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Abstract
A three-phase T-type converter topology proposes for wind turbine based on doubly fed induction generator (DFIG). The proposed converter consists of only twelve power switches without flying capacitors or any clamping diodes. The proposed system is implemented to grid side converter of wind turbine. Fuzzy logic controllers are more widely used in wind turbines compared to traditional control systems. Fuzzy logic PI controller has been applied to T-type and the conventional neutral-point clamped (NPC) converters control circuits. Total harmonic distortion (THD) value of current of presented system is measured as 1.76%. Also, DC-link voltage utilization can be maintained. Comparisons are conducted with T- type converter and a 3L-NPC) method under same operation conditions. The proposed scheme has been carried out to verify in simulation results.
Highlights
IN RECENT YEARS, wind turbines have gained considerable importance among renewable energy sources
The proposed system are used less electronic components compared to 3L-NPC
A three-phase T-type converter topology is presented for wind turbine based on doubly-fed induction generator (DFIG)
Summary
IN RECENT YEARS, wind turbines have gained considerable importance among renewable energy sources. The two level three phase converters (traditional type) are used quite a lot in wind turbine. The energy quality of traditional converters is low and they are not used for high voltage values. For this reason, multi-level converters have started to be applied for wind turbines in recent years [3]. The high number of switches in multi-level inverter is a disadvantage On another hand, multi-level converters have superior features compared to conventional converters. T-type are not required high voltage and current diodes. A three-phase 3-level T-type converter is proposed for wind turbines based on DFIG.
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