CAJ | 학술논문

750kV输电线路拉西瓦一官厅段位处西北高海拔地区，其耐张塔中相绕跳转角处的间隔棒线夹上电晕放电严重，对周围产生了可听噪声及无线电干扰的污染。为了对绕跳转角处形式和间隔棒结构进行优化，解决该处电晕放电问题，运用三维有限元法建立了750kV耐张塔模型，计算了绕跳转角处问隔棒的电场分布，结果表明中相绕跳由于转角陡、跳线成形差，对转角处间隔棒屏蔽作用较弱，因而导致该处间隔棒线夹上场强高达3540V／mm。针对该问题，提出了增大绕跳转角、增大间隔棒线夹曲率半径和加装屏蔽环或屏蔽球等优化方案，并进行了计算和比较，分析结果表明在间隔棒线夹上安装屏蔽球较为方便可行，能将间隔棒线夹表面最大场强降低至约2200V／mm，可有效抑制间隔棒的放电现象。该研究可为今后超、特高压线路绕跳形式、防晕间隔棒的设计提供研究经验和思路。
750kV수전선로랍서와일관청단위처서북고해발지구，기내장탑중상요도전각처적간격봉선협상전훈방전엄중，대주위산생료가은조성급무선전간우적오염。위료대요도전각처형식화간격봉결구진행우화，해결해처전훈방전문제，운용삼유유한원법건립료750kV내장탑모형，계산료요도전각처문격봉적전장분포，결과표명중상요도유우전각두、도선성형차，대전각처간격봉병폐작용교약，인이도치해처간격봉선협상장강고체3540V／mm。침대해문제，제출료증대요도전각、증대간격봉선협곡솔반경화가장병폐배혹병폐구등우화방안，병진행료계산화비교，분석결과표명재간격봉선협상안장병폐구교위방편가행，능장간격봉선협표면최대장강강저지약2200V／mm，가유효억제간격봉적방전현상。해연구가위금후초、특고압선로요도형식、방훈간격봉적설계제공연구경험화사로。
To suppress the corona, the electric field intensity on the jumper and spacers should be reduced by optimizing structures. Consequently, we constructed a three-dimensional calculation model of the strain tower to compute the electric field distributions of jumpers and spacers, and proposed and compared a variety of optimization schemes, such as increasing the angle of the jumpers, increasing the clamps of the spacers, and installing a grading ring or grading spheres on the spacers. The results demonstrate that installing grading spheres on the spacers is the most reasonable and feasible scheme, which can reduce the maximum electric field intensity from 3540 V/ram to 2200 V/ mm on the surfaces of the spacers.