CN107656182A

CN107656182A - 220 KV transmission line insulator chain anti-ice-flashing check methods

Info

Publication number: CN107656182A
Application number: CN201711131141.7A
Authority: CN
Inventors: 巢亚锋
Original assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd; State Grid Hunan Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd; State Grid Hunan Electric Power Co Ltd
Priority date: 2017-11-15
Filing date: 2017-11-15
Publication date: 2018-02-02
Anticipated expiration: 2037-11-15
Also published as: CN107656182B

Abstract

The invention discloses a kind of 220 KV transmission line insulator chain anti-ice-flashing check methods, comprise the following steps：Step 1, insulator anti-ice-flashing experts database is established, for storing various dirty area's grades, ice formation grade, the dry arcing distance required value for meeting anti-ice-flashing requirement corresponding to insulator serial type combination；Step 2, the first serial type of basis shaft tower insulator to be checked, residing dirty area's grade and ice formation grade read the dry arcing distance required value under corresponding conditionses in insulator anti-ice-flashing experts database, then the string length of shaft tower insulator to be checked is checked with dry arcing distance required value contrast.The present invention can effectively improve the degree of accuracy of insulator anti-ice-flashing check, and the degree of accuracy climbed is adjusted so as to improve follow-up insulator anti-ice-flashing, and the probability that ice dodges occurs for circuit after reducing maintenance.

Description

220 KV transmission line insulator chain anti-ice-flashing check methods

Technical field

The invention belongs to electric power project engineering field, more particularly to a kind of 220 KV transmission line insulator chain anti-ice-flashings Check method.

Background technology

One of the main reason for overhead transmission line covering ice for insulator flashover is influence power network safety operation.Therefore, The horizontal low old circuit of anti-ice-flashing is carried out external insulation to administer being one of important maintenance task of power supply department.However, due to lacking The determination methods of weary science, when formulating repair schedule, which insulator chain teams and groups technical staff, which often empirically determines, needs It is included in anti-ice-flashing and adjusts climbing plan, and teams and groups' technical personnel quality differs causes to be included in the insulator chain that anti-ice-flashing tune climbs plan There is problem in accuracy, adjust the degree of accuracy climbed so as to influence follow-up insulator anti-ice-flashing, ice occurs for circuit after adding maintenance The probability of sudden strain of a muscle.

Therefore, it is necessary to design a kind of transmission circuit insulator string anti-ice-flashing check method.

The content of the invention

The technical problem to be solved in the present invention is the defects of presence for known technology, there is provided a kind of 220 kilovolts of power transmission lines Road insulator chain anti-ice-flashing check method, the degree of accuracy of insulator anti-ice-flashing check can be effectively improved, so as to improve follow-up insulation Sub- anti-ice-flashing adjusts the degree of accuracy climbed, and the probability that ice dodges occurs for circuit after reducing maintenance.

The technical solution adopted by the present invention is：

A kind of 220 KV transmission line insulator chain anti-ice-flashing check methods, comprise the following steps：

Step 1, insulator anti-ice-flashing experts database is established, for storing various dirty area's grades, ice formation grade, insulator serial type Meet the dry arcing distance required value of anti-ice-flashing requirement corresponding to combination；The determination method of wherein each dry arcing distance required value For：In c level filth areas and heavy icing area overlap-add region, the dry arcing distance required value of pendency I strings of arrangement is not interleave to use as base Number, (as " 3+1 " interleaves) dry arcing distance required value that the pendency I of arrangement goes here and there is interleave using big umbellule and reduces 10% with respect to radix； Using the dry arcing distance required value that the pendency II for not interleaving arrangement goes here and there with respect to radix increase by 10%, arrangement is interleave using big umbellule The dry arcing distance required value that II goes here and there that dangles is identical with radix；The dry arcing distance required value of strain insulator-string list string is reduced with respect to radix 20%, the dry arcing distance required value of the double strings of strain insulator-string reduces 10% with respect to radix；The dry arcing distance required value that V strings are singly gone here and there is with respect to base The dry arcing distance required value that number reduces the double strings of 19%, V strings reduces 10% with respect to radix；For each insulator serial type combination side Formula, respectively by its in c level filth areas dry arcing distance required value corresponding with heavy icing area overlap-add region on the basis of, dirty area's grade is every Rise a grade, dry arcing distance required value increase by 10%, dirty area's grade often declines a grade, and dry arcing distance required value is reduced 10%, ice formation grade often declines a grade, and dry arcing distance required value reduces 5%；

