Efficiency improvement of solar-wind based dual-input Cuk-SEPIC converter for telecom power supply

Uninterrupted power supply for telecom base transceiver stations (BTS) is required to ensure reliable communication services. This becomes a severe challenge if the BTS is located in remote areas where access to continuous power supply from grid is not available. In this context, this paper presents a hybrid solar-wind energy telecom power supply with battery storage. An improved dual-input Cuk-SEPIC converter (IMDICS) topology is proposed and this converter is configured in parallel power transfer mode (PPT) to achieve higher efficiency. It´s efficiency is compared with Dual-input Cuk-SEPIC converter (DICS) topology. A detailed component wise comparison between these topologies is presented to establish reduction in size of energy storage elements and device ratings. These topologies can extract maximum power from two renewable sources, simultaneously or individually. In order to evaluate the performance of these topologies, simulation studies are carried out and the results are presented. The efficiencies achieved by the DICS and IMDICS are 91% and 93% respectively, thus indicating an improvement in efficiency.