一种消除Deutsch假设的高精度迭代特征线方法求解高压直流输电线路离子流场  

A High-Accuracy Iterative Method of Characteristics without Deutsch Assumption for Calculating Ion-Flow Field of HVDC Overhead Lines

作　　者：乔骥[1] 徐志威 邹军[1] 袁建生[1] Qiao Ji;Xu Zhiwei;Zou Jun;Yuan Jiansheng(State Key Lab of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing 100084 China;Henan Electric Power Survey&Design Institute Zhengzhou 450007 China)

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京100084 [2]河南省电力勘测设计院,郑州450007

出　　处：《电工技术学报》2018年第19期4419-4425,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上项目(51577103);电网环境保护国家重点实验室开放基金(GYW51201700589)

摘　　要：通量线法是求解直流线路离子流问题广泛应用的一种方法,其计算误差主要来自Deutsch假设。该文基于通量线(或称特征线)基本理论,提出一种高精度迭代特征线法。通过迭代计算,在每一步采用新的电场分布重新绘制特征线,逐步修正特征线的方向,从而使特征线法不再依赖于Deutsch假设。结果表明,与传统通量线法相比,迭代特征线方法在求解地面电场与离子、空间离子流分布、通量守恒性及电晕损耗方面均有明显改善。另外,还对两种传统通量线法边界条件的施加方式进行了误差比较与讨论。The flux tracing method is frequently applied for predicting the ion flow field of HVDC transmission lines,the error of which is mainly caused by Deutsch assumption.In this paper,a new iterative method of characteristics is proposed based on the methodology of flux lines(or characteristic lines).The directions of the characteristic lines are modified in the iterations using the updated electric field.Thus Deutsch assumption is not made for the proposed method.Results show that the present method has a better performance on the ground-level electric field and ion density,space charge distribution,flux conservation law and power losses.In addition,errors using two types of boundary conditions are compared and analyzed.

关 键 词：离子流 合成电场 高压直流输电线路 Deutsch假设 迭代特征线法 

分 类 号：TM15[电气工程—电工理论与新技术]