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Intelligent power distribution network time synchronization system and method based on PTN+EPON communication system

A technology of time synchronization system and intelligent distribution network, applied in information technology support system, selection device of multiplexing system, synchronization device, etc. Small sex, improve synchronization accuracy, reduce the effect of dependence

Active Publication Date: 2013-12-11
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing smart distribution network time synchronization system is highly dependent on GPS, which is very unfavorable for security, and the smart distribution network has the characteristics of many and scattered outlets, a wide distribution range, and a complex environment. If each distribution terminal is installed Installing a GPS device presents great challenges in terms of economy and feasibility

Method used

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  • Intelligent power distribution network time synchronization system and method based on PTN+EPON communication system
  • Intelligent power distribution network time synchronization system and method based on PTN+EPON communication system

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Embodiment Construction

[0031] Embodiments of the present invention are further described below in conjunction with accompanying drawings:

[0032] Such as figure 1 , figure 2 As shown, the intelligent distribution network time synchronization system based on the PTN+EPON communication system of the present invention includes a precise clock source device, the precise clock source device is a GPS device or a Beidou device or a GPS / Beidou device, and the precise clock source device is Set up a high-stable constant temperature crystal oscillator and GPS and Beidou receiving antennas. The main clock port of the precise clock source device is connected to the slave clock port of the PTN equipment at the central office through the IEC61588 protocol. The main clock port of the PTN equipment at the central office is sequentially connected with the The PTN equipment is cascaded to form a ring structure, the main clock port of the PTN equipment in the substation is connected to the router, the router is con...

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Abstract

The invention relates to a power distribution network time synchronization system and method, and particularly relates to an intelligent power distribution network time synchronization system and method based on a PTN+EPON communication system. The intelligent power distribution network time synchronization system comprises an accurate clock source device. A primary clock port of the accurate clock source device is connected with a secondary clock port of a local end PTN device via an IEC61588 protocol. The primary clock port of the local end PTN device is cascaded with PTN devices in multiple transformer stations so that an annular structure is formed. The primary clock port of each PTN device in each transformer station is connected with a router which is connected with the secondary clock port of an OLT device via a switch. The OLT device is connected with an ONU device via an optical fiber. The primary clock port of the ONU device is connected with a power distribution terminal. According to the intelligent power distribution network time synchronization system, only a GPS is used as a clock source. An IEC61588 technology is applied, accurate time is transmitted step by step via a communication system so that time synchronization of the whole intelligent power distribution network is realized. Time accuracy is superior to 1 microsecond theoretically so that dependency on the GPS is low, and a requirement of the intelligent power distribution network towards time synchronization can be met. Therefore, the intelligent power distribution network time synchronization system is simple in structure and high in practicality.

Description

technical field [0001] The invention relates to a distribution network time synchronization system and method, in particular to a smart distribution network time synchronization system and method based on a PTN+EPON communication system. Background technique [0002] With the rapid development of smart distribution network, key supporting technologies of smart distribution network such as synchronous measurement and longitudinal protection based on communication network have put forward high requirements for time synchronization system. Therefore, time synchronization technology is very important in smart distribution network status is also increasing. [0003] The most widely used existing power system synchronization technology is the Global Positioning System (Global Positioning System, GPS). The statistical error of GPS output is 1μs, which can meet the clock synchronization requirements of power system automation, and is widely used in substation automation and dispatc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L7/00H02J13/00
CPCY04S40/124Y04S40/126Y02E60/00
Inventor 咸日常蒋涛翟滢孙铭翟纯恒王爱华郭东升张宁张兴永刘刚张洪民侯梅毅朱国防郭净天
Owner STATE GRID CORP OF CHINA
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