Improved MOV-FxLMS Control for an Autonomous Solar PV-DG-BES Hybrid System for Powering Base Transceiver Stations

The design and control of standalone hybrid electricity supply system based on solar photovoltaic (PV) array and diesel based electricity generator for remote base transceiver station (BTS), are discussed within this paper. A battery based energy storage is also considered as a part of hybrid system for storing additional electricity generated by solar PV array during peak hours of solar irradiance as well as diesel generator (DG). Moreover, the battery handles the power fluctuations from solar PV array. The hybrid system feeds active power generated from a solar PV array to BTS. An incremental conductance (IC) based MPPT technique is applied to harvest maximum power from the solar PV array. Solar PV array and battery supplies uninterrupted electricity to BTS. However, if output power is not enough from solar PV array and battery is not sufficiently charged, then DG is to be live and starts feeding BTS as well as battery. Thus, hybrid system provides reliable electricity to a remote BTS 24x7 without any interruption. The minimum output variance filtered reference least mean square (MOV -FxLMS) technique is embraced to control the hybrid system as well as to improve the power quality (PQ) and cost optimization. The MOV-FxLMS control is employed to improve the PQ parameters like harmonics mitigation, load unbalancing and compensation of reactive power.