CN203800947U

CN203800947U - Automatic verification dedicated device for clock time synchronization

Info

Publication number: CN203800947U
Application number: CN201320605717.XU
Authority: CN
Inventors: 梁伟; 宋维斌; 王楠; 郭凌旭; 徐科; 刘涛; 王峥; 刘畅
Original assignee: State Grid Corp of China SGCC; State Grid Tianjin Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Tianjin Electric Power Co Ltd
Priority date: 2013-09-28
Filing date: 2013-09-28
Publication date: 2014-08-27
Anticipated expiration: 2023-09-28

Abstract

The utility model relates to an automatic verification dedicated device for clock time synchronization. A network module is installed in a housing. The ports of a time synchronization signal comparing module are connected with one ends of a Beidou signal receiving module, a GPS signal receiving module, a network module, a Beidou signal output module, a GPS signal output module, and an alarm and blocking module. The other ends of the Beidou signal receiving module, the GPS signal receiving module, and the network module are connected with a Beidou signal source, a GPS signal source, and a SNTP signal source, respectively. The automatic verification dedicated device can be operated to effectively prevent problems in the prior art and guarantees system time consistency and accuracy, stable and safe system operation, and normal operation of other power grid service.

Description

A kind of clock synchronous to time automatic Verification special equipment

Technical field

The utility model belong to intelligent grid clock synchronous to time technical field, especially a kind of clock synchronous to time automatic Verification special equipment.

Background technology

Along with the intelligentized construction of electrical network; dispatch automated system, power quantity measurement system, load monitoring system, fault wave recording device, microcomputer protective relay device, lightning location system, substation supervisory control system, critical point charging and communication network etc. propose higher requirement to clock synchronous, and safety and stability accurately clock system has become the requisite infrastructure of support intelligent grid safe operation.In power system operation; operation of power networks state is fast changing; and dispatching of power netwoks implementation is layered multi-stage management; control centre is away from scene; therefore just require the time of the interior all electric automatization equipment in power plant or station and microcomputer protecting device to unify, this is significant for electric grid operating, accident analysis (particularly complex accident analysis).

The acquisition of existing conventional reference clock signal is in the following way: by Big Dipper signal receiving module and gps signal receiver module, obtain respectively the output signal in Big Dipper signal source and gps signal source, generally take Big Dipper signal as reference clock signal, by Big Dipper signal output module to all to time signal receiver send reference clock signal, when Big Dipper signal source breaks down, to time signal fusing module drive report to the police and lock modules action, this warning and lock modules send alarm signal to background monitoring system on the one hand, to Big Dipper signal output module, send block signal on the other hand, then to time signal fusing module automatically switch to the output signal in gps signal source, then by GPS output signal module to all to time signal receiver send reference clock signal, if break down in Big Dipper signal source and gps signal source simultaneously, to time signal fusing module drive report to the police and lock modules action, this warning and lock modules send alarm signal to background monitoring system on the one hand, to Big Dipper signal output module and gps signal output module, send block signal on the other hand.

The switching mode of said reference clock signal generally can normally be moved, but in actual use, once there is Big Dipper signal source fault, but to time the signal fusing module gps signal source of not automatically switching, do not drive and report to the police and lock modules action simultaneously yet, this just there will be reference clock signal mistake, causes the clock information mistake at full station, can bring serious consequence.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of clock synchronous rational in infrastructure, easy and simple to handle to time automatic Verification special equipment.

The technical scheme that the utility model is taked is:

Clock synchronous to time an automatic Verification special equipment, comprise Big Dipper signal receiving module, gps signal receiver module, to time signal fusing module, Big Dipper signal output module, gps signal output module and warning and lock modules, described Big Dipper signal receiving module, gps signal receiver module, to time signal fusing module, Big Dipper signal output module, gps signal output module and warning and lock modules are installed in housing, it is characterized in that: a mixed-media network modules mixed-media is also installed in housing, described to time signal fusing module port connect respectively Big Dipper signal receiving module, gps signal receiver module, mixed-media network modules mixed-media, Big Dipper signal output module, one end of gps signal output module and warning and lock modules, described Big Dipper signal receiving module, the other end of gps signal receiver module and mixed-media network modules mixed-media is connected respectively Big Dipper signal source, gps signal source and SNTP signal source, the other end of described Big Dipper signal output module and gps signal output module be all connected a plurality of to time signal receiver reference clock signal input, the other end of described warning and lock modules connects the alarm signal input of background monitoring system, and two block signal outputs of described warning and lock modules connect the block signal input of described Big Dipper signal output module and gps signal output module,

Described Big Dipper signal output module and gps signal output module by optical fiber interface, RJ45 interface or control cables be connected described to time signal receiver.

And described mixed-media network modules mixed-media adopts wireless transmission method or wire transmission mode.

