Contrast Study on Two Instantaneous Feedback Control Techniques of Inverter System

Instantaneous feedback control technology has obtained the widespread application in the domain of power electronics. This paper conducts the contrast study between single voltage instantaneous feedback control technology and the Dual-loop voltage Feedback Control technology based on Capacitive Current Inner-loop. Taking the PWM inverter as research object, analysis and research is made about the PWM inversion system on the basis of two different control modes. The dynamic response of single voltage instantaneous control is slow with worse stability. In contrast, not only can the dual-loop feedback control enhance the stability and the anti-disturbance capacity of the system, but also it can improve dynamic property of the system with good quality of the inverter output voltage as well as low harmonic content. This paper verifies the applicability and reliability of the dual-loop feedback control technology by Saber simulation and experimental test.