CN102508122A - Elevation correction method for critical coronal voltage of hardware fittings of high-elevation transmission lines - Google Patents
Elevation correction method for critical coronal voltage of hardware fittings of high-elevation transmission lines Download PDFInfo
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Abstract
The invention provides an elevation correction method for critical coronal voltage of hardware fittings of high-elevation transmission lines. The elevation correction method is based on data of corona discharge characteristic of hardware fittings at simulated elevation in tests carried out in an ultra-high-voltage alternating-current test base environment and climate laboratory, and the correction method realizes exponential-form fitting, and can be applied to elevation correction calculation for design and optimal research for the high-elevation 330-kV alternating-current transmission lines. The elevation correction method has the advantages that calculation for elevation correction factors for the hardware fittings of the 330-kV alternating-current transmission lines in high-elevation areas is provided, equipment size and design basis meeting actual running requirements are provided, and simultaneously, fundamental data and reference for optimization and improvement operation of the hardware fittings are provided.
Description
Technical field
The present invention relates to a kind of gold utensil discharge inception voltage elevation correction method; Belong to transmission line of electricity High-Voltage Technology field; Be particularly related to a kind of based on hardware corona flash-over characteristic test under the simulation height above sea level of carrying out in the amblent air temperature testing laboratory of extra-high-voltage alternating current test base; Adopt the bearing calibration of exponential form match, can be used for high height above sea level 330kV transmission line of alternation current design and optimization research correction calculation.
Background technology
Influencing ultra-high-tension power transmission line hardware corona starting potential factor has a lot, like electrode shape and smooth surface degree, pollution level etc., more than is internal factor, before carrying out the hardware corona test, can these influences be reduced to minimum through human factor.In addition, corona discharge can receive the ambient atmosphere condition, influences like external factor such as atmospheric density, temperature, humidity, wind-force; Wherein elasticity effect is relatively large, and sea level elevation is high more, and atmospheric density is more little; The electronics mean free path is long more in the air; Corona inception voltage or take-off potential gradient are more little, and corona discharge level or corona intensity can be big more, thereby corona produces audible noise and radio interference is big more.When carrying out the design of high height above sea level transmission line of electricity, need to consider the influence of height above sea level factor, utilize suitable elevation correction method to select to satisfy the equipment size of high height above sea level service requirement.
At present, also not about the national standard and the industry standard of discharge inception voltage atmospheric correction, promptly how the discharge inception voltage value of electrical equipment under the non-standard atmospheric conditions is converted under the standard ambient condition.And the elevation correction method of discharge inception voltage is about to the breadboard test findings in low altitude area and is corrected to the high altitude localities, also is only limited to gold utensil and the insulator used the alternating current circuit.The correction factor deviation is bigger as a result but the whole bag of tricks is to actual tests; Wherein the method that proposes of standard GB/T2317.2-2008 with amblent air temperature chamber 500m, 1500m, 2500m, 3500m, following 5 the simulation height above sea level experimental tests adjustments of data of 4300m after (500m simulation elevation correction factor is 1), draw correction error＜10% with measured data contrast under the 19m simulation height above sea level.Standard GB/T775.2-2003 is to after simulating the height above sea level experimental tests adjustment of data, and all above 15%, wherein the shading ring correction error is maximum, reaches 22.1% under 4300m simulation height above sea level for correction error.After method was proofreaied and correct among the international standard IEC60071-2:1996, error was all above 10% under 4300m simulation height above sea level for correction error, and wherein the shading ring correction error is maximum, reaches 18.0%.This shows that existing country, international standard recommend method are not suitable for as general elevation correction method.
Relate to the patent documentation of this respect in the prior art; For example the patent No. is 200910219317.3 application for a patent for invention: a kind of 750kV transmission line wire discharge inception voltage high-altitude correction method; The height above sea level correction form that proposes; Only be discharge inception voltage altitude correcting method for lead, rather than the altitude correcting method of gold utensil.In this field of discharge inception voltage altitude correcting method of gold utensil, openly in this respect technology of document is not arranged as yet.
