Method, device and system for carrier synchronization

Abstract

The embodiment of the invention provides a method, a device and a system for carrier synchronization, relating to the communication field. The method, the device and the system are capable of solving the problem that the carrier cannot synchronize when a single-point failure appears, realizing the seamless changeover of carrier synchronization signals in failure, and improving the stability and reliability of the system. The carrier synchronization method comprises the following steps: receiving a main carrier synchronization signal sent by a first mainframe according to a preset period, and adjusting an own carrier signal according to the main carrier synchronization signal, so that the own carrier signal is synchronized with the main carrier synchronization signal; receiving a backup carrier synchronization signal from a second mainframe, wherein a backup carrier synchronization signal is sent after the second mainframe receives the main carrier synchronization signal sent according to the preset period; the backup carrier synchronization signal is synchronized with the main carrier synchronization signal; if the main carrier synchronization signal from the first mainframe is not received within the preset period, the own carrier signal is adjusted according to the backup carrier synchronization signal, so that the adjusted own carrier signal is synchronized with the main carrier synchronization signal.

Description

technical field [0001] The present invention relates to the communication field, in particular to a carrier synchronization method, device and system. Background technique [0002] In the paralleling of inverter power modules, in order to control the impact of high-frequency circulating current on the circuit system, we often use the carrier synchronization method to control it. Among them, carrier synchronization (Carrier Synchronization) refers to the amplitude demodulation of adding the frequency and phase of the modulated signal, and the same sinusoidal oscillation as the carrier component, that is, to achieve coherent demodulation, so that the receiving end produces the same signal as the transmitting end. Techniques and methods for same-frequency and same-phase signals. [0003] The prior art method to achieve carrier synchronization of parallel modules is that the master sends out a carrier synchronization signal, and other slaves capture the synchronization signal a...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a carrier synchronization method, device and system, which can solve the problem that the carrier cannot be synchronized when a single point of failure occurs, realize seamless switching of the carrier synchronization signal when a failure occurs, and further improve the stability and reliability of the system sex

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