CN101813731A - Method for judging running state of external arrester of transformer balancing winding - Google Patents
Method for judging running state of external arrester of transformer balancing winding Download PDFInfo
- Publication number
- CN101813731A CN101813731A CN201010156146.7A CN201010156146A CN101813731A CN 101813731 A CN101813731 A CN 101813731A CN 201010156146 A CN201010156146 A CN 201010156146A CN 101813731 A CN101813731 A CN 101813731A
- Authority
- CN
- China
- Prior art keywords
- voltage
- arrester
- phase
- running state
- transformer
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 230000001012 protector Effects 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a method for judging the running state of an external arrester of a transformer balancing winding, in the technical scheme, a voltage transducer is in bridge connection with the two ends of an arbitrary phase of a three-phase arrester, and the running state of the three-phase arrester is judged by monitoring the voltage of the two ends of the voltage transducer. The invention has the characteristics of stable and accurate output signal, strong antijamming capability, low loss, no influence of environmental factors and the like, 4-20mA standard current output provides convenience for an industrial personal computer to acquire signals on site, and thereby the possibility of remotely monitoring the running state of the arrester can be realized, and the antijamming capability of the system and the data accuracy are improved.
Description
Technical field
The present invention relates to the voltage transmission technical field, specifically a kind of determination methods of running state of external arrester of transformer balancing winding.
Background technology
Moving a large amount of high voltage electric equipments in electric system, the security of its power transformer is directly connected to the safe operation of electrical network.Power transformer balance winding is also referred to as stablizes the winding or the tertiary winding, is that a kind of auxiliary triangle connects winding.In the full Y-connection transformer of isolated neutral, the balance winding is used for providing the loop for the third-harmonic component in zero-sequence current and the exciting current.During power transformer balance winding external arrester operate as normal, can effectively reduce the balance winding the various superpotential that may meet with, for the transformer safe operation provides safeguard.Yet, the oxide lightning arrester is owing to reasons such as valve block is aging, electric property degenerates usually cause various faults, and explosion accident also happens occasionally, in case lightning arrester breaks down, just may cause the major accident of transformer short-circuit operation, threaten the safe operation of electric system.
At present, many lightning arrester monitors manufacturer has released relevant monitoring product one after another, but the principle of work of its product all is to realize by the leakage current of monitoring lightning arrester.Lightning arrester leakage current during operate as normal under good running environment is about 0.1～0.25mA.Except can causing owing to inner reason itself leakage current of an arrester increases, when overcast and rainy or external insulation pollution degree was higher, leakage current of an arrester also can increase by tens times, and temperature also produces certain influence to the size of leakage current of an arrester.To a this fruit many because of phenomenon, be difficult to whether to exist internal fault to make accurate judgement to lightning arrester according to the variation of leakage current.Though some producer has adopted the technology of the inside and outside leakage current of lightning arrester being carried out analyzing and processing, in the hope of avoiding the influence of atmospheric conditions, but because residing running environment of transformer and weather conditions change greatly, the state determine effect is not satisfactory, utilizes the mode of monitoring leakage electric current to analyze the lightning arrester running status and still has certain uncertainty.
Summary of the invention
For solving the technical matters of above-mentioned existence, the invention provides a kind of determination methods of running state of external arrester of transformer balancing winding, abandoned by the monitoring leakage current of an arrester and carried out the classic method that state is judged, integrated use technology such as transformation technology, electromagnetic isolation, judged result is not subjected to the influence of running environment state and voltage fluctuation.
For achieving the above object, the technical solution used in the present invention is as follows:
Voltage transmitter is connected across the two ends of any phase of three-phase lightning protector, judges the running status of three-phase lightning protector by the voltage at monitoring voltage transmitter two ends, concrete state is judged as follows:
(1) when the voltage transmitter both end voltage be transformer balance winding wire voltage
Times the time, the three-phase lightning protector operational excellence;
(2) when the voltage transmitter both end voltage is 0, a connected phase lightning arrester damages;
(3) when the voltage transmitter both end voltage is the line voltage of transformer balance winding, one in the two-phase lightning arrester damages mutually in addition.
