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| Design of non-intrusive intelligent monitoring terminal for secure power usage |
| YU Wuqiang, MA Xiao, WANG Zhimin, YANG Hongxiang, SU Zhicheng |
| Lijiang Power Supply Bureau of Yunnan Power Grid Co., Ltd, Lijiang, Yunnan 674100 |
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Abstract A non-intrusive intelligent monitoring terminal for secure power usage is designed to address safety incidents such as short circuits, leakage, and electric bicycle charging that can easily trigger tripping and fire. Precision resistance voltage divider and high-precision zero flux current sensor are used to achieve voltage and current analog signal measurement, and high harmonic characteristics are fully preserved through 10kHz high-frequency sampling. Using dual core Cortex-A9 ARM and Xilinx Artix7 FPGA as information processing units, they can simultaneously process six channel high-frequency sampling signals. Abnormal power usage characteristics of short circuits, leakage and electric bicycle charging are studied. Non-intrusive abnormal electricity usage identification software is developed based on convolutional neural network model. Testing results show that the designed intelligent monitoring terminal can accurately identify the above typical abnormal power usage events.
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Received: 27 October 2023
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2024, Vol. 25 
