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Bidirectional converter for battery based energy system for residential applications, A
Alsaleem, Abdulhakeem
Alsaleem, Abdulhakeem
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2015
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This Master thesis presents a bidirectional converter controlled by an energy management control system that is designed for a small scale residential application. The bidirectional converter is composed of four leg floating interleaved Buck-Boost converters to provide high power density and high DC-DC voltage gain for grid connection. The bidirectional converter is used to interface battery cells which are used to store excess solar energy and provide them to the load when needed. The energy management control system is composed of two levels: A high energy management control level and a low power conversion level. A new Energy management Algorithm is proposed that includes both load forecasting and solar energy forecasting into the control scheme of energy management. The main goal of this project is to study and to implement the new energy management control system with the bidirectional converter. The objectives of the project are divided in two parts: evaluation of the bidirectional converter and evaluation of the energy management control system. The first part includes a mathematical analysis and modeling of the bidirectional converter as well as performance evaluation through simulation. The second part includes implementation of the new energy management control system and evaluating its performance through simulation. An overall simulation is performed to prove the effectiveness of the energy management control system with the bidirectional converter. The simulation is performed using PSIM software and shows a grid connected hybrid PV/Storage system.
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