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In this work, a predictive current control algorithm of an active filter built with multilevel diode clamped inverter is developed. Cycle by cycle current optimization is achieved through current prediction based on converter switching states and system parameters. The presented current control algorithm is naturally applicable to converters with an arbitrary number of levels with constant computational...
An improved hybrid current control algorithm is presented for active power filter (APF) to compensate the harmonic current in three-phase four-wire asymmetric power system. Based on the analysis of the circuit structure of three-phase four-leg APF, the feasibility of hybrid current control is described in this paper. The method of instantaneous value comparison by timing control based on voltage space...
This paper presents a detailed study on the design and analysis of user-defined constant switching (UDCS) frequency current-control-based four-leg distribution static compensator (DSTATCOM). The three phase legs of its voltage source inverter are operated in hysteresis current tracking mode whereas the fourth leg is controlled by a square switching pulse of user-defined frequency. Consequently, the...
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