【摘要】 诸多因素造成电力系统机电阻尼削弱,限于模型,以往的分析方法一般侧重于机侧因素的分析,如励磁系统状况等。在源流电气剖分子网络的基础上,建立了包含机网侧影响因素的等效阻尼系数模型。利用该模型定义了子路径阻尼权重分析模型,用以研究影响机组阻尼的关键电气子路径;通过建立子路径电抗阻尼灵敏度及相对相位角阻尼灵敏度模型,分析了网侧子路径参数对机组阻尼的影响。仿真计算结果证明了剖分子网络电气子路径及其参数对阻尼影响的差异性,该研究结果有助于从机侧和网侧采取措施来改善电力系统阻尼特性。更多还原

【Abstract】 Many factors weaken the mechanical-electrical damping of power system.Because of the limit to model,previous analysis usually focused on the influencing factors at generator side,such as the status of excitation system.The equivalent damping coefficient model including the influencing factors at both generator and network sides is established based on the sub-network by source-flow electrical dissecting,with which,the sub-path damping weight analysis model is defined to study the key electrical sub-paths seriously influencing the unit damping.The sub-path reactance damping sensitivity model and the sub-path relative phase angle sensitivity model are established to analyze the influence of sub-path parameters at network side on the unit damping.Simulation results show the differences of influence on damping between sub-networks and their parameters.The research results contribute to taking measures at both generator and network sides to improve the damping characteristics of power system.更多还原