110kV零值瓷绝缘子电场仿真分析研究

Analysis and Research on Electric Field Simulation of 110 kV Zero-value Insulator

瓷绝缘子长期运行后其绝缘性能和机械性能下降,容易产生零值、低值绝缘子,严重时会导致输电线路外绝缘发生闪络,发生电网停电事故。利用相关仿真分析软件,对110 kV直线猫头塔绝缘子上的无零值绝缘子和不同部位劣化绝缘子进行钢脚和铁帽的电位自由度耦合,以模拟在实际情况下的零值绝缘子,通过在电位分布云图、等位线分布图、电场分布云图、电位分布和电场分布曲线等方面的对比分析,分析不同部位零值绝缘子对绝缘子串空间电场分布特性的影响,对绝缘子劣质绝缘子的检测提供一定的理论支撑。

The insulating properties and mechanical performance of porcelain insulators are easy to be deteriorated after a long - term operation, which produces low - value or zero - value insulators. A serious grid blackout would happen when the flash- over occurs in the transmission line. With the relevant simulation analysis software, the potential coupling freedom of steel foot and gossan is simulated for the nonzero value insulator and the faulty insulator in different part. The cloud chart of potential distribution, the distribution of equipotential lines, the cloud chart of electric field distribution, and the curves of potential distribution and electric field distribution are compared and analyzed. The influences of the zero - value insulator in different parts on the distribution characteristics of space electric field of insulator string are analyzed, which provides some theoretical support for the faulty insulator detection.