Power system time synchronization method and device and power system thereof

Abstract

The embodiment of the invention relates to a power system time synchronization method and a device and a power system thereof; wherein, the power system time synchronization method comprises the following steps: air time source is used as a first time synchronous reference; if the air time source is out of order, a second time synchronous reference is switched to, and the second time synchronous reference is obtained from the signal sent by a transmission network. In the power system time synchronization method, device and power system, uniform time synchronization network is set up by setting the uniform time synchronous reference; meanwhile, the second time synchronous reference of the transmission network is applied in the power system and the second time synchronous reference is used as time keeping back-up, thus ensuring the diversification of the time synchronous reference and avoiding the risk of low time keeping precision caused by using single satellite time.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of telecommunications, and in particular, to a power system time synchronization method, device, and power system. Background technique [0002] With the development of science and technology, many systems have higher and higher requirements for time accuracy and synchronization. The so-called time synchronization means that the time used by each synchronization node is synchronized with the Coordinated Universal Time (UTC). There are often a large number of time synchronization requirements in the fields of telecommunications and electric power. For example, in the field of telecommunications, all network management servers need to use the same time for logging and fault location; there are many automation equipment and protection devices in power systems that require microsecond-level synchronization. Time; the realization of time synchronization is generally to obtain UTC time throug...

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Problems solved by technology

Therefore, there are many defects in the above method, for example, all time references are dependent on GPS, and GPS time is affected by various factors such as weather factors, and the time synchronization is not guaranteed. If there is a GPS signal failure, the synchronization quality will be reduced; all Sites are quasi-synchronous, and there is no unified time synchronization network to achieve network-wide synchronization; GPS receivers are widely used and cannot be shared among sites, resulting in a serious waste of resources; In addition, there are many types of time devices on the live network with different standards, and most of them cannot be included in the network management. Only manual on-site maintenance is required, resulting in reduced time synchronization and reliability

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