Modified Design Approach Using Cuckoo Search Optimization Algorithm for Mitigation of Harmonics and Improvement of Efficiency in Back Light LED TV Power Supply

High power factor solutions are needed in Light Emitting Diode (LED) Television (TV) which otherwise results in the following problems: (i) Power is recycled from the backlight LED to the power source. (ii) Harmonics from backlight LEDs degrade the line which, in turn, affects the performance of other devices on the line. (iii) Additional losses are generated in the load which reduces efficiency. This paper proposes Cuckoo Search (CS) optimization algorithm based Interleaved DC-DC Single Ended Primary Inductance Converter (SEPIC) Converter for reducing the harmonics and thereby improving the efficiency of the power supply used for driving backlight LED. Cuckoo search (CS) algorithm using different fitness functions like Integral Square Error (ISE), Integral Absolute Error (IAE), Integral Time Square Error (ITSE) and Integral Time Absolute Error (ITAE) are employed for finding the optimal controller parameters. Various characteristics like rise time, peak time, peak overshoot, settling time, input power factor, % THD and % efficiency are used to analyse the performance of the proposed scheme using MATLAB/Simulink software tool.