CN102914674A - Method for selecting insulation clearance distance required by impulse voltage generator - Google Patents
Method for selecting insulation clearance distance required by impulse voltage generator Download PDFInfo
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- CN102914674A CN102914674A CN2012103792484A CN201210379248A CN102914674A CN 102914674 A CN102914674 A CN 102914674A CN 2012103792484 A CN2012103792484 A CN 2012103792484A CN 201210379248 A CN201210379248 A CN 201210379248A CN 102914674 A CN102914674 A CN 102914674A
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Abstract
The invention provides a method for selecting insulation clearance distance required by an impulse voltage generator. The method includes the following steps of firstly, determining nominal voltage UN of testing equipment according to test data; secondly, performing discharge tests to obtain a discharge voltage and distance relation curve; and thirdly, determining required insulation clearance distance according to the test curve. The method for selecting insulation clearance distance applicable to impact voltage generators different in specification parameters is provided by completely considering conditions such as test voltage of tested equipment, different margin coefficients and curves of different types of electrode discharging characteristics, and can provide reference for on-site mounting and positioning of impact testing equipment in labs.
Description
Technical field
The present invention relates to the system of selection of the required insulation clearance of a kind of impulse voltage generator, be a kind of minimum insulation that considers the conditions such as tested device trial voltage, different nargin coefficient, different type electrodes discharge characteristic curve apart from system of selection, can be the on-the-spot location of installing of different size parameter impulse voltage generator reference frame be provided.
Background technology
Along with development super, the extra-high voltage electric transmission and transformation engineering, impulse voltage generator has become each High-Voltage Experimentation chamber and has carried out one of thunder and lightning, switching impulse test visual plant.Its voltage and capacity promote with voltage class of electric power system and improve constantly, and thousands of kilovolts of impulse voltage generators are very general at home and abroad.Because impulse voltage generator voltage is higher, its insulation clearance of choose reasonable how, normally use simultaneously at assurance equipment, do not cause because the insulation distance shortcoming causes surroundings wall, grounding body paradoxical discharge phenomenon are occured, become the major issue that newly-built laboratory must be considered.
At present, situation about because clearance is inadequate peripheral object discharge being occured when existing the laboratory impulse voltage generator to use, cause a lot of high-voltage tests normally to carry out, reduced to a certain extent the service efficiency of impulse voltage generator, cause the device resource waste, situation is serious, the serious consequence that will cause the engineering project progress to lag behind.Simultaneously, the newly-built laboratory that has blindly increases insulation distance in order to stop insulation distance, causes laboratory construction cost significantly to promote, and design proposal is difficult to by examination.Therefore, the present invention proposes a kind of different size parameter impulse voltage generator insulation clear space that is applicable to apart from the method for selecting considering under the conditions such as tested device trial voltage, different nargin coefficient, different type electrodes discharge characteristic curve.
The at present domestic pertinent literature report that also is not applicable to the system of selection of the required insulation clearance of impulse voltage generator.In view of this, be necessary to provide the system of selection of the required insulation clearance of a kind of impulse voltage generator, to address the above problem.
Summary of the invention
The objective of the invention is to propose a kind of impulse voltage generator that considers under the conditions such as tested device trial voltage, different nargin coefficient, different type electrodes discharge characteristic curve and insulate clear space apart from system of selection, for laboratory testing rig the location is installed reference frame is provided.