Step 2, first prevented according to the serial type of shaft tower insulator to be checked, residing dirty area's grade and ice formation grade in insulator Ice dodges in experts database the dry arcing distance required value read under corresponding conditionses, then string length and the dry arc by shaft tower insulator to be checked The contrast of required distance value is checked, so as to judge whether the string of shaft tower insulator to be checked length meets anti-ice-flashing requirement (if waiting to check The string length of shaft tower insulator is less than dry arcing distance required value, then is unsatisfactory for anti-ice-flashing requirement).

Further, the radix is arranged to 2m.Now c Ji Wu areas and the various insulator serial type groups of heavy icing area overlap-add region Dry arcing distance required value is as shown in table 1 corresponding to conjunction mode：

Biao1cJi Wu areas dry arcing distance required value corresponding with the various insulator serial type combinations of heavy icing area overlap-add region

Further, in the step 2, the string length of shaft tower insulator to be checked is inquired about in power system device account storehouse And serial type, the coordinate of shaft tower insulator to be checked is extracted, and in electronics fertilizer making by sludge (electronic map) and ice region distribution diagram (electricity Sub- map) in read the coordinate position residing for dirty area's grade and ice formation grade.

220 KV transmission line insulator chain anti-ice-flashing check method provided by the invention, be it is a kind of integrate it is multifactor Check method, the factor of consideration have：Insulator chain length, insulator serial type, dirty area's grade, ice formation grade, insulator anti-ice-flashing are special Family storehouse.The dry arcing distance of a length of insulator chain of insulator chain.The insulator serial type is the arrangement of insulator chain, is wrapped Include pendency I strings, pendency II strings, strain insulator-string and V four kinds of arrangements of string.Dirty area's grade is the dirt of insulator chain present position Area's grade, including five grades of a, b, c, d, e.The ice formation grade is the ice formation grade of insulator chain present position, including gently, In, weight Three Estate.

Beneficial effect：

The present invention can reduce the accuracy that the insulator chain that anti-ice-flashing adjusts plan of climbing is included in caused by peopleware differs Problem, the degree of accuracy of insulator anti-ice-flashing check is effectively improved, the degree of accuracy climbed, drop are adjusted so as to improve follow-up insulator anti-ice-flashing The probability that ice dodges occurs for circuit after low maintenance.

Embodiment

Embodiment 1：

First, insulator anti-ice-flashing experts database is established, for storing various dirty area's grades, ice formation grade, insulator serial type Meet the dry arcing distance required value of anti-ice-flashing requirement corresponding to combination；The determination method of wherein each dry arcing distance required value For：In c level filth areas and heavy icing area overlap-add region, the dry arcing distance required value of pendency I strings of arrangement is not interleave to use as base Number, (as " 3+1 " interleaves) dry arcing distance required value that the pendency I of arrangement goes here and there is interleave using big umbellule and reduces 10% with respect to radix； Using the dry arcing distance required value that the pendency II for not interleaving arrangement goes here and there with respect to radix increase by 10%, arrangement is interleave using big umbellule The dry arcing distance required value that II goes here and there that dangles is identical with radix；The dry arcing distance required value of strain insulator-string list string is reduced with respect to radix 20%, the dry arcing distance required value of the double strings of strain insulator-string reduces 10% with respect to radix；The dry arcing distance required value that V strings are singly gone here and there is with respect to base The dry arcing distance required value that number reduces the double strings of 19%, V strings reduces 10% with respect to radix；For each insulator serial type combination side Formula, respectively by its in c level filth areas dry arcing distance required value corresponding with heavy icing area overlap-add region on the basis of, dirty area's grade is every Rise a grade, dry arcing distance required value increase by 10%, dirty area's grade often declines a grade, and dry arcing distance required value is reduced 10%, ice formation grade often declines a grade, and dry arcing distance required value reduces 5%.

