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Tracing current vs. voltage curve is an important part of the documentation of a Photovoltaic (PV) system to comply to the IEC 62446 standard. In order to get the high accuracy, the PV array would be subjected to an unspecified and large number of voltage perturbations often using specialized measuring instruments. In this paper, we explain how to minimize the tracing-time by performing a pre-defined...
The maximum power point tracker/controller extracts maximum power from the PV module. Therefore, an intensive research has been going on to design an effective and efficient method to transfer maximum power from PV module to load. This paper presents an overview of some classical MPPT methods such as Perturb and Observe (P&O), Incremental Conductance (IC), Fuzzy Logic Controller (FLC) and introduces...
A four-level open-end winding induction motor (OEWIM) drive is known to suffer from two perennial problems. One is the problem of zero-sequence currentin the motor phases, which is caused by the existence of zero-sequence voltage in them. The other is the overcharging of the dc-link capacitor of theinverter operated with lower dc-link voltage by its counterpart operated with a higher dc-link voltage...
A four-level open-end winding induction motor drive can be obtained by feeding an induction motor with open-end windings with two two-level inverters, operating with unequal DC-input voltages, which are in the ratio 2:1. A total of 64 space vector combinations, distributed over 37 space vector locations are rendered by this drive. With the conventional 2-level, 3-ph, VSI, the hexagonal space vector...
It is known that Four-level inversion can be achieved with two two-level inverters feeding an open-end winding induction motor from both ends with unequal DC link voltages in the ratio of 2∶1. It is also known that this power circuit configuration could result in the overcharging of the DC-link capacitor corresponding to the inverter operating with the lower voltage. In this paper, a new power circuit...
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