电气传动2019，Vol.49Issue(9)：12-15,21,5.DOI:10.19457/j.1001-2095.dqcd18876
阻抗法在多变流器并联系统稳定性分析中的应用
Impedance-based Method Used for Stability Analysis of Multi-paralleled Converter System
摘要
Abstract
With the widely use of the grid-connected converter,it is important to analyze the stability of the paralleled converter system. Firstly,the Norton equivalent circuit of the single grid-connected converter was built,and the output impedance of the converter was defined according to the Norton equivalent circuit. Moreover,the critical value of the grid impedance for the stable multi-paralleled converter system and the oscillation frequency for the unstable system were analyzed based on the impedance method. The results show that owing to the impedance-based analysis method,the whole complex paralleled converter system can be partitioned into some independent subsystems for modeling. The impedance-based analysis method simplifies the stability analysis of the multi-paralleled converter system,and it can accurately calculate the parameters′critical value for the stable system and the unstable-oscillation frequency. Finally,the simulation model of the multi-paralleled converter system was built in PLECS platform and the simulation results verify the correctness of the theoretical analysis.关键词
多变流器并联系统/极点分布/稳定性分析/诺顿等效模型/输出阻抗Key words
multi-paralleled converter system/poles distribution/stability analysis/Norton equivalent model/output impedance分类
信息技术与安全科学引用本文复制引用
张新闻,杨树德,王君瑞,李学生..阻抗法在多变流器并联系统稳定性分析中的应用[J].电气传动,2019,49(9):12-15,21,5.基金项目
国家自然科学基金(51867001) （51867001）
宁夏自然科学研究基金(NZ17107) （NZ17107）
宁夏产学研联合培养项目(YSD201607) （YSD201607）
