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Modeling and Modern Control of Wind Power
book

Modeling and Modern Control of Wind Power

by Qiuwei Wu, Yuanzhang Sun
February 2018
Intermediate to advanced content levelIntermediate to advanced
280 pages
8h 42m
English
Wiley-IEEE Press
Content preview from Modeling and Modern Control of Wind Power

Chapter 3Control of Doubly-fed Induction Generators for Wind Turbines

Guojie Li1 and Lijun Hang2

1Department of Electrical Engineering, Shanghai Jiaotong University, China

2Hangzhou Dianzi University, Hangzhou, China

3.1 Introduction

The doubly-fed introduction generator (DFIG) has a growing market. The term “doubly-fed” refers to the fact that the voltage on the stator is applied from the grid and the voltage on the rotor is induced by the power converter. It also means there is both stator- and rotor-fed power to the grid. This system allows a variable-speed operation over a large but restricted range (±30% of synchronous speed). The converter compensates for the difference between the mechanical and electrical frequency by injecting a rotor current with a variable frequency. Both during normal operation and faults, the behavior of the generator is thus governed by the power converter and its controllers [1, 2].

This chapter is arranged as follows. The principles of DFIGs are introduced in Section 3.2. PQ control and direct torque control of DFIGs is presented in Sections 3.3 and 3.4, respectively. Low-voltage ride through of the DFIG is described in Section 3.5. In Section 3.6, conclusions are drawn.

3.2 Principles of Doubly-fed Induction Generator

Doubly-fed induction generator (DFIG) technology is widely used in wind turbine applications. This is mainly because the power electronic converter only has to handle a fraction (20–30%) of the total power and therefore is cheaper. ...

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Publisher Resources

ISBN: 9781119236269Purchase book