Elimination of ferroresonance in the distribution zone by high ohmic reactor-shunt limiter

Abstract

Electrical network components catastrophically fail as a result of aberrant system oscillations. Also, consequently leads to saturation in the ferromagnetic core elements. These factors induce distortions in the voltage and current waveforms as well as a large rise in voltage or current. This paper presents the role of distributed generation (DG) in contributing to ferroresonance investigation reduction in the distribution sector. A high ohmic reactor-shunt limiter (HOR-SL) is introduced as a novel technique based on a negative sequence component to mitigate ferroresonance. The proposed HOR-SL reduces the ferroresonance in distribution system (DS) by no more than 10.5 msec. A PSCAD/EMTDC software is used to model the ferroresonance phenomenon. The simulation results strongly show the effectiveness of using the proposed HOR-SL for limiting ferroresonant oscillations and creating stable orbit in the distribution sector. Case studies verified the effectiveness of the proposed technique in mitigating ferroresonance oscillations and keeping the security of the distribution zone.

A new method for ferroresonance suppression in an IEEE 33-bus distribution system integrated with multi distributed generation

“…This section implemented and compared the previously published mitigation methods with the proposed method. Therefore, the shunt resistance 36 , shunt reactor, nonlinear shunt reactor, series resistance, and RLC-SL were implemented, with each technique result indicated by a distinct color (shunt resistance was represented by black, shunt reactor was represented by yellow, series resistance was represented by red, nonlinear inductor was represented by green, and the proposed RLC-SL was represented by blue). While the results using ferroresonance mitigation techniques for the first and second load study cases are shown in Figs.…”