基于混合式阀片的新型过电压防护装置的仿真研究

Simulation study of new overvoltage protection device based on hybrid valve plate

碳化硅(SiC)避雷器和氧化锌(ZnO)避雷器是过电压防护的主要设备.本文分析了基于SiC及ZnO混合式阀片的新型过电压防护装置及其阀片的组合方法;通过电磁暂态仿真软件模拟实际变电站中可能出现的雷击事故,分析SiC避雷器、ZnO避雷器及新型过电压防护装置的电压、电流特性,并对3种避雷器所吸收的能量以及温升进行综合对比.仿真结果证明,新型过电压防护装置的性能优于SiC避雷器和ZnO避雷器.

Silicon carbide (SiC) arrester and zinc oxide (ZnO) arrester are the main equipment for overvoltage protection. In this paper, a new type of overvoltage protection device based on SiC and ZnO valve plates and its combination method were analyzed. power system computer aided design (PSCAD) simulation software was used to simulate the possible lightning accidents in the actual substation. The characteristics of voltage and current on SiC arrester, ZnO arrester and the new type of over voltage protection device were analyzed. The energy and temperature rise absorbed by the three types of arresters were comprehensively compared. The simulation results showed that the performance of the new over voltage protection device was better than that of SiC arrester and ZnO arrester.