Clock Synchronization Automatic Checking Method for Power Grids
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Solution Overview
Problem
Existing clock synchronization systems in intelligent power grids fail to automatically switch to a backup GPS signal source when the Beidou signal source fails, leading to clock information faults and serious consequences.
Innovation Solution
An automatic checking method that regularly acquires clock signals from Beidou, GPS, and SNTP signal sources, evaluates differences, and switches to a secondary source or triggers an alarm when differences exceed a preset value, ensuring consistent and accurate clock synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the system uses a single Beidou signal source for clock synchronization, then the device complexity is reduced, but the reliability deteriorates when the Beidou signal source fails
Solution Approach 1:
The system pre-configures multiple clock signal sources (Beidou, GPS, SNTP) and establishes their priority relationships in advance. When the primary Beidou signal source fails, the system can immediately switch to the secondary GPS or SNTP sources without requiring complex real-time decision-making, thus maintaining reliability while keeping the system structure relatively simple.
Solution Approach 2:
The system dynamically changes the operating state of different clock signal sources based on signal quality parameters. By monitoring parameters such as signal availability and synchronization accuracy, the system can switch between Beidou, GPS, and SNTP sources to maintain optimal clock synchronization reliability under varying conditions.
2Reliability
If the system implements automatic switching between multiple signal sources, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The system pre-configures multiple clock signal sources (Beidou, GPS, SNTP) and establishes their priority relationships in advance. When the primary Beidou signal source fails, the system can immediately switch to the secondary GPS or SNTP sources without requiring complex real-time decision-making, thus maintaining reliability while keeping the system structure relatively simple.
Solution Approach 2:
The system continuously monitors the status of multiple clock signal sources and automatically switches between them based on real-time feedback regarding signal quality and availability. This feedback mechanism enables reliable automatic switching without requiring overly complex manual intervention systems.
3Reliability
If the system monitors multiple clock signal sources continuously, then the reliability is improved, but the use of energy increases
Solution Approach 1:
The system performs periodic monitoring and evaluation of multiple clock signal sources at predetermined intervals (e.g., every 50 milliseconds) rather than continuous monitoring. This periodic action maintains synchronization reliability by detecting signal failures in a timely manner while significantly reducing the energy consumption associated with constant signal acquisition and processing.
Data Source
AI summary
The invention relates to an automatic checking method for clock synchronization, comprising the following steps: (1) regularly acquiring clock signals sent by a Beidou signal source, a GPS signal source and an SNTP signal source; (2) performing subtraction to the clock signals of the Beidou signal source and the GPS signal source and evaluating the absolute value of the difference; at the same time, performing subtraction to the clock signals of the Beidou signal source and the SNTP signal source and then evaluating the absolute value of the difference and finally judging the results of the two differences; and (3) constantly repeating steps (1) and (2). The operations in the present invention can efficiently avoid the problems in the existing technology, guarantee the consistency and accuracy of system time, and guarantee the stable and safe operation of the system and the normal operation of other power grid businesses.