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This paper focuses on potential power quality impact of electric vehicles in terms of voltage profile and harmonic contamination in a low voltage CIGRE benchmark distribution system. Voltage drop and harmonic distortion have been amongst the main power quality concerns in view of likelihood of large-scale penetration of electric vehicles in transportation system. Simulations are carried out to quantify...
The desire to decrease electrical loading by using energy efficient lighting has resulted in a high level of attention to replacing conventional incandescent lamps with compact fluorescent lamps (CFL). In Iran from energy management point of view, people are encouraged by ministry of power to use CFLs. Also after elimination of subsidies, the substantial increase in electric energy price resulted...
The operation of photovoltaic (PV) units connected to the grid is characterized by several uncertainties due to the number of currently operating units, the points where these units are sited, the exported power, and the injection of harmonic currents. The objective of this paper is to investigate the impact of the penetration of PV units in the low-voltage (LV) network. Thus, a model has been developed...
This paper addresses the issue of the evaluation of how modern and restructured Transmission and Distribution (T&D) infrastructures help accomplish the so-called EU 2020 targets, in terms of efficiency increase, CO2 reduction and a wider employ of renewable energy resources. A methodology is proposed in order to quantify the possible environmental benefits as well as the power quality improvement...
A control method for small domestic power plants using renewable energy is described in this paper. This method is not only capable of optimizing the working point of the plant but also implements active power factor correction and lowers the extant harmonic distortion in the line. The novel element in the proposed complex controller structure is the upper harmonic controller that minimizes the amplitudes...
This paper makes a study of method of reactive power compensation to improve the efficiency of transmission and distribution grid. A simulation model based on instantaneous reactive power is proposed as an example for three-phase unbalanced power grid to show that unbalanced current could be compensated completely. By means of reactive power compensation to unbalanced electric power grid, line loss...
The paper presents experimental verification of the quality of LTI power grid model valid for the frequency range of 8 kHz. The single PCC was investigated so the paper is the local, university grid investigations oriented, however concerns two general important problems: one is the absolute accuracy of real grid impedance measurements to which no direct reference data are accessible, the second is...
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