继电保护整定计算是继电保护工作中的一项重要工作,对供电系统的安全稳定运行起着极为重要的作用.目前城市轨道交通供电系统继电保护的整定计算尚没有相关的标准,结合上海地铁9号线的工程设计,对城市轨道交通中压环网变电所的继电保护整定计算进行探讨,依据变电所的保护装置设置和功能需求,对继电保护的原则、整定方法及步骤、短路点选择、计算公式等进行了全面阐述,并且给出了类似工程继电保护整定的建议.%Setting calculation is an important part of relay protection system, and plays an extremely important role in security and stability of traction power supply system. Currently, there is no relevant standard on relay setting calculations for traction power supply system in urban rail transit industry. Combining with the design for line 9 of Shanghai Metro, this paper discusses the relay setting calculations for medium-voltage traction power substations in urban rail transit systems. Based on protective equipment settings and functional requirements of traction power substation, this paper also describes the principles, methods, procedures, short-circuit point selection and the relevant calculation formula of relay protection, as well as gives suggestions on relay settings for similar projects.
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