摘要
为了获得双回1 000kV与双回500kV交流同塔多回输电线路雨天电晕损耗的数据,开展了试验及仿真计算研究。采用有限元方法对电晕笼内和华东地区拟架设塔型的导线表面电场强度进行了计算;应用光纤数字化电晕损耗测量系统对电晕笼内4×LGJ-630和8×LGJ-630导线分别进行了干燥和淋雨条件下的电晕损耗测量;采用电晕损耗等效方法计算了淋雨条件下拟建塔型的电晕损耗。结果表明:干燥条件下,电晕笼内的4分裂导线和8分裂导线分别在施加电压为350kV和400kV时全线起晕;而在大雨条件下则没有明显的全线起晕拐点。计算得到双回1 000kV与双回500kV线路在大雨下单位长度(1km)电晕损耗分别为300.99kW和80.92kW。
In order to obtain data of corona loss of AC multi-circuit transmission line with double-circuit 1 000 kV and double-circuit 500 kV on the same tower,we performed both test and simulation studies.The finite element method was used to calculate the field strength on the surface of wires in a corona cage and wires for the future East China towers.An optical digital corona loss measurement system was adopted to measure the corona loss of a 4×LGJ-630 wire and an 8×LGJ-630 wire in the corona cage under dry/rain conditions.The corona loss of the towers under rain condition was calculated by using the corona loss equivalent method.The result shows that,under the dry condition,both 4 bundled and 8 bundled conductors in the corona cage haloed all over when their voltages were 350 kV and 400 kV,respectively;however,there was no inflection point in the voltage which would induce all-over halo under the rain condition.According to the calculations,under the heavy rain condition,the corona losses of 1 km double-circuit 1 000 kV and double-circuit 500 kV were 300.99 kW and 80.92 kW,respectively.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2013年第3期592-596,共5页
High Voltage Engineering
基金
国家电网公司科技项目(SG0952)~~
