An Improved Over-Speed Deloading Control of Wind Power Systems for Primary Frequency Regulation Considering Turbulence Characteristics

Author:

Zhang Xiaolian1,Lin Baocong2,Xu Ke1,Zhang Yangfei1,Hao Sipeng1,Hu Qi1

Affiliation:

1. School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China

2. School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China

Abstract

Wind power systems participating in primary frequency regulation have become a novel trend. In order to solve the problem of the over-speed deloading (OSD) control of wind power systems failing to provide reserved capacity for primary frequency regulation while under turbulent winds, this paper analyzes the influence mechanism of turbulence characteristics on the OSD control and the relationship between the reserve capacity of OSD control and the deloading power coefficient under turbulent wind speeds, while also quantifying the relationship between the turbulence characteristic index and deloading power coefficient. The range of the deloading power coefficient is obtained accordingly, based on which improved OSD control is proposed to dynamically optimize the deloading power coefficient according to the turbulence characteristics, which improves the frequency regulation performance of wind power systems under turbulent wind speed. According to the simulations and experimental results, the improved method proposed in this paper has good effectiveness and superiority in frequency regulation effect and rotor speed performance.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction

Reference24 articles.

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2. Liu, H., Wang, P., Zhao, T., Fan, Z., and Pan, H. (2022). A Group-Based Droop Control Strategy Considering Pitch Angle Protection to Deloaded Wind Farms. Energies, 15.

3. Active Rotor Speed Protection Strategy for DFIG-based Wind Turbines with Inertia Control;Ding;Autom. Electr. Power Syst.,2015

4. A New Coordinated Virtual Inertia Control Strategy for Wind Farms;Chen;Autom. Electr. Power Syst.,2015

5. Primary Frequency Regulation Control Strategy of Doubly-Fed Induction Generator Considering Supercapacitor SOC Feedback Adaptive Adjustment;Yan;Trans. China Electrotech. Soc.,2021

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