摘要
我国电网在大联网中出现了超低频振荡现象,为了分析这种振荡的影响因素,以单机无穷大系统为例,给出火电厂锅炉、汽轮机、调速系统以及发电机、励磁系统的数学模型,推导获得整个系统线性化模型下的系数矩阵,并利用特征值分析法对火电厂动力系统与电力系统超低频振荡的相关性进行了研究。对不同参数情况进行计算分析,结果表明:在超低频段,火电厂动力系统振荡模式与转子振荡模式之间有可能存在弱相关性,所以在超低频振荡分析中需要注意这一问题。
SLFO（Super Low Frequency Oscillations） occurred in the interconnected power system in China. With the single-machine infinite-bus system as background,the detailed models of its parts are given for analyzing the possible effect of thermal energy system on SLFO, involving boiler, steam turbine, speed -governing system,generator and excitation system. The coefficient matrix of linearized system model is deduced and the eigenvalue analysis method is used to study the interaction between thermal energy system and super low frequency oscillation of power system. The caleulative results for different parameters indicate that,the weak relativity may exist between them,which should be considered in the analysis of SLFO.
出处
《电力自动化设备》
EI
CSCD
北大核心
2009年第8期75-78,共4页
Electric Power Automation Equipment
基金
国家杰出青年科学基金项目(50725723)~~
关键词
电力系统
超低频振荡
动力系统
原动系统
特征值
相关性分析
electric power system
super low frequency oscillation
thermal energy system
prime mover
eigenvalue method
relativity analysis
