不同试验方式下的ZnO避雷器的响应特性研究

Study on the Response Characteristics of ZnO Arrester under Different Test Duties

为抑制电网中各种过电压产生的危害,Zn O压敏电阻的金属氧化物避雷器作为最核心元件已广泛应用到现代电力系统中,阀片的性能直接决定避雷器的过电压保护水平,而避雷器的过电压保护水平又直接决定了输变电设备的绝缘水平。通过避雷器测过电压可得到精确的过电压水平,从而显著减小各种电力设备的尺寸,降低其制造难度和成本,对于整个电力系统具有重要的技术和经济价值。通过ATP-EMTP电磁暂态仿真软件和试验对Zn O避雷器阀片的响应特性研究,得到不同方式下的响应特性,可以为实际工程中避雷器监测过电压的选型提供参考。

To suppress the damage of various overvoltages in power grid, ZnO varistor metal oxide arrester as the core element has been widely used in modern power system, the performance of the valve plates directly determines the arrester overvoltage protection level, and overvoltage protection level di- rectly determines the insulation level of power transmission and transformation equipment. Accurate over- voltage level can be measured by arrester, thus not only the size of the various power equipment but also the manufacturing difficulty and cost can be significantly reduced, its application has important technical and economic value for the whole power system. Researching on the response characteristics of ZnO arrester valve plates through the ATP - EMTP electromagnetic transient simulation software and test, the response characteristics of different ways can be got, and reference proposal about the selection of arrester monitoring overvohage can be used in practical engineering.