| 引用本文: | 高会生,汪 洋.PTN业务随机时延对差动保护同步性能的影响分析[J].电力自动化设备,2015,35(7): |
| GAO Huisheng,WANG Yang.Effect of PTN service random delay on synchronization performance of current differential protection[J].Electric Power Automation Equipment,2015,35(7): |
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| 摘要: |
| 分组传送网的时分复用业务存在随机时延，这种随机时延会影响差动保护的同步性能。为了定量分析随机时延对同步性能的影响程度，给出了一种端到端的业务随机时延模型，并分析了收发双向不对称时延的分布特征。根据线路纵差保护的时间同步原理，利用时延违背概率描述随机时延对同步性能的影响程度。仿真研究了业务路径节点数量、网络吞吐量和网络带宽等参数对时延违背概率的影响，结果表明，优化这些参数可以降低时延违背概率，提高同步性能；当网络带宽达到10 Gbit ／s，或继电保护最大允许不对称时延为100 μs时，随机时延对继电保护同步的影响可以忽略。 |
| 关键词: 分组传送网 业务时延 时延不对称性 差动保护 同步 通信 |
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| Effect of PTN service random delay on synchronization performance of current differential protection |
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GAO Huisheng1, WANG Yang2
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1.North China Electric Power University，Baoding 071003，China;2.China Electric Power Research Institute，Beijing 100192，China
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| Abstract: |
| The random time delay of the time division multiplexing of packet transport network influences the synchronization performance of differential protection. A random delay model for the end to end service is given to quantitatively analyze it and the characteristics of two-way asymmetric delay distribution are analyzed. According to the time synchronization principle of line longitudinal differential protection，the DVP（Delay Violation Probability） is adopted to describe the influence of random delay on the synchronization performance. The influence of network parameters，such as service path node number，the network throughput and network bandwidth，on the DVP is researched by simulation and the simulative results show that，the DVP can be reduced by optimizing these parameters to improve the synchronization performance； when the network bandwidth reaches 10 Gbit／s or the maximum allowable asymmetric delay is 100 μs，its influence can be ignored. |
| Key words: packet transport network service delay delay asymmetry current differential protection synchronization communication |