In view of this, being necessary to provide a kind of high height above sea level transmission line hardware discharge inception voltage elevation correction method, is description object with the 330kV transmission line hardware, proposes to satisfy the bearing calibration of 0-4300m elevation correction demand according to difference simulation height above sea level experimental tests result.
Summary of the invention
The objective of the invention is: for 330kV transmission line of alternation current, the high altitude localities gold utensil elevation correction Factor Calculation method that is applicable to is provided; The equipment size and the design considerations of actual motion demand satisfied in proposition, for gold utensil optimization and improvement basic data and reference is provided simultaneously.
Technical scheme of the present invention is: a kind of high height above sea level transmission line hardware discharge inception voltage elevation correction method, said bearing calibration comprises the steps:
1) according to exchanging hardware corona test standard method for arranging, the transmission line of alternation current gold utensil is arranged on the transmission line simulation,, obtains the corona inception voltage family curve of gold utensil through carrying out the test of hardware corona flash-over characteristic;
2) according to the corona inception voltage family curve, be worth as a reference to simulate low height above sea level experimental tests magnitude of voltage, difference is simulated hardware corona sparking voltage value obtains the different height above sea level points of simulating and descends correction factor Ka divided by reference value height above sea level point under;
3) the correction factor ka that tries to achieve in the step 2 is brought in the formula (1):
Ka＝ae
bH/1000 ..................(1)
Wherein, Ka is an elevation correction index; A, b are coefficient to be asked; E=2.718; H is a sea level elevation, and unit is a rice;
4) corresponding different structure form of electrical appliance calculates corresponding coefficient to be asked, and gets the value that calculates a, b after each coefficient arithmetic mean value; Again the value of a, b is brought in the formula (1) of step 3, obtain elevation correction factor exponential form mathematic(al) representation, adopt this expression formula promptly to can be used for the elevation correction of high height above sea level gold utensil discharge inception voltage.
The invention has the beneficial effects as follows: gold utensil elevation correction Factor Calculation in 330kV transmission line of alternation current, high altitude localities is provided, proposes to satisfy the equipment size and the design considerations of actual motion demand, for gold utensil optimization and improvement basic data and reference are provided simultaneously.
Description of drawings
Fig. 1 is shading ring initial corona voltage test result under the different simulation sea level elevations.
Fig. 2 is damper initial corona voltage test result under the different simulation sea level elevations.
Fig. 3 is conductor spacer initial corona voltage test result under the different simulation sea level elevations.
Fig. 4 is suspension clamp initial corona voltage test result under the different simulation sea level elevations.
Fig. 5 is the synoptic diagram that adopts the exponential form approximating method gold utensil discharge inception voltage to be carried out match with the sea level elevation variation relation.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation.
High height above sea level transmission line hardware discharge inception voltage elevation correction method provided by the invention; Be a kind of based on hardware corona flash-over characteristic test figure under the simulation height above sea level of carrying out in the amblent air temperature testing laboratory of extra-high-voltage alternating current test base; Adopt the bearing calibration of exponential form match, the elevation correction that can be used for the design and optimization research of high height above sea level 330kV transmission line of alternation current is calculated.
Said method is based on test figure under the high height above sea level condition of a large amount of simulations, and the curve fitting through exponential form obtains.
Through carry out the visual corona test in amblent air temperature laboratory, extra-high-voltage alternating current test base; Select strain insulator shading ring, bell-jar damper, tuning-fork type damper, conductor spacer and 5 kinds of dissimilar 330kV of suspension clamp transmission line of alternation current typical case's gold utensil as test specimen, each test product initial corona voltage test result sees Fig. 1-shown in Figure 4.
Under different mould plan sea level elevation, find out that along with height above sea level raises, discharge inception voltage is on a declining curve, and dissimilar gold utensil all presents identical rule gold utensil discharge inception voltage and the sea level elevation relation curve.Given this, for convenience of explanation, the present invention is applicable to the general elevation correction formula of different gold utensils analyzing on the summary great number tested data basis with the research of sea level elevation Changing Pattern with the shading ring discharge inception voltage.
