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Compensation of Current Harmonics by means of Multiple Generation System with Doubly-Fed Induction Generators

Abstract

This paper presents the topology of a power generation system connected to a grid based on two doubly-fed induction generators (DFIG) with selective current harmonic compensation capabilities. The scheme uses a grid-side converter, which provides a DC voltage, and two rotor-side converters. The grid-side converter is connected to the network and each of the rotor-side converters is connected to the rotor of the respective generator. DFIG’s basic control algorithm aims primarily to obtain maximum wind power output at variable wind speeds. The possibility of improving the electric energy quality within the power of the converter is realized by compensating the grid current harmonics. Generating maximum active power and improving power quality is the purpose of the rotor-side converter control. The harmonic components of the current are distributed for compensation by two generators separately. The whole system is simulated, and the results are presented to demonstrate the feasibility of the proposed scheme.

Authors

• Ivan Shapoval (Institute of Electrodynamics of the National Academy of Sciences of Ukraine)
• Valerii Mykhalskyi (Institute of Electrodynamics of the National Academy of Sciences of Ukraine)
• Mykhailo Artemenko (National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”)
• Vasyl Chopyk (Institute of Electrodynamics of the National Academy of Sciences of Ukraine)
• Serhii Polishchuk (Institute of Electrodynamics of the National Academy of Sciences of Ukraine)