Advantage of the present utility model and good effect are:

In the utility model, by Big Dipper signal source, three clock signals of gps signal source and the output of SNTP signal source are as original clock signal, then Big Dipper signal and gps signal are subtracted to computing, Big Dipper signal and SNTP signal are subtracted to computing simultaneously, two differences are taken absolute value, then compare with preset value, if exceeded, again gps signal and SNTP signal are subtracted to computing, finally according to result judgement using which signal source output clock signal as a plurality of to time signal receiver reference clock signal, aforesaid operations can effectively be avoided the problems of the prior art, consistency and the accuracy of system time have been guaranteed, guaranteed the stable of system, the operation of safety and the normal operation of other electrical network business.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is operational flowchart of the present utility model.

Embodiment

Below in conjunction with embodiment, the utility model is further illustrated, following embodiment is illustrative, is not determinate, can not limit protection range of the present utility model with following embodiment.

Clock synchronous to time an automatic Verification special equipment, as shown in Figure 1, comprise Big Dipper signal receiving module, gps signal receiver module, to time signal fusing module, Big Dipper signal output module, gps signal output module and warning and lock modules, described Big Dipper signal receiving module, gps signal receiver module, to time signal fusing module, Big Dipper signal output module, gps signal output module and warning and lock modules are installed in housing 1, and innovation of the present utility model is: a mixed-media network modules mixed-media is also installed in housing, described to time signal fusing module port connect respectively Big Dipper signal receiving module, gps signal receiver module, mixed-media network modules mixed-media, Big Dipper signal output module, one end of gps signal output module and warning and lock modules, described Big Dipper signal receiving module, the other end of gps signal receiver module and mixed-media network modules mixed-media is connected respectively Big Dipper signal source, gps signal source and SNTP signal source, the other end of described Big Dipper signal output module and gps signal output module be all connected a plurality of to time signal receiver reference clock signal input, the other end of described warning and lock modules connects the alarm signal input of background monitoring system, and two block signal outputs of described warning and lock modules connect the block signal input of described Big Dipper signal output module and gps signal output module.

Wherein, described mixed-media network modules mixed-media adopts wireless transmission method or wire transmission mode.Described Big Dipper signal output module and gps signal output module by optical fiber interface, RJ45 interface or control cables be connected described to time signal receiver.

Above-mentioned a kind of clock synchronous to time automatic Verification special equipment using method as shown in Figure 2, comprise the following steps:

(1) the clock signal that timing acquisition Big Dipper signal source, gps signal source and SNTP signal source are sent;

(2) the clock signal in Big Dipper signal source and gps signal source is subtracted to computing, then difference is taken absolute value: the clock signal of Big Dipper signal source and SNTP signal source is subtracted to computing simultaneously, then difference is taken absolute value, finally judge the result of twice difference:

1 when two differences are less than preset value, using the clock signal of Big Dipper signal source as reference clock signal to each to time signal receiver output;

2 when any one difference is greater than preset value, enters secondary calculating process;

Constantly repeating step (1)～(2);

Described secondary calculating process comprises the following steps:

(1) the clock signal of gps signal source and SNTP signal source is subtracted to computing, then difference is taken absolute value:

(2) judge the result of this difference:

1 when difference is less than preset value, using the clock signal in gps signal source as reference clock signal to each to time signal receiver output;

2 when difference is greater than preset value, enters alarm procedure;

Described alarm procedure comprises the following steps:

(1) to Big Dipper signal output module and gps signal output module, send block signal, stop sending reference clock signal;

(2) to background monitoring system, send alarm signal.

The cycle of described timing acquisition is 50 milliseconds, and described preset value is 20 milliseconds.

Claims

Clock synchronous to time an automatic Verification special equipment, comprise Big Dipper signal receiving module, gps signal receiver module, to time signal fusing module, Big Dipper signal output module, gps signal output module and warning and lock modules, described Big Dipper signal receiving module, gps signal receiver module, to time signal fusing module, Big Dipper signal output module, gps signal output module and warning and lock modules are installed in housing, it is characterized in that: a mixed-media network modules mixed-media is also installed in housing, described to time signal fusing module port connect respectively Big Dipper signal receiving module, gps signal receiver module, mixed-media network modules mixed-media, Big Dipper signal output module, one end of gps signal output module and warning and lock modules, described Big Dipper signal receiving module, the other end of gps signal receiver module and mixed-media network modules mixed-media is connected respectively Big Dipper signal source, gps signal source and SNTP signal source, the other end of described Big Dipper signal output module and gps signal output module be all connected a plurality of to time signal receiver reference clock signal input, the other end of described warning and lock modules connects the alarm signal input of background monitoring system, and two block signal outputs of described warning and lock modules connect the block signal input of described Big Dipper signal output module and gps signal output module,

Described Big Dipper signal output module and gps signal output module by optical fiber interface, RJ45 interface or control cables be connected described to time signal receiver.
A kind of clock synchronous according to claim 1 to time automatic Verification special equipment, it is characterized in that: described mixed-media network modules mixed-media adopts wireless transmission method or wire transmission mode.