NDLI: Control of variable pitch, variable speed wind turbine in weak grid systems

Content Provider	IEEE Xplore Digital Library
Author	Xibo Yuan Jianyun Chai Yongdong Li
Copyright Year	2010
Description	Author affiliation: Department of Electrical Engineering, Tsinghua University, 2-304, West Main Building, Tsinghua University, Beijing, China, 100084 (Xibo Yuan; Jianyun Chai; Yongdong Li)
Abstract	In the case of operating in a weak grid system, when wind power becomes a significant portion of the power system or even the sole energy source, the wind power generator and its converter are expected to help maintain the grid voltage amplitude and frequency, operating like the conventional large synchronous generator (SG). The grid-side converter needs to work as a voltage source to regulate the terminal (grid) voltage amplitude and frequency, which can be achieved by controlling the reactive power and active power flow, respectively. For the direct drive permanent magnet synchronous generator with full power converter, the reactive power can be supplied from the grid-side converter and the active power should be provided by the captured wind power. The power balance between the source (wind) and the grid (load) can be achieved by actively controlling the generator speed and the pitch angle, thus adjusting the wind power input. In the paper, the coordinated control of generator speed and pitch angle are proposed, enabling the generator output power to track the load power. The proposed scheme fully utilizes the system rotational energy by the speed control and the pitch control is used for limiting the speed range and the wind power capture as well. The droop method is used for power sharing among multiple paralleled grid-side wind power converters and the converter dynamics is also considered. The simulation is carried out with different wind speed and load conditions and the results show the proper operation of the proposed control scheme.
Starting Page	3778
Ending Page	3785
File Size	604835
Page Count	8
File Format	PDF
ISBN	9781424452866
DOI	10.1109/ECCE.2010.5618327
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reactive power Droop Weak grid systems Wind speed Permanent magnet generator Power regulation Converters Wind power generation Generators Wind turbines Wind power Voltage control
Content Type	Text
Resource Type	Article

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