Because of an upcoming modernization of the electric system in unit 3 and 4 at Ringhals AB, new short-circuit current calculations have to be made. This report focuses on the development of a model of the electric power system in a nuclear power plant in order to perform short-circuit current calculations. In this model, different components can be exchanged in order to investigate future adjus...

Power electronic device, nonlinear and unbalanced loads have given rise to power quality problem in distribution systems. Due to factors like competitive generation patterns in a deregulated electric grid and an increasing level of sensitive end user devices, it has become necessary to ensure both reliable and power quality to the end customer. One way to betterment the power quality is using a...

The electric arc furnaces are a very large power load, determining the negative effects on the power quality (harmonics currents, unbalanced load, and reactive power). For a maximum efficiency of the power consumption it is necessary to use an automat system of electrodes position control, in order to obtain a high value of power factor and a maximum efficiency. In this paper is present an adap...

An approach recently introduced to correct the power factor of single-phase and three-phase diode rectifiers is extended to single-phase line-frequency phase-controlled rectifiers. First of all, the conventional circuit of the thyristor based rectifier is proposed to be modified in order to make possible the control of the DC-voltage mean value also in presence of a fully resistive behaviour of...

This paper presents a hierarchical control strategy for heat and electric power control of a building integrating hybrid renewable power sources including photovoltaic, fuel cell and battery energy storage with Plug-in Electric Vehicles (PEV) in smart distribution systems. Because of the controllability of fuel cell power, this power sources plays the main role for providing heat and electric p...

A high-performance electric motorcycle (HPEM) integrated charger-inverter (ICI) with an induction motor (IM) is proposed in this article. Typical components are shared drive and charge modes, resulting savings of weight, volume, cost. two-stage ICI for AC powertrain power factor correction (PFC) battery charger functions considered. Despite high voltage ripple on the DC link, a bandwidth nonlin...

an electric arc furnace (eaf) is known as nonlinear and time variant load that causes power quality (pq) problems such as, current, voltage and current harmonics, voltage flicker, frequency changes in power system. one of the most important problems to study the eaf behavior is the choice of a suitable model for this load. hence, in this paper, a probabilistic three-phase model is proposed base...

The renewable energy sources and plug-in electric vehicles (PEVs) are becoming very popular because of the combination of high fuel costs and concerns about emission issues. This paper presents modelling and control of a Building Integrated Fuel Cell and Plug-in Electric Vehicles (BIFC-PEV) in smart distribution systems. In BIFC-PEV system, conventional building elements could be replaced by sp...

Power factor and distortion measuring usually requires special and expensive equipment. Computer-based acquisition modules and software provide possibility to create simple and non-expensive methods and instruments for power factor measurement and distortion characterization of small loads and bring all advantages of virtual instrumentation [1,2,3,4]. One approach to power factor and distortion...