Monitoring result of the present invention is not subjected to the influence of running environment pollution level and voltage fluctuation, thereby guarantees accurately, in time pinpoints the problems, and gets rid of the lightning arrester fault in the very first time, for the safe operation of power transformer provides reliable guarantee; The voltage transmitter compact conformation, the volume that are adopted are little, in light weight, utilize the voltage transmission technology to realize the isolation and the conversion of electric weight, have stable output signal, accurately, antijamming capability is strong, loss is low, be not subjected to characteristics such as such environmental effects, the normalized current of 4～20mA is output as industrial computer collection in worksite signal and provides convenient, and then make and the lightning arrester running status is carried out remote monitoring become possibility, and improved the degree of accuracy of system's antijamming capability and data.
Description of drawings
Accompanying drawing is a principle schematic of the present invention.
Embodiment:
Describe the present invention below in conjunction with the drawings and specific embodiments:
It is the voltage transmitter of RMPT-20/10.5 that voltage transmitter in the present embodiment adopts the model of being developed for the inventive method specially by Shandong Taikai Transformer Co., Ltd..
The action principle of voltage transmitter is the alternating voltage step-down once more with a transformation, the current signal of output 4～20mA after electromagnetic isolation, rectification, signal amplify, low voltage voltage and data acquisition system (DAS) through conversion are isolated fully, avoid system to be subjected to the interference of strong signal, thereby improve the reliability of system.
By the on-line monitoring of voltage transmitter realization to external arrester of transformer balancing winding, at first to solve the technology realization that high-voltage variable is changed to low-voltage, comprise that needs consider parameters such as the dielectric level of dropping equipment, accuracy rating, low-voltage output institute bringing onto load size.Because it is on-the-spot to be applied to different open-air operations, also to consider factors such as gradation for surface pollution, sea level elevation, environment temperature during the dropping equipment design.Because the limitation of installation site, dropping equipment will accomplish as far as possible that volume is little, in light weight, profile is exquisite attractive in appearance, and this just need take all factors into consideration the relation between the parameters such as no-load voltage ratio, accuracy rating of dropping equipment.Next is to solve the technical matters that low voltage signal is transformed to 4～20mA industrial standard current signal, because the restriction of structural requirement, the secondary voltage of dropping equipment can not be too low.
For solving the technical matters of high-voltage variable being changed to low-voltage, voltage transmitter among the present invention adopts insulating property good insulation material and high performance siliconized plate, under the condition that guaranteed performance requires, produce that compact conformation, volume are little, in light weight, good looking appearance, the low dropping equipment of loss.This dropping equipment technical parameter is as follows:
Rated insulation level: 12/42/75kV;
Gradation for surface pollution: IV level;
Accuracy rating: 10P;
Sea level elevation: 1000m;
Environment temperature :-40～+ 55 ℃.
Transformer balance winding is generally delta connection, and each terminal is drawn with sleeve pipe, and passes through arrester ground, as shown in drawings, being example at b phase lightning arrester two ends cross-over connection voltage transmitter, during the lightning arrester operate as normal, voltage-to-ground that Pa, Pb, Pc are 3 is balance winding wire voltage
Doubly, the voltage at voltage transmitter two ends also is balance winding wire voltage
Doubly; When being short-circuited fault when the damage of b phase lightning arrester, the voltage transmitter both end voltage will reduce to zero; And when a mutually or c phase lightning arrester damage when being short-circuited fault, the voltage at voltage transmitter two ends will rise to balance winding wire voltage.As long as,, just can make judgement to the operation conditions of three-phase lightning protector according to the situation of change of voltage transmitter both end voltage at arbitrary phase lightning arrester two ends cross-over connection voltage transmitter of balance winding.
