基于级联h桥的STATCOM的十二角空间矢量PWM

T. Hussain, A. Das
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引用次数: 2

摘要

提出了一种新的基于级联h桥的静态补偿器(STATCOM)电路拓扑。所提出的电路由具有不对称电容电压的h桥单元组成。然而,h桥电池之间的电压差异小于10%,因此可以采用模块化设计。该电路形成的空间矢量图由6个十二面多边形组成。与传统的六边形空间矢量图相比,十二角空间矢量图提供了更大的调制范围。所获得的提高电压可以适用于静态补偿器,如本文所示。此外,在这个十二角空间矢量图上的十角空间矢量脉宽调制提供了几个优点,如减少谐波,减少开关的dv/dt额制值,完全消除6n±1次谐波(对于n=奇数)等。仿真结果显示了十二角空间矢量PWM在STATCOM中的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dodecagonal space vector PWM for cascaded H-bridge based STATCOM
This paper proposes a new circuit topology for Cascaded H-bridge based static compensator (STATCOM). The proposed circuit consists of H-bridge cells with asymmetric capacitor voltages. However, the difference in voltage among the H-bridge cells is less than 10% leading to a modular design. The space vector diagram formed by proposed circuit consists of six twelve sided polygons (dodecagons). Dodecagonal Space Vector diagram offers increased modulation range as compared to conventional hexagonal space vector diagram. The increased voltage obtained can be used suitable in static compensators as shown in this paper. Additionally decagonal space vector pulse width modulation on this dodecagonal space vector diagram offers several advantages like reduction in harmonics, reduction in dv/dt rating of switches, complete elimination of 6n±1 harmonics (for n= odd) etc. Simulation results demonstrating the benefits of Dodecagonal Space Vector PWM in STATCOM application are also presented.
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