Özet:

The tensions levels on the entrance side for the multi-level Eviricals (CSE) which are widely used today are a significant limitator. In high-power energy systems, the lack of power of the switch element to be used in two-level converters, the distinction of the output wave shape from the sinus and the use of the transformator resulting from the production of low voltage are the disadvantages of the classic two-level converters. The use of high switching frequency to reduce total harmonic distortion (THD) in two-level converters also increases switching losses. In this study, the modeling was done in Matlab/Simulink environment to reduce the THD rate of the asymmetric converter and to network connection. In the framework of the study, the asymmetrical H-bridge evictor in the three-feeding voltage structure has been modeled and the switching signals have been produced with the sinusoidal shock width modulation (SDGM) control algorithm. The network connection of the eviric is controlled by the developed PI control algorithm and PLL control algorithms. In the results obtained by the PI designed, the THD rate is seen to decline. It has also been observed that the system works dynamically and quickly according to the open cycle. The system has both open cycle running with both PI controller and PI-PLL running with THD rates and the recommended one-phase network interactive convertible control method has been verified. The study found that the results from PI and PI-PLL controls in the control system were approximately the same, but the PI-PLL control method provided more efficient results. In addition, the system is connected to the network without the need for mixed control methods and algorithms with the designed PLL method.

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