General Information
    • ISSN: 1793-821X (Print)
    • Abbreviated Title: J. Clean Energy Technol.
    • Frequency: Quarterly
    • DOI: 10.18178/JOCET
    • Editor-in-Chief: Prof. Haider F. Abdul Amir
    • Executive Editor: Ms. Jennifer Zeng
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Universiti Malaysia Sabah, Malaysia.
I would like to express my appreciation to all the reviewers and editors, who have been working
very hard to ensure the quality of the journal. It's my honor to work with such a wonderful team.

JOCET 2016 Vol.4(6): 401-407 ISSN: 1793-821X
DOI: 10.18178/JOCET.2016.4.6.321

Adaptive Setting and Simulation of Distance Protection Relay in a Long Transmission System Connected to an Offshore Wind Farm

Yuan-Kang Wu, Zhou-Ting Lin, Tung-Ching Lee, Ting-Yen Hsieh, and Wei-Min Lin
Abstract—Offshore wind power has become the focus of the world’s renewable energy development. In Taiwan, several demonstration offshore wind turbines will be scheduled to be established by 2015, and more than 300MW capacity of offshore wind farm to be installed by 2020. As the penetration level of wind energy increases, more reliable protection systems for offshore wind farms are required. The wind farm protection system is usually divided into different protection zones including the wind farm area, wind farm collection system, wind farm interconnection system and the utility area. Different protective zones have different protection schemes and relay settings. This project has proposed an adaptive distance relay that protects submarine cables between an offshore wind farm and an AC grid. The double-circuit submarine cables that connect offshore wind farm in Penghu and Taiwan grid will be utilized as an example. First, the apparent impedance of the relay is mathematically derived using a detailed equivalent circuit model, and the characteristic trip boundaries of the relay in various scenarios are obtained. The nonlinear characteristics of the trip boundaries that are used in a typical distance relay with four protection zones will be discussed. Furthermore, the effects of the uncontrollable factors on the performance of a distance relay have been considered into the simulations. These system disturbances include wind speed variation, system short circuit faults, or system component failures. These case studies have been presented using the simulation package to evaluate the feasibility of the distance relay setting that is developed in this project.

Index Terms—Offshore wind power, protection system, distance relay.

Yuan-Kang Wu and Zhou-Ting Lin are with the National Chung-Cheng University, Chiayi, 62102, Taiwan (e-mail:
Tung-Ching Lee, Ting-Yen Hsieh, and Wei-Min Lin are with Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu, 31040, Taiwan.


Cite:Yuan-Kang Wu, Zhou-Ting Lin, Tung-Ching Lee, Ting-Yen Hsieh, and Wei-Min Lin, "Adaptive Setting and Simulation of Distance Protection Relay in a Long Transmission System Connected to an Offshore Wind Farm," Journal of Clean Energy Technologies vol. 4, no. 6, pp. 401-407, 2016.

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