电力系统及其自动化学报2017，Vol.29Issue(6)：13-20,8.DOI:10.3969/j.issn.1003-8930.2017.06.003
基于阻尼转矩分析法的光伏发电系统小信号建模分析
Small-signal Stability Analysis of Photovoltaic Power Generation System Based on Damping Torque Analysis Method
摘要
Abstract
The dynamic characteristic of photovoltaic(PV)power generation is the key to the analysis of its impact on power system. The conventional damping torque analysis(DTA)is carried out to study the generation mechanism of damping based on a small-signal model of PV generation. Furthermore,the judging criteria for the nature of reactive cur-rent inner loop pattern is derived,and how the characteristic patterns of the system vary with parameters is analyzed based on eigenvalue trajectory,thus the optimal system parameters are designed accordingly. It is shown that electric damping,which is similar to the dynamic damping of synchronous generator,leads to the damping of PV generation. The equivalent damping coefficient,equivalent synchronous coefficient,and the coupling relationship among state vari-ables determine the nature of the pattern. The system damping can be intensified with the selection of optimal parame-ters by DTA,which can further improve the transient performance of the system.关键词
光伏发电系统/小信号建模/特征分析/阻尼转矩分析/特征值轨迹Key words
photovoltaic(PV)power generation/small-signal model/eigenvalue analysis/damping torque analysis (DTA)/eigenvalue trajectory分类
信息技术与安全科学引用本文复制引用
李培强,胡泽,李欣然,曾小军,邱时严,周丽英..基于阻尼转矩分析法的光伏发电系统小信号建模分析[J].电力系统及其自动化学报,2017,29(6):13-20,8.基金项目
国家自然科学基金资助项目(51277055) （51277055）
国家重点基础研究发展计划(973计划)资助项目(2012CB215106) （973计划）
