1、 I 摘要 本设计为电力系统微机保护算法仿真（两点乘积算法和半周积分算法） ，设计内容包括： 设计随机正弦信号发生器；通过信号采样，得到电流，电压的瞬时值；通过瞬时值计算出电 流，电压信号的有效值；计算线路的阻抗，阻抗角及功率因数，得出信号有效值、计算值与 理论值之差。 本文首先对微机保护的发展、意义、研究重点、研究状况等进行了介绍；在微机保护中 通过对算法的研究寻找适当的运算方法来实现一定的保护功能，从而使运算结果的精度能满 足工程要求而计算耗时又尽可能短，达到既判断准确，且又动作迅速、可靠的效果。本文研 究了两点乘积算法和半周积分算法在电力系统微机保护中的应用。 关键词关键词： 电力系统
2、微机保护 两点乘积算法 半周积分算法 II Abstract This design is the simulation of microprocessor protection algorithm for power system (two product algorithm and a half weeks integrating algorithm), the design includes: design of random sine signal generator;, get the current, voltage instantaneous value by signal sa
3、mpling; and then calculated with the instantaneous value to get current and voltage signals effectively value; calculation circuit impedance, impedance angle and power factor， that signal RMS ,calculation value with the theoretical value of the poor. In this paper, the development of microprocessor-
4、based protection, the significance of research priorities, research conditions described. In computer protection lies in finding a proper method for the scattered operation to achieve the protection function,as well as to make sure the result is precise enough to meet the requirement of the project.At the same time,operation time should be as short as possible,and the result should be as exact,fast and reliable as possible. And introduct the product of two computer algorithms and a half wee
