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This paper presents a novel strategy realization of the three-level Space-Vector Pulse-Width Modulation (SVPWM): an implementation of simplified algorithm SVPWM for the three-Ievel inverter. Due to the geometrical symmetry of six sectors, there exists close relationships between on time calculations and on time arrangement for switches of the inverter. Therefore, this symmetry can be extended to the remaining sector based on single computation being done for the first sector only. Consequently, compared with the conventional algorithm, the proposed algorithm is more suitable for hardware implementation by greatly reducing computations. Similar configurations are mostly implemented using either DSP card or Dspace platform, which increase the cost of the system. This paper develops the above strategy of simplified SVPWM algorithm using Matlab/Simulink software investigating the use of a cost-effective card and the flexibility of STM32F 4 discovery board. The obtained results witness the ability of STM32F 4 in the control a T-type three-level inverter.

Designing of an effective and an efficient Fractional Order Proportional-Integral-Derivative (FOPID) controller, as a generalization of a conventional PID controller based on fractional order calculus, for an industrial control plant to obtain high-quality performances is of great theoretical and practical significance. This paper presents a new method for optimum tuning of practical FOPID controllers for Automatic Voltage Regulator (AVR) system. The problem is formulated as an optimization problem in which a cost function is proposed as a sum of weighted time domain performance parameters. A Simulated Annealing (SA) meta-heuristic algorithm is used to minimize the proposed cost function. Comparing this technique with previous recent published works demonstrates that the proposed FOPID controller can provide good control performance with respect to reference input and improve the system robustness with respect to model uncertainties.

High quality voltage and current are required when PV generator is connected to grid utility. To this, multilevel inverters are very desirable to be used as connection interface. To keep the cost of the whole system as low as possible, a cost-effective control device using STM32F4 discovery board is employed to control three-level inverter that can be used in grid-tied PV system. The paper develops and implements the control strategy of simplified space vector pulse width modulation (SVPWM) algorithm using Matlab/Simulink software. Obtained experimental results depict the powerfulness of used card as well as the high quality of the delivered power.

In this work, three-phase single stage grid-connected photovoltaic system using current control inverter is simulated using Matlab/Simulink. To deal with varying irradiance conditions, the incremental conductance MPPT has been used, however in order to improve the power quality a three-level (NPC) inverter based SVM control together with LCL filter has been used. The main result of the project is that power has been injected to the grid while the power factor is forced to be unity and the current's THD is kept below the level required by the international standards.

The paper presents the application of the Taguchi's global optimisation algorithm to analyse the self-excited induction generator performances. The analysis is based essentially on finding the root of the equivalent circuit's admittance (or the impedance) being equated to zero. This equation has two unknowns the magnetizing reactance and the frequency. The two variables depend strongly on the equivalent circuit parameters and the external parameters which are the load, the excitation capacitance and the prime mover rotor speed. Previous work on the subject have used either gradient based or global search algorithms. In this work, a new global search technique is used to solve this equation. Besides its global search features, this optimization algorithm is superior in terms of accuracy and ease of implementation. A study of some simulations results carried out using Matlab software has been done to corroborate the above advantages.

The iron loss is a source of detuning in vector controlled induction motor drives if the classical rotor vector controller is used for decoupling. In fact, the field orientation will not be satisfied and the output torque will not truck the reference torque mostly used by Loss Model Controllers (LMCs). In addition, this component of loss, among others, may be excessive if the vector controlled induction motor is driving light loads. In this paper, the series iron loss model is used to develop a vector controller immune to iron loss effect and then an LMC to minimize the total power loss using the torque generated by the speed controller., {"references":["Abrahamsen F., Blaabjerg F., Pederson J. K., Grabowski P. Z. and\nThogersen P., ÔÇÿOn the energy optimized control of standard and high\nefficiency induction motors in CT and HVAC applications-, IEEE trans. on\nindustry applications, vol. 34, No 4, July-August 1998","D.W.Novotny and T.A.Lipo, ÔÇÿVector Control and Dynamics of AC Drives-,\nClarendon Press, Oxford, UK, 1996.","S. Vaez-Zadeh and F. Hendi, ÔÇÿA continuous efficiency optimization\ncontroller for induction motor drives-, Energy Conversion and Management\n46 (2005) 701-713","Wang J.B., Liaw C.M., \"Indirect field oriented induction drive with fuzzy\ndetuning correction and efficiency optimization controls\", IEE Proc. Electr.\nPower. Appl., Vol.144 n┬░.1, January 1997, pp.37-45.","Sousa G.C.D., Bose B.K., \"Fuzzy logic based on-line efficiency\noptimization control of an indirect vector controlled induction motor drive\",\nIEEE conference record IAS, pp.1168-1174, 15-19 /Nov, 1993, Hawai,\nUSA.","Lim S. and Nam K., ÔÇÿLoss-minimising control scheme for induction\nmotors-, IEE Proc.-Electr. Power Appl., Vol. 151, No. 4, pp. 385-397, July\n2004","Nam S. W. and Nasir Uddin M., ÔÇÿModel-Based Loss Minimization Control\nof an Induction Motor Drive- IEEE ISIE 2006, July 9-12, 2006, Montreal,\nQuebec, Canada","Matsuse K., Yoshizumi T., Katsuta S., Tanigushi S., \" High - Response\nFlux Control of Direct Field Oriented Induction Motor with High Efficiency\nTacking Core Loss into Account\", IEEE Trans. on Indus. Appl., Vol.35, No.\n1, JAN./FEB. 1999, pp.62-69.","Dal Y. Ohm, ÔÇÿDynamic Model of Induction Motors for Vector Control-,\nDrivetech, Inc., Blacksburg, Virginia, 2000.\n[10] Levi E., Boglietti A., and Lazzar M. ÔÇÿPerformance Deterioration in Indirect\nVector Controlled Induction Motor Drives due to Iron Losses-, IEEE trans.\non Indus. Appl., pp. 1312-1318, 1995.\n[11] Jinh w. J., Nam K., ÔÇÿA Vector Control Scheme for EV Induction Motors\nwith Series Iron Loss Model-, IEEE trans. Ind. Electron. Vol. 45, No. 4, pp.\n617-624, August 1998."]}