火力发电机电晕现象的机理分析及处理措施  

Mechanism analysis and treatment measures of thermal generator corona phenomenon

作　　者：孙振鹏 SUN Zhenpeng(Datang International Beijing Gaojing Power Co.,Ltd.,Beijing 100043,China)

机构地区：[1]大唐国际发电股份有限公司北京高井热电分公司,北京100043

出　　处：《电气应用》2024年第11期104-107,共4页Electrotechnical Application

摘　　要：电晕现象是大型火力发电机中的常见放电现象,为了解决电晕导致的电能损耗、设备老化及电磁干扰等问题,从电场强度与电压的关系、介电常数的影响、电晕起始场强以及Paschen定律出发,系统分析了发电机产生电晕现象的机理。通过研究导线表面粗糙度、棱角半径、气体压力和密度等因素,提出了控制电场强度、优化导线表面和几何设计、调节工作气压和使用高密度绝缘气体等措施,这些措施能够有效抑制电晕现象,提高火力发电机的运行可靠性。Corona phenomenon is a common discharge phenomenon in thermal generator,in order to solve the problems of electric energy loss,equipment aging and electromagnetic interference caused by corona,this paper systematically analyzes the mechanism of corona phenomenon from the relationship between electric field strength and voltage,the influence of dielectric constant,corona initial field strength and Paschen’s law.By studying the surface roughness,corner radius,gas pressure and density of wires,the measures such as controlling the electric field strength,optimizing the surface and geometric design of the wire,adjusting the working air pressure and using high-density insulating gas are proposed,which can effectively suppress the corona phenomenon and improve the operation reliability of electrical equipment.

关 键 词：大型火力发电机 电场强度 电晕现象 电晕起始场强 Paschen定律 

分 类 号：TM621[电气工程—电力系统及自动化]