The original signals are detected by ac sampling algorithm in the protection system , at the same time , power system parameters , such as voltage value , current value are obtained through fourier transform , which accelerates the reaction speed of mcs and improve the reliability of mcs 综合保护系统直接对传感器二次交流信号高速采样,利用傅立叶算法获取所需电压、电流等参数,然后对需控量进行监视、分析、统计和判断,从而使可信度、可靠性得到保障。
The quantizing error , linear error and differential linear error of an a / d converter were deduced , after that the error model of synchronous sampling , asynchronous sampling and quasi - synchronous sampling algorithms used in power measurement were build in condition that a / d was not perfect 推导了a / d量化误差、非线性及微分非线性误差的数学模型。然后,建立了采样功率测量同步采样算法、非同步采样算法和准同步采样算法在非理想情况下的计算机仿真模型。
The software system consist of some software modules which realizing independent functions , such as initialization module , pi algorithm module , sampling algorithm module and interrupt module . under connection of the main program , these modules realize an integrated system 软件系统由初始化模块、 pi算法模块、软启动算法模块、采样算法模块、中断子程序模块等几个可以实现独立功能的模块组成,这些功能模块在主程序的控制连接下,实现了一个完整的系统。
The controlling part of the comprehensive measuring instrument is 16 bits single - chip microprocessor 80c196kc . it is based on sampling theory and uses synchronous sampling algorithm to measure ac parameters of power system . it has many advantages as followed : complete functions , perfectperformance , portability , high - reliability , low cost and so on 该仪器以16位单片机80c196kc作为核心控制器件,采用同步采样法测量理论及实时数据处理方法,具有功能齐全、可靠性高、性能价格比高、便于携带等优点。
After the comparison with many algorithm , the paper chose alternating sample algorithm , and we also proposed a kind of fourier algorithm on the basis of dispersed fourier algorithm and its fast fourier algorithm , it improved systematic operation efficiency greatly , and made it can be used online among the practical devices . the system adopted module design , which was the foundation of upgrading and expanding system 本文还通过与多种算法的比较,经综合考虑最终选取了适应系统需要的交流采样方式,均方根算法,并提出了一种基于离散傅立叶变换及其快速傅立叶算法的用于谐波分析的全周波傅立叶算法,其大大提高了系统的运算效率,使之能够在实际装置中在线使用。