Efficiency Optimization for Active Storage Unit with Adaptive Digital Control

Affiliation of Author(s):自动化学院

Journal:2017 IEEE 3RD INTERNATIONAL FUTURE ENERGY ELECTRONICS CONFERENCE AND ECCE ASIA (IFEEC 2017-ECCE ASIA)

Key Words:Adaptive Control Effciency Optimization Acitive Storage Unit Single-phase PFC converter Digital Control Peak Voltage Control

Abstract:It's known that single-phase power factor correction (PFC) converter has second-order harmonic currents (SHC), which results in voltage ripple on DC load. The active storage unit (ASU) is employed to absorb SHC with ASU's input current (iasu) following SHC. In order to accurately extract ASU's current reference (i* asu) in a simple way, a real-time calculation method is proposed. At the same time, an adaptive method is also proposed in which i* asu changes adaptively according to load, line frequency and ripple energy handled by output capacitor. As a result, ASU is turned off under light load and absorbs partial ripple energy under heavy load to meet the voltage ripple requirement. Moreover, peak voltage control is introduced to improve efficiency when the ASU operates under light load. Therefore, ASU's power loss is reduced and voltage ripple is well controlled within limit. The proposed control strategy is verified by experiment results on a 1.3kW prototype with TMS320F28335 digital controller.

Translation or Not:no

Date of Publication:2017-01-01

Co-author:白雷,李坤奇,吴羽,恵琦

Correspondence Author:REN Xiaoyong

Date of Publication:2017-01-01