多站点无功补偿装置的多目标协调控制

发布时间：2018-01-22 18:00

本文关键词： kV变电站静止无功补偿器低压电容/电抗器多目标优化协调控制　出处：《中国电机工程学报》2014年04期 　论文类型：期刊论文

【摘要】：针对目前500 kV变电站中无功补偿装置所采用的单独补偿控制方式,提出一种多目标协调控制方式来克服无功补偿装置缺乏协调且损耗较大的不足。该方法将变电站内低容/低抗装置纳入SVC的控制体系,并考虑站与站之间无功补偿装置的相互影响,以节点电压偏差和无功补偿装置总损耗最小为目标建立多目标无功协调控制模型。根据无功协调控制中变量敏感度不同、局部搜索能力不足的特点,将控制变量划分为敏感变量和非敏感变量,采用具有二级搜索的改进NSGA-II算法求取其Pareto最优解集。对南方电网中电压耦合较强的2个变电站在3种不同负荷水平下进行无功协调控制仿真,结果表明优化结果能够根据控制需要为决策者提供多种最优的协调控制策略。与常规NSGA-II算法和法线边界交叉算法的对比,表明改进NSGA-II算法得到的Pareto解集具有更优的收敛曲线及分布性。
[Abstract]:In view of the current 500 kV substation reactive power compensation device used in the individual compensation control. A multi-objective coordinated control method is proposed to overcome the deficiency of lack of coordination and large loss of reactive power compensator. In this method, the low-capacity / low-reactance devices in substation are integrated into the control system of SVC. The interaction of reactive power compensator between station and station is considered. The multi-objective coordinated reactive power control model is established with the aim of minimum node voltage deviation and the minimum total loss of reactive power compensator. According to the different sensitivity of variables in reactive power coordinated control, the local search ability is insufficient. Control variables are divided into sensitive variables and non-sensitive variables. The improved NSGA-II algorithm with two-level search is used to obtain its Pareto optimal solution set. Reactive power coordination control for two substations with strong voltage coupling in Southern Power Grid under three different load levels is carried out. Simulation. The results show that the optimization results can provide a variety of optimal coordinated control strategies for decision makers according to the control requirements, and compared with the conventional NSGA-II algorithm and the normal boundary crossing algorithm. It is shown that the Pareto solution set obtained by the improved NSGA-II algorithm has better convergence curve and distribution.
【作者单位】：华南理工大学电力学院;
【基金】：国家863高技术发展计划项目(2012AA050209) 国家自认科学基金项目(51107042)~~
【分类号】：TM761.1
【正文快照】： 0引言无功补偿装置的合理配置和控制可以为远距离输电系统提供强有力的电压支撑。到目前为止,南方电网“西电东送”主通道上的各500 kV变电站不仅安装了多套低压电容器组和低压电抗器组,还安装了5套静止无功补偿器(static varcompensators,SVC)。这些无功补偿装置根据调度中

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