计及分布式电源集群不确定性的配电网分散鲁棒电压控制

A decentralized robust voltage control method for distribution networks considering the uncertainty of distributed generation clusters

随着光伏、储能等分布式电源广泛接入,导致配电网区域电压波动频繁。针对分布式电源分散接入带来的不确定性问题,提出了一种计及分布式电源集群不确定性的配电网分散鲁棒电压控制方法。将大规模分布式电源聚合成相互关联的集群,对电压控制进行分区域调节。首先,针对配电网结构复杂和分布式电源点多面广的问题,设计一种基于改进Louvain算法的配电网集群划分方案,利用模块度函数并兼顾了集群的电压灵敏度和分布式电源调控容量。然后,由于分布式电源接入后配电网潮流更加复杂多变,在划分集群的基础上提出一种考虑不确定性的分散鲁棒控制方法,协同各分布式电源集群的调控能力,抑制由于模型参数及功率波动等不确定性导致的配电网电压波动。最后,通过算例分析验证了所提方法的可行性和有效性。

With the access distributed generation such as photovolatic and energy storage systems,the voltage of the distribution network fluctuates frequently.To solve the uncertainty issues caused by widespread distributed generators,a decentralized robust voltage control is proposed considering the uncertainties of distributed generation clusters.It aggregates large-scale decentralized resources into clusters to perform decentralized voltage control.First,in view of the complex structure of the network and the wide range of generators,a clustering method based on the improved Louvain algorithm is proposed.This further considers the voltage sensitivity and capacity of distributed generators in its modularity function.Second,since the power flow of the distribution network is more variable with distributed generators,a decentralized robust control method considering the uncertainties of the voltage sensitivity is proposed on the basis of cluster divisions.The voltage fluctuations caused by uncertainties such as model parameters and power fluctuations can be suppressed by coordination of controllable clusters.Finally,the feasibility and effectiveness of the proposed method is verified by case studies.