小电阻接地方式对变压器差动保护的影响  

Influence of low resistance grounding mode on transformer differential protection

作　　者：闫石 YAN Shi(Shenzhen Airport(Group)Co.,Ltd.,Shenzhen 518128,China)

机构地区：[1]深圳市机场(集团)有限公司,广东深圳518128

出　　处：《黑龙江电力》2021年第4期336-341,共6页Heilongjiang Electric Power

摘　　要：根据小电阻接地方式及变压器差动保护转角方式的特点,应用对称分量法分析小电阻接地方式下单相接地故障对变压器差动保护可靠性、灵敏性的影响,并采用电磁暂态仿真软件(PSCAD/EMTDC)按某10 kV、35 kV供电系统参数进行仿真,通过仿真分析对小电阻接地方式及变压器差动保护的设计及整定提出建议和改进措施。According to the characteristics of low resistance grounding mode and transformer differential protection angle mode,the symmetrical component method is applied to analyze the influence of single-phase grounding fault on the reliability and sensitivity of transformer differential protection under low resistance grounding mode,and the electromagnetic transient simulation software(PSCAD/EMTDC)is used to simulate according to the parameters of a 10 kV and 35 kV power supply system.Through the simulation analysis,suggestions and improvement measures are put forward for the design and setting of small resistance grounding mode and transformer differential protection.

关 键 词：小电阻接地方式 对称分量法 单相接地故障 变压器差动保护 

分 类 号：TM77[电气工程—电力系统及自动化]