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The paper deals with topologies of two, three and four leg converters for two-phase AC motors and the analysis of space vector pulse width modulation. Space Vector Modulated Direct Torque Control (SVM-DTC) for the two-phase induction motor is also used. Proposed control technique and estimators are simulated with Matlab/Simulink. Experimental verification is done with dSPACE environment.
This paper is focused on the usage of the organic Rankine cycles in the current and the new proposed electric power plants. Firstly, the current situation of the usage of these cycles is mentioned. In the next part, the motivation of the utilization, advantages and disadvantages of these cycles are described. Then these cycles are divided by the different working fluids. Further, the modeling of the...
Technical systems which operate in the power industry are the critical systems of strategic importance. In case of such systems the task consisting in the avoidance of the failure occurrence has an extraordinary significance. The failure occurrence is interpreted as the transition of the system technical state from the area of the ability states to the area of the inability states. Therefore, the...
In this paper, the problem of placement and rated power of capacitor banks in the Distribution Network (DN) is considered. We try to suggest the best places for installing capacitor banks and define their reactive power. The considered formulation requires the optimization of the cost of two different objectives. Therefore the use of properly multiobjective heuristic optimization methods is desirable...
This paper presents the design and simulation of an non isolated DC-DC Cuk converter. The input current control is provided with pulse-width modulation (PWM). A closed control loop is used with two proportional-integral (PI) controllers for the current and voltage. The DC-DC Cuk converter is used with Simulink cells for battery and supercapacitors (SC) to simulate the charging and discharging process...
The subject of this paper is the calculation of the induction machine air gap flux density distribution. Following previous paper, the parameters affecting the distribution are integrated to create the final no-load flux density distribution. The no-load calculations are valid for every type of winding and can be applied to almost every type of electric machine. To calculate the flux density distribution...
In this paper, the evaluation of the concept of impedance differential scheme for long transmission line protection is presented. Using the voltages and currents of both line ends, the differential impedance is calculated. Capacitive charging current which constitutes the main drawback of current differential protection is eliminated in presented protection method. What is more, the advantage of presented...
We deal with the numerical model of overheating of primary and secondary coils of voltage instrument transformer. Calculated values are compared with two different measuring methods — measuring with thermal sensors and calculation of heating from measured resistance. All calculations are solved in three operating conditions by rated voltage, thermal limiting output and rated voltage factor 1.9 Un...
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