The practical implementation step of high height above sea level transmission line hardware discharge inception voltage elevation correction method of the present invention is following:
1) according to exchanging hardware corona test method for arranging, the transmission line of alternation current gold utensil is arranged on the transmission line simulation,, obtains the corona inception voltage family curve of gold utensil through carrying out the test of hardware corona flash-over characteristic;
2) according to the corona inception voltage family curve, be worth as a reference to simulate low height above sea level experimental tests magnitude of voltage, difference is simulated hardware corona sparking voltage value obtains the different height above sea level points of simulating and descends correction factor Ka divided by reference value height above sea level point under; Test here is to simulate 19m height above sea level experimental tests data as the basis, amblent air temperature chamber 500m, 1500m, 2500m, 3500m, following 5 the simulation height above sea level experimental tests data of 4300m divided by test figure under the 19m, are obtained different simulation height above sea level points correction factor Ka down;
3) obtain relation curve between elevation correction factor Ka and the simulation sea level elevation H thus, adopt the exponential form approximating method that the gold utensil discharge inception voltage is carried out match with the sea level elevation variation relation, fitting result is seen shown in Figure 5.Can find out from matched curve, adopt exponential form better the test data fitting effect.
Adopt the exponential fitting form to conduct a research during 4) to gold utensil elevation correction factor analysis.According to the matched curve expression formula and through proper transformation, provide elevation correction factor exponential fitting form mathematic(al) representation and do
Ka＝ae
bH/1000
Wherein, Ka is an elevation correction index; A, b are coefficient to be asked; E=2.718; H is a sea level elevation.
5) corresponding different structure form of electrical appliance can calculate corresponding coefficient to be asked, and draws a, the value of b after getting each coefficient arithmetic mean value.Test figure obtains a=1.004 here, b=0.087.Elevation correction factor exponential form mathematic(al) representation does after bringing corresponding coefficient into
Ka=1.004e
0.087H(H is between 0-4300m)
After adopting this expression formula, can know through the correction error of comparative analysis test findings that the correction error absolute value can be controlled in 5%, correcting result is superior to having now the elevation correction method of recommending in country, the international standard, recommends engineering with reference to use.
Claims (1)
1. one kind high height above sea level transmission line hardware discharge inception voltage elevation correction method, said bearing calibration comprises the steps:
1) according to exchanging hardware corona test standard method for arranging, the transmission line of alternation current gold utensil is arranged on the transmission line simulation,, obtains the corona inception voltage family curve of gold utensil through carrying out the test of hardware corona flash-over characteristic;
2) according to the corona inception voltage family curve, be worth as a reference to simulate low height above sea level experimental tests magnitude of voltage, difference is simulated hardware corona sparking voltage value obtains the different height above sea level points of simulating and descends correction factor Ka divided by reference value height above sea level point under;
3) the correction factor ka that tries to achieve in the step 2 is brought in the formula (1):
Ka＝ae
bH/1000 ..................(1)
Wherein, Ka is an elevation correction index; A, b are coefficient to be asked; E=2.718; H is a sea level elevation, and unit is a rice, and the value of H is between 0-4300m;
4) corresponding different structure form of electrical appliance calculates corresponding coefficient to be asked, and gets the value that calculates a, b after each coefficient arithmetic mean value; Again the value of a, b is brought in the formula (1) of step 3, obtain elevation correction factor exponential form mathematic(al) representation, adopt this expression formula promptly to can be used for the elevation correction of high height above sea level gold utensil discharge inception voltage.
