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This paper presents a harmonics current-less AC-DC power conversion system with the integration of a series active compensator to a large-rated double series diode rectifier. The series active compensator and the diode rectifier are directly connected in parallel thus shares a common dc bus. Due to this compensator, the diode rectifier draws three-phase sinusoidal currents from AC mains. In addition,...
Airport electrical distribution network has a number of non-linear and single-phase loads that cause imbalances, resulting in significant amount of current flow in the neutral conductor, even under normal operating conditions. The power quality of the airport distribution system is adversely affected by its lighting load controlled by a constant current controller. This paper addresses the related...
Three-phase induction motor of ratings beyond 50 kW take very large low power factor currents while being started directly from a 3-phase supply. Normally soft-starts are used for avoiding this problem and to achieve smooth starting of large capacity induction motors. A 3-phase AC voltage controller is employed as a soft-start. But, this takes harmonic-rich current especially while operating at large...
A three-phase shunt active filtering algorithm based on the real component of fundamental load current (I cos Phi) has been proposed and implemented in a novel manner in this paper. The complete simulation and hardware implementation of the active filter (AF) with the proposed algorithm has been presented. Simulations have been performed for various dynamic operating conditions under balanced/unbalanced...
In this paper, two shunt active filtering algorithms, namely, synchronous detection technique and newly proposed I.cosϕ algorithm have been simulated and implemented in hardware and a comparison has been brought out. The proposed algorithm is found to work satisfactorily under various system operating conditions. The hardware implementation of both the schemes have been done and the proposed scheme...
This paper presents the simulation and real time hardware implementation of shunt active power filter in analog devices DSP (ADMC401) environment. The synchronous detection method is applied to calculate compensating currents while the three phase source is feeding a highly non-linear load. Synchronous detection algorithm is capable of working under both balanced and unbalanced source voltages. The...
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