Design Of Conversion System For Small Distributed Power

Micro-turbine distributed power supply system with high flexibility and reliability, can not only cover the large power line's shortage of inconvenience to remote areas, but also has no shortage of expanding local area networks for large incidents error, therefore, researching distributed power supply has great significance. Since the frequency and voltage of electricity generated by micro-turbine can not supply the users directly. It should be converted the electricity to meet the users by AC-DC-AC conversion system. Conversion system is the important device connecting the micro-turbine and users, this paper introduced a conversion system of AC-DC-AC based on the micro-turbine, and the digital signal processor controller was used in this system.In the conventional conversion system, the diodes or thyristors were used generally and the current harmonic is high. The impact of harmonic on high-speed turbine is prominent for it's small size, power density and heat release difficulties, To reduce the impact of harmonics on the micro-turbine, this paper adopted PWM rectifier. Simulation for the diodes and PWM rectifier based on the Matlab/Simulink has verified the lower current harmonic of PWM rectifier than diodes rectifier. PWM rectifier can decrease the effect of harmonic on the micro-turbine.PWM inverter was used in this paper to meet the demands. The modulate strategy of inverter is SVPWM. This paper gave details of the software design and applications of SVPWM control algorithms. Experiment was carried on the PWM inverter which was designed. And the result confirmed the practicability of the inverter base on the SVPWM control strategy. The job of this paper worked for deep research and established the foundation.