Voltage Reinjection vs PWM: a Comprehensive Comparison to Improve the Harmonic situation

2022 13th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC) Pub Date : 2022-02-01 DOI:10.1109/pedstc53976.2022.9767314

Saeed Najafpour, R. Ghandehari

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Abstract

one of the most important issues that involves the researchers is selecting an appropriate power electronic converter in different applications. In this paper, to improve the power quality of voltage source inverters, the two most widely used strategies are simulated and analyzed. The voltage reinjection strategy by injecting a 9 levels voltage waveform into a 12-pulse converter can increase the number of pulses to 108 and reduce the THD by 2 percent. Also, the simulated modulation-based converter by an LC passive filter can achieve an identical result. Eventually, a comprehensive comparison is made in terms of stability in the variation of power rating and power factor, costs relative to the nominal power, losses and efficiency. It is shown that the modulation because of low cost and output accuracy is suitable for a large range of low power applications. On the other hand, in high power the voltage reinjections strategy because of high efficiency has a better performance. The simulations approve the final results of the comparison of two analyzed configurations.

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电压回喷与PWM:改善谐波状况的综合比较

在不同的应用场合选择合适的电力电子变换器是研究人员面临的最重要的问题之一。为了提高电压源逆变器的电能质量，本文对两种最常用的策略进行了仿真分析。通过将9级电压波形注入12脉冲转换器的电压回注策略可以将脉冲数增加到108个，并将THD降低2%。此外，采用LC无源滤波器模拟的基于调制的变换器也可以获得相同的结果。最后，从额定功率和功率因数变化的稳定性、相对于标称功率的成本、损耗和效率等方面进行了全面的比较。结果表明，该调制方式具有低成本、输出精度高的特点，适用于大范围的低功耗应用。另一方面，在高功率下，电压再注入策略由于效率高而具有更好的性能。仿真结果证实了两种分析结构的最终对比结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 13th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)

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