电力系统自动化2017，Vol.41Issue(12)：56-62,99,8.DOI:10.7500/AEPS20170125007
提高下垂控制逆变器虚拟功角暂态稳定性的控制方法
Control Methods to Improve Virtual Power Angle Transient Stability of Droop-Controlled Inverters
摘要
Abstract
Like synchronous generators, transient instability also occurs to droop-controlled inverters when subjected to large disturbances.Owing to the current limitation, the voltage loop of the inverter is out of work during the disturbance and the inverter turns to operating in the current source mode.The mechanism of the virtual power angle curves deviating during the transient process because of the limited voltage tracking performance, which reduces the stability margin, is further analyzed.To this end, a current feed-forward control method based on estimating the output current is proposed to improve the voltage tracking performance so that the transient stability is improved.Besides, to deal with the loss of equilibrium points during the transient process, a transient synchronous control method is proposed.It helps the inverter to reach a proper equilibrium point when the voltage loop is out of commission and prevents the inverter from transient instability.Finally, simulations on a single-machine-infinite-bus system verify the effectiveness of the proposed control methods.关键词
逆变器/虚拟功角/暂态稳定/电流限幅/电流前馈控制/下垂控制Key words
inverter/virtual power angle/transient stability/current limiting/current feed-forward control/droop control引用本文复制引用
章雷其,黄林彬,黄伟,辛焕海,胡家兵..提高下垂控制逆变器虚拟功角暂态稳定性的控制方法[J].电力系统自动化,2017,41(12):56-62,99,8.基金项目
国家重点研发计划资助项目(2016YFB0900104) （2016YFB0900104）
国家自然科学基金资助项目(51577168) （51577168）
云南电网科技项目(yndw(2016)000303DD00124).This work is jointly supported by the National Key Research and Development Program (No.2016YFB0900104), National Natural Science Foundation of China (No.51577168), and Yunnan Electric Power Company (No.yndw (2016) 000303DD00124). （yndw(2016）