Therefore, to be example at b phase lightning arrester two ends cross-over connection voltage transmitter, the determination methods of running state of external arrester of transformer balancing winding provided by the invention is specific as follows:
When the voltage transmitter both end voltage is a balance winding wire voltage
Times the time, the three-phase lightning protector operational excellence;
When the voltage transmitter both end voltage was 0, b phase lightning arrester damaged;
When the voltage transmitter both end voltage was the line voltage of balance winding, one in a phase or the c phase lightning arrester damaged mutually.
According to judged result, in time change the fault lightning arrester, avoid because two-phase is damaged the transformer short-circuit accident that causes simultaneously.
Claims (1)
1. the determination methods of a running state of external arrester of transformer balancing winding, it is characterized in that, voltage transmitter is connected across the two ends of any phase of three-phase lightning protector, judges the running status of three-phase lightning protector by the voltage at monitoring voltage transmitter two ends, concrete state is judged as follows:
(1) when the voltage transmitter both end voltage be transformer balance winding wire voltage
Times the time, the three-phase lightning protector operational excellence;
(2) when the voltage transmitter both end voltage is 0, a connected phase lightning arrester damages;
(3) when the voltage transmitter both end voltage is the line voltage of transformer balance winding, one in the two-phase lightning arrester damages mutually in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010156146.7A CN101813731B (en) | 2010-04-20 | 2010-04-20 | Method for judging running state of external arrester of transformer balancing winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010156146.7A CN101813731B (en) | 2010-04-20 | 2010-04-20 | Method for judging running state of external arrester of transformer balancing winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101813731A true CN101813731A (en) | 2010-08-25 |
| CN101813731B CN101813731B (en) | 2011-10-19 |
Family
ID=42621038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010156146.7A Expired - Fee Related CN101813731B (en) | 2010-04-20 | 2010-04-20 | Method for judging running state of external arrester of transformer balancing winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101813731B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103617875A (en) * | 2013-11-27 | 2014-03-05 | 特变电工衡阳变压器有限公司 | Method for restraining neutral point electric potential drifting of low-voltage winding |
| CN106771821A (en) * | 2017-01-11 | 2017-05-31 | 长沙群瑞电子科技有限公司 | A kind of leakage current of an arrester turns 4 20mA signaling conversion circuits |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266191A (en) * | 2000-01-14 | 2000-09-13 | 宜兴市供电局 | Method and apparatus for on-line testing lightning arrester |
| CN2594803Y (en) * | 2002-12-11 | 2003-12-24 | 武汉恒安电气有限责任公司 | Extending board tray for testing electric circuit boards |
| CN1564002A (en) * | 2004-04-06 | 2005-01-12 | 常州市武进恒昌机械厂 | On-line monitor of lighting arrester |
| CN2775668Y (en) * | 2004-04-02 | 2006-04-26 | 武汉大学 | Self detecting integrated metal oxide lightning arrestor |
| CN101533042A (en) * | 2009-04-10 | 2009-09-16 | 祝铭 | Method for monitoring resistive current of non-voltage reference quantity detection lightning arrester |
| CN101533041A (en) * | 2009-04-10 | 2009-09-16 | 李新育 | Method for online separately detecting resistive leakage current of non-voltage reference source |
| CN201378181Y (en) * | 2009-04-10 | 2010-01-06 | 董慈航 | Monitor for detecting resistive current of arrester without voltage reference volume |
-
2010
- 2010-04-20 CN CN201010156146.7A patent/CN101813731B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266191A (en) * | 2000-01-14 | 2000-09-13 | 宜兴市供电局 | Method and apparatus for on-line testing lightning arrester |
| CN2594803Y (en) * | 2002-12-11 | 2003-12-24 | 武汉恒安电气有限责任公司 | Extending board tray for testing electric circuit boards |
