基于无功/电压控制的电网优化分区方法

Optimization method of power network partitioning based on voltage/var control

电网合适的区域划分有利于无功功率的就地平衡和控制节点电压,因此需对电网进行分区。基于区域无功与电压关系,以无功电源节点为初始节点,应用最大-最小电气距离法合并相邻节点形成初始分区。根据得到的初始分区,再次应用最大-最小电气距离法合并或解裂各初始分区以致最终得到合理分区。应用所提分区方法进行分区,可保证各区域内无功电源节点对负荷节点有较强的电压控制能力,以及无功电源节点与由其进行补偿的负荷节点之间均有较强的电气耦合性,这符合无功功率宜就地平衡的原则。通过IEEE 30节点系统验证了本方法的可行性、合理性和正确性。

A fit partitioning of network is good to balance the reactive power on the spot and control the node’s voltage,so it needs to partition the network.Considering the relationship of the area’s reactive power and voltage,the max-min electrical distance is used to form initial areas by merging the adjacency nodes,while reactive power supply nodes act as start nodes.On the basis of the initial division’s merging and splitting,reasonable partition can be gotten by use of the max-min electrical distance method again.The method proposed can ensure that the reactive power supply to the load nodes have high voltage control capability,and there are more strong electrical coupling between the reactive power supply and the load nodes which is compensated by it,all of these conform with the principle that reactive power should be balanced on the spot.The result of simulation of IEEE 30 system verifies that the method proposed is practicable,reasonable and correctable.