基于观测器信号灵敏度差异化设计的强迫振荡扰动源定位  

Location of Forced Oscillation Source Based on Differentiated Design of Observer Signal Sensitivity

作　　者：栾某德 甘德强[1] 李尚远 LUAN Moude;GAN Deqiang;LI Shangyuan(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;National Electric Power Dispatching and Control Center of State Grid Corporation of China,Beijing 100031,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]国家电网有限公司国家电力调度控制中心,北京市100031

出　　处：《电力系统自动化》2021年第22期95-104,共10页Automation of Electric Power Systems

基　　金：国家电网有限公司科技项目(大规模新能源接入对电网低频振荡影响机理研究,4000-202055042A-0-0-00)。

摘　　要：强迫振荡主要由发电机侧的扰动源引起,解决强迫振荡的根本途径为定位扰动源发电机并切除。文中提出基于观测器信号的灵敏度差异化设计法进行扰动源定位,利用广义KYP引理并根据传递函数矩阵的H_(-)/H_(∞)范数特性,给出观测器残差信号对发电机内、外扰动源满足不同灵敏度分配的不等式约束。通过线性矩阵不等式合理优化和搜寻观测器的反馈矩阵,使得观测器残差信号对发电机内部扰动源在有较高灵敏度的同时,对发电机外部的来自电网的强迫振荡不灵敏(解耦),从而根据不同发电机的观测器残差的频谱定位扰动源发电机。10机39节点系统算例和华北电网算例验证了定位方法的有效性、直观性和鲁棒性。Forced oscillations are mainly caused by oscillation sources of generators.The fundamental way to eliminate the forced oscillation is to locate the oscillation source generator and remove it.A method based on differentiated design of observer signal sensitivity is proposed to locate the oscillation source.According to the H_(-)/H_(∞) norm of the transfer function matrix,the inequality constraints are given which assign different sensitivities of observer residual signal to oscillation sources inside and outside the generator using the generalized KYP lemma.Linear matrix inequality is used to optimize and search the feedback matrix of the observer,so that the observer residual signal is sensitive to the oscillation sources inside the generator while insensitive to the forced oscillation sources from the power grid outside the generator.The oscillation source generator could then be located according to the spectrums of the observer residuals of different generators.The demonstrative examples of a 39-bus system and the North China Power Grid show the effectiveness,intuitiveness and robustness of the location method.

关 键 词：强迫振荡 观测器 灵敏度 线性矩阵不等式 

分 类 号：TM712[电气工程—电力系统及自动化]