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| Calculating of Electric Field of Converter Valve Tower by Using Fast Multipole Curved Boundary Element Method |
| Wang Zezhong1, Shi Yuxin1, Liu Liping2 |
1. Beijing Key Laboratory of High Voltage & EMC North China Electric Power University Beijing 102206 China;
2. Electric Power Research Institute Beijing 100192 China |
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Abstract The accurate and rapid calculation of electric field of DC converter valve tower has guiding significance in the design process. However, the structure of tower is complex and large, and the multi-media exists. The numerical analysis has great difficulty. Therefore, the fast multipole curved boundary element method considering multi-media was proposed. Based on the multiple dielectrics boundary integral equation of the electrostatic field, the problem of the multi-media was solved. The fast multipole expansion type for multi-media was proposed. The improved fast multipole method was used to accelerate the curved boundary element method based on coordinate transformation, which improved the calculation accuracy and reduce the computational cost. Compared with different methods, the accuracy and efficiency of the algorithm were verified by the insulator model with corona ring. The effect of insulators on the electric field of fittings as well as the distribution of the voltage and electric field of insulators was analyzed by using converter valve tower model. With this method, the electric field of ±160kV converter valve single bridge model is analyzed. This method is suitable for analyzing the large-scale problem of multi-media coexistence, which is an effective tool for optimizing the design of converter valve tower.
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Received: 24 January 2018
Published: 29 January 2019
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2019, Vol. 34 
