摘要
MOA是积极开展1000kV交流特高压电网建设不可缺少的电力设备之一。为研究1000kVMOA的杂散电容分布变化对电位分布的影响及均压措施的选取,依据实体模型建立了支柱式避雷器的2D轴对称有限元模型,对其电位分布进行了计算;分析了影响避雷器电位分布的多种因素,以电阻片电压偏差为目标函数对均压措施进行了讨论。在避雷器最大持续运行电压下,用光纤-电流法测量避雷器中电阻片轴向电压分布的结果与计算结果相比较,结果表明理论计算值与实际测量值趋势基本一致,最大偏差为7.7%。最后给出了电压偏差分布较为合理的一种结构设计方案。
In view of the new structure of MOA in UHV system, the potential distribution is calculated and studied experimentally. Based on the special structure of MOA, the potential distribution of.MOA without shunt capacitor is calculated by the finite element method, and the MOA with actual shunt capacitor is calculated by the circuit method. This calculation results are close to the measured ones. A 2-Daxisymmetric model of strut surge arrester using the software ANSYS was established to calculate the potential distribution. Various factors of effects on potential distribution of surge arrester were analyzed, and the voltage sharing measure with the voltage deviation of MOA resistor as objective function was discussed. The potential distribution of MOA resistors under the maximum continuous operating voltage was measured by using the optic-electric measuring system. Compared the measured data with calculated result, a structure scheme with optimal potential distribution was obtained at last.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第1期11-15,共5页
High Voltage Engineering
关键词
有限元法
MOA
电位分布
电压偏差
电流分担率
荷电率
finite element method
MOA
potential distribution
voltage deviation
current loading rate
chargeability
