具有混合输电线路的HVDC电网的低复杂度基于图的行波模型：在故障识别中的应用
Low-complexity graph-based traveling wave models for HVDC grids with hybrid transmission lines: Application to fault identification
摘要：
网状HVDC电网的快速保护要求对故障后影响电网的暂态现象进行建模。在包括高架和地下部分的混合线路的情况下，可能难以描述和评估大量生成的行波。本文提出了一种表示的网格作为一个图形，允许考虑任何波通过网格。一个相对紧凑的描述的波，然后推导出，结合物理和行为建模方法的基础上。所获得的模型取决于明确的电网的特性，以及故障参数。提出了一种应用该模型识别混合线路的故障部分。故障部分的知识是有益的，因为架空线路中的故障（通常是暂时的）可以导致线路的重合闸。
英文摘要：
The fast protection of meshed HVDC grids requires the modeling of the transient phenomena affecting the grid after a fault. In the case of hybrid lines comprising both overhead and underground parts, the numerous generated traveling waves may be difficult to describe and evaluate. This paper proposes a representation of the grid as a graph, allowing to take into account any waves traveling through the grid. A relatively compact description of the waves is then derived, based on a combined physical and behavioral modeling approach. The obtained model depends explicitly on the characteristics of the grid as well as on the fault parameters. An application of the model to the identification of the faulty portion of an hybrid line is proposed. The knowledge of the faulty portion is profitable as faults in overhead lines, generally temporary, can lead to the reclosing of the line.
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