PERFORMANCE EVALUATION OF HYBRID CONTROLLER INVOLVED IN 3 PHASE TO 3 PHASE POWER CONVERSION USING MATRIX CONVERTER

Among the different types of converters in till date, AC-AC matrix converter are known to be the universal energy processors that can theoretically convert any 3Φ AC source to alternative output supply with variable amplitude and frequency. Besides this generic functionality, matrix converters, being “all-semiconductor” solutions, allow compact, high efficiency, long life and robust converters to be built. The benefits of using direct AC/AC converters are greater for medium voltage converters as they do not require electrolytic capacitors. The power conversions in MC also fulfill the economic demands in reducing the complexity of windings, size of the motor, easy winding replacement, more saving of copper. Simultaneously, closed loop controllers are needed due to real time control, load current THD % reduction, desired load current tracking under fixed and variable loads and steady state error reduction. This paper evaluates hybrid controller based closed loop configurations of matrix converter phase conversion and its performances using MATLAB SIMULINK. The objectives of hybrid controller based closed loop control method is developed for matrix converter to track the desired load current simultaneously with low Total Harmonic Distortion (THD) under all loading conditions with reduced steady state error . A hybrid controller is the combination of (P+I+I)C and FLC which extracts the desired characteristics of both the controllers to achieve fast response in 3Φ to 3Φ MC. From the performance evaluation, hybrid controllers are found satisfactory based on the performance indices like (i) load current tracking time and (ii) steady state error (SSE) in load current.