三绕组变压器模型对矿井电力系统分析与保护的影响

Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting Pub Date : 1993-10-02 DOI:10.1109/IAS.1993.299221

M. Oommen, J. Kohler

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引用次数: 8

摘要

研究了准确的三绕组变压器模型对矿井电力系统分析的影响。虽然电压调节的差异很小，但三绕组变压器的增强表征严重影响了稳态和第一周期故障分析的结果。在矿山电力系统的战略位置，故障电流的大小可能被低估多达60%。这直接影响到矿用电力系统中保护协调装置的选择和尺寸。绕组温度的影响也很重要，但其值与正确表示的四母线三绕组变压器模型的计算值相差不大

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Effect of three-winding transformer models on the analysis and protection of mine power systems

The impact of accurate, three-winding transformer models in the analysis of mine power systems is examined. Though the disparity in voltage regulation is minimal, the enhanced representation of three-winding transformers seriously affects the results of both steady-state and first-cycle fault analysis. Fault current magnitudes could be underestimated by as much as 60% at strategic locations in the mine power system. This directly affects the choice and sizing of protective and coordination devices used in mine power systems. The effect of winding temperature is also important, but the values do not vary too much from values computed for correctly represented, four-bus, three winding transformer models.<>

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Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting

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