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Transactions: WSEAS TRANSACTIONS ON SYSTEMS
Transactions ID Number: 32-620
Full Name: Wen-Yeau Chang
Position: Associate Professor
Age: ON
Sex: Male
Address: No. 499, Sec. 4, Tam King Road, Tamsui, Taipei 251, Taiwan
Country: TAIWAN
Tel: 886-2-28013131 ext. 6514
Tel prefix:
Fax: 886-2-28013973
E-mail address: changwy@mail.sju.edu.tw
Other E-mails: changwy@ms5.hinet.net
Title of the Paper: An Integrated Passive Islanding Detection Method for Distributed Generators
Authors as they appear in the Paper: Wen-Yeau Chang, Hong-Tzer Yang
Email addresses of all the authors: changwy@mail.sju.edu.tw, htyang@mail.ncku.edu.tw
Number of paper pages: 10
Abstract: This study proposes a new islanding detection method for use of grid-interconnected distributed generators (DG). The method is based on two indices: the rate of change of frequency (ROCOF) and the rate of change of voltage (ROCOV). When a DG is grid-interconnected, the ROCOF and ROCOV are lower than the threshold value. In contrast, as an islanding occurs, the ROCOF or ROCOV become much higher than the threshold values. Detection systems monitor terminal voltage at the grid-interconnected point to calculate ROCOF and ROCOV, and issue an operating signal when the value and duration of ROCOF or ROCOV exceed a given threshold. In this study, experiments are conducted to illustrate the principles of the proposed technique for both synchronous generators and induction generators. The test results show that the newly proposed method is reliable, economical, and easy to implement for islanding detection of distributed generators.
Keywords: Islanding detection, Distributed generator, Rate of change of frequency, Rate of change of voltage
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