Improving the Differential Protection of Power Transformers Based on Fuzzy Systems

2021 IEEE 2nd KhPI Week on Advanced Technology (KhPIWeek) Pub Date : 2021-09-13 DOI:10.1109/KhPIWeek53812.2021.9570102

Masoud Dashtdar, O. Rubanenko, O. Rubanenko, Seyed Mohammad Sadegh Hosseinimoghadam, Y. Belkhier, Mohit Baiai

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引用次数: 1

Abstract

One of the causes of unwanted interruption in power transformers is its magnetizing inrush current. Due toits current conditions, this current causes the differential relay to misdiagnosis the internal fault of the transformer and leads to an incorrect cut-off command. In this paper, fuzzy systems are using to improve the differential protection of the transformer and to stabilize it against magnetizing inrush current. The basis of the proposed algorithm is that if the cut-off command is sending by the differential relay, by applying Clarke transform to the differential current and using fuzzy logic, the decision to send the cut-off command to the protection relays is made. The proposed algorithm is applying to a sample of the substation transformers model in Iran. The network is simulating in PSCAD/EMTDC software and the output of the simulation is transferring to MATLAB software to apply the proposed algorithm. The simulation results show the efficiency of the proposed algorithm in improving the differential relay.

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基于模糊系统改进电力变压器差动保护

电力变压器产生意外中断的原因之一是其励磁涌流。由于其电流状况，该电流导致差动继电器误诊变压器内部故障并导致错误的截止命令。本文采用模糊系统来改善变压器的差动保护，稳定变压器对励磁涌流的影响。该算法的基础是，如果截止命令由差动继电器发送，则通过对差动电流进行Clarke变换，并采用模糊逻辑，做出将截止命令发送给保护继电器的决定。该算法已应用于伊朗某变电站变压器模型的实例。在PSCAD/EMTDC软件中对网络进行仿真，并将仿真结果传送到MATLAB软件中应用所提出的算法。仿真结果表明了该算法在改进差动继电器方面的有效性。

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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来源期刊

2021 IEEE 2nd KhPI Week on Advanced Technology (KhPIWeek)

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