Gain Scheduled Torque Compensation of PMSG-Based Wind Turbine for Frequency Regulation in an Isolated Grid

Haixin Wang, Junyou Yang, Zhe Chen, Weichun Ge, Shiyan Hu, Yiming Ma, Yunlu Li, Guanfeng Zhang and Lijian Yang
Additional contact information
Haixin Wang: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Junyou Yang: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Zhe Chen: Department of Energy Technology, Aalborg University, 9100 Aalborg, Denmark
Weichun Ge: Liaoning Province Electric Power Company, Shenyang 110006, China
Shiyan Hu: Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, MI 49931, USA
Yiming Ma: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Yunlu Li: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Guanfeng Zhang: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Lijian Yang: School of Information Science and Engineering, Shenyang University of Technology, Shenyang 110870, China

Energies, 2018, vol. 11, issue 7, 1-19

Abstract: Frequency stability in an isolated grid can be easily impacted by sudden load or wind speed changes. Many frequency regulation techniques are utilized to solve this problem. However, there are only few studies designing torque compensation controllers based on power performances in different Speed Parts. It is a major challenge for a wind turbine generator (WTG) to achieve the satisfactory compensation performance in different Speed Parts. To tackle this challenge, this paper proposes a gain scheduled torque compensation strategy for permanent magnet synchronous generator (PMSG) based wind turbines. Our main idea is to improve the anti-disturbance ability for frequency regulation by compensating torque based on WTG speed Parts. To achieve higher power reserve in each Speed Part, an enhanced deloading method of WTG is proposed. We develop a new small-signal dynamic model through analyzing the steady-state performances of deloaded WTG in the whole range of wind speed. Subsequently, H ∞ theory is leveraged in designing the gain scheduled torque compensation controller to effectively suppress frequency fluctuation. Moreover, since torque compensation brings about untimely power adjustment in over-rated wind speed condition, the conventional speed reference of pitch control system is improved. Our simulation and experimental results demonstrate that the proposed strategy can significantly improve frequency stability and smoothen power fluctuation resulting from wind speed variations. The minimum of frequency deviation with the proposed strategy is improved by up to 0.16 Hz at over-rated wind speed. Our technique can also improve anti-disturbance ability in frequency domain and achieve power balance.

Keywords: deloading method; frequency regulation; gain scheduled compensation; PMSG-based wind turbine; torque control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/7/1623/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/7/1623/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:7:p:1623-:d:153709

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().