中国电机工程学报2024，Vol.44Issue(8)：3002-3015,中插6,15.DOI:10.13334/j.0258-8013.pcsee.222784
阻抗模裕度指标在新能源多馈入系统静态电压稳定评估的适应性分析
Adaptability Analysis of Impedance Modulus Margin Index for Static Voltage Stability Evaluation of Multi-infeed Renewable Energy Power System
摘要
Abstract
Most centralized renewable energy stations(RES)are located at the end of the power grid.With the increase of active power generation,static voltage instability problem may occur.In this paper,the application object of the traditional impedance modulus index is extended from the load to the RES,which enriches the applicability scenarios of this index for static voltage stability evaluation,including the renewable energy system with reactive power compensation,the renewable energy cluster feeding system,and the renewable energy multi-machine multi-infeed system.Specifically,the critical static voltage stability conditions of the new energy in the single-machine single-infeed system(SMSIS)are analyzed,and based on this,the impedance mode margin index and stability criterion to evaluate the voltage stability of RES are given.Then,by merging the compensation equipment into the system impedance,the influence of reactive power compensation on the index is analyzed.Furthermore,it is proved that in the renewable energy cluster feeding system,voltage instability at the point of common coupling(PCC)will occur before a single RES;thus,the PCC is determined as the calculation node of the index.After that,in order to consider the impact between different RES in the multi-machine multi-infeed system(MMMIS),in the calculation process of the index,the RES to be evaluated are reserved.The other RES are equivalent to negative impedance to be merged into the node impedance matrix,which realizes the extended application in MMMIS.Finally,based on the MMMIS and actual large power grid system established in PSD-BPA,the validity of the index is verified and compared with the existing methods.关键词
新能源电力系统/静态电压稳定/阻抗模裕度指标/相量测量单元/多机多馈入系统Key words
renewable energy power system/static voltage stability/impedance modulus margin index/phasor measurement unit(PMU)/multi-machine multi-infeed system分类
信息技术与安全科学引用本文复制引用
孔贺,李业成,张哲,侯山,赵弋菡,薛安成..阻抗模裕度指标在新能源多馈入系统静态电压稳定评估的适应性分析[J].中国电机工程学报,2024,44(8):3002-3015,中插6,15.基金项目
国家杰出青年基金项目(51725702). Project Supported by National Science Fund for Distinguished Young Scholars(51725702). （51725702）
