The invention discloses a power supply communication method and device based on power line carrier communication, and relates to the technical field of power supply communication. Problems of
signal attenuation, insufficient anti-interference capability, insufficient stability of power supply communication, insufficient intelligent
path switching capability and the like exist in the prior art. According to the method, high-sampling-rate PSD analysis, STFT and LSTM are adopted to predict
noise power
time sequence data, and a
noise-load rate
coupling model is established; secondly, based on a
transmission line theory, researching channel time-varying characteristics, calculating
signal reflection and multipath effects, and calculating channel
coherence time through a sliding window; for
signal attenuation, low, medium and
high frequency band models are respectively established, path attenuation is calculated, and
channel capacity is optimized; and finally, through real-time stability analysis, short-term and long-term SNR stability is calculated, and path selection is optimized in combination with a load rate, so that
communication quality is ensured. And through integration of channel modeling, time-varying analysis and path optimization, the reliability and stability of power line carrier communication are improved.