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《Shandong Electric Power》 2017-01
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Secondary System Construction Scheme for Smart Substations Extension

KOU Yan;ZANG Hongzhi;PANG Yijun;ZHANG Fan;ZHU Xiaodong;Economic & Technology Research Institute, State Grid Shandong Electric Power Company;Shandong Electric Power Engineering Consulting Institute Co., Ltd.;State Grid Qingdao Power Supply Company;  
Different methods of information sampling in smart substations and their characteristics were presented.According to State Grid, the sampling method using control cable directly from general voltage and current transformers was recently announced to replace the method with merging unit in smart substation, so an in-depth discussion for the secondary system design of smart substation was needed.Taking the extension project of the 500 k V Jufeng smart substation(sampling from general voltage and current transformers with merging unit in its pre project) as an example, the two different construction projects were compared.The Result showed that the project with using control cable directly from general voltage and current transformers was safer and more convenient.
【CateGory Index】: TM63;TM76
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