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Minimalizacja parametrów kondensatora bilansującego w jednofazowym przekształtniku AC-DC

Stawiarski Ł.

Przegląd Elektrotechniczny

2014

R. 90, nr 10

192-198

Występujące w jednofazowych systemach AC–DC zjawisko niezbilansowania mocy chwilowych wymaga stosowania tymczasowych magazynów energii. W spotykanych topologiach oprócz rozwiązań tradycyjnych (pasywnych) coraz częściej pojawiają się rozwiązania polegające na aktywnym magazynowaniu energii, co pozwala na minimalizację pojemności kondensatorów pośredniczących (ang. DC-link). W artykule zaproponowano jedno z takich rozwiązań. Opisano topologię i działanie układu sterowania oraz zaprezentowano wyniki badań laboratoryjnych.

The phenomenon of instantaneous power imbalance occurring in single phase AC–DC systems requires the use of temporary energy storage. Lately, in addition to the traditional solutions, active energy storage techniques (active power decoupling) which allows to minimize the DC-link capacitance are becoming more popular. The article proposes one of such solutions. Describes the operation principle, control system and presents the results of laboratory tests.

Vector operation of one-cycle controlled matrix rectifier

Yang X., Jiang J., Yang X.

Archives of Electrical Engineering

2012

Vol. 61, nr 2

149-164

In the paper an algorithm and computer code for the identification of the hysteresis parameters of the Jiles-Atherton model have been presented. For the identification the particle swarm optimization method (PSO) has been applied. In the optimization procedure five design variables has been assumed. The computer code has been elaborated using Delphi environment. Three types of material have been examined. The results of optimization have been compared to experimental ones. Selected results of the calculation for different material are presented and discussed. A novel vector operated one-cycle control matrix rectifier (OCC-MR) is proposed in this paper. Matrix rectifier (MR) is a generalized buck three-phase AC-DC converter with four-quadrant operation capability. MR can also be the front-stage circuit of AC-DC-AC equivalent structure of MC. One-cycle control (OCC) is a nonlinear control technique, which integrates modulation algorithm and control strategy. By applying OCC to current control loop, the OCC-MR achieves balance only in a switching cycle,and realizes unitary input power factor. Furthermore, vector operation of OCC results In minimum switching losses. In order to make up for the insufficiency of OCC on load disturbance suppression, a PID controller is added onto output voltage control to improve load regulation. The OCC-MR features great simplicity, fast dynamic response and good immunity on input disturbance. On the basis of theoretical analysis, a systematic simulation of OCC-MR is implemented by means of Matlab/Simulink. Both static state performance and dynamic state performance of OCC-MR are discussed deeply. The simulation results have proved theoretical analysis of the vector operation of OCC-MR, and the control effects are satisfactory.