基于NSGAⅡ的交直流系统无功优化

Reactive Power Optimization of AC-DC System on NSGAⅡ

在交流系统与直流系统互联以及大规模分布式电源并网中,传统以网损或电压稳定性的单一目标函数已经无法满足电网优化的需求。为此,以交直流系统总网损和节点电压偏移量作为目标函数构建多目标交直流系统模型,在传统遗传算法加入快速非支配排序方法,并且在遗传过程中采用精英保留策略防止优良个体的丢失,从而求解得到多个pareto非劣解集。对IEEE30节点系统标准算例进行验证,所得结果验证了所提方法的可行性。

With the reform of transmission network,the interconnection of AC and DC systems and the grid connection of large-scale distributed generators,the traditional single objective function of network loss or voltage stability has been unable to meet the demand of power grid.A multi-objective AC/DC system model taking total network loss and node voltage offset as objective functions is constructed.In the traditional genetic algorithm,a fast non-dominated sorting method is added,and elite retention strategy is used to prevent the loss of good individuals in the genetic process,so that multiple Pareto non-inferior solution sets can be obtained.The standard example of a IEEE30-bus system verified the feasibility of the proposed method.