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通过挖掘多环控制器固有信息实现星型级联H桥STATCOM的故障检测与穿越

Fault Detection and Ride Through of CHB Converter-Based Star-Connected STATCOM Through Exploring the Inherent Information of Multiloop Controllers

语言:

中文摘要

本文提出了一种针对星型级联H桥(CHB)STATCOM单IGBT开路故障的简易检测与穿越策略。通过改进电流调节器(在直流和基频处具有高增益),并结合电流调节器分支与直流电压平衡调节器的输出信号,实现了故障的快速定位与系统运行的稳健维持。

English Abstract

A simple detection and ride-through operation approach is proposed for star-connected cascaded H-bridge (CHB) converter-based STATCOMs with a single IGBT open circuit fault. It adopts a modified current regulator with high gains at both dc and fundamental frequencies. Then, the output signals of the current regulator branches and the dc voltage balancing regulator are synthesized as an inherent in...
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SunView 深度解读

该技术对于阳光电源的集中式逆变器及大型储能系统(如PowerTitan系列)具有重要参考价值。阳光电源的大功率产品常采用多电平拓扑,IGBT的可靠性是系统长效运行的关键。该研究提出的基于多环控制器固有信息的故障诊断方法,无需额外硬件传感器即可实现故障定位与穿越,有助于提升PowerTitan等大型储能变流器在复杂电网环境下的故障自愈能力,降低运维成本,并增强系统在电网故障下的支撑性能。