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High-precision time-keeping system for transformer station side

A substation-side, high-precision technology, applied in time-division multiplexing systems, electrical components, multiplexing communications, etc., can solve problems such as difficult to achieve punctual accuracy and restricted punctual accuracy

Inactive Publication Date: 2017-05-17
深圳市合讯电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since both the rubidium clock and the constant temperature crystal oscillator are aging, the accuracy of timekeeping is subject to the speed of aging, and it is generally difficult to achieve a timekeeping accuracy of 1us / 24 hours

Method used

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  • High-precision time-keeping system for transformer station side

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Embodiment Construction

[0008] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0009] see figure 1 ,

[0010] A high-precision timekeeping system on the substation side. By using the original Ethernet link in the communication room, when the time synchronization master device in the communication room loses the time reference, the high-precision frequency signal obtained through synchronous Ethernet is used as the time synchronization equipment in the communication room. At the same time, the Ethernet network from the existing communication machine room to the relay protection machine room can also be used. When the time synchronization device in the relay protection...

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Abstract

The invention discloses a high-precision time-keeping system for a transformer station side, and the system employs an original Ethernet link of a communication machine room. When a time synchronization main device of the communication machine room loses the time reference, a high-precision frequency signal obtained through a synchronous Ethernet serves as a time-keeping reference of time synchronization equipment of the machine room. Meanwhile, the system also can employ an existing Ethernet network from the communication machine room to a relay protection machine room, and does not need to employ a local oscillator for time keeping. The high-precision frequency reference obtained through the synchronous Ethernet serves as a time-keeping signal, thereby continuing to maintain the high-precision time synchronization output. The interior of the communication machine room is provided with a high-precision time synchronization device, and the high-precision time synchronization device is provided with a GPS and a Beidou satellite, which serve as a time service reference and a frequency reference. Meanwhile, the time service reference and the frequency reference are transmitted to the far-end relay protection machine room through a communication optical cable, and a time synchronization extension device of the relay protection machine room is monitored.

Description

technical field [0001] The invention relates to the field of substation time synchronization, in particular to a high-precision timekeeping system at the substation side. Background technique [0002] With the advancement of science and technology, various relay protection devices and primary equipment on the substation side need high-precision time synchronization. The current power industry standard has a time synchronization accuracy requirement of 1us. At present, the time synchronization network and high-precision time synchronization on the substation side are basically realized through the time synchronization device. The time synchronization device is equipped with GPS and Beidou satellite receivers to obtain the time reference and frequency reference. There are time phase-locked loops and frequency locks inside. Phase loop to filter the fluctuation of time and frequency, and lock the reference time and frequency, and distribute the time and frequency to other requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0617H04J3/0635
Inventor 罗雷波
Owner 深圳市合讯电子有限公司