电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2014年
3期
802-806
,共5页
全姗姗%谢梁%谷莉莉%曹晶%彭宗仁%陈小海
全姍姍%謝樑%穀莉莉%曹晶%彭宗仁%陳小海
전산산%사량%곡리리%조정%팽종인%진소해
特高压%同塔双回%刚性跳线%金具%电晕试验%有限元法%电场计算
特高壓%同塔雙迴%剛性跳線%金具%電暈試驗%有限元法%電場計算
특고압%동탑쌍회%강성도선%금구%전훈시험%유한원법%전장계산
UHV%double-circuit on the same tower%rigid jumper%fittings%corona test%finite element method%electric field calculation
1000 kV特高压交流同塔双回输电线路由于电场间的相互影响，其电晕问题更为突出，根据示范工程开展的同塔双回耐张塔跳线及金具的电场计算结果，需要对跳线及其金具结构进行优化。为获得优化后的跳线及金具电晕放电特性，利用紫外成像仪对笼式和铝管式2类不同结构刚性跳线开展电晕特性试验研究，找出有明显电晕放电的跳线及金具，确定放电位置和电晕起始电压试验值。采用三维有限元方法建立仿真模型，计算场强，分析产生电晕的原因。研究结果不仅验证了电晕特性研究方法的有效性，同时表明优化后的跳线及金具能有效降低电场强度，防晕效果显著。根据研究成果，推荐采用的刚性跳线及配套连接金具满足特高压同塔双回输电线路的运行要求，已应用于示范工程的设计建设中。
1000 kV特高壓交流同塔雙迴輸電線路由于電場間的相互影響，其電暈問題更為突齣，根據示範工程開展的同塔雙迴耐張塔跳線及金具的電場計算結果，需要對跳線及其金具結構進行優化。為穫得優化後的跳線及金具電暈放電特性，利用紫外成像儀對籠式和鋁管式2類不同結構剛性跳線開展電暈特性試驗研究，找齣有明顯電暈放電的跳線及金具，確定放電位置和電暈起始電壓試驗值。採用三維有限元方法建立倣真模型，計算場彊，分析產生電暈的原因。研究結果不僅驗證瞭電暈特性研究方法的有效性，同時錶明優化後的跳線及金具能有效降低電場彊度，防暈效果顯著。根據研究成果，推薦採用的剛性跳線及配套連接金具滿足特高壓同塔雙迴輸電線路的運行要求，已應用于示範工程的設計建設中。
1000 kV특고압교류동탑쌍회수전선로유우전장간적상호영향，기전훈문제경위돌출，근거시범공정개전적동탑쌍회내장탑도선급금구적전장계산결과，수요대도선급기금구결구진행우화。위획득우화후적도선급금구전훈방전특성，이용자외성상의대롱식화려관식2류불동결구강성도선개전전훈특성시험연구，조출유명현전훈방전적도선급금구，학정방전위치화전훈기시전압시험치。채용삼유유한원방법건립방진모형，계산장강，분석산생전훈적원인。연구결과불부험증료전훈특성연구방법적유효성，동시표명우화후적도선급금구능유효강저전장강도，방훈효과현저。근거연구성과，추천채용적강성도선급배투련접금구만족특고압동탑쌍회수전선로적운행요구，이응용우시범공정적설계건설중。
Due to interaction among electric fields the corona discharge is more hazardous for the secure operation of 1 000 kV UHVAC double circuit transmission lines on the same tower. The computational results of electric fields of jumpers and fittings for the demonstration project of 1 000 kV UHVAC double circuit transmission lines on the same tower show that the structure of the jumper and fittings should be optimized. To obtain the corona discharge characteristics of optimized jumper and fittings, the experimental investigation for corona discharge characteristics of cage-type and aluminum tube-type of rigid jumpers with different structures is carried out by ultraviolet imager to find the jumpers and fittings with obvious discharge traces to determine the discharge position and the trail value of corona inception voltage. Three-dimensional finite element method is utilized to establish the simulation model to calculate electric field strength and analyze the reason to lead to corona. Results of this research not only validates the effectiveness of the research approach for corona discharge characteristics, but also shows that the optimized jumpers and fittings can effectively decrease the electric field strength and well prevent the occurrence of corona. According to the research results, the recommended rigid jumpers and the matched connecting fittings can meet the operational requirement of UHVAC double circuit transmission lines on the same tower and have been applied in the design and construction of the demonstration project.
