一种基于单片机的自供电过电流继电器的设计  

A design of self-powered overcurrent relay based on MCU

作　　者：徐志坚[1] 刘映杰[1] 王新[1] 李涟凤[1] 

机构地区：[1]兰州大学信息科学与工程学院,甘肃兰州730000

出　　处：《电力系统保护与控制》2010年第11期117-120,共4页Power System Protection and Control

摘　　要：为了解决直接从电流互感器二次侧获得电路工作能量的问题,结合现代开关电源技术,利用微控制器较强数学运算和逻辑处理能力,设计了一种自供电过电流继电器。根据继电保护算法给出了时间过电流和接地保护功能的硬件设计和软件设计。自供电是本设计的最大特点。试验表明本继电器具有性能优良、可靠性高、免维护、参数整定简单和体积小等优点,适宜应用在35kV及以下电压等级不需重合闸的线路保护中。To solve the problem of getting the operating energy directly from CT,c ombined with modern switching power technology and the powerful mathematical and logical processing ability of the microcontroller,this paper gives the design of the self-powered overcurrent relay.Both the hardware design and software design of time over-current and earthing protection are realized according to the algorithm of relay protection.Self-power supply is the most prominent feature of the design.Experiments results indicate the relay proposed has a good performance,high reliability,maintenance-free,simple parameter setting and small size,and it is suitable for applications in the lines protection at voltage level 35 kV and below without reclosing.

关 键 词：自供电 傅氏算法 零序电流 启动元件 微控制器 

分 类 号：TM588[电气工程—电器]