The invention relates to the technical field of
Internet of Things, in particular to an
electric energy meter with a
wireless communication module, which comprises a parameter acquisition module, a communication optimization module, an interference analysis module, a fluctuation evaluation response module and a load classification module. According to the invention, a mutual
inductor captures a single-phase circuit
signal, analog-to-
digital conversion is combined to realize parameter quantization, interference is eliminated based on an active power identification
algorithm, a structured parameter set is integrated, a
wavelet packet
decomposition parameter and a quantization threshold are dynamically adjusted according to a load rate, and
spread spectrum factor configuration is adopted to improve channel efficiency. The method comprises the following steps: extracting key features by using
wavelet packet characteristics; continuously monitoring
voltage fluctuation by a sliding window; detecting and identifying an instantaneous interference event by a break variable; inhibiting
noise by Kalman filtering and predicting a trend; and the performances of the
system in the aspects of acquisition precision, transmission efficiency,
interference immunity and detection sensitivity are enhanced.