FPGA based design and implementation of non-sinusoidal reactive power

A system module of reactive power measurement is proposed on the basis of analyzing the mathematic model in this paper. A FFT intelligence property (IP) core is designed to estimate the amplitude and phase of harmonic. Two multipliers and a subtraction also are designed to calculate reactive power. Transposing circuit is applied to fix the data in order to reduce error of the system. An adder module is used to sum the reactive power value to get the total reactive power. Then, all the IP cores are designed by VHDL [1] [2]; and simulated by Quartus II. At last, all the IP cores mentioned above are applied in the ASIC design of one electric power measurement chip [3]. Calculation in the theory and results of simulation show that this design is able to obtain more precision.