CN102608501A - Assessment method of external insulting state of natural deposit insulator chain based on cross combination - Google Patents
Assessment method of external insulting state of natural deposit insulator chain based on cross combination Download PDFInfo
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- CN102608501A CN102608501A CN2012100481125A CN201210048112A CN102608501A CN 102608501 A CN102608501 A CN 102608501A CN 2012100481125 A CN2012100481125 A CN 2012100481125A CN 201210048112 A CN201210048112 A CN 201210048112A CN 102608501 A CN102608501 A CN 102608501A
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Abstract
The invention relates to an assessment method of an external insulting state of a natural deposit insulator chain based on cross combination. At current, for the electric insulator chain obtained from a same basic tower, the insulator in some phase is selected for deposit degree test and chemical component analysis and insulators in other phase are tested with flashover voltage. Data analysis on this basis is not very accurate. The invention is featured in that for the natural deposit insulator chain on the same basic tower, a part of insulator is formed by cross combination is used for equivalent salt density and ash density on the surface for chemical component analysis while the other part is used to the flashover voltage test. On this basis, taken impact of salt type and non-uniform deposit on the upper and lower surfaces into consideration, relation between the flashover voltage of the natural deposit insulator chain and the chemical component is obtained. The invention obtains the flashover voltage of the natural deposit insulator chain and the deposit degree data on the surface of the insulator more effectively and obtains a flashover voltage correction formula that is more effective.
Description
Technical field
The present invention relates to the appraisal procedure of insulator external insulation state, the specifically a kind of dirty insulator chain external insulation of natural product state evaluating method based on combined crosswise.
Background technology
Correctly the external insulation state of the dirty insulator of assessment natural product finds the quantitative relationship between dirty insulator contamination voltage of natural product and surface filth degree (equivalent salt density and ash are close) and the chemical constitution, and is significant for prediction, the prevention of realization insulator contamination.
Yet under the system of POWER SYSTEM STATE maintenance at present, transmission line of electricity power failure chance is very few, and the sampling work of hanging net operation insulator is difficulty very.On same basic iron tower, can only get the dirty insulator chain of the charged natural product of 2～3 strings usually.How to make full use of the dirty insulator chain of a limited number of natural products, choose reasonable test methods, it is good problem to study that its external insulation state is assessed.
At present; Usually the method that adopts is; For the charged insulator chain of getting on the same basic iron tower (as getting A, B, C three-phase); Choose certain phase (like the A phase) insulator and carry out filthy degree test and chemical composition analysis, other phase (like B, C phase) insulator carries out the pollution flashover voltage test, carries out data analysis on this basis.Yet there is certain limitation in this method.Owing to the reasons such as difference of insulator hanging position, the long-pending dirty situation of A phase insulator and B, C mutually the long-pending dirty situation of insulator there is some difference.It not is very appropriate utilizing filthy degree and the chemistry of A phase insulator to become data that the flashover voltage data of B, C phase insulator are analyzed.
In addition, in the classic method, when the dirty insulator contamination voltage test of natural product data are analyzed, do not consider the influence of salt type, the inhomogeneous long-pending dirt of upper and lower surfaces.Yet this two aspect but is the key factor that influences pollution flashover voltage.
Summary of the invention
Technical matters to be solved by this invention is to overcome the defective that above-mentioned prior art exists; A kind of dirty insulator chain external insulation of natural product state evaluating method based on combined crosswise is provided; Fully utilize the dirty insulator chain of a limited number of natural products through combined crosswise; Obtain filthy degree, chemical constitution and the pollution flashover voltage of insulator chain, analyze the updating formula that obtains the dirty insulator chain pollution flashover voltage of natural product on this basis.
For this reason; The technical scheme that the present invention adopts is following: the dirty insulator chain external insulation of the natural product state evaluating method based on combined crosswise, it is characterized in that, and fully utilize the dirty insulator chain of a limited number of natural products through combined crosswise; To the dirty insulator chain of the natural product on the same basic iron tower; The a part of insulator of composition that intersects is used for surperficial equivalent salt density (ESDD) and ash close (NSDD) and carries out chemical composition analysis, and a part is used for the pollution flashover voltage test, on this basis; Consider the influence of salt type, the inhomogeneous long-pending dirt of upper and lower surfaces, obtain the relation between dirty insulator chain pollution flashover voltage of natural product and surface filth degree (equivalent salt density and ash are close) and the chemical constitution; The concrete steps of said appraisal procedure are following:
(a) get dirty insulator chain 3 strings of the charged natural product that hangs on the same basic iron tower, each is a string for A, B, C three-phase, and each the sheet insulator in the two phase insulator chains is wherein numbered;
(b) confirm that two mutually pending filthy degree are tested and the insulator of chemical composition analysis;
(c) confirm the insulator that two mutually pending pollution flashover voltages are tested;
(d) carry out the combined crosswise of two phase insulators, to two mutually in the insulator of pending filthy degree test and chemical composition analysis form insulator chain, then this insulator chain is carried out filthy degree test and chemical composition analysis;
(e) carry out the combined crosswise of two phase insulators, to two mutually in the insulator of pending pollution flashover voltage test form insulator chain, then this insulator chain is carried out the pollution flashover voltage test;
(f) equivalent salt density (ESDD) that measures according to many group test products, ash close (NSDD), Ca
2+Concentration and pollution flashover voltage data through data fitting, obtain the pollution flashover voltage of the dirty insulator chain of natural product and the quantitative relationship between surface filth degree (equivalent salt density and ash are close) and the chemical constitution.
