基于最小特征轨迹的电力系统稳定器参数整定方法  

Parameter Tuning Method for Power System Stabilizer Based on Minimum Characteristic Locus

作　　者：许昊 甘德强[1] 黄润 张杰 黄伟 XU Hao;GAN Deqiang;HUANG Run;ZHANG Jie;HUANG Wei(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;Yunnan Electric Power Dispatching and Control Center,Kunming 650011,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]云南电力调度控制中心,云南省昆明市650011

出　　处：《电力系统自动化》2023年第5期134-143,共10页Automation of Electric Power Systems

基　　金：中国南方电网有限责任公司科技项目(YNKJXM20191251)。

摘　　要：电力系统中低频、超低频等振荡的发生会威胁电网的安全稳定运行。电力系统控制器的参数设置直接影响系统低频和超低频振荡等小干扰问题的稳定性。为分析控制器参数对于稳定性的影响,从频域角度提出了一种基于最小特征轨迹的小干扰稳定分析方法。首先,建立转子回路的紧凑形式Heffron-Phillips模型,并根据特征轨迹得到频域稳定裕度表达式;然后,对该稳定裕度进行灵敏度分析,实现了参数对稳定性影响的量化分析。此外,基于该方法对励磁模式进行了分析,并从理论层面解释了电力系统稳定器增益存在上界的原因,同时,给出了励磁模式频率及电力系统稳定器临界增益求解方程。最后,提出了一种控制器参数整定方法,并通过算例验证了所提方法的有效性与实用性。The occurrence of low-frequency and ultra-low-frequency oscillations in power systems will threaten the secure and stable operation of power grids.The parameter setting of the power system controllers directly affects the small-signal stability of low-frequency and ultra-low-frequency oscillations.To analyze the influence of controller parameters on stability,a small-signal stability analysis approach based on the minimum characteristic locus from a frequency-domain perspective is proposed.First,a compact form of the Heffron-Phillips model of the rotor circuit is established,and the stability margin expression in the frequency domain is obtained according to the characteristic locus.Then,the sensitivity analysis of the stability margin is implemented,and the quantitative analysis of the influence of parameters on the stability is realized.In addition,the exciter mode is analyzed and the reason why the PSS gain has the upper bound is explained from the theory aspect based on this method,and the solution equations of the frequency of exciter mode and the critical gain of the power system stabilizer are given.Finally,a controller parameter tuning method is proposed,and the effectiveness and practicability of the proposed method are verified by case studies.

关 键 词：电力系统稳定器 参数整定 最小特征轨迹 灵敏度 频域稳定裕度 励磁模式 

分 类 号：TM712[电气工程—电力系统及自动化]