| CN2775668Y (en) * | 2004-04-02 | 2006-04-26 | 武汉大学 | Self detecting integrated metal oxide lightning arrestor |
| CN1564002A (en) * | 2004-04-06 | 2005-01-12 | 常州市武进恒昌机械厂 | On-line monitor of lighting arrester |
| CN101533042A (en) * | 2009-04-10 | 2009-09-16 | 祝铭 | Method for monitoring resistive current of non-voltage reference quantity detection lightning arrester |
| CN101533041A (en) * | 2009-04-10 | 2009-09-16 | 李新育 | Method for online separately detecting resistive leakage current of non-voltage reference source |
| CN201378181Y (en) * | 2009-04-10 | 2010-01-06 | 董慈航 | Monitor for detecting resistive current of arrester without voltage reference volume |
Non-Patent Citations (4)
| Title |
|---|
| 《内蒙古电力技术》 19991231 安中全等 配置于自耦变压器运行系统中的金属氧化物避雷器阻性电流的一种测试方法 第15－16页 1 第17卷, 第6期 2 * |
| 《江苏电机工程》 20090930 陈靖 金属氧化物避雷器在线测试方法改进 第49－51页 1 第28卷, 第5期 2 * |
| 《电机与控制学报》 20100228 陈庆国等 基于CPRS的氧化锌避雷器状态监测系统 第99－102页 1 第14卷, 第2期 2 * |
| 《高电压技术》 20020630 殷雄开等 金属氧化物避雷器检测方法的现状与发展 第34－36页 1 第28卷, 第6期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103617875A (en) * | 2013-11-27 | 2014-03-05 | 特变电工衡阳变压器有限公司 | Method for restraining neutral point electric potential drifting of low-voltage winding |
| CN106771821A (en) * | 2017-01-11 | 2017-05-31 | 长沙群瑞电子科技有限公司 | A kind of leakage current of an arrester turns 4 20mA signaling conversion circuits |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101813731B (en) | 2011-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104659797A (en) | Intelligent power load three-phase unbalance handling method at distribution network low voltage side | |
| CN113515838B (en) | DC system modeling simulation method, device, computer equipment and storage medium | |
| Valverde et al. | Ferroresonant configurations in power systems | |
| CN103633629A (en) | High-voltage direct current power transmission line protection method based on wavelet transformation and energy spectrum analysis | |
| CN101673933A (en) | Protection device of power supply line disconnection fault | |
| CN101813731B (en) | Method for judging running state of external arrester of transformer balancing winding | |
| CN108181500B (en) | Method for determining non-pressure fixed value of switching-on of power transmission and transformation equipment | |
| CN204669085U (en) | A kind of control type power distribution circuit breakers far away | |
| CN204067890U (en) | Change low-pressure line-outgoing control cubicle for two yuan | |
| CN204216583U (en) | Based on the colliery compensation arrangement of voltage-source type arc-suppression coil with magnetic bias | |
| CN201892718U (en) | Discharge type cable fault detection device | |
| CN103779836A (en) | Transformer winding fault relay protection method based on ring current mutation feature | |
| CN104749453A (en) | Method for reducing influences imposed on user voltage sag by external grid single-phase grounding fault | |
| CN201282328Y (en) | Motor protector with single-phase grounding protection | |
| CN205069357U (en) | Self -power computer current transformer for protection device | |
| RU2710023C2 (en) | Method for protection of power transformer of ac traction substations from internal damages | |
| CN204177898U (en) | A kind of transformer near region short-circuit signal monitoring device | |
| CN109428502B (en) | Power taking device and method for cable sheath grounding system | |
| CN204407874U (en) | Network-type is mining, and height opens integrated protection and monitoring device | |
| Zhang et al. | A non-unit line protection scheme for MMC-MTDC grids based on aerial-mode voltage traveling waves | |
| CN104682358A (en) | Adaptive tripping method for low current grounded faults | |
| CN201797303U (en) | Motor protection circuit | |
| CN211014594U (en) | Low-voltage transmission line electric leakage information alarm device | |
| CN110703014B (en) | Capacitor monitoring method based on open delta voltage | |
| Xue et al. | Research scheme of self-excitation over-voltage in UHV long transmission lines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20150420 |
|
| EXPY | Termination of patent right or utility model |