UTC (Coordinated Universal Time) time realization method applied to substation and system

An implementation method and system implementation technology, applied in time division multiplexing systems, electrical components, multiplexing communications, etc., can solve problems such as poor real-time performance and low accuracy of UTC time implementation, and achieve high precision and high real-time sexual effect

Active Publication Date: 2019-01-04
XUJI GRP +3
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Problems solved by technology

[0005] The purpose of the present invention is to provide a UTC time realization method and system applied to a substation, which is used to solve the problems of low UTC time realization accuracy and poor real-time performance of the clock synchronization device of the existing substation

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  • UTC (Coordinated Universal Time) time realization method applied to substation and system
  • UTC (Coordinated Universal Time) time realization method applied to substation and system
  • UTC (Coordinated Universal Time) time realization method applied to substation and system

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Embodiment Construction

[0027] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0028] FPGA has the advantages of small internal delay, fast running speed, parallel processing of logic, and high real-time and high stability; constant temperature crystal oscillator has high frequency stability, especially when the internal temperature rises to a certain range, its work The frequency is almost stable, and after the internal frequency of the FPGA is multiplied to 100 megabytes, it also ensures high precision at the nanosecond level. Therefore, under the excitation of the constant temperature crystal oscillator, the counter generated inside the FPGA must be stable, reliable and high-precision, which can fully meet the requirements for the clock synchronization device to output high-precision Coordinated Universal Time (UTC).

[0029] A UTC time realization system applied to substations, such as figure 1 As shown, it includes a t...

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Abstract

The invention provides a UTC (Coordinated Universal Time) time realization method applied to a substation and system. The time scale of a synchronous second pulse sent by a time service module and thecurrent time information and the time quality of a time message sent by the time service module are recorded; if the synchronous second pulse is valid and the time quality is in a synchronous state,the output time for a next synchronous second pulse is predicted; a second pulse is generated at the output time for the next synchronous second pulse, when the second pulse arrives, a second counteris triggered, and the second counter is updated to be the current time with one added; when the second pulse does not arrive, counting of a nanosecond counter is triggered; and the current values of the second counter and the nanosecond counter are acquired in real time to complete clock synchronization of the substation. Consistency with the reference time is achieved, and the requirements of high precision and high real-time performance of clock synchronization in the substation are met by utilizing the characteristics of high real-time performance and high stability of an FPGA and the advantages of frequency stability of a constant temperature crystal oscillator counter.

Description

technical field [0001] The invention belongs to the technical field of power system substations, and in particular relates to a UTC time realization method and system applied to substations. Background technique [0002] With the continuous expansion of the scale of the power system, large-capacity, ultra-high voltage, and long-distance power transmission are increasing, and the system architecture of the substation is becoming more and more complex. Therefore, the clock synchronization of the power system is becoming more and more important, and the importance of clock synchronization devices is highlighted. At present, clock synchronization devices have been used in power dispatching systems, relay protection devices, EMS energy management systems, fault recorders, distributed motion terminals, substation integrated automation systems, telemetry, remote signaling data processing, and high-voltage transmission lines fault location. [0003] The time synchronization device ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0638H04J3/0644
Inventor 郑拓夫赵应兵朱小锴杨智德李超李刚闫志辉王晓锋金全仁
Owner XUJI GRP
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