发电机定子3I0保护故障接地引起电缆保护原因分析

2021 IEEE 4th International Conference on Automation, Electronics and Electrical Engineering (AUTEEE) Pub Date : 2021-11-19 DOI:10.1109/AUTEEE52864.2021.9668836

Xian Zhang, X. Jin, Huipeng Gao, Jun Qiao, Dong Wei, Kaijie Xing, Peiyuan Yang, G. Wang, Mingyong Zheng, Xianbo Li

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引用次数: 0

摘要

分析了QFW-15-2型无刷励磁同步发电机定子3i保护故障的原因，阐述了保护装置运行后事故处理的一般过程，论证了电力电缆屏蔽层保护接地点在零序电流互感器位置以上接地的潜在危害;分析了单芯电缆屏蔽层两端同时接地产生零序电力变压器感应电流的原因，进一步验证了单芯电缆屏蔽层感应电流引起定子3I0保护故障的可能性。

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Cable Protection Caused by Grounding Cause Analysis of Generator Stator 3I0 Protection Malfunction

This paper analyzes the causes of stator 3I0 protection malfunction of QFW-15-2 brushless excitation synchronous generator, expounds the general process of accident treatment after the protection device operates, demonstrates the potential harm of grounding of power cable shielding layer protection grounding point above zero-sequence current transformer position, analyzes the causes of zero-sequence power transformer induced current caused by simultaneous grounding of both ends of single-core cable shielding layer, and further verifies the possibility of stator 3I0 protection malfunction caused by induced current of single-core cable shielding layer.

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来源期刊

2021 IEEE 4th International Conference on Automation, Electronics and Electrical Engineering (AUTEEE)

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