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The Optimization Strategies for Parallel Operation between Doubly-fed Variable Speed Constant Frequency Wind Turbines and Grid

Author: WangZhiMing
Tutor: LiuQiHui
School: North China Electric Power University (Beijing)
Course: Proceedings of the
Keywords: Wind Power Network side converter Machine side converter Across the run Asymmetric control
CLC: TM614
Type: Master's thesis
Year: 2011
Downloads: 131
Quote: 0
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Abstract


Doubly-fed VSCF wind turbine as a mainstream model in the wind power generation , the network side converter and machine side converter based grid control strategies under normal operating conditions , however with the wind farm installed capacity growing and specification requirements continue to increase , making the study of wind power technology to run from the normal grid operating conditions turned to run through the grid failure . According doubly-fed variable speed constant frequency wind turbine converter structural features in two ways ( network side converter and machine side converter ) were studied . First, the network side converter grid under normal operating conditions and the characteristics of the machine side converter , established a mathematical model based on its topology and build a control strategy . Established on the basis of a three-phase stationary coordinate system in case of grid failure , the two-phase stationary coordinate system and the mathematical model of the two-phase synchronous rotating coordinate system in the network side of the converter and the machine side converter and stator instantaneous output power active power, reactive power component . Followed for the network side converter lack of dual positive and negative sequence current inner control strategy , put forward innovative asymmetric control strategy based on predictive current method for different degree of voltage drop on the machine side converter improved control strategies and increased hardware circuit (crowbar) . PSCAD and RTDS (Real-Time Digital Simulator) platform , the simulation results proved the correctness of this paper, control methods and strategies , and to provide a reliable reference for engineering applications .

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Variety of power generation > Wind power
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