Power Fluctuations Attenuation in Wind-PV-Diesel Hybrid System - Ultracapacitors and Batteries

In this paper, an energy transfer strategy in a Wind-PV-Diesel hybrid system is studied The Photovoltaic (PV) panels and the wind generator are controlled to operate at their maximum power point and the diesel generator is controlled to maintain the DC-bus voltage at a constant value Ultracapacitors (UC) and batteries are used in a complementary mode to smooth the fluctuations induced by the wind generator (WGE) on the DC-bus These fluctuations are distributed between the batteries and the UC, using two low pass filters This study is focused on the frequencies distribution method and the power converters control strategies An experimental tests bench is designed in the laboratory to validate the proposed energy management strategy Some experimental results are presented and analyzed Copyright (C) 2010 Praise Worthy Prize S r l. - All rights reserved.