高压换流阀宽频建模方法研究及应用  

Research and Application of High-voltage Converter Valve Broadband Modeling Methods

作　　者：黄莹 史书怀[2] 王文奇 刘宁 

机构地区：[1]南方电网技术研究中心,广东广州510623 [2]西安交通大学电气工程学院,陕西西安710049 [3]西安西电电力系统有限公司,陕西西安710077

出　　处：《电力电子技术》2015年第8期76-79,共4页Power Electronics

摘　　要：通过建立换流阀的宽频电路等效模型,并进行冲击电压下的仿真模拟,研究高压换流阀在承受雷电等过电压冲击时的电压分布特性。首先根据现场测试的换流阀杂散参数,得到其宽频电路等效模型;其次,基于施加雷电冲击的模型,分析影响换流阀过电压分布的主要杂散参数,研究其电压分布。研究表明,变压器及其套管电容是影响换流阀电压分布的关键因素,而对地杂散参数及层间杂散参数对其电压分布的影响较小。Through the establishment of equivalent model of converter valve broadband circuit, this paper conducts the simulation under surge voltages to study the voltage distribution characteristics of converter valve when it bears the thunder and other over-voltage shock.Firstly, according to the converter valve＇ s stray parameters of site survey, the equivalent model of broadband circuit is obtained.Secondly, based on the model of imposing thunder surge voltage, it analyses the main stray parameters which influence the over-voltage distribution of the converter valve to research the voltage distribution.At last, the results show that the transformer and its casing capacitor are the key influence factors to the voltage distribution.The affect of layers and layer-earth stray parameters is smaller to the voltage distribution.

关 键 词：换流阀 过电压分布 宽频等效电路 杂散参数 

分 类 号：TP214[自动化与计算机技术—检测技术与自动化装置]