Abstract—The Doubly Fed Induction Generator (DFIG) equipped with self-commutated Insulated Gate Bipolar Transistor (IGBT) is one of the most popular topologies used in wind power systems. It has the ability to control active and reactive power independently. The reactive power capability is subject to several limitations which change with the operating point. This paper proposes a Superconducting Magnetic Energy Storage (SMES) based excitation system for DFIG used in wind power generation and used to store energy. The superconducting magnet connects to the DC side of the two converters, which can handle the active power transfer with the rotor of DFIG and the power grid independently. This paper investigates the thermal behavior of the converter using semiconductor losses. A Space Vector Pulse-Width Modulation (SVPWM) is necessary at around synchronous speed to increase the maximum permissible rotor current as well as reactive power capability.

Index Terms—Keywords: Doubly Fed Induction Generator (DFIG), Superconducting Magnet Energy Storage (SMES), Space Vector Pulse-Width Modulation (SVPWM), Motor Side Converter (MSC), Load Side Converter (LSC)

Cite: Kannan Kaliyappan, S Sutha and R Kathirvel, "SMES BASED DFIG GENERATOR REACTIVE POWER IMPROVEMENT USING SVPWM," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 3, No. 4, pp. 51-66, October 2014.