Search Results

1 - 10 of 10 items :

  • Electronics x
Clear All
Multiobjective Improved Particle Swarm Optimisation for Transmission Congestion and Voltage Profile Management using Multilevel UPFC

References Albatsh, F. M., Mekhilef, S., Ahmad, S. and Mokhlis, H. (2017). Fuzzy-Logic-Based UPFC and Laboratory Prototype Validation for Dynamic Power Flow Control in Transmission Lines. IEEE Transactions on Industrial Electronics, 64(12), pp. 9538–9548. Batra, I. and Ghosh, S. (2018). An Improved Tent Map-Adaptive Chaotic Particle Swarm Optimization (ITM-CPSO)-Based Novel Approach Toward Security Constraint Optimal Congestion Management. Iranian Journal of Science and Technology, Transactions of Electrical Engineering , pp. 1–29. Dutta, S

Open access
Performance and Stability Analysis of Series-Cascaded, High-Gain, Interleaved Boost Converter for Photovoltaic Applications

, Canada, 28th September-2nd October, 2014. Van der Broeck, H. and Tezcan, I., (2006). 1 KW dual interleaved boost converter for low voltage applications. In: Proceedings of the 5th International Power Electronics and Motion Control Conference, IPEMC, Shanghai, China, 14-16 August 2006. Veerachary, M. (2004). General rules for signal flow graph modeling and analysis of dc-dc converters. IEEE transactions on Aerospace and Electronic Systems, 40(1), pp. 259-271 Wen, J., Jin, T. and Smedley, K. (2006) A new interleaved

Open access
Inductive Current Transducers in the Frequency Range Up to 150 kHz

Abstract

The article presents the results of the research on inductive current transducers in the form of a uniform winding non-magnetic ring with a rigid and flexible construction encompassing the flow of processed current in the frequency range of up to 150 kHz. The results for the developed transducer were related to the results obtained in simulations conducted on the transducer simplified model. The frequency tests of this type of transducers are of key significance in the assessment of the applicability of a given transducer in the measurements of network signals with high-order harmonics, and particularly in the assessment of the construction capacity of inductive current transducers in the form of the Rogowski coil.

Open access
A METHOD OF REDUCING SWITCHING LOSSES IN THREE-LEVEL NPC INVERTER

Abstract

The aim of the paper is to present a concept of implementation of a space vector modulation (SVM) algorithm, which is used to create alternating current waveforms of changing amplitude and frequency in power inverters. The main goal of the method is to decrease the number of state changes in power transistors. It is realized by utilizing a prediction algorithm and sequences of transistors, which are not common in use. The method requires measurement of inverter output current flow. The prediction algorithm analyzes possible sequences of transistors’ states and choose those which offers smaller switch count. A decrease of about 20% was obtained for the cases tested. This paper presents simulation result for selected driving scenario. The described method decreases the number of state changes in power transistors and therefore it is a potentially good method to considerably decrease energy losses of multilevel inverter-powered drive.

Open access
Modified Scheme of Predictive Torque Control for Three-Phase Four-Switch Inverter-Fed Motor Drive with Adaptive DC-Link Voltage Imbalance Suppression

Abstract

Classical voltage space vector modulation techniques cannot be efficiently applied in four-switch three-phase voltage inverter-fed electrical drives due to a voltage offset in DC-link capacitors. The capacitor voltages imbalance is a result of a bidirectional current which flows in a phase of an electric motor that is connected to a DC-link capacitor midpoint. To overcome this problem which leads to an incorrect inverter voltage modulation or even can affect the DC-link capacitors, predictive control algorithms considering the voltage offset in DC-link capacitors have been developed. Despite the predictive methods are highly effective, they require to adjust the cost function weighting factors which is normally an inexplicit task. In this paper, an on-line tuning method of the weighting factor related to the capacitor voltages imbalance incorporated in the cost function of the predictive algorithm has been proposed. According to the proposed approach, the weighting factor is self-adjusted so that the DC-link capacitor voltages are stabilized as well as a high quality of the drive control is remained simultaneously, regardless of its operating point. The proposed strategy has been validated by using simulation model of the induction motor drive system.

