Intelligent distribution network time synchronization system and method based on ptn+epon communication system

Abstract

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. Including the precise clock source device, the master 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, and the master clock port of the PTN equipment at the central office is sequentially cascaded with the PTN equipment in multiple substations to form a ring structure , the master clock port of the PTN device in the substation is connected to the router, the router is connected to the slave clock port of the OLT device through the switch, the OLT device is connected to the ONU device through an optical fiber, and the master clock port of the ONU device is connected to the power distribution terminal. The present invention only uses GPS as a clock source, applies IEC61588 technology, and transmits precise time step by step through the communication system, so that the entire intelligent distribution network can realize time synchronization, and the time accuracy is theoretically better than 1 microsecond, and the dependence on GPS is small , which can meet the time synchronization requirements of the smart distribution network, has a simple structure and high practicability.

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...

AI Technical Summary

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

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