| 引用本文: | 肖行诠,苟骁毅,肖 岚,李 乐,温丽丽,段 刚,杨 东,吴京涛,谢晓冬.基于UDP协议的局域网WAMS数据低延迟可靠传输方法[J].电力自动化设备,2011,31(10): |
| XIAO Xingquan,GOU Xiaoyi,XIAO Lan,LI Le,WEN Lili,DUAN Gang,YANG Dong,WU Jingtao,XIE Xiaodong.UDP-based small-delay and reliable transfer of WAMS data in LAN[J].Electric Power Automation Equipment,2011,31(10): |
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| 摘要: |
| 在局域网中基于快速的UDP协议对海量的WAMS数据进行实时高速可靠传输。提出了若干在应用层提高UDP传输可靠性的机制，包括发送时间间隔机制、数据缺失检查和重发机制、排序机制、实时插值机制、请求应答机制和伪连接机制。这些提高数据可靠性的机制只在发现数据有问题时，由应用层的程序实现，而非在网络传输层实现，避免了在网络传输层对所有原始数据施加可靠性检验措施，从而大幅提高了原始数据送达应用层的速度。在网络重负荷测试情况下，采用超过延时后缺失数据由接收端应用程序补偿的策略。上述通信系统能保证所有被请求的PMU数据在几毫秒内传送到第三方系统，验证了所提方法的有效性。 |
| 关键词: 局域网 广域测量系统 相量测量 数据通信 用户数据报协议 传输控制协议 |
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| UDP-based small-delay and reliable transfer of WAMS data in LAN |
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XIAO Xingquan1, GOU Xiaoyi1, XIAO Lan1, LI Le1, WEN Lili1, DUAN Gang2, YANG Dong2, WU Jingtao2, XIE Xiaodong2
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1.Sichuan Electric Power Company，Chengdu 610000，China;2.Beijing Sifang Automation Co.，Ltd.，Beijing 100085，China
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| Abstract: |
| UDP is applied in LAN for the quick and reliable transfer of mass WAMS data. It is proposed to apply following mechanisms at application level to increase the reliability of UDP-based data transfer: sending-time spacing，data-loss check and resending，data ordering，real-time interpolation，response request and virtual connection，which are carried out at application level only when data problems are found. As no verification and reliability measures are needed at network transmission level，the raw data can be sent to application level with the least time delay. Tests with heavy network loads show that，with interpolation mechanism for lost data，all requested PMU data are transferred to the system of third party in several milliseconds，which demonstrates the validity of the proposed method. |
| Key words: local area networks wide area measurement system phasor measurement data communication UDP transmission control protocol |
