Next Article in Journal
Optimal Placement and Sizing of Renewable Distributed Generations and Capacitor Banks into Radial Distribution Systems
Previous Article in Journal
Energy Modelling and Automated Calibrations of Ancient Building Simulations: A Case Study of a School in the Northwest of Spain
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Energies 2017, 10(6), 808; doi:10.3390/en10060808

Comprehensive Reactive Power Support of DFIG Adapted to Different Depth of Voltage Sags

1
Sate Grid Hunan Electric Power Corporation Research Institute, Changsha, Hunan 410007, China
2
Department of Mechanical Engineering, University of Texas at Dallas, Richardson, TX 75080, USA
3
Electric Power Research Institute, Palo Alto, CA 94304, USA
4
School of Electrical Engineering, Wuhan University, Wuhan, Hubei 430072, China
*
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 9 May 2017 / Revised: 9 June 2017 / Accepted: 10 June 2017 / Published: 14 June 2017
View Full-Text   |   Download PDF [1588 KB, uploaded 14 June 2017]   |  

Abstract

The low voltage ride-through (LVRT) capability of the doubly-fed induction generator (DFIG) significantly impacts upon the integration of wind power into the power grid. This paper develops a novel comprehensive control strategy to enhance the LVRT and reactive power support capacities of the DFIG by installing the energy storage system (ESS). The ESS is connected to the DC-link capacitor of the DFIG and used to regulate the DC-link voltage during normal or fault operations. The unbalanced power between the captured wind power and the power injected to the grid during the transient process is absorbed or compensated by the ESS. The rotor-side converter (RSC) is used to control the maximum power production and the grid-side converter (GSC) is used to control the reactive power before participating in the voltage support. When the supply voltage continues to drop, the rotor speed is increased by controlling the RSC to realize the LVRT capability and help the GSC further enhance the reactive power support capability. The capacity of the GSC is dedicated to injecting the reactive power to the grid. An auxiliary transient pitch angle controller is proposed to protect the generator’s over speed. Both RSC and GSC act as reactive power sources to further enhance the voltage support capability with serious voltage sags. Simulations based on a single-machine infinite-bus power system verify the effectiveness of the developed comprehensive control strategy. View Full-Text
Keywords: doubly-fed induction generator; energy storage system; low voltage ride-through; static synchronous compensator; voltage support doubly-fed induction generator; energy storage system; low voltage ride-through; static synchronous compensator; voltage support
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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

Shen, Y.; Cui, M.; Wang, Q.; Shen, F.; Zhang, B.; Liang, L. Comprehensive Reactive Power Support of DFIG Adapted to Different Depth of Voltage Sags. Energies 2017, 10, 808.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

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