A Multi-Inverter Coordination Optimization Method for Distribution Networks with High Penetration PV

Distributed generation (DG) has an important impact on the voltage stability of the distribution network. Access to photovoltaic (PV) generation leads to voltage fluctuation in the distribution network. In this paper, a centralized droop optimization control (CDOC) method is proposed to tackle these issues. The PV inverters compensate the reactive power to regulate the voltage within the rated range after the node voltages have been evaluated using power flow calculation and sensitivity analysis. This way multi-inverters can mitigate voltage fluctuations in distribution networks. The proposed method is applied in the IEEE 33-bus system using Matlab software and its effectiveness is demonstrated through simulation results.