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Power factor correction as the right step towards a safer environment

Abramovitz A., Yaskiv V., Smedley K. A.

Przegląd Elektrotechniczny

2013

R. 89, nr 3a

244--246

Generation and transfer of electrical energy can severly degrade the environment. Tthe necessity of joint research in the field of highfrequency power converters with power factor correction to protect the environment from the electromagnetic pollution was discussed. Current state of law and research in several countries was presented. Pasive and active correctors and the idea of new topology for power factor correction wer described.

Działalność człowieka na polu wytwarzania energii elektrycznej powoduje znaczącą degradację środowiska naturalnego. Główny przedmiot zainteresowania przedstawiony w artykule dotyczy analizy wpływu współczynnika mocy na efektywność transferu energii elektrycznej od wytwórcy do końcowego odbiorcy. Przedstawiono stan prac legislacyjnych oraz badawczych w różnych krajach ze szczególnym uwzględnieniem Ukrainy. Opisano dwa typy korektorów, pasywny i aktywny oraz główne założenia dotyczące nowej, projektowanej topologii korektorów współczynnika mocy.

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.