NDLI: Fluctuating characteristic and power smoothing strategies of WECS

Content Provider	IET Digital Library
Author	Jia, Feng Cai, Xu Li, Zheng
Abstract	The electric power output of the wind energy conversion system (WECS) fluctuates owing to the inherent feature of the wind speed, which do harm not only to the power grid it connected into, but also to the lifetime of power converters. The electric power fluctuation characteristic of WECS is analysed in frequency domain under overall wind speed to facilitate the planning of distribution grids and to reveal the key factors influencing power fluctuation under different operation modes. The analysis results are well-validated by detailed simulations. On the basis of power fluctuation characteristic analysis, the power-smoothing schemes are carried out in different operation modes. In variable-speed mode, an enhanced optimal torque control is proposed for power smoothing. In constant-speed mode, the control bandwidth of speed loop or the slope of look-up table is decreased to smooth the electric power, and a feed-forward pitch control is proposed to prevent the wind turbine from exceeding safe speed. In constant-power mode, the suggested power-smoothing scheme is worked out. The analysis results and the proposed control schemes are verified by refined co-simulation platform based on GH bladed and real-time digital simulator.
Starting Page	4568
Ending Page	4576
Page Count	9
ISSN	17518687
Volume Number	12
e-ISSN	17518695
Issue Number	Issue 20, Nov (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/12/20
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2017.1758
Journal	IET Generation, Transmission & Distribution
Publisher Date	2018-05-04
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acceleration Angular Velocity Control Co-simulation Platform Constant-speed Mode Control of Electric Power System Distributed Power Generation Distribution Grid Planning Electric Power Fluctuation Characteristic Analysis Electric Power Output Enhanced Optimal Torque Control Feedforward Pitch Control Frequency Domain Analysis GH Bladed Simulator Look-up Table Mathematical Analysis Mechanical Variables Control Optimal Control Power Converter Power Distribution Planning Power Generation Control Power Grid Power Smoothing Strategy Power System Planning And Layout Real-time Digital Simulator Rotation Control Smoothing Method Speed Loop Control Bandwidth Table Lookup Torque Control Variable-speed Mode Velocity WECS Wind Energy Conversion System Wind Power Plant Wind Turbine
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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