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Requirement analysis of hybrid direct current breaker in multi-terminal high-voltage direct current grids

机译:多端子高压直流电网中混合式直流断路器的需求分析

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Hybrid direct current circuit breakers (DCCB) are the most adopted solution to clear high DC fault currents in short time. Existing literature does not analyse recently validated commercial breakers. This article provides an overview about hybrid DCCB and a list of criteria to evaluate and compare the performance of existing or new DCCB designs. Additionally, general measures are proposed to assess the suitability of the DCCB in a specific grid situation. Accordingly, the fault current evolution under pole-to-pole faults in different parts of a multi-terminal DC grid is analysed by means of mesh analysis with matrix differential equations. Finally, a grid parameter variation analysis is carried out through PSCAD-EMT simulations to compare the presented DCCB concepts.
机译:混合直流断路器(DCCB)是在短时间内清除高直流故障电流的最常用解决方案。现有文献没有分析最近验证的商业断路器。本文提供了有关混合DCCB的概述以及评估和比较现有或新DCCB设计性能的标准列表。此外,建议采取一般措施来评估DCCB在特定电网情况下的适用性。因此,借助带有矩阵微分方程的网格分析,分析了多端子直流电网不同部分在极间故障下的故障电流演变。最后,通过PSCAD-EMT仿真进行了网格参数变化分析,以比较提出的DCCB概念。

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