A Novel Multi-Parallel Power Frequency Communication Technology

Abstract

Abstract. Power line frequency communication technology using the small distortion about the grid voltage and current waveform to carry information, and cross the transformer remote communication, suitable for line structure and load characteristics in distribution network. It has the advantages of low cost, easy installation, free communication and so on. But the power line frequency communication there is a low rate of defects, and the traditional modulation and demodulation are based on the local voltage zero, because the transceiver system voltage phase difference caused by receiving time domain deviation, which seriously affect the communication performance. This paper established a multi-channel signal transmission model based on the technical mechanism of frequency communication. We use single-phase multi-channel, three-phase transmission, multi-feeder parallel transmission and other means to improve the communication rate, At the same time, this paper based on time-frequency analysis to determine the frequency domain communication signal modulation time domain, combined with a variety of anti-jamming measures, which can adapt to the distribution network voltage difference between nodes, thereby enhancing communication performance.