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具有最优三次谐波环流注入的低电容级联H桥静止同步补偿器负序电流能力研究

Negative-Sequence Current Capability in Low-Capacitance Cascaded H-Bridge Static Compensators With Optimal Third-Harmonic Circulating Current Injection

语言:

中文摘要

级联H桥(CHB)低电容静止同步补偿器(LC-StatCom)因电容电压波动较大,其负序电流注入能力受限。为防止过调制,需限制电容电压波动。本文提出通过注入最优三次谐波环流来优化电容电压波动,从而提升系统在弱电网或不平衡电网下的负序电流补偿能力。

English Abstract

The cascaded H-bridge (CHB) low-capacitance static compensator (LC-StatCom) has a limited negative-sequence current injection capability compared to a conventional CHB StatCom, due to the comparatively larger oscillations on the capacitor voltages. Placing limits on the ability to provide negative-sequence current to the grid for a given capacitor size is required to prevent overmodulation. This a...
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SunView 深度解读

该技术对阳光电源的集中式光伏逆变器及大型储能系统(如PowerTitan系列)具有重要参考价值。在大型电站应用中,电网不平衡及弱电网工况对系统稳定性提出了更高要求。通过引入三次谐波环流注入控制策略,可以在不增加电容容量(即降低成本和体积)的前提下,提升系统在复杂电网环境下的负序补偿能力,增强并网适应性。建议研发团队在多电平拓扑的控制算法中引入该优化策略,以提升产品在电网故障穿越及不平衡负载下的性能表现。