ANALYSIS AND MITIGATION OF UNBALANCE DUE TO LOAD IN DISTRIBUTION SYSTEM BY USING ACTIVE POWER FILTER

A.N.V.V. Raja Sekhar, D. Jagadeesh Babu, S.Viswanadh, K.Harika

Abstract: Distribution network losses can vary significantly depending on the load unbalance. Here, an analysis of distribution system losses is presented that considers load unbalance and the effect of explicitly represented neutral wire. A general power flow algorithm for three-phase four-wire radial distribution networks, based on the current summation backward-forward technique is applied. Loss analysis results obtained from three-phase four-wire medium and low voltage test feeders with unbalanced load scenarios are presented and discussed an active power filter is designed, simulated, implemented, and tested. It can work in different modes: active power filtering, power factor correction, and load unbalance compensation. It is based on a current controlled voltage-source inverter with fixed carrier PWM. The control algorithm generates the source reference currents based on the controlled DC link voltage. The dimensioning criteria of the inductive and capacitive power components are discussed. The implementation is validated with simulated and experimental results obtained in a 5 kVA prototype.

Keywords: distribution networks, losses, load unbalance, power flow

DOI: https://doi.org/10.15623/ijret.2013.0211063