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This paper presents a virtual tool for programmable logic controllers (PLC). It provides a friendly graphical environment to perform programming tasks in an easy way and without being necessary to be connected to a PLC. Therefore, the application can be used from everywhere without spatial-temporal constrains. The supported programming languages are those under the IEC 61131 standard and a graphical...
This paper presents a three-phase unified power quality conditioner (UPQC) based on two types of power cells. Differently to topologies based on symmetrical units, the proposed topology is assembled using one type of single-phase power cells for compensating disturbances at the fundamental frequency and another type for compensating harmonic currents. This feature allows the implementation of the...
This paper shows two alternatives of a multi-cell converter composed of 3N cells per phase and a multi-pulse power transformer. Both achieve high power quality waveforms in three-phase applications even in the presence of unbalanced AC mains. This is due to the controlled DC link voltage loop. However, under asymmetrical loads just one configuration achieves high performance AC supply currents. The...
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