高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2012年
3期
697-703
,共7页
周远翔%关雪飞%吴方芳%张树林%梁前晟%高峰
週遠翔%關雪飛%吳方芳%張樹林%樑前晟%高峰
주원상%관설비%오방방%장수림%량전성%고봉
雷击跳闸%同塔双回输电线路%Monte%Carlo法%随机参数%反击跳闸%绕击跳闸
雷擊跳閘%同塔雙迴輸電線路%Monte%Carlo法%隨機參數%反擊跳閘%繞擊跳閘
뢰격도갑%동탑쌍회수전선로%Monte%Carlo법%수궤삼수%반격도갑%요격도갑
lightning flashover%double-circuit transmission lines on the same tower%Monte Carlo method%random parameters%back flashover%shielding failure flashover
同塔双回输电线路较之电压等级相同的单回输电线路具有导线数量多、杆塔高度高等结构特点,更易发生雷击故障。为了深入研究同塔双回输电线路雷击跳闸机理,结合忻州地区实际线路数据,基于Monte Carlo法这一随机数学方法建立了适用于同塔双回输电线路的雷击跳闸率仿真流程,并对其随机参数产生的影响进行了深入探讨,比较分析了单、双回输电线路雷击跳闸率受随机参数影响的敏感程度。结果表明,较之同电压等级下单回输电线路,双回输电线路对雷击部位更为敏感,其绕击跳闸率随地面倾角增加而增加的幅度更大;在考虑工频叠加电压后,单、双回输电线路反击跳闸率均有显著提高,地面倾角较大的情况下单回输电线绕击跳闸率略微减小,而双回输电线路绕击跳闸率则有明显增大。
同塔雙迴輸電線路較之電壓等級相同的單迴輸電線路具有導線數量多、桿塔高度高等結構特點,更易髮生雷擊故障。為瞭深入研究同塔雙迴輸電線路雷擊跳閘機理,結閤忻州地區實際線路數據,基于Monte Carlo法這一隨機數學方法建立瞭適用于同塔雙迴輸電線路的雷擊跳閘率倣真流程,併對其隨機參數產生的影響進行瞭深入探討,比較分析瞭單、雙迴輸電線路雷擊跳閘率受隨機參數影響的敏感程度。結果錶明,較之同電壓等級下單迴輸電線路,雙迴輸電線路對雷擊部位更為敏感,其繞擊跳閘率隨地麵傾角增加而增加的幅度更大;在攷慮工頻疊加電壓後,單、雙迴輸電線路反擊跳閘率均有顯著提高,地麵傾角較大的情況下單迴輸電線繞擊跳閘率略微減小,而雙迴輸電線路繞擊跳閘率則有明顯增大。
동탑쌍회수전선로교지전압등급상동적단회수전선로구유도선수량다、간탑고도고등결구특점,경역발생뢰격고장。위료심입연구동탑쌍회수전선로뢰격도갑궤리,결합흔주지구실제선로수거,기우Monte Carlo법저일수궤수학방법건립료괄용우동탑쌍회수전선로적뢰격도갑솔방진류정,병대기수궤삼수산생적영향진행료심입탐토,비교분석료단、쌍회수전선로뢰격도갑솔수수궤삼수영향적민감정도。결과표명,교지동전압등급하단회수전선로,쌍회수전선로대뢰격부위경위민감,기요격도갑솔수지면경각증가이증가적폭도경대;재고필공빈첩가전압후,단、쌍회수전선로반격도갑솔균유현저제고,지면경각교대적정황하단회수전선요격도갑솔략미감소,이쌍회수전선로요격도갑솔칙유명현증대。
Compared to single-circuit transmission line with the same voltage level,double-circuit transmission line has higher probability of lightning flashover,which is caused by structural characteristics,such as the more numbers of conductors,the higher tower-body,etc.In order to study the characteristics of double-circuit transmission line lightning flashover,according to engineering data collected from transmission lines in Xinzhou,Shanxi province,we established a simulation process applied to the double-circuit transmission line lightning flashover by the random mathematical method of Monte Carlo.The effects of random parameters in this process were discussed,and the different sensitivities to these parameters of double-circuit and single-circuit transmission line lightning flashover rate were compared.The results show that,compared to single-circuit transmission line with the same voltage level,double-circuit transmission line is more sensitive with lightning striking position,and the shielding failure flashover rate increases more quickly as the obliquity on the ground increases.After taking the power frequency voltage into consideration,the back flashover rates of double-circuit and single-circuit transmission lines are significantly increased.And with the high obliquity on the ground,the shielding failure flashover rate of single-circuit transmission line is decreased appreciably,and that of double-circuit transmission line is increased obviously.