Research on a New Type of Composite Islanding Detection Method
Science Discovery
Volume 5, Issue 2, April 2017, Pages: 86-93
Received: Apr. 20, 2017; Published: Apr. 20, 2017
Views 961      Downloads 35
Authors
Wang Hao, Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an, China
An Yuan, Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an, China
Wang Songkai, Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an, China
Ding Hang, Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an, China
Article Tools
Follow on us
Abstract
Distributed photovoltaic (PV) grid failure occurs, the short circuit fault current is small, and the power flow is bidirectional, the traditional power grid relay protection method is no longer applicable. In this article, through the study of traditional active frequency drift islanding detection method (AFD), analyses its advantages and disadvantages and applicable occasions, a new type of composite island detection method is proposed, the method based on adaptive islanding detection method accelerated frequency shift (AAFD), by introducing the common coupling point voltage frequency in a direction of continuous change number n, piecewise adaptively adjust frequency positive feedback coefficient, accelerate the limit of the frequency deviation, if the number of change if more than a dozen times, are not the limit of the frequency, the constant 2 cycle of negative pulse current amplitude power frequency interference, trigger under-voltage protection, so as to detect the island.this method can reduce the grid harmonic distortion rate, improve the response time of the island detection. At last, through Matlab simulation to verify.
Keywords
Distributed Photovoltaic, An Island Detection, Frequency Deviation, The Adaptive
To cite this article
Wang Hao, An Yuan, Wang Songkai, Ding Hang, Research on a New Type of Composite Islanding Detection Method, Science Discovery. Vol. 5, No. 2, 2017, pp. 86-93. doi: 10.11648/j.sd.20170502.12
ADDRESS
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
U.S.A.
Tel: (001)347-983-5186