摘要
电磁兼容一直以来都是微机保护装置开发研究的重点。文中分析了干扰的主要来源及其对微机保护装置的影响。共模干扰和差模干扰是各种电磁干扰在微机保护装置中的主要表现形式,可以通过减弱干扰源的辐射,阻塞干扰的耦合通道,增强敏感回路的抗干扰能力和合理设计泄放通道进行抑制。提出的措施包括对电源进行滤波,合理布局元器件和合理设计电路接地,对开关量输入输出、通信接口良好隔离等。这些措施应用于一套微机保护装置中并使其顺利通过Ⅳ级电磁兼容试验。
Research on the technology of electro-magnetic compatibility （EMC） is a focus on microprocessor-based protection development. This paper analyzes the main interference sources and their influences on the operation of protection equipments. The common-mode interference and differential-mode interference are the main forms of electro-magnetic interference in microprocessor-based protection, and they could be suppressed by reducing radiation of the interference sources, blocking the coupling channel of common-mode interference, promoting the anti-interference ability of the sensitive circuit, and designing the bleeder circuit rationally. The concrete measures include filtering the power source, distributing components and grounding the circuit rationally, isolating imports and exports of switch value, isolating internal communication ports from external and so on. By adopting these measures, the protection device has passed the IV level EMC test successfully.
出处
《继电器》
CSCD
北大核心
2008年第10期1-4,10,共5页
Relay
关键词
微机保护
电磁兼容
抗干扰
microprocessor-based protection
electro-magnetic compatibility （EMC）
anti-interference
