中国电机工程学报2016，Vol.36Issue(4)：927-936,1203,11.DOI:10.13334/j.0258-8013.pcsee.2016.04.005
直流微电网稳定性分析及阻尼控制方法研究
Stability Analysis and Research of Active Damping Method for DC Microgrids
摘要
Abstract
This paper focused on a DC microgrid with droop control structure. The small-signal models had been derived in thes plane. Eigenvalue analysis results revealed the relationship between system stability and the parameters of DC system, such as DC load power, the type of DC load and the droop gains. It shows that when the converter adopts the detailed modeling, the poorly damped LC filter in DC microgrid, which consists of the capacitor of converter and equivalent reactance of connecting cable, will have interaction with the output impedance of converter and may reduce the system damping and bring in unstable high-frequency oscillations. Based on the impedance ratio type criterions, a low-pass-based active damping method was proposed to change the original unstable root locus and overcome the unstable oscillations by reshaping the equivalent output impedance of DC-DC converters. Simulation and experimental results were carried out to confirm the validity of the proposed approach.关键词
直流微电网/下垂控制/稳定性分析/高频谐振/有源阻尼方法Key words
DC microgrid/droop control/stability analysis/high-frequency oscillations/active damping method分类
信息技术与安全科学引用本文复制引用
郭力,冯怿彬,李霞林,王成山,李运帷..直流微电网稳定性分析及阻尼控制方法研究[J].中国电机工程学报,2016,36(4):927-936,1203,11.基金项目
国家863高技术基金项目(2015AA050104) （2015AA050104）
国家自然科学基金项目(51507109) （51507109）
天津市科技支撑计划重点资助项目(14ZCZDGX00035).The National High Technology Research and Development of China 863 Program (2015AA050104) （14ZCZDGX00035）
Project Supported by National Natural Science Foundation of China (51507109) （51507109）
Supported by Tianjin Municipal Science and Technology Commission (14ZCZDGX00035). （14ZCZDGX00035）
