高压直流输电中混合谐振型谐波不稳定分析  

Analysis on composite resonant instability for HVDC power transmission systems

作　　者：陈宝亮[1] 李兴源[1] 穆子龙[1] 王曦[1] 应大力[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《电力系统保护与控制》2012年第14期81-85,共5页Power System Protection and Control

基　　金：国家自然科学基金重点项目(51037003)~~

摘　　要：高压直流输电中交流侧二次谐波分量和直流侧基频分量通过换流器相互调制形成混合谐振,从而使换流变压器铁芯饱和并最终导致混合谐振型谐波不稳定。研究了混合谐振型不稳定产生的机理,并采用仿真方法求取换流器两侧谐波关系的矩阵参数,然后推导了混合谐振型不稳定判据。最后采用PSCAD/EMTDC自建电磁暂态仿真模型,对自发式混合谐振型不稳定进行了仿真研究,验证了混合谐振型不稳定判据的有效性。The composite resonance is formed by the intermodulation between the secondary harmonic component on the AC side and the fundamental frequency component on the DC side via the converters. It can lead to converter transformer core saturation and result in composite resonant harmonic instability. The generation mechanism of composite resonant harmonic instability is researched, simulation method is used to obtain the matrix, and composite resonant instability criterion is derived. The electromagnetic transient simulation model is built by use of software package PSCAD/EMTDC, and the spontaneous harmonic instability caused by composite resonance is researched. Simulation results verify the effectiveness of composite resonant instability criterion. This work is supported by National Natural Science Foundation of China （No. 51037003）.

关 键 词：混合谐振 谐波不稳定 高压直流输电 电磁暂态仿真 

分 类 号：TM711[电气工程—电力系统及自动化]