Technical scheme of the present invention is: the system of selection of the required insulation clearance of a kind of impulse voltage generator, it is characterized in that, and may further comprise the steps:
1) according to the rated voltage of test figure confirmed test equipment
U N:
Require to determine impulse test voltage according to the test type of carrying out, test standard
U W, the impact test equipment rated voltage
U NFor:
U N=
K 1·
K 2·
K 3·
U W
Wherein,
K 1Be insulation research nargin coefficient;
K 2Be the insulation margin coefficient of testing equipment own;
K 3For big capacity load causes the correction factor that plant efficiency reduces;
2) carry out discharge test and obtain sparking voltage and distance relation curve:
Select grading ring, two kinds of typical electrode of wire that the simulation steel tower is carried out respectively standard thunder and lightning, switching impulse discharge, in the research interstice coverage, utilizing impulse voltage generator to produce the wavefront time is 1.2 μ s, half peak value time was that standard lightning wave and the wavefront time of 50 μ s is 250 μ s, half peak value time was the standard operation ripple of 2500 μ s, lifting and lowering method pressurization program is adopted in test, after being the gap tolerance, constantly raise trial voltage step by step until the discharge generation, reduce afterwards trial voltage, if still discharge continues to reduce trial voltage; The trial voltage if the gap tolerance then raises, repeat above process, lightning impulse test and switching impulse discharge test are all carried out repeatedly impulsive discharge, can obtain 50% probability sparking voltage of lightning impulse and switching impulse according to the test figure statistics, each Test Point Data match can be plotted discharge characteristic curve;
3) determine necessary insulation clearance according to trial curve:
According to the corresponding different voltages of impulse voltage generator each point height, can find respectively corresponding clearance distance, take each point as the center of circle, corresponding clearance distance is that radius is made circular arc, can obtain corresponding arc envelope line, thereby draws the edge line of apparatus insulated distance.
The invention has the beneficial effects as follows: this method is to consider a kind of different size parameter impulse voltage generator that is applicable to that proposes under the conditions such as tested device trial voltage, different nargin coefficient, different type electrodes discharge characteristic curve to insulate clear space apart from system of selection, can the location be installed for the laboratory impact test equipment is on-the-spot reference is provided.
Description of drawings
Fig. 1-Figure 4 shows that by carry out the impulsive discharge test in extra-high voltage open field test field selects grading ring, 2 kinds of different type electrodes of wire to carry out standard thunder and lightning, switching impulse test, each test product impulsive discharge test findings, wherein:
Fig. 1 is that analog conducting wire is to steel tower framework lightning impulse test result.
Fig. 2 is that grading ring is to steel tower framework lightning impulse test result.
Fig. 3 is that analog conducting wire is to steel tower framework switching impulse test result.
Fig. 4 is that grading ring is to steel tower framework switching impulse test result.
Fig. 5-Figure 6 shows that and determine impulse voltage generator insulation clearance method synoptic diagram, wherein Fig. 5 is front elevation, Fig. 6 is vertical view.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
Symbol description in the accompanying drawing (Fig. 5, Fig. 6): 1-impulse voltage generator; The 2-wall; The 3-grading ring; 4-ground;
d mThe longest clearance distance of-equipment peak place rated voltage correspondence; H-impulse voltage generator height;
h-melt pit height; φ-impulse voltage generator external diameter.
The system of selection of the required insulation clearance of a kind of impulse voltage generator of the present invention may further comprise the steps:
1) according to the rated voltage of test figure confirmed test equipment
U N:
Require to determine impulse test voltage according to the test type of carrying out, test standard
U W, the impact test equipment rated voltage
U NFor:
U N=
K 1·
K 2·
K 3·
U W
Wherein,
K 1Be insulation research nargin coefficient;
K 2Be the insulation margin coefficient of testing equipment own;
K 3For big capacity load causes the correction factor that plant efficiency reduces;
2) carry out discharge test and obtain sparking voltage and distance relation curve:
Select grading ring, two kinds of typical electrode of wire that the simulation steel tower is carried out respectively standard thunder and lightning, switching impulse discharge, in the research interstice coverage, utilizing impulse voltage generator to produce the wavefront time is 1.2 μ s, half peak value time was that standard lightning wave and the wavefront time of 50 μ s is 250 μ s, half peak value time was the standard operation ripple of 2500 μ s, lifting and lowering method pressurization program is adopted in test, after being the gap tolerance, constantly raise trial voltage step by step until the discharge generation, reduce afterwards trial voltage, if still discharge continues to reduce trial voltage; The trial voltage if the gap tolerance then raises, repeat above process, lightning impulse test and switching impulse discharge test are all carried out repeatedly impulsive discharge, can obtain 50% probability sparking voltage of lightning impulse and switching impulse according to the test figure statistics, each Test Point Data match can be plotted discharge characteristic curve;
3) determine necessary insulation clearance according to trial curve:
According to the corresponding different voltages of impulse voltage generator each point height, can find respectively corresponding clearance distance, take each point as the center of circle, corresponding clearance distance is that radius is made circular arc, can obtain corresponding arc envelope line, thereby draws the edge line of apparatus insulated distance.
