Abstract With the development of iron and steel smelting technology, application proportion DC electric arc furnaces will gradually increase in future. In this paper, Simulink model is built with reference to 130-ton furnace produced by ABB ZHONG Shan Transformer Company Limited. model, power performances large-capacity are explored adjusting trigger angle, side resistance, reactor values. From...

Any electrical power system consists of wide range of electrical, electronic and power electronic equipment in commercial and industrial applications. Since most of the electronic equipment is nonlinear in nature these will induce harmonics in the system, which affect the sensitive loads to be fed from the system. One among the many compensating devices is Unified Power Quality Conditioner (UPQ...

In this paper, a new single-stage input-currentshaping (ICS) technique that integrates the voltage-doublerrectifier front end with a dc/dc output stage is introduced. Due to the voltage-doubler-rectifier front end, the reduction of linecurrent harmonics can be achieved with a higher conversion efficiency compared to the corresponding single-stage ICS circuit with the conventional wide-range ful...

The analysis of known control systems the active four-quadrant rectifier with pulsewidth modulation applied on a rolling stock electric railway transport, and methods definitionof modal symmetric optimum is carried out. necessity automatic regulation system forstabilization output voltage under condition current change established. controlsystem three-phase basis pulse-width isdeveloped. static...

Abstract Aiming at the problems of voltage fluctuation and harmonics in photovoltaic grid connection, improvement a three-phase rectifier circuit is proposed, results are verified by MATLAB simulation. At same time, this paper also puts forward application four-wire three-level parallel APF structure Three-term PWM rectification technology. By compensating harmonic current generated controlling...

Yuji Yoshida shigeo suzuki Yuji Mukai Kazuo Nakatani Katsuhiko Fujiwara* Matsushita Electric Industrial Co., Ltd. Central Research Laboratory 3 15 Yagumo-Nakamachi Moriguchi, Osaka 570, JAPAN *Air-conditioner Division The use of mixed refrigerants for heat-pump cycles h ave attracted the attention of the International Energy Agency as an important subject of heat-pump technology and its re sear...

An accurate average value model of synchronous machine-rectifier system considering the effect of stator resistance is derived in this paper. A proper voltage-behind-reactance synchronous machine model without any approximations is used for the generator that allows effective calculation of commutation displacement angle. All rectification modes of the rectifier are studied. A detailed switchin...