Analysis of wind turbines with permanent magnet generator in the power system.

Author(s)

Mauricio Andres Paez Prieto

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Escola Politécnica (EP/BC)
• Defense date: 2014-07-17

Examining board members

Maurício Barbosa de Camargo Salles; Renato Machado Monaro; Alfeu Joãozinho Sguarezi Filho

• Advisor: Maurício Barbosa de Camargo Salles

Abstract

This master\'s project aims to study the behavior of wind turbines with Permanent Magnet Synchronous Generator, operating during contingencies and changes in wind speed. This configuration has many advantages compared with configurations currently used by leading manufacturers of large wind turbines. The main one is due to the fact of use smaller gearboxes or even gearless turbines. However, the impact on the electrical grid connection of this configuration should be minimized by improving the operating conditions at the connection point of the wind farm. Thus, this project aims to investigate ways to reduce the negative impacts and improve the system stability, especially at the grid connection point. This work employs the simulation software PSCAD for developing a computational model of this technology, considering the main components and controls. New control methods and additional features are included, for improving the reliability and the level of penetration of wind farms with permanent magnet generators in the power system. It is noteworthy that such models are not available in the simulation software PSCAD; therefore it was developed from existing generic models. All parts of the model were done with basic elements; as a result any engineer or researcher can program this same model in any software. This work begins with a brief description of the developed model, including: the aerodynamic model of the wind turbines, the control of the generator side converter, the control of the grid side converter and the protection system of the Link-DC. With this model, the operation of the permanent magnet synchronous generator was analyzed during network contingencies. The application of a sophisticated energy storage system for frequency support was also both developed and analyzed. The connection of wind turbines with Permanent Magnet Synchronous Generator has advantages when its potential for control and operation is used. More details can be checked in the following chapters. (AU)

• FAPESP's process: 12/09989-2 - Analysis of grid connected wind turbines based on permanent magnet synchronous generator
• Grantee: Mauricio Andres Paez Prieto
• Support Opportunities: Scholarships in Brazil - Master