The below describes principle of the present invention according to instantiation.
At first, determine impulse test voltage
U W, can and carry out experimental study requirement voltage swing according to correlation standard and carry out, then to trial voltage
U WCause that according to insulation research nargin coefficient, the insulation margin coefficient of testing equipment own, large capacity complexity plant efficiency reduces by 3 parameters of correction factor and revises.3 coefficients are selected and can be changed within the specific limits according to concrete test situation with reference to following table, and the designer can be from the test product type, and the actual conditions such as the size of trial voltage are set out and suitably selected.
By carrying out different typical electrode type discharge tests, obtain to impact 50% discharge probability family curve such as Fig. 1-shown in Figure 4, among the figure, d is the discharge test clearance distance,
U 50For impacting 50% discharge probability sparking voltage.According to the equipment rated voltage
U NLook into above-mentioned discharge curve, can draw corresponding clearance distance
d i, will
d iMultiply by again safety margin coefficient (1.1 ~ 1.3), can determine necessary insulation distance.
Because impulse voltage generator is different along height each point pole tension, can according to the each point pole tension respectively correspondence find the respective clearance distance, such as Fig. 5-shown in Figure 6.Each point is followed successively by from top to bottom
, respective distances is respectively
, be that radius is made circular arc with above-mentioned insulation distance, each arc envelope line can determine that the change of impact device insulation distance is along the line.In order to reduce the laboratory height, generator can be installed in deeply and be
hMelt pit in, the laboratory height can reduce
h
The present invention is applicable to different size type impulse voltage generator insulation clear distance and selects.
The content that is not described in detail in this instructions belongs to the known prior art of this area professional and technical personnel.
Claims (1)
1. the required insulation clearance of impulse voltage generator system of selection is characterized in that, may further comprise the steps:
1) according to the rated voltage of test figure confirmed test equipment
U N:
Require to determine impulse test voltage according to the test type of carrying out, test standard
U W, the impact test equipment rated voltage
U NFor:
U N=
K 1·
K 2·
K 3·
U W
Wherein,
K 1Be insulation research nargin coefficient;
K 2Be the insulation margin coefficient of testing equipment own;
K 3For big capacity load causes the correction factor that plant efficiency reduces;
2) carry out discharge test and obtain sparking voltage and distance relation curve:
Select grading ring, two kinds of typical electrode of wire that the simulation steel tower is carried out respectively standard thunder and lightning, switching impulse discharge, in the research interstice coverage, utilizing impulse voltage generator to produce the wavefront time is 1.2 μ s, half peak value time was that standard lightning wave and the wavefront time of 50 μ s is 250 μ s, half peak value time was the standard operation ripple of 2500 μ s, lifting and lowering method pressurization program is adopted in test, after being the gap tolerance, constantly raise trial voltage step by step until the discharge generation, reduce afterwards trial voltage, if still discharge continues to reduce trial voltage; The trial voltage if the gap tolerance then raises, repeat above process, lightning impulse test and switching impulse discharge test are all carried out repeatedly impulsive discharge, can obtain 50% probability sparking voltage of lightning impulse and switching impulse according to the test figure statistics, each Test Point Data match can be plotted discharge characteristic curve;
3) determine necessary insulation clearance according to trial curve:
According to the corresponding different voltages of impulse voltage generator each point height, can find respectively corresponding clearance distance, take each point as the center of circle, corresponding clearance distance is that radius is made circular arc, can obtain corresponding arc envelope line, thereby draws the edge line of apparatus insulated distance.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592579A (en) * | 2013-07-30 | 2014-02-19 | 中国电力科学研究院 | Impulse discharge voltage calculating model construction method |
