摘要
介绍了750kV系统用无间隙金属氧化物避雷器的结构和主要性能指标。其中,对避雷器的电位分布采用有限元法进行了计算,对其加装并联电容前后的电位分布也进行了分析比较;对避雷器的抗震性能采用有限元法进行计算和分析;并按IEC600994标准规定对避雷器的污秽性能进行了试验验证。分析计算和试验表明:该避雷器的最大电位分布不均匀系数为1·09,能满足长期运行的要求;可用于地震烈度为8度的地区和Ⅲ级污秽地区使用,还可适用于海拔2000m地区。
The structure and major performance index of 750 kV metal oxide lightning arrester （MOA） without gap was introduced. The potential distribution for lightning arrester was calculated with finite element method, and the potential distribution before and after adding shunt reactor was analyzed and compared. The anti- seismic performance of lightning arrester was also calculated and analyzed with finite element method, and according to IEC60099 -4 standard, the poilution performance for lightning arrester was tested and verified. The analysis calculation and tests show that uneven coefficient of the biggest potential distribution for this lightning arrester is 1.09, which can satisfy the requirement of long - term operation, can be used in area with seismic intensity of 8 degrees and with portion of Ⅲ level, and can be applied in area with elevation of 2000 m.
出处
《电力设备》
2005年第12期17-20,共4页
Electrical Equipment
关键词
电力系统
750
KV
避雷器
电位分布
抗震性能
污秽性能
power system
750 kV
lightning arrester
potential distribution
anti- seismic performance
poilution performance
