Coordinated control of PV Generation System with Energy Storage Devices in isolated micro-grid

摘要

Based on the mathematical models of PV array and storage battery, this p a per researches the control strategy of the PV/battery common DC bus. With the control of energy storage and output, the battery energy storage can stabilize the fluctuation of the photovoltaic (PV) power generation due to the environmental change. So the uncertainty of photovoltaic power is reduced and the battery charging and discharging are used to maintain the DC bus voltage stability. With PSCAD/EMTDC software, the correctness and validity of the models and control strategies are simulated and verified. The simulation results show that PV system can connect the power grid with constant power under battery regulation, which will be the future trend of the PV systems.