In response to the low detection sensitivity of high-frequency current method for detecting partial discharge faults in cable intermediate joints,based on the high sensitivity of capacitive coupling method,finite element method is used to simulate the electromagnetic wave propagation characteristics of partial discharge in cable intermediate joints.The variation law of electric field intensity in three directions at different monitoring points is obtained.At the same time,the attenuation characteristics and spectral characteristics of partial discharge electromagnetic waves are analyzed,and the capacitance sensor is optimized for design,providing reference for the application of capacitance sensors in monitoring partial discharge in cable intermediate joints.
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