Adaptability Analysis of Impedance Modulus Margin Index for Static Voltage Stability Evaluation of Multi-infeed Renewable Energy Power System

被引：0

作者：

Kong H. ^{[1
]}

Li Y. ^{[1
]}

Zhang Z. ^{[1
]}

Hou S. ^{[1
]}

Zhao Y. ^{[1
]}

Xue A. ^{[1
]}

机构：

[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2024年 / 44卷 / 08期

关键词：

impedance modulus margin index; multi-machine multi-infeed system; phasor measurement unit (PMU); renewable energy power system; static voltage stability;

D O I：

10.13334/j.0258-8013.pcsee.222784

中图分类号：

学科分类号：

摘要：

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. ©2024 Chin.Soc.for Elec.Eng.

引用

页码：3002 / 3015

页数：13

共 40 条

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