Open access
Design of Pyramidal Horn Antenna for 2.45GHz in FEKO for Application in Experimental FSO/RF Hybrid System

Abstract

Communication technologies are growing for day to day because demand on data sharing is unstoppable. Users require availability of approach to network at all time. Implementation of smart technologies allows communication of all type of devices. Capacity of data flow have to grow. Video formats HD or 4K require transmit on high data speed. Based on the demands many types of different communication systems which are suitable for these speeds were designed. One of these systems is FSO (Free Space Optics). FSO system is based on transmission of optical beams which carry the information. This system allow high data speed comparable with standard optical fiber in range to 10km. One of drawbacks of this system is LOS (Light of Sight) between communication points. The other drawback is sensitivity to weather changes. Optical beams interfere with water particles and cause attenuation on transmission path. The solution is in implementation using hybrid FSO/RF system which combines optical communication system with RF (Radio Frequency) backup link. We realized FSO communication link on Technical University of Košice. Our research is focused on design of appropriate type of antenna for our RF backup link. Our results in this area were published.

Open access
The Performance of Direct-Driven Variable Speed Wind Turbine with PMSG and Converter Systems

Control of Wind Energy, John Wiley & Sons, INP, Publication 2011. [12] YADAV M.K., UPADHAYAY A.K., Power Flow Control of Permanent Magnet Synchronous Generator Based Wind Energy Conversion System with DC-DC Converter and Voltage Source Inverter, International Journal of Electronic and Electrical Engineering, 2014, Vol. 7, No. 8, 803-814.

Open access
A MULTILEVEL SWITCHED CAPACITOR DC-DC CONVERTER. AN ANALYSIS OF RESONANT OPERATION CONDITIONS

Publishing AG, 2017, 361-378. [3] LEI Y., PILAWA-PODGURSKI R.C.N., A general method for analyzing resonant and soft-charging operation of switched-capacitor converters, IEEE Trans. Power Electron., 2015, 30, 10, 5650-5664, DOI: 10.1109/TPEL.2014.2377738. [4] XIONG S., WONG S.C., TAN S.C., TSE C.K., Optimal Design of Complex Switched-Capacitor Converters Via Energy-Flow-Path Analysis, IEEE Transactions on Power Electronics, 2017, 32, 2, 1170-1185. [5] CAO D., PENG F.Z., Zero-current-switching multilevel modular switched

Open access
An Overview of Design, Control, Power Management, System Stability and Reliability in Electric Ships

-voltage DC-bus operation for reduction of switching losses in all-electric ship power systems , IEEE Trans. Power Electron., 2014, 29(11), 6151–6161. [66] S u C.-L., L in K.-L., C hen C.-J., Power flow and generator-converter schemes studies in ship MVDC distribution systems , IEEE Trans. Ind. Appl., 2016, 52(1), 50–59. [67] S eenumani G., S un J., P eng H., Real-time power management of integrated power systems in all electric ships leveraging multi time scale property , IEEE Trans. Control Syst. Technology, 2011, 232–240. [68] S eenumani G., S

Open access
An Overview of Carrier-based Modulation Methods for Z-Source Inverter

. U. and Tariq, M. (2016). Study of traditional and Z-source converter under variable fuel-flow-rate of PEMFC. 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET) , pp. 1–6. IEEE. Roomi, M. (2017). Analysis of An Ideal Dual-Impedance Network Using Reference Disposition Modulation. Electronics Letters , 53, pp. 668–670. Roomi, M. M., Maswood, A. I., Tafti, H. D. and Raj, P. H. (2017). Reference Disposition Modulation Method for Non-Ideal Dual Z-Source Neutral-Point-Clamped Inverter. IET Power Electronics , 10

Open access