摘要
低频振荡是影响互联电网安全稳定运行的突出问题,提高系统阻尼是防止区间低频振荡最有效的措施。本文提出了一种基于遗传算法的优化机组有功出力的方法,通过在线模态分析,优化调整后的机组有功出力提高了最弱阻尼区间振荡模式下的阻尼比,从而预防低频振荡事故。建立区间最弱振荡模式阻尼比最大为目标函数,采用遗传算法,对机组有功出力进行优化,并将该方法对4机2区域系统及新英格兰10机39节点系统进行了仿真分析。结果表明,该方法可以有效提高最弱模式阻尼比,对预防低频振荡起到很好的效果。
Low frequency oscillation is an outstanding problem that affects the safe and stable operation of interconnected power network. Enhancing the system damping is the most effective measure to prevent inter-area low frequency oscillation.Basedon Genetic Algorithm, a method of the optimization of generation active power is proposed, which is using online mode analysis. Due to the optimization of the active power output of generators, the damping ratio of the weakest damping interval oscillation mode can be improved, which can prevent the low frequency oscillation accident. In order to optimize the active power output, the method establishes the maximum of the damping ratio of the weakest damping interval oscillation mode as the objective function and applies the genetic algorithm, which is used to simulate the 4-machine 2-area system and the new England 10-machine 39-bus system. The results show that the method can effectively improve the damping ratios of the weakest mode, and is good for preventing the low frequency oscillation.
出处
《电子设计工程》
2016年第6期49-52,共4页
Electronic Design Engineering
关键词
互联电网
低频振荡
模式阻尼
优化控制
interconnected power network
low frequency oscillation
mode damping
optimal control
