基于零序电压的三峡电站水轮发电机定子接地保护方案分析

2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077) Pub Date : 2000-01-23 DOI:10.1109/PESW.2000.847641

N. Tai, Xianggen Yin, Deshu Chen

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引用次数: 9

摘要

本文利用大型水轮发电机零序电压匝数的新数学模型，研究了水轮发电机定子接地故障保护方案。利用保护覆盖-临界电阻曲线对几种定子接地保护方案的特性进行了评价和比较。仿真结果表明，这些方案应用于三峡电站大型水轮发电机组时灵敏度较低。为了克服这一缺点，本文提出了基于故障分量的高灵敏度接地故障保护方案。

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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Analysis of stator ground protection schemes for hydro-generator of Three-Gorges power plant based on zero sequence voltages

New mathematical models for the zero-sequence voltage of large hydro-generator on turn basis are used to study hydro-generator stator ground fault protection schemes in this paper. The evaluation and the comparison of the characteristics of some stator ground protection schemes are described by means of protection coverage-critical resistance curves. And the simulation results showed that those schemes would suffer low sensitivity when they are used to huge hydro-generators in Three-Gorges power plant. To overcome this disadvantage, new ground fault protection schemes with higher sensitivity based on fault components are developed in this paper.

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来源期刊

2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)

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