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.
出处
《电网技术》
EI
CSCD
北大核心
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
关键词
电磁兼容
接地
保护装置
测控装置
浮地
共地
electromagnetic compatibility （EMC）
grounding
protection devices
measuring and controllingdevice
floating grounding
direct grounding
