考虑高比例多元调节资源互动的配电网无功优化降损方法

Reactive Power Optimization for Loss Reduction of Distribution Network Considering Interactions of High Penetration Level of Multiple Regulating Energy Resources

为了挖掘高比例分布式资源接入背景下配电网全方位多角度无功调控降损潜力,实现更为全面精细的无功优化技术降损目标,提出考虑多元可调节资源协调互动的多目标配电网无功优化降损方法。首先,针对高比例分布式资源接入背景下谐波对线损的影响,给出了考虑谐波损耗的配电网线损计算模型;其次,在此基础上分析多元可调节资源无功调节能力,建立了以日线损最低和静态电压稳定性最大为目标的配电网无功优化调度模型;然后,通过制定多元可调节负荷、分布式电源、储能、无功补偿设备等多元分布式资源协同无功优化策略,达到在综合考虑配电网静态电压稳定性要求下系统线损最小的目的;最后,通过多元分布式资源接入的IEEE 33节点进行系统仿真分析,结果表明通过多元可调节资源的充分互动能够有效提高系统电压稳定性,降低系统线损,实现配电网安全、经济运行。

Under the background of high proportion distributed resource access,in order to fully explore the loss reduction potential of reactive power regulation of the distribution network and reach the target of loss reduction through reactive power optimization technology more comprehensively and precisely,this paper proposes a multi-objective reactive power optimization and loss reduction method considering the coordination and interaction of multiple regulating resources in the distribution power grid.Firstly,regarding the impact of harmonics on line loss in the context of high proportion of distributed resource access,a distribution network line loss calculation model considering harmonic loss is put forward.On this basis,the reactive power regulation capability of multiple regulating resources is analyzed,and a distribution network reactive power optimization scheduling model is established with the objective set as the minimization of line loss and the maximization of static voltage stability.By developing the reactive power optimization strategy of multiple distributed resources such as multiple adjustable load,distributed power supply,energy storage and reactive power compensation equipment,the goal of minimizing the system line loss under the comprehensive consideration of the static voltage stability requirements of the distribution network is achieved.Finally,through the simulation analysis of the improved IEEE 33-bus system,the results show that the full interaction of multiple regulating resources can effectively improve the system voltage stability,reduce the system loss,and ensure the secure and economic operation of the distribution network.