二次回路中电快速瞬变脉冲群骚扰的研究  

Study on EFT/B in Secondary Circuit and Initiative Countermeasures

作　　者：王玉峰[1] 邹积岩[1] 廖敏夫[1] 

机构地区：[1]大连理工大学电气工程与应用电子技术系,辽宁省大连市116024

出　　处：《电力系统自动化》2007年第16期79-82,共4页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50507001)~~

摘　　要：为有效抑制电快速瞬变脉冲群(EFT/B)骚扰对微机保护装置的干扰,研究了EFT/B骚扰的形成和耦合机理。分析了开关分断操作形成EFT/B骚扰的过程;通过对二次回路中控制继电器操作时形成EFT/B骚扰的研究,分析得出出口继电器线圈上耦合的骚扰电压严重干扰微机保护装置的直流电源电压;采取续流二极管、电磁屏蔽和RC保护等主动防护措施抑制EFT/B骚扰的形成和耦合。结果表明,可从干扰源和耦合途径上有效抑制EFT/B骚扰对微机保护装置的干扰。The formation and coupling principle of electrical fast transient/burst （EFT/B） is studied to effectively protect microprocessor protection devices from the EFT/B disturbance. The forming process of EFT/B caused by switch operation is dealt with. By analyzing the EFT/B disturbance formed by operating control relay in the secondary circuit, it is observed that the coupled disturbance voltage of the output relay coil can badly interfere with the DC power source voltage of the microprocessor protection devices. Such initiative countermeasures as fly-wheel diode, electromagnetic shielding and RC protection are used to restrain the formation and coupling of EFT/B disturbance. The results indicate that the EFT/B disturbance from the interference source and coupling path can be effectively restrained.

关 键 词：电快速瞬变脉冲群 微机保护装置 干扰源 耦合途径 

分 类 号：TM774[电气工程—电力系统及自动化] TM863