ABSTRACT It is very important that the quality of the energy obtained is at a high level while alternating energy is obtained from the direct current energy source. In order to improve the energy quality by reducing the harmonics in the generation of the alternating current, numerous studies have been done on multi-level inverter hardware structures and switching techniques. However, the effect of the slope formed by the difference between the levels in the generated multi-level alternating voltage structure on the resulting harmonic distortions has not been studied so far. So, the paper researches the effects of the inclination between the levels of the alternating voltage generated on load by the inverter. Firstly, after the multi-level inverter structure which can produce four levels of voltage is determined, the operation of this inverter is given in the tabular form. The value of voltage formation gradients (VFG) is calculated according to a generation of multi-level voltages with different amplitude sizes between the levels of the voltage on the R L load after simulation of the system is performed at the Matlab Simulink. After that, obtained load voltages at the simulation are validated in the experiment. The effects of these gradients on the quality of the voltages are determined by measuring harmonic distortions. When the distortion values obtained according to the slope of the alternating voltage structures are analysed, it is seen that the distortion values change significantly as the slope changes. Harmonic distortion caused by VFGs gives the appropriate source values that form voltage levels for the system. Therefore, if the harmonic distortion of the current produced in the load is to be reduced or eliminated, voltage levels of alternating must be generated according to the proposed VFG method.

中文翻译：

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具有部分源的逆变器产生的电压对失真的电平影响

摘要 交流能源是从直流能源中获得的，因此获得的能量的质量处于高水平是非常重要的。为了通过减少交流产生的谐波来提高能源质量，已经对多电平逆变器硬件结构和开关技术进行了大量研究。然而，迄今为止尚未研究由生成的多电平交流电压结构中的电平之间的差异形成的斜率对由此产生的谐波失真的影响。因此，本文研究了逆变器在负载上产生的交流电压电平之间的斜率的影响。首先，确定可产生四级电压的多电平逆变器结构后，该逆变器的操作以表格形式给出。在 Matlab Simulink 上执行系统仿真后，根据 RL 负载上的电压电平之间具有不同幅度大小的多电平电压的生成，计算电压形成梯度 (VFG) 的值。之后，在仿真中获得的负载电压在实验中得到验证。这些梯度对电压质量的影响是通过测量谐波失真来确定的。当分析根据交流电压结构的斜率获得的畸变值时，可以看到畸变值随着斜率的变化而显着变化。由 VFG 引起的谐波失真为形成系统电压电平提供了适当的源值。所以，