Load Parameters Effect on Relays Performance for Islanding Detection

In previous works on islanding detection, it is assumed that the worst case condition for a load to encounter islanding condition is RLC load. As a result, most of islanding detection methods used RLC load as a typical load model. In this paper we used a load model which its active and reactive powers are dependent to frequency and voltage. In this work a constant-power DG designed to work at unity power factor. With different load parameters the efficiency of relays is examined. A general formulation was derived and compared to simulation results. The worst cases for both frequency and voltage detection of islanding detection were presented.

Keywords:

Distributed Generation , Islanding Detection , Frequency and Voltage Relay , Anti- Islanding Protection , Non-detection Zone