基于扩展等面积定则的含大规模风电场电力系统暂态稳定性分析  

Analysis of transient stability of power system including large scale wind power based on the extended equal area rule

作　　者：林俐 杨以涵 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206

出　　处：《电力系统保护与控制》2012年第12期105-110,115,共7页Power System Protection and Control

基　　金：国家自然科学基金重大项目(51190103);国家高技术研究发展计划(863计划)(2011AA05A104)~~

摘　　要：当风电大容量、集中、多点并入电网,且远离负荷区域,导致机网间联系薄弱,使得风电对电网的影响由局部问题扩展到系统稳定性问题。由于风电机组不同于常规电源的特性,使得含大规模风电场的电网暂态稳定性分析成为一个亟待解决课题。基于扩展等面积定则从理论上分析含风电场的电力系统暂态稳定性,将风电场功率等值为同步发电机的机械功率,考虑了风电场控制作用对同步发电机等值机械功率的影响,据此分析了风电场并网运行对系统暂态稳定影响的机理。最后通过仿真验证了该机理分析的有效性,扩展了等面积定则的应用范围。When wind farms are connected into the grid with high capacity and multi-point, and they are centralized and located far away from load centers, the electrical connection between wind farms and the grid is usually weak. So the impact of large scale wind power on the grid is extended from local issues to the issue of system stability. Unlike conventional power plants, grid-connected wind farms have their inherent characteristics which make the power system transient stability become more complex. In the paper, the power system transient stability including large scale wind farms is analyzed theoretically based on extended equal area rule. The value of wind turbines power is equaled to the mechanical power of the equivalent synchronous generators. The effect of the control of wind farms on the equivalent mechanical power of synchronous machine is also considered. Then according to the method, the power system transient stability including large scale wind farms is discussed. At last, the effectiveness of the mechanism is verified by simulation. In this paper, the equal area rule is extended to analyze the power system transient stability including wind farm.

关 键 词：风电场 暂态稳定性 电力系统 扩展等面积定则 

分 类 号：TM712[电气工程—电力系统及自动化]