Application of Excitation Function to the Prediction of RI Level Caused by Corona Discharge  

作　　者：ZHU Lingyu JI Shengchang HUI Sisi GUO Jun LI Yansong FU Chenzhao 

机构地区：[1]The State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China [2]Shanxi Electric Power Corporation, Taiyuan 030001, China [3]Electric Power Research Institute, SMEPC, Shanghai 200437, China

出　　处：《Plasma Science and Technology》2012年第12期1091-1096,共6页等离子体科学和技术（英文版）

基　　金：supported by National High Technology Research and Development Program of China （No. 2008AA04Z408）

摘　　要：Radio interference （RI）, as an aftereffect of corona discharge, is an important research topic in the field of electromagnetic compatibility, where excitation function is applied broadly to the prediction of RI level. This paper presents the theory of excitation function method used in the RI level prediction. Then, some practical problems related to this method are discussed. The propagation procedure of corona current is solved by the phase-modal transformation, and the impedance matrix of multi transmission lines is calculated by a double logarithmic approximate model of Carson＇s Ground-Return impedance. At the same time, in order to calculate the RI level when total line corona is assumed, an analytical formula is deduced for integral operation. Based on the above solutions, an algorithm is presented and applied to the prediction of RI level of a practical overhead transmission line. Comparison of prediction and measurement results indicates that the algorithm proposed in this paper is effective and feasible.Radio interference （RI）, as an aftereffect of corona discharge, is an important research topic in the field of electromagnetic compatibility, where excitation function is applied broadly to the prediction of RI level. This paper presents the theory of excitation function method used in the RI level prediction. Then, some practical problems related to this method are discussed. The propagation procedure of corona current is solved by the phase-modal transformation, and the impedance matrix of multi transmission lines is calculated by a double logarithmic approximate model of Carson＇s Ground-Return impedance. At the same time, in order to calculate the RI level when total line corona is assumed, an analytical formula is deduced for integral operation. Based on the above solutions, an algorithm is presented and applied to the prediction of RI level of a practical overhead transmission line. Comparison of prediction and measurement results indicates that the algorithm proposed in this paper is effective and feasible.

关 键 词：radio interference excitation function modal propagation Ground-Return impedance 

分 类 号：TN821.6[电子电信—信息与通信工程] X701