Research on the Control of AFE Converter

Abstract:

In this paper, a strategy of AFE converter based on direct power control is presented. The AFE converter possesses the merit of sinusoidal current on grid-side, controllable power factor and constant DC voltage, meanwhile, power feedback to the grid can be realized. Firstly, a power control mathematical model of AFE converter in two-phase synchronous rotating coordinate is built, on this basis, adopts the square of voltage control in the outer control loop and limits the slope of the setting voltage to improve the starting performance; then uses power feedforward decoupling control in inner control loop , combines with the instantaneous power theory and uses space vector control algorithm to replace the switch table to solve the problem that switching frequency is not fixed in traditional direct power control. Ultimately realizes the independent control of active and reactive power without decoupling. The experimental results verify the correctness and validity of the proposed control strategy.

• Periodical: Applied Mechanics and Materials (Volume 654)
• Pages: 233-237
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.654.233
• Online since: October 2014
• Authors: Jian Tang, Yue Nan Zeng*, Lei Zheng, Jin Hui Liu
• Keywords: AFE Converter, Direct Power Control, Instantaneous Power Theory, Space Vector Modulation

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