The reverse zero-sequence current compensation strategy for back-to-back active power conditioners
Journal
ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
Date Issued
2016
Author(s)
Abstract
In this paper, a novel reverse zero-sequence current (RZSC) compensation strategy for three-phase four-wire back-to-back active power conditioner (APC) is proposed. The objective of the APC is to achieve the active and reactive power compensation between two micro-grids. However, for the unbalanced voltage sag micro-grid system, the double-line frequency oscillation exists in the output active/reactive power of the APC. In order to eliminate these power oscillation, the zero-sequence current control must be utilized, but it will produce the line frequency ripple voltage on the split capacitors of the dc-bus. The capacitor ripple voltage will speed up the aging process and reduce its life-time. Therefore, the RZSC strategy is proposed to compensate the impact of the ripple voltage to the split capacitors. The circuit configuration and control block diagram of the APC will be introduced. The operation principle of the proposed RZSC strategy will be presented. Both computer simulations and hardware experimental results are presented to verify the performance of the proposed RZSC.
Type
conference paper