基于DSP和FFT的三相无功功率测量

摘要

介绍了一种基于DSP的电网三相无功功率测量系统，系统采用软件锁相对一个周期内的信号进行等间隔的采样，利用快速傅里叶算法计算无功功率等电量参数，为实时补偿无功功率提供依据。给出了系统相应的硬件设计电路和软件设计，经实际测量验证了系统的可行性和准确性。%A three-phase reactive power measurement system based on DSP was introduced in this paper. The signals in one cycle were sampled at equal intervals by using the software phase-lock, and the FFT algorithm was adopted to calculate power parameters such as reactive power, which could provide the basis for the real-time reactive power compensation. The hardware circuit design and software design were given in this paper, and the feasibility and accuracy of the system were verified by actual measurements.