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12 October 2018 Low-latency optical process-level network based on all-optical edge nodes for sample value service in substations
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Abstract
We describe a low-latency optical process-level network (OPLN) scheme based on all-optical edge nodes for sample value (SV) service in substations. The edge nodes we present and demonstrate consist of optical splitters and a wavelength division multiplexer, enabling the proposed scheme to realize optical intrabay physical-layer multicasting and interbay signal gathering. A scalability model for the OPLN and a latency model of the intrabay transmission subsystem are established. Simulation results show that 1  ×  32 optical splitters can be used in the all-optical edge nodes with error-free transmission and that the end-to-end latency for the intrabay transmission of SV flows can be reduced by 46.6% compared with an Ethernet switch under the 100BASE protocol. A prototype of the all-optical edge node is developed and tested, achieving ultralow latency (less than 500 ns) and good compatibility with terminals using an Ethernet interface in a substation. A field-experiment system for SV service, covering eight bays with four all-optical edge nodes, is constructed in a 220-kV substation in Sichuan Province, China. This system achieves low-latency transmission of SV flows without frame loss for more than 10 h of continuous operation.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2018/$25.00 © 2018 SPIE
Yu Zheng, Lingyun Di, Shijie Ma, Xiaojian Zhang, Peng Wu, Jie Zhang, and Xiaohan Sun "Low-latency optical process-level network based on all-optical edge nodes for sample value service in substations," Optical Engineering 57(10), 106103 (12 October 2018). https://doi.org/10.1117/1.OE.57.10.106103
Received: 8 June 2018; Accepted: 18 September 2018; Published: 12 October 2018
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