Optimal utilisation of photovoltaic system as dynamic voltage restorer for voltage regulation and energy conservation

This paper presents a novel optimal utilisation of photovoltaic (PV) system as dynamic voltage restorer (PV-DVR) for voltage sag, voltage swell, outage and unbalanced voltage mitigation during both daytime and night time. This novel PV system operated DVR reduces the energy consumption from the utility grid by disconnecting the utility grid from the load through semiconductor switches, when the PV system generates excessive or equal real power to the required load demand. However, the reduction of energy consumption is always desirable for the reduction of panel tariff and global warming gasses. In this paper, PV module is connected to the DC side of DVR through the low step-up DC-DC converter with fuzzy-based perturb and observe maximum power point tracking algorithm to eliminate the drawback of the conventional PV system by tracking maximum power point of the PV array is presented. The proposed PV-DVR, if connected at the terminals of a small industry or a home or a small educational institution, can avoid interruption of power, use of individual stabiliser and potential panel tariff over a 12-hour period. A MATLAB Simulink model with a 10 kW PV module is presented to validate the advantage of the proposed system.