Clock synchronization method and system based on HPLC communication network delay correction

Abstract

The invention discloses a clock synchronization method and system based on HPLC (High Performance Liquid Chromatography) communication network delay correction. The method comprises the following steps: a CCO requests a clock from a concentrator; the CCO module accurately synchronizes a clock to the STA module; an STA module obtains local clocks from various base meters; and the STA makes a corresponding timing strategy according to the comparison between the clock of the STA and the clock of the base table. According to the acquisition system clock synchronization method and system based on the HPLC carrier communication network, the clock of the concentrator can be accurately synchronized to a branch box monitoring unit, a meter box monitoring unit, an electric energy meter and other levels of acquisition equipment, microsecond-level synchronization of all acquisition equipment clocks in a low-voltage transformer area is realized, and each level of acquisition equipment acquires and freezes power grid parameters according to the own clock, so that the time deviation of the curve data of each time point is far less than the time deviation of the curve data of an original acquisition system.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a clock synchronization method and system based on HPLC communication network delay correction. Background technique [0002] The acquisition system in the low-voltage station area mainly includes equipment such as concentrators, branch box monitoring terminals, meter box monitoring terminals, and electric energy meters. The above-mentioned equipment realizes data interaction through HPLC carrier communication. At present, the clock synchronization and precise management between the concentrator and the electric energy meter in the low-voltage station area rely on the low-latency characteristics of HPLC and the broadcast timing mechanism, and the precise broadcast timing service is designed. It is generally believed that the broadcast delay of HPLC can be ignored . [0003] This precise clock management solution is based on HPLC carrier communication, which can synchronize...

AI Technical Summary

Problems solved by technology

[0004] The existing technology has the following deficiencies: the segmental calculation of line loss, loop impedance calculation and early warning, big data calculation and other functions such as line loss topological relationship, which are currently being vigorously promoted, all cause deviations in calculation results due to the inability to synchronize the internal clocks of all levels of equipment For the realization of functions such as topological big data calculation of line change household relationship in the station area, segmentation and refinement of line loss, and effective judgment of loop impedance, there is a higher demand for clock accuracy

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