The present invention is a kind of method that can effectively assess the dirty insulator external insulation of natural product state; Compare with classic method; Can access dirty insulator chain pollution flashover voltage of more efficiently natural product and the filthy degrees of data of insulator surface, and obtain more efficiently pollution flashover voltage updating formula.
Below in conjunction with Figure of description and embodiment the present invention is described further.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is the dirty A phase of the same iron tower natural product insulator chain (being the 1# string) of the pending state estimation of the present invention.
Fig. 3 is the dirty B phase of the same iron tower natural product insulator chain (being the 2# string) of the pending state estimation of the present invention.
Fig. 4 is the insulator chain (being the 3# string) of pending filthy degree test of the present invention and chemical composition analysis.
Fig. 5 is the insulator chain (being the 4# string) of the pending pollution flashover voltage test of the present invention.
Embodiment
Get dirty insulator chain 3 strings (each is a string for A, B, C three-phase) of the charged natural product that hangs on certain 110kV iron tower.
Utilization combined crosswise method is assessed the dirty insulator chain external insulation of natural product state below, and concrete steps are following:
1. each the sheet insulator in wherein A, the B phase insulator chain is numbered, shown in Fig. 2-3.
2. confirm the insulator of pending filthy degree test and chemical composition analysis.2-2#, 2-4#, the 2-6# insulator combined crosswise that 1-1#, 1-3#, 1-5# insulator and the 2# that utilizes 1# to go here and there goes here and there becomes the insulator chain (3# string) of pending filthy degree test, and be as shown in Figure 4.
3. confirm the insulator of pending pollution flashover voltage test.2-1#, 2-3#, the 2-5# insulator combined crosswise that 1-2#, 1-4#, 1-6# insulator and the 2# that utilizes 1# to go here and there goes here and there becomes the insulator chain (4# string) of pending pollution flashover voltage test, and be as shown in Figure 5.
4. 8 insulators during the 3# that combined crosswise is formed goes here and there carry out filthy degree test and chemical composition analysis respectively.
Filth degree test result is as shown in table 1.
On-the-spot filthy degree (SPS) test result of the dirty insulator of table 1 natural product
Can know that by table 1 for the 3# string that combined crosswise forms, the ESDD mean value of 8 insulators is 0.1317mg/cm
2, NSDD mean value is 0.4578mg/cm
2And be 0.1517mg/cm to ESDD mean value with basic iron tower C phase insulator (not carrying out combined crosswise)
2, NSDD mean value is 0.6265mg/cm
2Data result shows, the long-pending dirty situation of C phase insulator and A, B mutually the long-pending dirty situation of insulator there is some difference.It not is very appropriate utilizing filthy degree and the chemistry of C phase insulator to become data that the flashover voltage data of A, B phase insulator are analyzed.
The chemical composition analysis result of 8 insulators in the 3# string is as shown in table 2.
Table 2 chemical composition analysis result
5. the 4# string that combined crosswise is formed carries out the pollution flashover voltage test.
Adopt the method for evenly boosting to obtain 4# string pollution flashover voltage value be U
f=122.9kV.
6. measure equivalent salt density (ESDD), ash close (NSDD), Ca according to many group test products
2+Concentration and pollution flashover voltage data through data fitting, obtain the pollution flashover voltage of the dirty insulator chain of natural product and the quantitative relationship between surface filth degree (equivalent salt density and ash are close) and the chemical constitution.
Many group test products measure equivalent salt density (ESDD), ash close (NSDD), Ca
2+Concentration and pollution flashover voltage data are shown in table 3.
