Digital Energy Feedback System

With the development of social economic, people paid more and more attention on energy source problem. Energy feedback system can play an important role in cutting down waste of energy and utilizing green-energy. This system was used in electronic power load, distributed generation and motor braking feedback.Energy feedback system was researched in this paper. Power electronic inverter technology is the key in energy feedback. This paper presented and analyzed current-source inverter and voltage-source inverter's work theory, and compared these two inverters. Voltage -source inverter was the emphasis. Single-phase and three-phase inverters are separately analyzed. Several control methods were discussed and amplitude and phase separate modulation was presented.Digital control has large development space. This paper also used digital control to realize energy feedback. PLC and DSP controller were used in current-source inverter and voltage-source device.Based above, a high power SCR current-source line-commutated inverter and a voltage-source line-connected inverter were developed.