电力建设2026，Vol.47Issue(5)：39-48,10.DOI:10.12204/j.issn.1000-7229.2026.05.004
分频输电系统静态电压稳定性分析
Analysis of Static Voltage Stability in Fractional Frequency Transmission Systems
摘要
Abstract
[Objective]This paper systematically analyzes the static voltage stability and power limit characteristics of the fractional frequency transmission system(FFTS),exploring the variation laws and intrinsic mechanisms under varying frequencies and topological structures.[Methods]Based on the mechanism of static voltage stability and the continuation power flow method,the advantages of FFTS in static voltage stability are identified.The investigation reveals that the power limit shows both monotonic and non-monotonic trends as frequency decreases,depending on the network topology.Furthermore,the active power limit expression is derived based on the Thevenin equivalent circuit to elucidate the causes of non-monotonic variations.[Results]For a given topology,the static voltage stability of an FFTS is superior to that of the power system operating at power frequency.However,in specific topologies,the active power limit presents a non-monotonic characteristic of"increase-then-decrease"as frequency declines.This phenomenon originates from the coupling effect between the phase angle of the PV node and the system reactance.When this coupling effect does not affect the power limit,the power limit varies monotonically.[Conclusions]While FFTS offers significant advantages for static voltage stability,its power limits are highly sensitive to topological configurations.Consequently,system parameters must be carefully configured during the design phase.关键词
分频输电系统/静态电压稳定性/连续潮流法/功率极限Key words
fractional frequency transmission system/static voltage stability/continuation power flow method/power limit分类
信息技术与安全科学引用本文复制引用
张海涛,杨可俊,李保全,张思琪,赵晨婷,魏亦铭,王秀丽,王锡凡..分频输电系统静态电压稳定性分析[J].电力建设,2026,47(5):39-48,10.基金项目
This work is supported by National Natural Science Foundation Youth Fund of China(No.52207137)and the State Grid Jibei Electric Power Co.,Ltd.Science and Technology Project(No.B3018K25Z009). 国家自然科学基金青年科学基金项目(52207137) （No.52207137）
国网冀北电力有限公司科技项目(B3018K25Z009) （B3018K25Z009）
