变电站微机装置接地的电磁兼容性能设计  

Electromagnetic Compatibility Design of Grounding for Microcomputer-Based Devices in Substations

作　　者：景展[1] 余华武[2] 

机构地区：[1]南京工程学院电力工程学院,江苏省南京市210013 [2]国电南京自动化股份有限公司,江苏省南京市210003

出　　处：《电网技术》2010年第6期48-52,共5页Power System Technology

基　　金：南京工程学院院级科研基金项目(KXJ07013)的资助

摘　　要：总结目前电力系统主流保护测控装置的电磁兼容性(electromagnetic compatibility,EMC)等级水平和共地系统两类装置的试验和实际应用,两者都可实现EMC等级的要求。对开关量输入端口不同抗干扰措施进行举例分析,并提出共地系统的一些等电位连接方法。对比分析并提出共地系统装置的印刷电路板(printed circuit board,PCB)屏蔽应就近接逻辑地,可以提高抗干扰效果。The electromagnetic compatibility （EMC） grades adopted in mainstream protective, measuring and controlling devices for power system are summarized. The testings and practical applications of the two kinds of grounding systems, i.e., the direct grounding system and floating-grounding system, show that both grounding systems can meet the demand of EMC grades. Based on the analysis on different anti- interference measures used in digital signal input terminals, some equipotential bonding methods for common-grounding system are proposed. According to results of comparative analysis, it is proposed that the shielding of printed circuit board（PCB） in direct grounding system should be connected to digital ground nearby to improve anti-interference effect.

关 键 词：电磁兼容 接地 保护装置 测控装置 浮地 共地 

分 类 号：TM774[电气工程—电力系统及自动化]