电力系统自动化2018，Vol.42Issue(9)：44-50,7.DOI:10.7500/AEPS20170815002
强阻尼电压源型虚拟同步发电机大扰动功角稳定性分析
Analysis on Large Disturbance Power-angle Stability of Strong-damping Voltage-source Virtual Synchronous Generators
摘要
Abstract
The virtual synchronous generator(VSG)has similar external characteristics to the synchronous generator(SG). The VSG has the same instability mechanism as the SG under the large disturbance.However,compared with the SG,the inverter of VSG is affected by the current limit,whose power-angle curve is different with SG as well.Meanwhile,the damping coefficient of VSG is much larger than that of SG and the power-angle stability of VSG cannot be easily determined. Considering the integration of the VSG and infinity system,the power-angle curve transformed from saturated current to unsaturated current is described and the strong damping of coefficient characteristic of the VSG is analyzed firstly.Then,the strong time-varying characteristic of VSG systems is illustrated.The method which can judge the stability of the VSG system is put forward.Finally,based on the PSCAD software,the simulation is conducted to verify the reasonability of the method mentioned above.关键词
虚拟同步发电机/功角稳定/强阻尼/时变性Key words
virtual synchronous generator/power-angle stability/strong damping/time-varying characteristic引用本文复制引用
孟志伟,侯玉强,方勇杰,朱玲,杨海洋..强阻尼电压源型虚拟同步发电机大扰动功角稳定性分析[J].电力系统自动化,2018,42(9):44-50,7.基金项目
国家电网公司科技项目"大型能源基地多直流、交直流送出系统网源协同频率稳定控制技术研究".This work is supported by State Grid Corporation of China. （）
