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Single switch inverter is a prevalently used topology for domestic induction heating (IH) applications because of its crisp structure, high efficiency and low cost. The inherent issue with this single switch topology is that it has to withstand the whole power of the load and the huge resonating voltage due to the load current during the energy transfer by the capacitor. This process in due course will reduce the performance and also the life of the system. The cumulative stress on the switch due to dynamic variations in AC mains will cause thermal runaway on the switch. Also, this nonlinear operation at the load results in input current distortions. In this work, a simple voltage-limiting control is proposed to reduce the voltage stress of the switch and to maintain a high power factor. The control circuitry and its logic are verified for 500- W IH prototype. The test results reveal that the suggested scheme is simple and efficient in mitigating voltage stress as well. [ABSTRACT FROM AUTHOR]

Maximum Power Point Trackers (MPPTs) are power electronic conditioners used in photovoltaic (PV) system to ensure that PV structures feed maximum power for the given ambient temperature and sun’s irradiation. When the PV panels are shaded by a fraction due to any environment hindrances then, conventional MPPT trackers may fail in tracking the appropriate peak power as there will be multi power peaks. In this work, a shuffled frog leap algorithm (SFLA) is proposed and it successfully identifies the global maximum power point among other local maxima. The SFLA MPPT is compared with a well-entrenched conventional perturb and observe (P&O) MPPT algorithm and a global search particle swarm optimisation (PSO) MPPT. The simulation results reveal that the proposed algorithm is highly advantageous than P&O, as it tracks nearly 30% more power for a given shading pattern. The credible nature of the proposed SFLA is ensured when it outplays PSO MPPT in convergence. The whole system is realised in MATLAB/Simulink environment. [ABSTRACT FROM AUTHOR]