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数字化变电站过程层组网方案
梁国坚1, 段新辉2, 高新华3
1.广东电网公司 中山供电局,广东 中山 528400;2.广东电网公司 生产技术部,广东 广州 510000;3.广东电网公司 电力科学研究院,广东 广州 510600
摘要:
在介绍数字化变电站系统基本结构和组网方案的基础上,通过对报文传输的测试,提出数字化变电站过程层组网方案。星形结构在运行维护、传输时间等多方面优于总线型、环形结构,宜采用双星形结构构建过程层网络。在不同的交换机数据传输流量下对采样值和保护跳闸命令2类最重要的报文传输进了测试,结果表明:交换机数据流量大时,会造成采样值变化和GOOSE传输延时。提出3种过程层组网方案:过程层 GOOSE网络和采样数据传送网络分开,采样数据传输采用IEC60044-8或IEC61850-9-1标准的点对点光纤传输;过程层GOOSE网络和采样数据传送网络分开,采样数据传输采用IEC61850-9-2标准的100 Mbit / s光纤以太网;过程层GOOSE网络和采样数据传送网络统一。可根据变电站结构和规模、重要性以及所选网络设备考虑过程层组网。
关键词:  数字化变电站  过程层  网络  报文传输  测试
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Networking schemes for process level of digital substation
LIANG Guojian1, DUAN Xinhui2, GAO Xinhua3
1.Zhongshan Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Zhongshan 528400,China;2.Production Technology Department,Guangdong Power Grid Co.,Ltd.,Guangzhou 510000,China;3.Power Science Research Institute,Guangdong Power Grid Co.,Ltd.,Guangzhou 510600,China
Abstract:
The basic structure and networking schemes of digital substation are introduced,and some networking schemes are proposed for the process level of digital substation based on the message transmission tests. As star structure is superior over bus and ring structures in operational maintenance,transmission time and so on,dual-star structure is proposed for process level networking. The transmission of sampling value message and protection trip message is tested under different conditions of switch data flow. Results show that large flow will cause sampling value change and GOOSE transmission delay. Three networking schemes are proposed for process level:the sampling data transmission network adopts IEC60044-8 or IEC61850-9-1 via point-to-point fiber,separated from the GOOSE network;the sampling data transmission network adopts IEC61850-9-2 via 100 M Ethernet,separated from the GOOSE network;one network for both sampling data and GOOSE transmission. The scheme is selected according to the structure,scale and importance of substation and the applied network devices.
Key words:  digital substation  process level  network  message transmission  test

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