Then, the string length and serial type, extraction that shaft tower insulator to be checked is inquired about in power system device account storehouse treat school The coordinate of core shaft tower insulator；The seat is read in electronics fertilizer making by sludge (electronic map) and ice region distribution diagram (electronic map) Dirty area's grade and ice formation grade residing for cursor position；According to the serial type of shaft tower insulator to be checked, residing dirty area's grade and ice Area's grade reads corresponding dry arcing distance required value in insulator anti-ice-flashing experts database；The string of shaft tower insulator to be checked is grown It compared with dry arcing distance required value, can obtain accurately checking information, be the anti-icing improvement of reasonable arrangement line insulator The anti-icing tune of plan and scene climbs offer technical support.

Above-mentioned 220 KV transmission line insulator chain anti-ice-flashing check method is proved to work well, safely may be used through trying out Lean on, design requirement is fully achieved.

Claims

1. a kind of 220 KV transmission line insulator chain anti-ice-flashing check methods, it is characterised in that comprise the following steps：

Step 1, insulator anti-ice-flashing experts database is established, for storing various dirty area's grades, ice formation grade, the combination of insulator serial type Meet the dry arcing distance required value of anti-ice-flashing requirement corresponding to mode；The determination method of wherein each dry arcing distance required value is：In c The filthy area of level and heavy icing area overlap-add region, the dry arcing distance required value of pendency I strings of arrangement is not interleave to use as radix, is used The dry arcing distance required value that big umbellule interleaves the pendency I strings of (as " 3+1 " interleaves) arrangement reduces 10% with respect to radix；Between not The dry arcing distance required value of the pendency II strings of arrangement is inserted with respect to radix increase by 10%, the pendency II that arrangement is interleave using big umbellule is gone here and there Dry arcing distance required value it is identical with radix；The dry arcing distance required value of strain insulator-string list string reduces 20% with respect to radix, strain insulator-string The dry arcing distance required value of double strings reduces 10% with respect to radix；The dry arcing distance required value that V strings are singly gone here and there reduces 19% with respect to radix, The dry arcing distance required value of the double strings of V strings reduces 10% with respect to radix；For each insulator serial type combination, respectively with it On the basis of c level filth areas dry arcing distance required value corresponding with heavy icing area overlap-add region, dirty area's grade often rises one etc. Level, dry arcing distance required value increase by 10%, dirty area's grade often decline a grade, and dry arcing distance required value reduces 10%, ice formation Grade often declines a grade, and dry arcing distance required value reduces 5%；

Step 2, the first serial type of basis shaft tower insulator to be checked, residing dirty area's grade and ice formation grade are in insulator anti-ice-flashing The dry arcing distance required value under corresponding conditionses, then string length and the dry arcing distance by shaft tower insulator to be checked are read in experts database Required value contrast is checked.

2. 220 KV transmission line insulator chain anti-ice-flashing check method according to claim 1, it is characterised in that institute State radix and be arranged to 2m.

3. according to 220 KV transmission line insulator chain anti-ice-flashing check method according to any one of claims 1 to 2, its It is characterised by, in the step 2, the string length and serial type of shaft tower insulator to be checked is inquired about in power system device account storehouse, The coordinate of shaft tower insulator to be checked is extracted, and is read in electronics fertilizer making by sludge and ice region distribution diagram residing for the coordinate position Dirty area's grade and ice formation grade.