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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Cascaded H-Bridge Low Capacitance Static Compensator With Modular Switched Capacitors
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Cascaded H-Bridge Low Capacitance Static Compensator With Modular Switched Capacitors

机译：具有模块化开关电容的级联H桥低电容静态补偿器

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摘要

In this article, the effect of large double frequency capacitor voltage ripple (CVR) on harmonic performance, efficiency, and capacitor lifetime in the cascaded H-bridge low capacitance static reactive power compensator (StatCom) (LC-StatCom) is analytically determined. With insight provided by the analysis, an LC-StatCom with modular switched capacitors is proposed that provides a degree of freedom to control the CVR magnitude. The premise of the operation is to keep redundant capacitor modules in standby mode when operating with lower currents. In addition, it is shown that by distributing losses between additional dc-side switches and the main H-bridge switches, the proposed concept provides opportunities for choosing an optimal hybrid combination of semiconductor technologies. The proposed concept is evaluated using a simulated 8.5 MVA StatCom and feasibility of the proposed system is confirmed by experiments on a seven-level 0.8 kVA single-phase LC-StatCom prototype.
机译：在本文中，在分析分析了在分析级联H-Bridge低电容静态无功补偿器（Statcom）（LC-Statcom）中对谐波性能，效率和电容器寿命对谐波性能，效率和电容器寿命的影响。通过分析提供的Insight，提出了一种具有模块化开关电容的LC-Statcom，提供了一种控制CVR幅度的自由度。操作的前提是在使用较低电流运行时保持待机模式下的冗余电容器模块。另外，通过在附加的DC侧开关和主H桥接开关之间分配损耗，所提出的概念提供了选择半导体技术的最佳混合组合的机会。使用模拟的8.5 MVA STATCOM评估所提出的概念，并通过在7级0.8 kVA单相LC-Statcom原型的实验确认所提出的系统的可行性。

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