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Time synchronization method and time synchronization system based on NTP (network time protocol) network

A network and time technology, which is applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problem that the clock cannot be accurate to the second, and achieve the effect of improving accuracy and timing accuracy

Active Publication Date: 2015-03-11
STATE GRID CORP OF CHINA +2
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Problems solved by technology

Neither of the above 2 methods can make the clock accurate to the second

Method used

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  • Time synchronization method and time synchronization system based on NTP (network time protocol) network
  • Time synchronization method and time synchronization system based on NTP (network time protocol) network
  • Time synchronization method and time synchronization system based on NTP (network time protocol) network

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Embodiment Construction

[0040] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] The present invention comprises the following steps:

[0042] a) The master station sends a request to query the precise clock to the terminal, and records the time when the request is sent;

[0043] b) The terminal receives a query precision clock request from the master station;

[0044] c) The terminal replies to the master station's request for querying the precise clock, and the reply request includes the time when the terminal receives the request for querying the precise clock and the time when the reply is sent;

[0045] d) The master station receives the request reply sent by the terminal, and records the time when the request reply is received, and repeats a), b), c), and d) until the number of repetitions reaches the set number of times;

[0046] e) The master station calculates the network transmission time from ...

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Abstract

The invention discloses a time synchronization method and a time synchronization system based on an NTP network, and relates to a time synchronization method and a time synchronization system. Currently network communication time is compensated through a network, so as to reduce error during timing, but a clock can not be accurate to seconds. The method comprises the following steps: a main station sends a request for inquiring an accurate clock to a terminal; the terminal responds to the request for inquiring an accurate clock of the main station; the main station records the time for receiving the request response and repeats the previous step; the main station computes the time of network transfer from the main station to the terminal, and sends a request for modifying the time deviation to the terminal; the terminal conforms the request and modifies the time; the main station inquires the terminal time; the terminal returns the terminal time to the main station; the main station conforms the correctness of the terminal time, and then sends a timing request to the terminal; the terminal performs time synchronization on a primary meter according to the timing request of the main station; the terminal conforms the time synchronization. The technical scheme improves the time synchronization precision, obtains the accurate occurrence time of instantaneous data, such as load, voltage, current and the like, and improves the correctness of time-of-use electricity price computation.

Description

technical field [0001] The invention relates to a time setting method and a time setting system. Background technique [0002] The electricity consumption information collection system collects the information of the electric energy meter through the terminal, including load, voltage, current and other instantaneous data with strong timeliness. As an electric energy meter, the electric energy meter also requires the clock of the electric energy meter to be as accurate as possible in the era when the time-of-use electricity price is widely used. At present, the more common time synchronization technology between the terminal and the meter is broadcast time calibration, that is, the master station broadcasts the clock to the terminal at the same time, and the terminal modifies its own clock after receiving it, and then the terminal broadcasts the clock to the energy meter to complete the clock calibration of the energy meter. This method does not consider the delay of the net...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00
Inventor 王伟峰范建华麻吕斌徐川子韩威吴亮
Owner STATE GRID CORP OF CHINA
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