考虑时段优化的地区电网无功电压优化控制  

Power Systems Reactive Power Regulation Considering Schedule Optimization

作　　者：摄伟[1] 刘健[1] 周艳[1] 

机构地区：[1]西安科技大学电气与控制工程学院,陕西省西安市710054

出　　处：《电力系统自动化》2009年第4期31-35,共5页Automation of Electric Power Systems

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET050875)~~

摘　　要：为了实现地区电网无功优化控制,提出了一种改进的基于禁忌搜索算法的方法。将时间分段中的起始点和该分段中的控制变量一同构成解向量,从而避免了先进行时间分段的优化后进行无功优化的二次优化,达到了从整体上进行优化的效果。当邻域解普遍陷入不符合电压约束条件的不可行解区域时,将目标函数切换为以当前电压偏离额定电压最小为目标,当邻域解普遍回到可行解区域后,将目标函数重新切换回以全天内电能损耗最小为目标,从而确保搜索可以持续进行而避免因无可行解而导致优化终止。建议了一种扩展邻域搜索策略改善算法的全局寻优特性。采用IEEE6节点、IEEE14节点和IEEE30节点系统作为算例进行测试,表明提出的方法可行且所采取的改进措施必要、有效。To realize the optimal reactive power regulation of power systems, a new Tabu search based approach is proposed. The solution is composed of the beginning time and the control variables of each time-interval, which can avoid the problem of optimizing the time-intervals and the reactive power of each time-interval separately so that the overall optimality is guaranteed. In the cases of the neighborhood solutions falling into infeasible area, i.e. , the voltage constraints are not satisfied, the index is switched to the voltage quality, so as to guarantee the searching process can work and gradually reach the feasible area. Once neighborhood solutions return to a feasible area, the index is switched back to losses reduction during the whole day. IEEE 6- bus system, IEEE 14-bus system and IEEE 30-bus system are used as the test examples. The results show that the approaches proposed are feasible and the introduced improvements are necessary and effective.

关 键 词：动态无功优化 禁忌搜索 解的构成 初始解 

分 类 号：TM73[电气工程—电力系统及自动化]