Indian Journal of Geo-Marine Sciences Vol.45(10),October 2016, pp. 1377-1388 Performance Investigation of Genetic Algorithm Based LCL Resonant Converter in Marine Applications S.Selvaperumal * , S.Vijayarajan 1 , P.Nedumal Pugazhenthi, G.Prabhakar & R.Nagarajan Department of Electrical and Electronics Engineering, Syed Ammal Engineering College,Ramanathapuram-623502, Tamilnadu, India 1 Department of Electrical and Electronics Engineering, RVS College of Engineering & Technology, Dindigul-624005, Tamilnadu, India * [Email:perumal.om@gmail.com] Received 15 January 2015; revised 18 February 2015 This manuscript presents steady state stability analysis of LCL RC using frequency plot. Careful analysis favours LCL RC has the fine stability region. Also this paper presents a comparative estimation of conventional Proportional Integral Derivative (PID) Controller and Genetic Algorithm (GA) based PID controller for a modified LCL RC. The above controllers are simulated using MATLAB and their performance is analyzed. Result of the analysis shows the supremacy of GA based PID controller over the conventional PID control method. Design, simulation and experimental results for a 133W, 50 KHz GA based LCL resonant converter is presented in this script. In this work, the applicability of the Philips ARM (Advanced RISC Machine) processor LPC 2148 is also investigated for implementing the GA based PID controller for marine applications. [ Keywords: Marine Applications DC-DC Power Converters; Genetic Algorithm; PID Controller; Resonant Power Convertors; Stability Analysis.] Introduction The LCL tank circuit based DC-DC Resonant Converter has been experimentally demonstrated and reported by many researchers [1]-[12]. Borage et al, has experimentally demonstrated with independent load when operated at resonant frequency, making it attractive for application as a constant voltage (CV) power supply. It has been found from the literature that the LCL tank circuit connected in series-parallel with the load and operated in above resonant frequency improves the load efficiency and independent operation [13]. Later, Mangesh Borage et al [14] have demonstrated an LCL-T half bridge resonant converter with clamp diodes. Output current or voltage is sensed for every change in load because the output voltage or current increases linearly. Feedback control circuit has not been provided. LCL-T RC with constant current supply operated at resonant frequency is presented [15].The parallel operation is simple without any complex control circuit which increases the ripple frequency. Later, Yepes et al [16] have demonstrated digital controller implementation of resonant controllers using two integrators. Cost-effective secondary-side LLC resonant controller IC for an LED BLU has been discussed by Hong et al [17]. Beiranvand et al [18] have designed and analyzed LLC resonant converter with wide output voltage range. Feng et al [19] have demonstrated universal adaptive SR driving scheme for LLC resonant converters. A general model for non- isolated resonant gate driver circuit has been devolved by Anthony et al [20]. Shamsi et al [21] have presented a VHF dc–dc boost converter and found that the converter performed VHF switching with low switch voltage stress. Alonso et al [22] have suggested a Constant-Frequency DC-DC Resonant Converters with Magnetic Control. Cho et al [23] have studied a new transformer integrated resonant converter with the additional resonant inductor. The LLC–LC resonant converter using FHA approach has been introduced by Beiranvand et al [24]. Krihely et al [25] briefed resonant rectifier circuit based on highly efficient resonant energy transfer between a capacitive source such as a PZG and an inductor. A common-duty-ratio control scheme was presented by Jianjiang Shi et al [26] for new Input-parallel output-parallel converter system, which consists of two dual-active half- bridge (DAHB) converters as the constituent modules. Yue Wen and Olivier Trescases [27] discussed the advantages and drawbacks of the existing analog and digital nonlinear control techniques. Stability analysis of fuel cell powered dc–dc converters was discussed in