Optimized Design of Double-Loops Controller for Single-Phase Pulse Rectifier without LC Resonant Filter Circuit

Abstract:

Research on the lightweight issue of DC-link is an important direction in modern AC drive electric locomotive. Canceling LC filter circuit is an important way to achieve the goal of lightweight. Therefore, this paper focuses on single-phase pulse rectifier without LC filter circuit. The generation mechanism of DC voltage ripple and network-side current harmonics in grid-side converter is derived. Then, aiming to eliminate the current harmonics, the N-order notch filter and PR controller are introduced to the double-loops controller. The loop of voltage outer controller with N-order notch filter can filter out the ripple of DC-side voltage effectively without affecting the dynamic performance of the controller system. Meanwhile, the loop of current inner controller with PR controller can achieve zero steady-state error control to both the fundamental and harmonic current, and can suppress the low order harmonics in the line current effectively. Analysis shows that replacing the original L₂C₂ filter circuit with software controller is feasible. Finally, the validity and effectiveness of the proposed scheme are verified in computer simulation.

• Periodical: Advanced Materials Research (Volumes 1061-1062)
• Pages: 1031-1038
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1061-1062.1031
• Online since: December 2014
• Authors: Wen Ming Zhang*, Yong Xin Li, Xing Lai Ge, Yang Lu
• Keywords: DC-Link Lightweight, Harmonic Suppression, N-Order Notch Filter, PR Controller, Without LC Resonance Filter Circuit

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