Distributed Storage System with Solar Photovoltaic Energy Source

The management of Renewable Energy Sources (RES) and storage systems in order to connect to an LV distribution network imposes several challenges for the end user. In addition, the nonlinear nature of the power electronic interfaces and the end-user loads create Power Quality issues in LV distribution network. In this paper, a power electronic device is proposed as a solution to the end user for the management of RES, storage and for the mitigation of the Power Quality. The device, named Distributed Storage system, is connected in parallel to the end user and the network. It facilitates online and island mode of operations. The device can manage injection of power into the network, of a RES, such as a PV, charging and discharging of a storage system and mitigate the Power Quality issues of the end-user by acting as a shunt active filter. The system structure, design, and control strategies are dealt with in this paper along with the description of hardware prototype realized.