电力系统运行参数交流同步采样算法研究

Research on the Arithmetic of AC Synchronous Sampling of Electric Power Parameters

电力系统中常需测量电压、电流、功率因数、有功功率、无功功率和视在功率等参数.文章介绍了电力参数微机测量装置中对电压、电流信号采样的方法,给出了交流信号同步采样中电压、电流有效值的算法实现,即积分和的算法和FFT算法,并进一步地给出了功率表达式.最后还阐明了同步的重要性及实现同步的策略———软件同步和硬件同步.

In an electric power system, the following parameters often need measuring： voltage, current, power factor, power, reactive power and apparent power. This paper introduced the methods to sample the vohages and currents in microcomputer measuring equipments. The arithmetic realization of AC synchronous sampling like the integral summation and FFT were presented. The equations of power were given. The paper also discussed the importance of synchronization, which would be realized by software synchronization and hardware synchronization.