摘要
为探究频率动态与功角振荡间的耦合特性,文中以双机系统为例推导扰动后系统稳定电网频率动态特性和功角振荡机理,基于扩展等面积准则(extended equal area criterion,EEAC)扩展至多机系统,提出了基于Pearson系数的耦合强度量化评估指标,根据频率动态特征和功角振荡特征对耦合关系进行量化。文中分析了功角振荡对频率动态特征指标的影响,量化评估了不同频率动态指标与功角振荡指标的耦合强度。理论分析和算例结果表明构建的指标体系具有合理性,电力系统的频率动态与功角振荡相互耦合,为频率和功角的优化控制措施提供了参考。
For the analysis of the coupling characteristics of the power system frequency dynamic and power angle oscillation,the mechanism of the two-machine system under disturbances is derived in this paper,and the mechanism of the multi-machine system is obtained based on the extended equal area criterion(EEAC).A quantitative assessment index is proposed based on the Pearson coefficient,which quantified the coupling according to the characteristics of frequency dynamics and power angle oscillation.The influence of power angle oscillation on the frequency dynamic indices is analyzed,and the coupling degrees of between the power angle oscillation and different frequency dynamic indices are assessed quantitatively.The results of the mechanism analysis and case study verify the proposed quantitative indices and show the coupling characteristics of the power system frequency dynamic and power angle oscillation,which provided guidance for optimal frequency and power angle control.
作者
马睿聪
刘福锁
曹永吉
王超
张恒旭
李威
MA Ruicong;LIU Fusuo;CAO Yongji;WANG Chao;ZHANG Hengxu;LI Wei(Shandong University(Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education),Jinan 250061,China;State Key Laboratory of Smart Grid Protection and Control,Nanjing 211106,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;Academy of Intelligent Innovation,Shandong University,Jinan 250101,China)
出处
《电力工程技术》
北大核心
2023年第4期102-112,共11页
Electric Power Engineering Technology
基金
国家自然科学基金资助项目(52177096)
国家电网有限公司科技项目(5100-202140342A-0-0-00)。
关键词
频率动态
功角振荡
耦合特性
量化分析
频率稳定
同步稳定
frequency dynamic
power-angle oscillation
coupling characteristic
quantitative analysis
frequency stability
synchronous stability
