An Overview on Control of Variable Pitch and Variable Speed Direct-Drive Wind Turbines in Weak Grid Systems With Active Power Balance
Volume: 5 - Issue: 02 - Date: 01-02-2016
Approved ISSN: 2278-1412
Published Id: IJAECESTU259 | Page No.: 901-905
Author: Shikha Chaturvedi
Co- Author: Nisheet Soni
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 generators and
converters are expected to help maintain the grid voltage. The gridside converter needs to work as
a voltage source to help regulate the terminal (grid) voltage amplitude and frequency by adjusting
the reactive power and active power flow, respectively. For a direct-drive permanent magnet
synchronous generator with a full power converter, the active power must be provided by the
captured wind power. The active power flow between the source (captured wind power) and the
grid (load) must be balanced by actively controlling the generator speed and wind turbine pitch
angle. In the study, the coordinated control of generator speed and blade pitch angle is proposed
together with a dc-link voltage controller.
Key Words:-: SCIG (squirrel cage induction generator), PCC (point of common coupling), DFIG (doubly-fed induction generator)
Area:-Engineering
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