Title :
A practical method for assessing the effectiveness of vector surge relays for distributed generation applications
Author :
Freitas, W. ; Zhenyu Huang ; Wilsun Xu
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, Alta., Canada
Abstract :
This work presents a simple and reliable method for predicting the islanding detection performance of vector surge relays. The relay performance is characterized by a tripping-time versus power-imbalance curve. With the curve, one can determine the time taken by a vector surge relay to detect islanding for any generation-load mismatch level. The main contribution of this paper is the development of analytical formulas for directly determining the behavior of vector surge relays. As a result, efforts needed to asses the relay performance for a given distributed generation scheme can be simplified significantly. The accuracy of the formulas has been verified by extensive simulation study results.
Keywords :
distributed power generation; relays; surge protection; synchronous generators; distributed generation application; distributed generation scheme; generation load mismatch level; islanding detection performance; power imbalance curve; synchronous generator; vector shift relay; vector surge relay; Circuit breakers; Distributed control; Distributed power generation; Frequency; Power generation; Power system relaying; Relays; Surges; Synchronous generators; Voltage; Distributed generation; islanding detection; synchronous generators; vector shift relays; vector surge relays;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2004.838637
