摘要
同塔双回线路共有六种相序布置方式,为选取最优相序,以皖电东送淮南—上海1000 kV特高压输变电工程为例,利用CDEGS软件包、MATLAB、EMTP程序,仿真计算了同塔双回线路各种导线排列方式下电场、磁场、无线电干扰、可闻噪声、自然功率、线路不平衡度和反击跳闸率。结果表明,相序布置对同塔双回线路的电磁环境、自然功率、线路不平衡度及耐雷性能等电气特性有一定的影响;线路的工频电场、自然功率和线路不平衡度是决定线路最优相序布置的关键因素。综合各种电气特性因素,得出了线路的最优相序布置——ABC/CBA;最后在最优相序布置下推算了1000 kV同塔双回线路跨域建筑物的安全距离。其计算方法与结果可供实际工程参考。
In order to select the optimal sequence from six phase sequence arrangements of double-circuit transmission line on same tower,the Huainan-Shanghai 1000 kV UHV transmission and transformation project was taken as an example.CDEGS software package,MATLAB and EMTP simulation tools were used to simulate and calculate power frequency electric field,magnetic field,radio interference,audible noise,natural power,imbalance transposition and back flashover outage rate under each phase sequence arrangement.The results showed that the arrangement had a certain impact upon the electrical characteristics,such as electromagnetic environment,natural power,imbalance transposition,lightning performance.The power frequency electric field,natural power and imbalance transposition were the key factors which determined optimal phase sequence arrangement of lines.By taking different electrical characteristics into account,the optimal arrangement for 1000kV double-circuit was obtained——ABC/CBA.Finally,the safety distance of 1000kV double-circuit transmission line to the crossing buildings was calculated in the optimal sequence.The calculation method and results can be referenced for practical projects.
出处
《能源工程》
2010年第3期12-18,共7页
Energy Engineering
关键词
相序布置
电磁环境
电晕损失
自然功率
不平衡度
反击跳闸率
安全距离
phase sequence arrangement
electromagnetic environment
corona loss
natural power
imbalance transposition
back flashover outage
safety distance
