JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2013, Vol. 43 ›› Issue (3): 105-110.

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An antiislanding protection technique based on the characteristics of faulted current

YU Qing1, LU Xiao-hui2, HAN Yao-peng2   

  1. 1.Shandong Electric Power Engineering Consulting Institute Corp Ltd., Jinan 250013, China;
    2. School of Electrical Engineering, Shandong University, Jinan 250061, China
  • Received:2013-05-20 Online:2013-06-20 Published:2013-05-20

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Abstract:

A new anti-islanding protection technique was proposed based on the characteristic of faulted current. This method artificially created short circuit in the port of distributed generator to produce a faulted pulse current, which could effectively reflect the change of the system impedance. The islanding status could be judged through monitoring and analyzing the faulted pulse current. The equation of the faulted pulse current was derived, and the criteria for the islanding determination were set up. Disturbance between signals and the effect on the system were also analyzed. Finally, this method was validated by theoretical analysis and computer simulation.

Key words: anti-islanding protection, faulted current, power quality

CLC Number: 

  • TM346.2
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