| CN108008257A (en) * | 2017-11-08 | 2018-05-08 | 中国电力科学研究院有限公司 | Different wave front time impulse sparkover voltage modification method, correcting device and computational methods |
| CN111220883A (en) * | 2020-01-15 | 2020-06-02 | 西安交通大学 | Method and device for detecting insulation defect of basin-type insulator based on steep wave voltage |
| CN114184913A (en) * | 2021-11-30 | 2022-03-15 | 国网重庆市电力公司电力科学研究院 | C5F10O-mixed gas electrical insulation characteristic test method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101187686A (en) * | 2007-12-19 | 2008-05-28 | 中国电力科学研究院 | Tube bus corona inception voltage and extinction voltage test judging method |
| CN101267097A (en) * | 2007-12-26 | 2008-09-17 | 国网武汉高压研究院 | High elevation correction method for ultra-high voltage and ultra-high voltage line air insulation clearance |
| CN201207068Y (en) * | 2008-04-30 | 2009-03-11 | 中国电力科学研究院 | Extra-high voltage power transmission and transformation experiment hall |
| CN101552446A (en) * | 2008-12-19 | 2009-10-07 | 西北电网有限公司 | High-altitude correction method for air insulation gap operating impulse voltage in power transmission line |
| DE102010017303A1 (en) * | 2010-02-05 | 2011-08-11 | Hinow, Georg, Dr. Ing., 01279 | Impulse voltage testing system, has high voltage measuring divider installed as intermediate circuit, measurement signal plotting device possessing correction algorithm, and surge voltage generator for producing pulse voltage |
| US20110202294A1 (en) * | 2010-02-05 | 2011-08-18 | Martin Hinow | High voltage impulse test system with a correction algorithm |
-
2012
- 2012-10-09 CN CN201210379248.4A patent/CN102914674B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101187686A (en) * | 2007-12-19 | 2008-05-28 | 中国电力科学研究院 | Tube bus corona inception voltage and extinction voltage test judging method |
| CN101267097A (en) * | 2007-12-26 | 2008-09-17 | 国网武汉高压研究院 | High elevation correction method for ultra-high voltage and ultra-high voltage line air insulation clearance |
| CN201207068Y (en) * | 2008-04-30 | 2009-03-11 | 中国电力科学研究院 | Extra-high voltage power transmission and transformation experiment hall |
| CN101552446A (en) * | 2008-12-19 | 2009-10-07 | 西北电网有限公司 | High-altitude correction method for air insulation gap operating impulse voltage in power transmission line |
| DE102010017303A1 (en) * | 2010-02-05 | 2011-08-11 | Hinow, Georg, Dr. Ing., 01279 | Impulse voltage testing system, has high voltage measuring divider installed as intermediate circuit, measurement signal plotting device possessing correction algorithm, and surge voltage generator for producing pulse voltage |
| US20110202294A1 (en) * | 2010-02-05 | 2011-08-18 | Martin Hinow | High voltage impulse test system with a correction algorithm |
Non-Patent Citations (4)
| Title |
|---|
| 万启发等: "特高压拉V塔空气间隙外绝缘特性研究", 《电力设备》 * |
| 曹晶等: "高海拔换流站相间操作冲击放电特性分析", 《高电压技术》 * |
| 焦保利等: "特高压同塔双回交流线路的外绝缘特性", 《高电压技术》 * |
| 霍锋等: "750kV双回紧凑型线路杆塔放电特性及绝缘配合", 《高电压技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592579A (en) * | 2013-07-30 | 2014-02-19 | 中国电力科学研究院 | Impulse discharge voltage calculating model construction method |
| CN103592579B (en) * | 2013-07-30 | 2016-03-09 | 国家电网公司 | A kind of impulse sparkover voltage computing model construction method |
| CN108008257A (en) * | 2017-11-08 | 2018-05-08 | 中国电力科学研究院有限公司 | Different wave front time impulse sparkover voltage modification method, correcting device and computational methods |
| CN111220883A (en) * | 2020-01-15 | 2020-06-02 | 西安交通大学 | Method and device for detecting insulation defect of basin-type insulator based on steep wave voltage |
| CN111220883B (en) * | 2020-01-15 | 2021-04-13 | 西安交通大学 | Method and device for detecting insulation defect of basin-type insulator based on steep wave voltage |
| CN114184913A (en) * | 2021-11-30 | 2022-03-15 | 国网重庆市电力公司电力科学研究院 | C5F10O-mixed gas electrical insulation characteristic test method |
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Effective date of registration: 20141216 Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant after: China Electric Power Research Institute Applicant after: State Grid Corporation of China Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant before: China Electric Power Research Institute |