A novel method for simultaneous phase balancing and mitigation of neutral current harmonics in secondary distribution systems

摘要

In this paper, a novel method is proposed to reduce phase unbalance and mitigate neutral line current harmonics in the secondary distribution systems without using any active or passive shunt device, shunt compensation scheme or phase swapping technique. The proposed strategy employs a Phase Balancer (PB), which has been derived from the conventional three-phase transformer. In order to understand the working of the proposed PB, its analytical treatment is presented using symmetrical components. The application of the proposed PB has also been investigated for different balanced and unbalanced non-linear actual loading cases and the application results are presented.