A 5G Dual-channel hot standby transmission scheme for power grid control service

In this paper, we propose a 5G dual-channel hot standy transmission scheme for distribution grid differential protection. Two 5G communication links are established for protection devices on both sides, and link delay monitoring heartbeat packets are sent at 1kHz frequency. Protection device can obtain each 5G communication link delay sampling value by monitoring the heartbeat packet round-trip delay. Through the time series analysis technology, one can calculate time delay variation of each 5G communication link. By doing so, we can predict the 5G transmission delay fluctuations caused by variational wireless channel environment. According to the real-time forecast results of each communication link, the protection device can decide to select which 5G link and switch to the better one before the transmission delay deteriorates. The efficient transmission of differential protection can guarantee the instantaneity, reliability and accuracy of fault removal of the distribution grid. As a result, we can improve the quality of power supply service.