Modeling and Modern Control of Wind Power

Chapter 5Modeling of Full-scale Converter Wind Turbine Generator

Yongning Chi¹, Chao Liu¹, Xinshou Tian¹, Lei Shi² and Haiyan Tang¹

¹China Electric Power Research Institute, Beijing, China

²NARI Technology Co. Ltd, Jiangsu, China

5.1 Introduction

The full-scale converter (FSC) wind turbine generator (WTG) is connected to the grid through full rating AC/DC/AC converters. The FSC-WTG consists of the wind turbine, generator and FSC [1], and the FSC system can be further divided into the generator-side converter, DC link, and the grid-side converter. The output of the FSC-WTG is rectified by the generator-side converter and then supported by the capacitor, and the energy is fed to the grid through the grid-side converter. The FSC-WTG can achieve a flexible connection with grid through the control over-converter, and in the event of a grid fault, the converter can also greatly improve the reactive current contribution of the WTG to the grid, enhancing the ability of the WTG to deal with grid disturbances [2].

The gearbox is optional for the FSC WTG. There are many types of generator used in FSC-WTGs, such as the squirrel cage induction generator (SCIG), the permanent magnet synchronous generator (PMSG), and the electrical excitation synchronous generator. The basic structure of a FSC-WTG is shown in Figure 5.1. With its excellent operating characteristics, the FSC-WTG has become mainstream, alongside the doubly-fed induction generator (DFIG) WTG. In particular, FSC-WTGs based on ...