Development, Based On The Dsp2812 5kw Pv Inverter

As the photovoltaic power system's important component, the inverter's reliability and transfer efficiency is critical to carrying out PV systems and reducing system cost. The inverter design plan without power frequency inverter is proposed, therefore it has a small volume weight, portable, low cost, etc.The PV inverter was researched completely from the following aspects in this thesis:1. The basic principle of Boost DC/DC converter circuit and Full-bridge inverter circuit which will be used for system design was described in details. And the theory and fulfillment of PID algorithm are discussed, single-phase full-bridge SPWM inverter control technology and its implementations are analyzed. The Boost DC/DC converter circuit and Full-bridge inverter circuit are simulated separately with using Matlab/Simulink software.2. The entire hardware circuit system includes:Main circuit, Power circuit, Driving circuit, Signal conditioning circuit, LCD interface displaying circuit, etc. And a separate design for each circuit is given in the dissertation. In addition, the elaboration to the power component IGBT protection are given.3. A prototype is debugged and the experimental waveforms are obtained. The results verify the correctness and effectiveness of the inverter.4. In single-phase inverter development basis, three-phase inverter for a preliminary inquiry is researched in this dissertation. The modeling and simulation for three-phase PWM inverter under one-cycle control is completed with Matlab/Simulink software. The simulation results show that power factor near 1 and output sinusoidal currents are obtained, moreover, it verifies that principle of the method is feasible.