APF-based cancellation of the source-end zero sequence current

Abstract

Analytical assessment of the successful neutral current cancellation methods is the main goal of this paper. Furthermore, proposing a generalized time-domain method is pursued in order to achieve full cancellation of the source-end neutral current under unbalanced and distorted load voltage waveforms. The suggested technique makes it clear that any time-domain methods, capable of eliminating the neutral current under non-ideal load voltages, necessarily uses the proposed technique. Additionally, the IRP, the CMIP and the Z_GTIP methods are reviewed as the well known successful algorithms in cancelling the zero sequence current under non-ideal circumstances. Apparently, these methods are dissimilar and there is no relationship among them. Then, a comprehensive analytically performance assessment on these methods is presented to extract the precise reason of their efficiency under non-ideal load voltages. As another contribution of this paper, it is concluded that the aforementioned methods are derived from the same root, involving in the proposed idea. Thus, the significance of the proposed idea in cancelling the source end neutral current will be clear.