Abstract
This article introduces a three-phase trip fault of the main transformer after a single-phase short circuit in the line. First, according to the protection action when the fault occurs, it is preliminarily judged that the trip of the main transformer is a malfunction of the protection device. Secondly, by analyzing the internal principle of the protection device and the device hardware Detect and determine that the cause of the fault is the damage of the AD plug-in of the protection device, and finally put forward corresponding rectification measures for this fault to ensure the reliable and stable operation of the transformer differential protection.
The scientific and technological project number of State Grid Hebei Electric Power Co., Ltd. is kj2020-048; The funding fund number is 20314301D.
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Chen, T., Wang, X., Zhao, Y., Li, T., Li, Z., Hou, Y. (2022). Analysis of a Misoperation of the Ratio Differential Protection of Main Transformer. In: Yang, Q., Liang, X., Li, Y., He, J. (eds) The proceedings of the 16th Annual Conference of China Electrotechnical Society. Lecture Notes in Electrical Engineering, vol 889. Springer, Singapore. https://doi.org/10.1007/978-981-19-1528-4_19
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DOI: https://doi.org/10.1007/978-981-19-1528-4_19
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