Cluster Partition Method of Distributed Photovoltaics for Voltage Regulation in Distribution Network

With the promotion and popularization of distributed photovoltaics, the penetration of distributed photovoltaics in the distribution network is increasing, which will lead to voltage fluctuations and endanger the operation safety of the power grid. Distributed photovoltaics connected to the distribution network in a cluster way can effectively alleviate its negative impact on the power grid. This study takes a modified IEEE 33-Bus Power Feeder System as the research object, and proposes a cluster partition method of distributed photovoltaics using voltage sensitivity index. The method analyzes the influence active power and reactive power of distributed photovoltaics on distribution network voltage, which can be used for the voltage control of the power grid. When the voltage of a node exceeds the limit, the over-limit voltage can be restored to normal by adjusting the reactive power or active power of the corresponding nodes in the cluster to ensure the safe and stable operation of the power grid.