Next Article in Journal
Effect of Torrefaction on the Properties of Corn Stalk to Enhance Solid Fuel Qualities
Previous Article in Journal
Performance of Siloxane Mixtures in a High-Temperature Organic Rankine Cycle Considering the Heat Transfer Characteristics during Evaporation
Article Menu

Export Article

Open AccessArticle
Energies 2014, 7(9), 5566-5585; doi:10.3390/en7095566

Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms

1
School of Electrical Engineering, Southeast University, No. 2, Sipailou, Nanjing 210096, Jiangsu, China
2
China Electric Power Research Institute, No. 8, Nanrui Road, Nanjing 210003, Jiangsu, China
3
School of Automation, Nanjing University of Posts and Telecommunications, No. 9, Wenyuan Road, Nanjing 210023, Jiangsu, China
*
Author to whom correspondence should be addressed.
Received: 20 June 2014 / Revised: 20 August 2014 / Accepted: 21 August 2014 / Published: 26 August 2014
View Full-Text   |   Download PDF [1113 KB, uploaded 17 March 2015]   |  

Abstract

With the rapid development of wind energy, relay protection for large-scale wind farms has been attracting some researchers, due to the absence of standards. Based on the large-scale doubly fed induction generator (DFIG)-based wind farms located in Gansu Province, China, this paper studies the differential protection for the outgoing power transformer of large-scale DFIG-based wind farms. According to the equivalent circuit of the power grid integrated with wind farms, the main frequency components of current and voltage during faults are identified mathematically and then verified by simulations. The results show that the frequencies of current and voltage at the terminals of outgoing transmission lines are inconsistent. Following the feature of frequency inconsistency, the adaptability of differential protection is analyzed, and it is found that differential protection for an outgoing transformer in large-scale wind farms may fail once ignoring the frequency inconsistency. Simulation studies demonstrate that inconsistent frequency characteristics will deteriorate the sensitivity and reliability of differential protection. Finally, several suggestions are provided for improving the performance of relay protections for large-scale DFIG-based wind farms. View Full-Text
Keywords: wind farm; differential protection; transformer; frequency inconsistency wind farm; differential protection; transformer; frequency inconsistency
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Gao, B.; Wei, W.; Zhang, L.; Chen, N.; Wu, Y.; Tang, Y. Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms. Energies 2014, 7, 5566-5585.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top