Power network global position system (GPS)\big dipper dual system satellite synchronous clock system

Abstract

The invention discloses a power network global position system (GPS)\big dipper dual system satellite synchronous clock system. A big dipper GPS is combined with antennas to receive satellite signals. The satellite signals are divided into one channel GPS signals and one channel big dipper signals through a power divider. The obtained GPS signals and the big dipper signals are reference source signals, and the reference source signals and IRIG-B signals are sent to a synchronous clock device, a timing module of the synchronous clock device switches and selects the reference source signals, closed-loop control is carried out on a local oscillator part, and electric power clock signals are output in the end. The passive big dipper time service technique, the high-accuracy phase measurement technique and the multi-channel clock lossless switching technique are utilized to finish and achieve the synchronous clock which uses a big dipper, GPS dual satellite system as time reference. A synchronous clock technique index meets technical parameter requirements of power grid joint debugging to a clock. Technical status that an inland current power grid time synchronizing system overly depends in on a GPS system, and safety and reliability of the power grid time synchronizing system are improved.

Description

technical field [0001] The invention relates to an electric clock, in particular to an electric clock system based on the second generation of Beidou. Background technique [0002] my country's power grid construction investment has been insufficient for a long time, and the development of power grids has seriously lagged behind the development of power sources. In recent years, the speed of power supply construction and commissioning has accelerated, which has exacerbated the contradiction of grid lag. Insufficient investment has caused the current structure of my country's power grid to be weak, the power grid is stuck, some equipment is outdated, there are many hidden dangers, and the ability to resist natural disasters is poor, which seriously restricts the safe and stable operation of the power grid. The risk of large-scale power outages in my country's power grid always exists. In recent years, there have been relatively large blackouts in the world, and they have occ...

AI Technical Summary

Problems solved by technology

The GPS system is controlled and operated by the U.S. military. The U.S. military can control the signals in specific areas at any time, and can scramble or close the signals in specific areas, which will greatly reduce or fail the performance of the GPS receiving system. The safety and reliability of the system relying on GPS signal equipment has left a very big hidden danger

For example, in a military exercise conducted by our country in the southeast coast in a certain year, the United States interfered with the GPS signal in the area, causing the equipment using the GPS signal in the area to fail to work normally, the navigation and positioning equipment to fail, the time-frequency synchronization equipment to fail or degrade, fix and The mobile communication system cannot work normally, the time of power dispatching equipment is out of order, and the GIS cannot work normally, etc.

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