Research on Transmission Method Suitable for Synchronous Wide-Frequency Measurement

Aiming at the wide-frequency oscillation problem existing in new energy grid-connected and HVDC power transmission, it is imperative to incorporate the wide-frequency measurement results into the Wide Area Measurement System(WAMS) on the basis of the Phasor Measurement Unit (PMU). In this paper, the status of research for wide-frequency oscillation measurement communication transmission is described in detail, and then a transmission method suitable for wide-frequency measurement data is proposed. Firstly, the dual- channel communication of wide-frequency master and substations is adopted to decouple the transmission channel of synchrophasors and wide-frequency data, so as to reduce the transmission rate for synchrophasors. Secondly, wide-frequency data is refreshed at different intervals on the basis of the running status of the power grid, which effectively reduces the real-time data flow between wide-frequency master and substations, reduces the communication burden, and improves the reliability of data transmission. The practicability and effectiveness of the method are verified by simulation in the end.