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中文摘要：
分布式保护系统采用变电站以太网传输报文时会带来时延不确定性问题。介绍了传输时延构成与其特性,利用网络仿真软件OPNET对典型的分布式保护系统进行通信时延仿真,验证了分析结果。给出了降低时延不确定性的详细策略,为分布式保护系统相应产品的开发奠定了基础。
英文摘要：
Delay uncertainty problem may happen in the transferring process of the distributed relay system which takes substation Ethemet to be communication networks. Introduction was made to the transmission time delay constitute and its characteristics. Simulation software OPNET was adopted to carry out communication time delay simulation for the typical distributed relay system, the results of the analysis verified. Detailed strategy of reducing time delay uncertainty was given to lay the foundations for the corresponding product in the distributed relay system.
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