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Maximum power transfer in solar micro-grid applications is achieved by impedance matching with a dc-dc converter with maximum power point tracking by the incremental conductance method. Cuk dc to dc converters because of the increase and decrease voltage capability is an important and two inductors in the input and output decrease current ripple significantly. This paper describes how to use non-linear inductors in Cuk converter and designs values of capacitors properly. Because of the Cuk converter uses two inductors, use of variable inductors has great value and reduce the size and cost of inductors and increases the operating range of the tracker to recover solar energy at low solar levels. In other words, the range of operation is extended for low light levels or partially shaded solar panels. The MPPT controller with a variable inductance is robust and reliable over the full operating range. The validity of the proposed converter is verified with computer simulations using PSCAD/EMTDC.
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Nasiri et al. (2017) studied this question.
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