基于相轨迹的机组阻尼系数最小二乘量化方法  

Least-squares Quantization of Unit Damping Coefficients Based on Phase Trajectories

作　　者：郭岐 陆雪顶 王光政 GUO Qi;LU Xue-ding;WANG Guang-zheng(School of Electric Power,North China University of Water Resources and Electric Power,Zhengzhou 450045,Henan Province,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China)

机构地区：[1]华北水利水电大学电力学院,河南郑州450045 [2]华中科技大学土木与水利工程学院,湖北武汉430074

出　　处：《中国农村水利水电》2023年第2期233-238,共6页China Rural Water and Hydropower

基　　金：中央高校基本科研业务费资助项目HUST(2021JYCXJJ043)。

摘　　要：水电机组的负阻尼特性是诱发水电主导电力系统超低频振荡的内在原因,准确高效地量化机组的阻尼系数对超低频振荡主导机组的定位与控制至关重要。针对现有非线性系统机组阻尼量化方法难以兼顾操作简便性与计算准确性的问题,依据阻尼转矩理论分析单机和多机系统的阻尼特性,提出了一种新的阻尼系数快速量化方法,一方面将阻尼的量化结果与理论值对比验证方法的计算精度,另一方面利用多机系统超低频振荡实验分析与实际电站的测量数据计算验证方法的有效性。结果表明方法准确、简单,可为强非线性系统的阻尼研究与超低频振荡时机组阻尼的在线评估提供有效的技术手段。The negative damping characteristics of hydropower units are the intrinsic cause that induces ultra-low frequency oscillations of hydropower dominant power systems. Accurate and efficient quantification of the damping coefficients of units is crucial to the positioning and control of the dominant units of ultra-low frequency oscillations. To address the problem that the existing damping quantization methods for nonlinear system units are difficult to balance the operational simplicity and calculation accuracy, this paper analyzes the damping characteristics of single and multi-machine systems based on the damping torque theory and proposes a novel fast quantization method for damping coefficients. On the one hand, the quantified results of damping are compared with the theoretical values to verify the calculation accuracy of the method. On the other hand, the experimental analysis of ultra-low frequency oscillation of a multi-machine system and the measurement data of actual power stations are used to verify the validity of the method.The results show that the method is accurate and simple, and it can provide an effective technical means for the damping study of strongly nonlinear systems and the online evaluation of the damping in ultralow frequency oscillations.

关 键 词：阻尼转矩 快速量化 超低频振荡 在线评估 

分 类 号：TV736[水利工程—水利水电工程]