10kV输电线路的微机继电保护

伴随着电力系统的快速发展和人们对供电的高要求，为了保证输电线路的安全稳定运行，要求对输电线路实施高性能的微机保护。该文基于C8051F021单片机开发出了一套微机继电保护装置，其功能是对实时电流信号的采集并进行相应的保护运算，对电力系统运行进行实时监测，发生故障或不正常运行时能进行相应的分析后可靠性动作或发出信号。主要内容是进行了微机保护硬件电路的搭建，根据线路保护的要求，利用c语言开发工具实施了软件编写以及保护算法编写工作。其中，在对保护算法的编写工作中，以保证对故障或不正常运行时能快速动作或发出信号为目的，选择了用两点乘积算法和差分滤波器来实现。经过反复测试，其性能符合继电保护的要求。

Microcomputer Relay Protection for 10kV Transmission Line

With the rapid development of power system and the high requirements on the power supply,to ensure the security and stability of power transmission line microcomputer protection requirements,the implementation of high performance on the transmission line.In this paper,C8051F021 MCU developed a set of microcomputer relay protection device based on the function of the real time current,signal acquisi- tion and protect the corresponding operation,real-time monitoring of power system operation,the fault oc- curs or not during normal operation can make corresponding analysis on action or signal.The main con- tent is the microcomputer protection hardware,according to the line protection requirements,the imple- mentation of the software programming and the protection algorithm using C language development tools. The protection algorithm in compiling,fast action to ensure that the failure or abnormal operation or can signal for the purpose,the two-point multiplication algorithm and differential filter to achieve.After repeated testing,its performance meets the requirements of relay protection.