作者:丁津津，徐晨，孙辉，汪勋婷，韩民畴

Authors:DING Jin-jin,XU Chen,SUN Hui,WANG Xun-ting,HAN Min-chou
摘要:摘要:针对光纤差动保护联调试验，双端测试仪无法实现同步控制，不能进行两侧区外故障测试及比率制动特性自动测试等问题。采用PTP同步技术，建立线路纵差分布式测试系统以及同步控制通讯模型，研究双端同步控制的分布式测试方法。相比于GPS对时存在接线麻烦、对时信号弱、无法形成统一测试报告等缺点。基于PTP同步的线路纵差分布式测试系统实现了双端同步测试、实验单端控制、结果综合评估的功能，可进行两侧区外故障及制动特性曲线测试，提升了现场调试全面性。

Abstract:Abstract:Aiming at the problems of the joint debugging test of optical fiber differential protection, the two terminal testers can not achieve synchronous control, and carry out the fault test of both sides and automatic test of ratio braking characteristics. By using PTP synchronization technology, the distributed test system of line longitudinal difference and the communication model of synchronous control are established, and the distributed test method of double-terminal synchronous control is studied. Compared with GPS, there are some disadvantages, such as wiring trouble, weak timing signal, unable to form a unified test report and so on. The distributed test system of line longitudinal difference based on PTP synchronization realizes the functions of two terminal synchronous tests, single terminal control and comprehensive evaluation of test results. It can test the fault and braking characteristic curve outside the two sides, and improves the comprehensiveness of on-site debugging.

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