基于能量角度的共振机理电力系统低频振荡分析  

Analysis on Power System Low Frequency Oscillations Originated in Resonance Mechanism from Viewpoint of Energy

作　　者：韩志勇[1] 贺仁睦[1] 徐衍会[1] 沈峰[1] 

机构地区：[1]电力系统保护与动态安全监控教育部重点实验室(华北电力大学),北京市昌平区102206

出　　处：《电网技术》2007年第8期13-16,共4页Power System Technology

基　　金：国家重点基础研究专项经费资助项目(2004CB217901)~~

摘　　要：电力系统共振机理低频振荡,即由于扰动的频率与系统自然振荡频率共振而发生的系统大幅度功率振荡,已被证明可较好地解释实际系统中发生的一些非负阻尼机理功率振荡。作者从能量角度分析了电力系统在发生共振机理低频振荡过程中内、外能量的变化关系和特征。采用仿真软件Matlab对河北南网安保线的功率振荡进行了仿真和能量分析,其结果可更清晰地展示振荡的物理过程,有助于更好地理解和认识电力系统共振机理低频振荡。According to power system resonance mechanism, low frequency high amplitude power oscillation could be triggered off while the frequency of sustained cyclic small disturbance coincides with that of power system natural oscillation. It is proved that above-mentioned mechanism can be used to explain some power oscillations in practical power systems well, which are triggered off by non-negative damping mechanism. From the viewpoint of energy, the features and variation relation between internal and external energy during the low frequency oscillation triggered off by resonance mechanism. By use of Matlab software, the simulation and energy analysis of power oscillation occurred in Anbao transmission line of southern power network in Hebei power grid are carded out, the results of simulation and analysis make the physical process of the oscillation more clear and contribute to understand and recognize power system low frequency oscillation originated in resonance mechanism.

关 键 词：电力系统 低频振荡 共振机理 能量 

分 类 号：TM744[电气工程—电力系统及自动化]