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This paper presents a comparative analysis between synchronizing circuits applied to control algorithms for single-phase active converters. One of these synchronizing circuits corresponds to the single-phase PLL (phase locked loop), implemented in ??-?? coordinates, whereas the other one corresponds to the E-PLL (enhanced PLL). These synchronizing circuits are compared in several aspects as processing...
The main objective of this paper is to compare the applicability and performance of a switching compensator when it is controlled by algorithms derived from the pq-Theory and from the Current's Physical Components Power Theory (CPC-theory) considering a micro-grid application. Compensation characteristics derived from each one of these set of power definitions are highlighted, and simulation results...
This paper presents a shunt active filter with a controller able to dynamically limit the output current, which allows an effective protection of the inverter semiconductors without diminishing the active filter performance. The control strategy is based on the p-q theory expanded for three-phase four-wire systems and the power stage of the active filter is composed by a two-level four-leg inverter...
This paper introduces a unified power quality conditioner (UPQC) laboratorial prototype, with a digital control strategy based on the instantaneous power theory (pq-theory) simplifications. The proposed conditioner is capable of being connected in three-phase three-wire systems. An interesting point concerns in the simplifications at the control strategy; the number of measurements was reduced, allowing...
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