Low-voltage transformer area acquisition equipment clock synchronization method based on HPLC carrier communication

Abstract

The embodiment of the invention discloses a low-voltage transformer area acquisition equipment clock synchronization method based on HPLC carrier communication, and particularly relates to the technical field of communication. The method comprises the following steps: (1) splitting calendar clocks of all acquisition equipment in a low-voltage transformer area into century second and millisecond units; (2) allowing a concentrator to accurately synchronize the clock of a CCO module; (3) allowing the CCO module to accurately synchronize the clock to a STA module; and (4), allowing the STA moduleto accurately synchronize the clocks of the various base tables. The invention discloses a clock synchronization method for the low-voltage transformer area acquisition equipment based on HPLC carriercommunication, the clock of the concentrator can be accurately synchronized to various levels of acquisition equipment such as a branch box monitoring unit, a meter box monitoring unit and an electric energy meter, the millisecond-level synchronization of all acquisition equipment clocks in the low-voltage transformer area is realized, and each stage of acquisition equipment acquires and freezespower grid parameters according to the own clock such that the curve data time deviation of each time point is far less than the curve data time deviation of an original acquisition system.

Description

technical field [0001] The embodiment of the present invention relates to the field of communication technology, and in particular to a clock synchronization method for acquisition equipment in a low-voltage station area based on HPLC carrier communication. Background technique [0002] The collection equipment 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 energy meter in the low-voltage station area rely on HPLC low-latency communication and flexible broadcast timing mechanism, and the precise broadcast timing service is designed. It is generally believed that the broadcast delay of HPLC can be can be ignored. [0003] This precise clock management solution is base...

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Problems solved by technology

[0004] The existing technology has the following deficiencies: However, functions such as segmental calculation of line loss, loop impedance calculation and early warning, and big data calculation of topological relationship between line users and other functions that are being vigorously promoted are all due to the inability of the internal clocks of the equipment at all levels to be synchronized, resulting in the existence of calculation results. Deviation, for the realization of functions such as topological big data calculation of line change household relationship in station area, segmentation and refinement of line loss, effective judgment of loop impedance, etc., the demand for clock accuracy is far from enough

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