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Cited By (10)
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|---|---|---|---|---|
| CN103323720A (en) * | 2013-07-04 | 2013-09-25 | 华北电力大学（保定） | Method for estimating conductor corona loss under high-altitude wind-blown sand conditions |
| CN104316850A (en) * | 2014-10-29 | 2015-01-28 | 国家电网公司 | Method for correcting corona discharge voltage of alternating-current line hardware |
| CN106291284A (en) * | 2016-08-22 | 2017-01-04 | 中国电力科学研究院 | Alternating current circuit gold utensil discharge inception voltage simulation test altitude correction factor determines method |
| CN107870291A (en) * | 2017-11-13 | 2018-04-03 | 南方电网科学研究院有限责任公司 | Voltage equalizing ball discharge voltage acquisition methods and system |
| CN108345569A (en) * | 2018-02-07 | 2018-07-31 | 中国电力科学研究院有限公司 | A kind of method and system for calculating high voltage direct current conducting wire bloom field strength |
| CN108387826A (en) * | 2018-03-08 | 2018-08-10 | 华北电力大学（保定） | Consider the modified super extra-high voltage split conductor bloom field intensity prediction method of height above sea level |
| CN109143138A (en) * | 2018-06-20 | 2019-01-04 | 中国电力科学研究院有限公司 | A kind of modified method of extra-high voltage equipment external insulation withstanding voltage height above sea level |
| CN109752632A (en) * | 2019-01-26 | 2019-05-14 | 云南电网有限责任公司迪庆供电局 | A kind of High aititude transmission line hardware discharge inception voltage elevation correction method |
| CN110361635A (en) * | 2018-11-26 | 2019-10-22 | 华北电力大学 | It is a kind of for determining the method and device of corona inception voltage |
| CN111521915A (en) * | 2020-03-24 | 2020-08-11 | 中国电力科学研究院有限公司 | High-voltage direct-current line corona onset field strength determination method and system |
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| CN103323720B (en) * | 2013-07-04 | 2016-03-09 | 华北电力大学（保定） | Conductor corona loss estimating method under High aititude dust storm condition |
| CN103323720A (en) * | 2013-07-04 | 2013-09-25 | 华北电力大学（保定） | Method for estimating conductor corona loss under high-altitude wind-blown sand conditions |
| CN104316850A (en) * | 2014-10-29 | 2015-01-28 | 国家电网公司 | Method for correcting corona discharge voltage of alternating-current line hardware |
| CN106291284A (en) * | 2016-08-22 | 2017-01-04 | 中国电力科学研究院 | Alternating current circuit gold utensil discharge inception voltage simulation test altitude correction factor determines method |
| CN107870291A (en) * | 2017-11-13 | 2018-04-03 | 南方电网科学研究院有限责任公司 | Voltage equalizing ball discharge voltage acquisition methods and system |
| CN108345569B (en) * | 2018-02-07 | 2023-04-18 | 中国电力科学研究院有限公司 | Method and system for calculating high-voltage direct-current lead corona starting field intensity |
| CN108345569A (en) * | 2018-02-07 | 2018-07-31 | 中国电力科学研究院有限公司 | A kind of method and system for calculating high voltage direct current conducting wire bloom field strength |
| CN108387826A (en) * | 2018-03-08 | 2018-08-10 | 华北电力大学（保定） | Consider the modified super extra-high voltage split conductor bloom field intensity prediction method of height above sea level |
| CN108387826B (en) * | 2018-03-08 | 2020-06-26 | 华北电力大学（保定） | Ultra-high voltage split conductor corona onset field strength prediction method considering altitude correction |
| CN109143138A (en) * | 2018-06-20 | 2019-01-04 | 中国电力科学研究院有限公司 | A kind of modified method of extra-high voltage equipment external insulation withstanding voltage height above sea level |
| CN110361635A (en) * | 2018-11-26 | 2019-10-22 | 华北电力大学 | It is a kind of for determining the method and device of corona inception voltage |
| CN110361635B (en) * | 2018-11-26 | 2020-07-14 | 华北电力大学 | Method and device for determining corona starting voltage |
| CN109752632A (en) * | 2019-01-26 | 2019-05-14 | 云南电网有限责任公司迪庆供电局 | A kind of High aititude transmission line hardware discharge inception voltage elevation correction method |
| CN109752632B (en) * | 2019-01-26 | 2021-08-10 | 云南电网有限责任公司迪庆供电局 | Altitude correction method for corona onset voltage of high-altitude power transmission line hardware fitting |
| CN111521915B (en) * | 2020-03-24 | 2023-03-21 | 中国电力科学研究院有限公司 | High-voltage direct-current line corona onset field strength determination method and system |
| CN111521915A (en) * | 2020-03-24 | 2020-08-11 | 中国电力科学研究院有限公司 | High-voltage direct-current line corona onset field strength determination method and system |
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