09-26 | 安徽正广电电力技术有限公司 | Intelligent comprehensive resonance elimination device |
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| Title |
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| 吴旭涛等: "热敏电阻型一次限流消谐器的研究及应用", 《宁夏电力》, no. 6, 28 December 2008 (2008-12-28), pages 35 - 38 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208024A (en) * | 2016-09-13 | 2016-12-07 | 国家电网公司 | A kind of elimination resonance overvoltage device being based on the monitoring quick element state of stream |
| CN106208024B (en) * | 2016-09-13 | 2017-12-26 | 国家电网公司 | A kind of elimination resonance overvoltage device for being based on monitoring and flowing quick element state |
| CN108614174A (en) * | 2018-06-11 | 2018-10-02 | 国网湖北省电力有限公司孝感供电公司 | The tester and test system of secondary resonance elimination device |
| CN110198036A (en) * | 2019-06-14 | 2019-09-03 | 国网新疆电力有限公司喀什供电公司 | A kind of comprehensive harmonic elimination apparatus and its harmonic elimination method |
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Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: ANHUI ZGD ELECTRIC POWER TECHNOLOGY CO., LTD. Effective date: 20131127 Owner name: STATE GRID SINKIANG BAZHOU POWER SUPPLY CO., LTD. Effective date: 20131127 |
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Application publication date: 20120718 |