Research on Fault Detection Scheme for Hybrid LCC-MMC System

Xinxin Song, Shitao Wang, Xiaowei Dong
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引用次数: 1

Abstract

Compared with AC distribution network, DC distribution network has economic and technological advantages in many fields, but the access of high-density distributed power brings a huge challenge to the fault detection of the distribution network. The power electronic equipment contained in the DC distribution network is susceptible to the impact of inrush current, and a fast fault detection solution is urgently needed. In addition, influencing factors such as line distributed capacitance, synchronization error, and noise interference reduce the reliability of traditional fault detection schemes. A detection scheme based on wave impedance Minkowski distance is proposed to improve the existing technology. The program uses the Minkowski distance measurement to measure the correlation of wave impedance, and then identify internal and external faults. Theoretical analysis and simulation results show that the detection scheme based on Minkowski distance has high reliability and obvious advantages.
LCC-MMC混合系统故障检测方案研究
与交流配电网相比,直流配电网在许多领域具有经济和技术优势,但高密度分布式电源的接入给配电网的故障检测带来了巨大的挑战。直流配电网中包含的电力电子设备易受涌流冲击,急需一种快速的故障检测解决方案。此外,线路分布电容、同步误差、噪声干扰等影响因素降低了传统故障检测方案的可靠性。针对现有检测技术的不足,提出了一种基于波阻抗闵可夫斯基距离的检测方案。该程序采用闵可夫斯基距离测量法来测量波阻抗的相关性,进而识别内部和外部故障。理论分析和仿真结果表明,基于闵可夫斯基距离的检测方案可靠性高,优势明显。
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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