Low-frequency power line carrier topology identification method

Abstract

The invention discloses a low-frequency power line carrier topology identification method, which comprises the following steps of: 1, continuously carrying out continuous voltage sampling, and simultaneously carrying out parallel processing on sampling data at a previous moment in an assembly line mode; 2, performing high-density data analysis on the sampled data by adopting a method based on an FFT (Fast Fourier Transform) convolutional neural network; 3, averaging analysis results of the multiple sliding window data, and taking an averaged frequency spectrum module value as a judgment basis of a carrier signal; 4, step classification is carried out according to the frequency spectrum module value amplitude of the signals, and 16-bit modulation signal codes are output; the signal detection mode based on the FFT convolutional neural network can utilize the effective duration of the modulation signal to the maximum extent, and the interference of the power line noise on the modulation signal is reduced and the topology identification monitoring accuracy is improved by using the mode of combining the digital filter and the multi-sliding window FFT average.

Description

technical field [0001] The invention belongs to the technical field of power line carrier communication, and in particular relates to a low-frequency power line carrier topology identification method. Background technique [0002] Power line carrier communication is a way of using power lines as high-frequency signals to communicate in the transmission channel. Because it transmits high-frequency weak current signals and low-frequency large currents together, it does not need to lay special power supply circuits. It is used in smart homes, smart buildings, and automatic copying. Tables and many other fields have been widely used. In the field of power line carrier communication, network topology analysis is based on the division of busbars and electrical islands based on the switch status of the power grid. This technology is the basic module of power grid dispatching automation, energy management systems, and power distribution management systems. The traditional topology ...

AI Technical Summary

Problems solved by technology

The traditional topology identification technology generally uses a switch network to cooperate with a specific voltage and current detection module to identify, and the information transmitted is limited, which is not conducive to the rapid update of topology information.

The use of carrier communication can achieve richer information transmission, but the detection of carrier signals is relatively complicated, because the noise on the power line is strong, which constitutes a strong interference to the modulated carrier signal

[0003] At present, the analysis of the carrier signal mainly adopts the FFT method. The traditional FFT carrier parameter measurement method has the disadvantage of sacrificing the frequency resolution and has strict restrictions on the number of points and cycles of data sampling.

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