Coordinated Voltage Control for Distributed Photovoltaic Storage System Based on Fast Finite-Time Consistency

In recent years, the penetration of distributed photovoltaic (PV) systems in distribution networks has increased. The temporal and spatial mismatch between PV output and load often causes voltage overruns, impacting the safe and stable operation of the network. This paper proposes a two-stage distributed control strategy for photovoltaic inverters and energy storage, based on a fast finite-time consistency algorithm. First, the principle of voltage overruns in distributed PV low-voltage networks is analyzed. The reactive power utilization of the PV inverter and changes in the storage charge state are selected as consistency variables. The coordinated control of the PV inverter’s reactive power and the storage system’s active power is then achieved using the fast finite-time consistency algorithm. Finally, a 14-node low-voltage distribution network with a distributed PV storage system is used for validation. The results demonstrate that the proposed strategy overcomes the limitations of single-link control, effectively mitigates voltage overruns, and reduces voltage control costs.