中国电机工程学报2016，Vol.36Issue(22)：6013-6027,15.DOI:10.13334/j.0258-8013.pcsee.161682
电力电子多馈入电力系统的广义短路比
Generalized Short Circuit Ratio for Multi Power Electronic Based Devices Infeed to Power Systems
摘要
Abstract
More and more renewable energy generators and var compensation devices are connected to AC power systems via power electronic devices, which makes the AC systems weaker and weaker, so it is important to exactly measure the strength of AC systems and analyze the potential stability problems of multiple power electronic based devices infeed systems (MPEIS). Firstly, this paper deduced the explicit characteristic function of short circuit ratio (SCR) and analyzed the relationship between the SCR and small signal stability problem. Secondly, based on the ideal model of MPEIS, the dynamic characteristics of multi infeed system were represented byn independent single infeed systems, thus the multi-infeed system can be decomposed into several single infeed systems. Finally, a new concept named generalized short circuit ratio (gSCR) was proposed to analyze the small signal stability of multi infeed system, which can be used to depict the strength of AC systems and unify the concept of SCR in single and multi-infeed system physically and mathematically. The simulation results demonstrate the rationality and effectiveness of the defined gSCR.关键词
电力电子多馈入电力系统/系统解耦/广义短路比/小干扰稳定性/交流电网强度Key words
multi power electronic based devices infeed systems/system decoupling/generalized short circuit ratio (gSCR)/small signal stability/AC system strength分类
信息技术与安全科学引用本文复制引用
辛焕海,董炜,袁小明,甘德强,王康,谢欢..电力电子多馈入电力系统的广义短路比[J].中国电机工程学报,2016,36(22):6013-6027,15.基金项目
国家自然科学基金项目(51577168)。Project Supported by National Natural Science Foundation of China (51577168) （51577168）
