【摘要】 提出一种基于两次采样的交、直流电功率迭代算法,用于测量指定频率电力信号的交、直流电功率。算法针对由直流分量与交流分量相叠加的非正弦电力信号模型,首先计算出电压和电流信号中的直流和交流分量,再分别计算出各分量的功率值。通过MATLAB仿真,不仅验证了算法的快速性及准确性,并且由比较得出带宽参数大小对功率跟踪误差的影响,调节该参数大小可提高功率估算的快速性。更多还原

【Abstract】 In this paper,we propose an every other sample-based iteration algorithm for getting electric powers of direct current and alternative current,and the method is used to measure electric powers of DC and AC whose frequencies are specified. This algorithm takes aim at a mathematical model of non-sinusoidal signals which are made up of DC component and AC components,we at firstly calculate the DC component and AC components of voltage and current signals respectively,then computing the electric powers of each part. This measurement has been proved to be fast and accurate by MATLAB simulation. On the other hand,the effect on tracking accuracy caused by the size of bandwidth parameter has also been revealed,the quickness of power tracking can be improved by adjusting the size of this bandwidth.更多还原