CN202455061U - Intelligent comprehensive resonance elimination device - Google Patents
Intelligent comprehensive resonance elimination device Download PDFInfo
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- CN202455061U CN202455061U CN201220094256XU CN201220094256U CN202455061U CN 202455061 U CN202455061 U CN 202455061U CN 201220094256X U CN201220094256X U CN 201220094256XU CN 201220094256 U CN201220094256 U CN 201220094256U CN 202455061 U CN202455061 U CN 202455061U
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- resonance
- eliminator
- resonance eliminator
- intelligent comprehensive
- harmonic elimination
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- 230000008030 elimination Effects 0.000 title claims abstract description 31
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 31
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000005350 ferromagnetic resonance Effects 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 230000008447 perception Effects 0.000 description 1
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Abstract
The utility model discloses an intelligent comprehensive resonance elimination device. The intelligent comprehensive resonance elimination device comprises a flow-sensitive primary resonance eliminator and a microcomputer secondary resonance eliminator, wherein a current transformer is connected between the flow-sensitive primary resonance eliminator and the microcomputer secondary resonance eliminator. The secondary resonance eliminator of the intelligent comprehensive resonance elimination device disclosed by the utility model can be used for eliminating the frequency division, power frequency and frequency multiplication ferromagnetic resonance and always monitoring the operation state of the primary resonance eliminator; the primary resonance eliminator comprises a flow-sensitive resistance element which is at a low-resistance state during normal operation and is at a high-resistance state when resonance occurs in a PT (potential transformer), then resonance conditions can be damaged, and when the ferromagnetic resonance occurs in the PT, the flow-sensitive resistance element shows high resistance and can realize fast resonance elimination and realize continuous and fast resonance elimination; and the larger the resonance overvoltage amplitude, the shorter the resonance elimination time, and the defects of a pressure-sensitive primary resonance elimination device can be further overcome.
Description
Technical field
The utility model 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.
The utility model content
The technical problem that the utility model 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.
The technical scheme of the utility model 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.
The advantage of the utility model:
The utility model microcomputer secondary resonance eliminator 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 the structured flowchart of the utility model.
Fig. 2 is the terminal connection diagram of the utility model microcomputer secondary resonance eliminator.
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 utility model 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 |
|---|---|---|---|
| CN201220094256XU CN202455061U (en) | 2012-03-14 | 2012-03-14 | Intelligent comprehensive resonance elimination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220094256XU CN202455061U (en) | 2012-03-14 | 2012-03-14 | Intelligent comprehensive resonance elimination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202455061U true CN202455061U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220094256XU Expired - Lifetime CN202455061U (en) | 2012-03-14 | 2012-03-14 | Intelligent comprehensive resonance elimination device |
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| Country | Link |
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| CN (1) | CN202455061U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593813A (en) * | 2012-03-14 | 2012-07-18 | 安徽正广电电力技术有限公司 | Intelligent comprehensive resonance elimination device |
| CN107332220A (en) * | 2017-08-29 | 2017-11-07 | 安徽三和电力技术有限公司 | For microcomputer harmonic elimination device control system |
| CN117728369A (en) * | 2024-02-18 | 2024-03-19 | 国网安徽省电力有限公司电力科学研究院 | Electromagnetic voltage transformer overvoltage suppression assembly based on PTC |
-
2012
- 2012-03-14 CN CN201220094256XU patent/CN202455061U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593813A (en) * | 2012-03-14 | 2012-07-18 | 安徽正广电电力技术有限公司 | Intelligent comprehensive resonance elimination device |
| CN107332220A (en) * | 2017-08-29 | 2017-11-07 | 安徽三和电力技术有限公司 | For microcomputer harmonic elimination device control system |
| CN117728369A (en) * | 2024-02-18 | 2024-03-19 | 国网安徽省电力有限公司电力科学研究院 | Electromagnetic voltage transformer overvoltage suppression assembly based on PTC |
| CN117728369B (en) * | 2024-02-18 | 2024-05-10 | 国网安徽省电力有限公司电力科学研究院 | Electromagnetic voltage transformer overvoltage suppression assembly based on PTC |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131203 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: STATE GRID XINJIANG BAZHOU POWER SUPPLY CO., LTD. Address before: 230088 No. 28 Acacia Road, hi tech Zone, Anhui, Hefei Patentee before: Anhui Zhengguangdian Electric Technologies Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
|
| CX01 | Expiry of patent term |