Compared to conventional inverter (square wave) multi-level inverter offers quality power owing to different voltage levels utilization in average and high voltage. Besides it also reduces Total Harmonic Distortion in the distributed system and dv/dt across power switches. This advantage is transcendently appropriate for cascaded diode connected converter that can be worked to create more number of levels using asymmetrical voltage source because of their integrated arrangement. However, this benefit no longer exist because it requires many dc links (batteries or rectifiers) which is costlier. Substitute method of implementing single low voltage floating DC link is to recompense voltage distortion using Neutral-Point-Clamped (NPC) converter. This NPC output and controlled floating single DC-link voltage along with controlled PWM strategy reduces the THD. This improves the bandwidth and make simpler the current control scheme. These motivated the study and analyze the performance of a Diode Clamp based three phase nine level multilevel inverterusingnovel PWM approaches in MATLAB 2014b and PROTEUS for hardware development. Thus low power prototype is developed and its performance is shown.

与传统逆变器（方波）相比，多电平逆变器由于在平均电压和高压中的不同电压等级利用而提供了优质的电力。此外，它还降低了分布式系统中的总谐波失真和跨电源开关的 dv/dt。这种优势非常适合级联二极管连接的转换器，由于它们的集成布置，可以使用不对称电压源创建更多的电平。然而，这种好处不再存在，因为它需要许多成本更高的直流链路（电池或整流器）。实现单个低压浮动直流链路的替代方法是使用中点钳位 (NPC) 转换器补偿电压失真。这种 NPC 输出和受控浮动单个直流链路电压以及受控 PWM 策略可降低 THD。这提高了带宽并使当前的控制方案更简单。这些激发了研究和分析基于二极管钳位的三相九电平多电平逆变器的性能，该逆变器使用新的 PWM 方法在 MATLAB 2014b 和 PROTEUS 中进行硬件开发。因此，开发了低功耗原型并展示了其性能。