High-precision clock synchronization method for 5G smart power grid
A high-precision clock and smart grid technology, applied in the field of communication, can solve the problems of not being able to meet the synchronization accuracy requirements of the smart grid system, low implementation costs, etc., and achieve the effect of large frequency traction capability and high clock output accuracy
Pending Publication Date: 2022-04-12
HENNAN ELECTRIC POWER SURVEY & DESIGN INST
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[0004] The IEEE1588 protocol is formulated by the IEEE1588-2002 standard, referred to as the PTP protocol. Due to its good versatility and low implementation cost, the PTP protocol is the mainstream precise clock synchronization protocol in the construction of 5G smart grids. However, the PTP protocol only specifies the basic clock synchronization algorithm. In some time-sensitive networks, the synchronization accuracy requirements of smart grid systems are often not met
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[0059]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0060] The embodiment of the present invention discloses a high-precision clock synchronization method for 5G smart grid, such as figure 1 shown, including the following steps:
[0061] S1. Time difference measurement: Obtain the clock phase deviation of the master and slave nodes, and obtain the clock frequency deviation and clock drift according to the clock phase difference;
[0062] S2. Clock state filtering: filter and estimate according to the clock phas...
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The invention discloses a high-precision clock synchronization method for a 5G smart power grid, and the method comprises the following steps: time difference measurement: obtaining the clock phase deviation of a master node and a slave node, and obtaining the clock frequency deviation and clock drift according to the clock phase difference; performing clock state filtering: performing filtering estimation according to the clock phase deviation, the clock frequency deviation and the clock drift; time difference feedback control: based on filtering estimation, outputting feedback control quantity of phase and frequency of a slave node clock through a PI controller; the FLL assists the PLL and outputs a target clock, and the FLL assists the PLL to output the target clock by using the feedback control quantity of the phase and the frequency of the slave node clock so as to keep synchronous with the master clock; clock synchronization errors are effectively restrained, nanosecond-level clock synchronization precision between the master node and the slave node is achieved, and the method can be widely applied to intelligent power grid scenes such as power distribution network differential protection, line inspection, power distribution automation and video monitoring.
Description
technical field [0001] The present invention relates to the field of communication technologies, and more specifically relates to a high-precision clock synchronization method for 5G smart grids. Background technique [0002] At present, the State Grid is vigorously promoting the construction of smart grids, and there is an urgent need to build a "ubiquitous, full-coverage" power communication network that is safe, reliable, flexible in access, and two-way real-time interaction; 5G communication is characterized by its large bandwidth, low With many advantages such as reliability, wide connection, and ubiquitous network, it can meet the needs of smart grids. 5G+ smart grids have broad promotion space. [0003] The 5G smart grid needs a unified time reference and accurate time information to escort the realization of the "hub, platform, and open" power Internet of Things, and the accuracy level of the clock synchronization system is related to the smart grid, including contro...
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IPC IPC(8): H04L7/033H02J13/00
Inventor 王轩韩子媛秦靖尧王瞧牛群峰黄殿勋
Owner HENNAN ELECTRIC POWER SURVEY & DESIGN INST