摘要
随着电压等级的不断升高,无间隙MOA各电阻片对地的杂散电容对其运行电压下的电位分布的影响也不断增大。对MOA的电位分析尤其是试验分析在生产实践中就显得尤其重要。笔者采用试验的方法对750 kV交流系统用MOA的电位分布进行分析。首先,介绍了自主研发的光纤测量系统,该系统由电流传感器、光纤、信号处理单元和计算机4部分组成。经过实验室校正取得了良好的结果,完全能满足工程需要。接下来,采用该测量系统对750 kV交流系统用MOA在运行电压下进行试验,取得了电流分布图,经过简单的处理,转换为电位分布图。最后,采用有限元分析软件ANSYS进行理论计算,将实测结果与计算结果进行比较,二者在反映电位分布趋势上取得了良好的一致性,证明了该试验方法的有效性。
At high voltage level, the stray capacitance between earth and resistance ship of seamless MOA imposes significant effect on the potential distribution of the MOA. This paper experimentally analyzes the potential distribution of an MOA for 750 kV alternating-current system by adopting the optical fiber measurement system developed by the authors. This measurement system is composed of electric current sensor, optical fiber, signal processing unit and computer. With the system an MOA for 750 kV alternating-current system is tested under operation voltage, and the current distribution diagram is obtained. The current distribution diagram is then transformed into potential distribution one through simple process. The measured potential distribution shows a good consistency with the theoretical one from the finite element analysis software ANSYS, which verifies the validity of this optical fiber measurement system.
出处
《高压电器》
CAS
CSCD
北大核心
2010年第4期74-76,80,共4页
High Voltage Apparatus
关键词
金属氧化物避雷器
电位分布
杂散电容
测量系统
有限元
MOA
potential distribution
stray capacitance
measuring system
finite element analysis
