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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.

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.

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.