高电压技术2017，Vol.43Issue(4)：1095-1105,11.DOI:10.13336/j.1003-6520.hve.20170328005
联接含惯量交流系统的VSC-HVDC系统特性分析
Analysis on Characteristics of VSC-HVDC System Connected to AC System with Inertia
摘要
Abstract
Research on control characteristics of voltage source converter--high voltage direct current (VSC-HVDC) system is currently limited to the connection to the equivalent AC grid,thus,the model of VSC system connected to AC system with inertia should be established,and the analysis on interaction between intemal characteristics of AC system and VSC is of important significance.Firstly,we used a synchronous generator (SG) to simulate the AC system with inertia so as to propose a small signal model of VSC system connected to synchronous generator,and verified the validity of the established model.Secondly,we analyzed the degree of correlation between eigenvalues and state variables with participation factor method.Thirdly,combining with eigenvalue analysis and simulation,we studied the influences of parameters on the characteristic roots of the system,respectively,such as the transmission line,inertia constant of synchronous generator,and damping coefficient.Finally,we analyzed the influences of VSC controller parameters on the stability of the system.The results have proved that the small signal stability of the system will decrease with the decrease of short circuit ratio(SCR) and the decrease of impedance angle of line.When the inertia constant is greater than 1.2 s,the small signal stability of system will enhance and then decrease but will not lose stability.When the damping coefficient of SG ranges from 0～0.5 pu,the small signal stability of system will enhance and then decrease,and the controller parameters also affect the small signal stability of system,so stability will be optimized by adjusting these types of parameters within limits.关键词
弱交流电网/电压源型变换器/同步发电机/特征值分析/系统稳定性Key words
weak AC grid/voltage source converter/synchronous generator/eigenvalue analysis/system stability引用本文复制引用
赵成勇,袁艺嘉,苑宾,李探,李承昱..联接含惯量交流系统的VSC-HVDC系统特性分析[J].高电压技术,2017,43(4):1095-1105,11.基金项目
国家自然科学基金面上项目(51177042) （51177042）
中央高校基本科研业务专项资金(2015XS08).Project supported by National Natural Science Foundation of China (51177042),the Fundamental Research Funds for the Central Universities (2015XS08). （2015XS08）
