Analysis and Improvement of Potential Distribution of 1000-kV Ultra-High-Voltage Metal-Oxide Arrester

作者：He, Jinliang^*; Hu, Jun; Gu, Shanqiang; Zhang, Bo; Zeng, Rong

来源：IEEE Transactions on Power Delivery, 2009, 24(3): 1225-1233.

DOI：10.1109/TPWRD.2009.2014034

• Circuit analysis
• finite-element method (FEM)
• metal-oxide arrester
• parallel capacitor
• photoelectricity measurement method
• potential distribution
• ultra-high voltage (UHV)

This paper presents the study on the potential distribution of the ac 1000-kV ultra-high voltage metal-oxide arrester (MOA). Based on the idea of field-circuit combination, the 3-D finite-element method (FEM) and circuit-analytic method are applied to analyze and improve the potential distribution of the 1000-kV MOA. The 3-D FEM is used to obtain the 1000-kV MOA's potential distribution and stray capacitances to build the equivalent circuit of the MOA. With the equivalent circuit, the method to improve the potential distribution of the MOA by adding parallel capacitors is analyzed. A scheme to obtain the recommended values of parallel capacitors is achieved to improve the potential distribution coefficient within +/- 5%. In addition, the influences of the grading ring and mounting height of the MOA on the potential distribution are also discussed. The potential distribution of the developed 1000-kV surge arrester was tested by the photoelectricity measurement method, which is close to the analysis results.

• 出版日期2009-7
• 单位清华大学