线路避雷器和绝缘子串的伏秒特性配合问题研究

Study on Voltage-time Characteristic Coordination between Line Arrester and Insulator String

给出了金属氧化物避雷器(MOA)相对其它类型避雷器的优点,并就MOA与被保护的绝缘子串之间的配合应用原则进行了论述,分析计算了MOA与绝缘子串两者的伏秒特性。计算结果显示,当MOA与绝缘子串两者进行合理配合应用时,对线路设备保护的有效性超过了99.993%,从而得出在架空输电线路防雷保护中应用MOA以防止过电压效果显著,最后就合理确定MOA的主要技术参数提出了意见。

This paper presents the advantages of metal oxide arrester comparing with other types arrester, and discusses the principle of coordination between MOA and protected insulator string. The result of analyzing the voltage-time characteristics of MOA and insulator string shows the effectiveness of protection by MOA is more than 99.993%. Then, the conclusion is reached that the effect of MOA preventing overvohage is remarkable in overhead power transmission lines. Finally, primary technology parameters of MOA are suggested.