Abstract
In view of the global challenges of energy security, climate change, and sustainable development, exploring the renewable energy draws a lot of attention in recent years. Throughout a variety of the renewable energy technology, photovoltaic technology has more environmental and economic benefits than the others. In order to utilize the photovoltaic energy effectively, the AC-Module is a hot research topic in recent years. Basically, the so called Module Integrated Converter (MIC) involves the concept of an inverter which can provide a “plug and play” function and greatly optimize the energy yield.Due to the low dc voltage level of a PV module, a high step-up MIC with pseudo dc link is proposed in this thesis for Building Integrated PV (BIPV) application. Basically, major contributions of this thesis can be summarized as follows. First, a single stage high step-up MIC with pseudo dc link and galvanic isolation is proposed for BIPV systems to solve the partial shading problem. By using coupling inductor technique and the line frequency switching inverter, the proposed MIC can achieve higher efficiency. Moreover, an instantaneous maximum power tracking control previously developed by this lab is adopted. Next, both dc and ac mathematical models of the proposed converter are derived for steady state analysis and close loop compensation. At last, a 150 watts 30V input 110Vrms output prototype is implemented. The overall conversion efficiency is more than 88% from full load to light load. Both simulation and experimental results indeed verify the effectiveness of the proposed converter.