Table 3 value salt close (ESDD), ash close (NSDD), Ca2+ concentration and pollution flashover voltage data
Adopt the test findings of 1stOpt DAS his-and-hers watches 3 to carry out data fitting, can obtain the dirty insulator chain flashover voltage of natural product U
fWith the relational expression of ESDD, NSDD, T/B, D be:
U
f＝35.76[1-0.4×In(T/B)]·[(1-1.13D
2.57)·ESD]
-0.24·NSDD
-0.15?。
Claims (1)
1. based on the dirty insulator chain external insulation of the natural product of combined crosswise state evaluating method; It is characterized in that; Fully utilize the dirty insulator chains of a limited number of natural products through combined crosswise,, intersect and form a part of insulator to be used for surperficial equivalent salt density close and carry out chemical composition analysis with ash the dirty insulator chain of the natural product on the same basic iron tower; A part is used for the pollution flashover voltage test; On this basis, consider the influence of salt type, the inhomogeneous long-pending dirt of upper and lower surfaces, obtain the relation between the dirty insulator chain pollution flashover voltage of natural product and surface filth degree and the chemical constitution; The concrete steps of said appraisal procedure are following:
A) get dirty insulator chain 3 strings of the charged natural product that hangs on the same basic iron tower, each is a string for A, B, C three-phase, and each the sheet insulator in the two phase insulator chains is wherein numbered;
B) confirm that two mutually pending filthy degree are tested and the insulator of chemical composition analysis;
C) confirm the insulator that two mutually pending pollution flashover voltages are tested;
D) carry out the combined crosswise of two phase insulators, to two mutually in the insulator of pending filthy degree test and chemical composition analysis form insulator chain, then this insulator chain is carried out filthy degree test and chemical composition analysis;
E) carry out the combined crosswise of two phase insulators, to two mutually in the insulator of pending pollution flashover voltage test form insulator chain, then this insulator chain is carried out the pollution flashover voltage test;
F) equivalent salt density that measures according to many group test products, close, the Ca of ash
2+Concentration and pollution flashover voltage data through data fitting, obtain the pollution flashover voltage of the dirty insulator chain of natural product and the quantitative relationship between surface filth degree and the chemical constitution.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472373A (en) * | 2013-08-27 | 2013-12-25 | 国家电网公司 | Method for evaluating external insulation equivalence of natural pollution insulator and artificial pollution insulator |
| CN103674990A (en) * | 2013-09-29 | 2014-03-26 | 广州供电局有限公司 | Determination method for filthy components of high-voltage insulator |
| CN103809084A (en) * | 2012-11-15 | 2014-05-21 | 南车青岛四方机车车辆股份有限公司 | Flashover voltage prediction method for high speed train roof insulator |
| CN104090218A (en) * | 2014-07-11 | 2014-10-08 | 国家电网公司 | Method for safe region evaluation of filthy degree of electric transmission line insulator |
| CN104459489A (en) * | 2014-12-05 | 2015-03-25 | 深圳供电局有限公司 | Method for identifying contamination degree of post insulator |
| CN105785243A (en) * | 2016-04-08 | 2016-07-20 | 国家电网公司 | Evaluation method for insulator icing flashover risk of ultrahigh voltage alternating-current transmission line |
| CN106199352A (en) * | 2016-06-28 | 2016-12-07 | 华北电力大学（保定） | The modification method of insulator contamination voltage under a kind of high conductivity mist |
| CN115877154A (en) * | 2023-02-27 | 2023-03-31 | 国网江西省电力有限公司电力科学研究院 | Method for obtaining short-circuit mixed discharge characteristic of bird nest material of dirt-accumulating post insulator |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103809084A (en) * | 2012-11-15 | 2014-05-21 | 南车青岛四方机车车辆股份有限公司 | Flashover voltage prediction method for high speed train roof insulator |
| CN103809084B (en) * | 2012-11-15 | 2016-12-21 | 中车青岛四方机车车辆股份有限公司 | A kind of Forecasting Methodology of bullet train roof insulator contamination voltage |
| CN103472373A (en) * | 2013-08-27 | 2013-12-25 | 国家电网公司 | Method for evaluating external insulation equivalence of natural pollution insulator and artificial pollution insulator |
| CN103674990B (en) * | 2013-09-29 | 2016-08-17 | 广州供电局有限公司 | High-tension insulator filth method for measuring components |
| CN103674990A (en) * | 2013-09-29 | 2014-03-26 | 广州供电局有限公司 | Determination method for filthy components of high-voltage insulator |
| CN104090218A (en) * | 2014-07-11 | 2014-10-08 | 国家电网公司 | Method for safe region evaluation of filthy degree of electric transmission line insulator |
| CN104459489A (en) * | 2014-12-05 | 2015-03-25 | 深圳供电局有限公司 | Method for identifying contamination degree of post insulator |
| CN104459489B (en) * | 2014-12-05 | 2017-06-16 | 深圳供电局有限公司 | Method for identifying contamination degree of post insulator |
| CN105785243A (en) * | 2016-04-08 | 2016-07-20 | 国家电网公司 | Evaluation method for insulator icing flashover risk of ultrahigh voltage alternating-current transmission line |
| CN105785243B (en) * | 2016-04-08 | 2019-03-29 | 国家电网公司 | A kind of ultrahigh voltage alternating current transmission lines covering ice for insulator flashover methods of risk assessment |
| CN106199352A (en) * | 2016-06-28 | 2016-12-07 | 华北电力大学（保定） | The modification method of insulator contamination voltage under a kind of high conductivity mist |
| CN115877154A (en) * | 2023-02-27 | 2023-03-31 | 国网江西省电力有限公司电力科学研究院 | Method for obtaining short-circuit mixed discharge characteristic of bird nest material of dirt-accumulating post insulator |
| CN115877154B (en) * | 2023-02-27 | 2023-08-15 | 国网江西省电力有限公司电力科学研究院 | Method for obtaining bird nest material short circuit mixed discharge characteristics of pollution accumulation post insulator |
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