引用本文:许俊现,高会生,汪洋.用于线路纵差保护的PTN时分复用业务时延分析[J].电力系统保护与控制,2015,43(23):56-62.
XU Junxian,GAO Huisheng,WANG Yang.A delay time analysis of time division multiplexing services over PTN applied to line longitudinal differential protection[J].Power System Protection and Control,2015,43(23):56-62
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用于线路纵差保护的PTN时分复用业务时延分析
许俊现1, 高会生2, 汪洋3
1.河北省电力公司，河北 石家庄 050021;2.华北电力大学，河北 保定 071003;3.中国电力科学研究院，北京 100192
摘要:
PTN承载的时分复用业务具有显著随机性，利用此类业务传输线路纵差保护数据需要全面分析业务时延和通道不对称性。在全面分析业务时延形成机理的基础上，建立了时延模型，该模型包含固定时延和随机时延两种分量。给出了数据分组随机时延的数值仿真方法，该方法可用来研究以太网帧长、带宽占用率和路径跳数等不同条件下的时延分布特征。定量分析了PTN承载时分复用业务对线路纵差保护通信需求的适应性。研究成果具有工程参考价值。
关键词:  分组传输网  纵联差动保护  时分复用  时延  抖动
DOI：10.7667/j.issn.1674-3415.2015.23.009
分类号:
基金项目:
A delay time analysis of time division multiplexing services over PTN applied to line longitudinal differential protection
XU Junxian1, GAO Huisheng2, WANG Yang3
1.Hebei Electric Power Corporation, Shijiazhuang 050021, China;2.North China Electric Power University, Baoding 071003, China;3.China Electric Power Research Institute, Beijing 100192, China
Abstract:
The time division multiplexing service carried by packet transmission network (PTN), has significant stochastic characteristic. When this kind of service is used for data transmission of line longitudinal differential protection, it is necessary to make the comprehensive analysis on service delay and channel asymmetry. By analyzing the mechanism of delay time, a delay model including deterministic component and stochastic component is established. Considering Ethernet frame size, bandwidth usage and path hops, the numerical simulation method for stochastic delay of data packets is given. This method can be used to study on time delay distribution characteristics under different conditions. Combined with the communication requirements of line longitudinal differential protection, the adaptability of time division multiplexing service carried by PTN is analyzed quantitatively. The research results have reference value for engineering.
Key words:  packet transmission network  longitudinal differential protection  time division multiplexing  delay  jitter
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