大规模互联电网区域间低频振荡实用分析方法  

A Practical Analysis Method of Inter-area Low-frequency Oscillation for Large-scale Interconnected Power Grid

作　　者：姚天亮 杨德洲 徐宏雷 

机构地区：[1]甘肃省电力设计院,甘肃兰州730050 [2]甘肃省电力科学研究院,甘肃兰州730050

出　　处：《四川电力技术》2010年第2期21-23,82,共4页Sichuan Electric Power Technology

摘　　要：结合PSASP小干扰频域分析与发电机功角曲线时域检测,提出一种大规模电力系统低频振荡实用分析方法。4台机算例研究了发电机模型、励磁系统与负荷模型对振荡模式的影响,验证了所提方法的正确性。运用此方法分析大区域互联全国系统,分两步方便快捷地求出了区域间、弱阻尼主导低频振荡模式。弥补了PSASP搜索部分特征值时存在的漏根缺陷,并且能准确评估系统真实阻尼水平。Combining small signal analysis in frequency domain with generator power angle detection in time domain, a practi- cal method of low - frequency oscillation （LFO） analysis in large - scale power systems is proposed. The researches of four machines system reveal the impact of generator model, excitation system and load model on oscillation modes, and it proves the correction of the proposed method. Using this method to analyze the national interconnected power systems, the inter - area weak damping dominant inertial modes are conveniently solved in two steps. And the missing shortcomings when searching some eigenvalues by PSASP are made up, and in the same time the actual damping value of power systems is accurately assessed.

关 键 词：大规模电力系统 区域间低频振荡 经典二阶模型 功角曲线检测 

分 类 号：TM712[电气工程—电力系统及自动化]