No-signal small hydropower terminal remote communication and online verification scheme research

Abstract

The invention discloses a no-signal small hydropower terminal remote communication and online verification scheme research, and relates to the technical field of communication. The research comprises the following schemes: increasing transmitter power, adopting high-precision SMG sampling, and adopting a free networking technology, a re-filtering technology and an adaptive error correction and deviation rectification technology. According to the invention, the problem of signal attenuation caused by insufficient power can be effectively solved through a power adaptive lifting technology, and automatic adjustment can be realized through combined application with a relay; a receiver adopts SMG to perform sampling on received signals, so that a sampling success rate and a modulation success rate are improved; the self-healing performance and reliability of a communication network are improved through the self-healing networking capability; influences of channel noise are weakened by adding a receiving filter; the power of the receiver is reduced, and the carrier communication capability is improved; and by introducing a channel coding technology, the capability of correcting random error codes and the capability of correcting large-area sudden error codes are achieved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to the research on remote communication and online verification schemes of non-signal small hydropower terminals. Background technique [0002] The medium voltage carrier device is the realization equipment of 10kV power line communication, it has digital signal interface and carrier signal interface. The digital signal interface can be connected with upstream communication equipment such as ONU, industrial Ethernet switch, switch and wireless communication module, and can also be connected with terminal devices such as power distribution automation terminal and power consumption information collection terminal. The carrier signal interface can be connected to the coupling device, and then inject the carrier signal into the phase line of the 10kV power line through the coupling device. The application of the 10kV medium voltage carrier communication technology currently has t...

AI Technical Summary

Problems solved by technology

[0003] 1) Carrier signal attenuation problem: According to the transmission line theory, the effect of wave impedance, the carrier signal continues to oscillate and attenuate along the distribution line, and the longer the transmission distance, the greater the attenuation; 10kV power line channels are complex and changeable, and the signal attenuation is very common , which will cause the signal at the receiving end to be relatively weak; the communication success rate is low due to time-varying. The failure of a relay node will also cause changes in the network structure, which will cause the communication failure between the source node and the destination node in the carrier communication system

However, due to the wide spectrum range of background noise, the receiving signal-to-noise ratio of carrier communication is greatly affected

Especially when the communication distance is long, the carrier signal attenuates greatly, and the receiving signal-to-noise ratio of carrier communication is low, resulting in random bit errors

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