金属氧化物避雷器额定电压及持续运行电压取值的研究

Determination of Voltage Rating and Continuous Operating Voltage for Gapless MOA

以ＩＥＣ９９ —４ 验证金属氧化物避雷器（ ＭＯＡ） 额定电压ＵＲ、持续运行电压ＵＣ 的动作负载试验规定为依据，讨论ＭＯＡ 选型中ＵＲ、ＵＣ 取值问题，提出２２０ ｋＶ 及以下电网ＭＯＡ 的ＵＲ、ＵＣ取值，分析它们应用于工程的可行性。指出正确理解和合理选取ＵＲ、ＵＣ 值，可促进ＭＯＡ 制造水平提高，使电网受益增加。

Based on the regulation of MOA duty test on rated voltage U R and continuous operating voltage U C in IEC 99—4, this paper discusses the selection of U R、R C, proposes the U R、U C values for 220 kV and below networks and analyzes the possibitity of power system application. It is pointed out that reasonable selection of U R、U C can improve the manufacture level and beneficial to power networks.