论文标题
基于模态分析的MMC-HVDC系统的多末端DC故障识别 - 局部保护方案
Multi-Terminal DC Fault Identification for MMC-HVDC Systems based on Modal Analysis -- A Localized Protection Scheme
论文作者
论文摘要
我们提出了一种基于多末端模块化多层转换器（MMC）高压直流（HVDC）系统中模态分析的局部保护方案。本文解决了基于局部保护方案的DC故障识别的问题，例如在系统中，将外部和内部故障区分出外部和内部故障的分类，即对极点到极点（\ textit {ptp}）或对地面（\ textIt {ptg}）的分类（\ textit {ptg}），以使系统中的高障碍物（hifs（hifs））。该方案在多末端MMC-HVDC系统的等效网络中用于DC故障，使用相模式转换在存在故障阻力的情况下，在当前限制反应器（CLR）上分析了线模式和零模式电压。在测量中，保护方案已被验证为HIF和白色高斯噪声（WGN）的可靠性。对于不同的故障位置，故障电阻和系统瞬变，该方案操作已被验证为完整的。
We propose a localized protection scheme based on modal analysis in multi-terminal modular multilevel converter (MMC) based high voltage DC (HVDC) systems. The paper addresses the issues of localized protection scheme based DC fault identification, such as differentiating between external and internal faults, classification of type of fault contingency i.e., pole to pole (\textit{PTP}) or pole to ground (\textit{PTG}) for high impedance faults (HIFs) in the system. The scheme works on equivalent network of multi-terminal MMC-HVDC system for a DC fault, using phase-modal transformation to analyse line-mode and zero-mode voltage across the current limiting reactor (CLR) for different possible contingencies in the presence of fault resistance. The protection scheme is validated to be reliable for HIFs and in the presence of White Gaussian Noise (WGN) in measurement. The scheme operation is validated to be intact for varying fault location, fault resistances and system transients.
