CAJ | 학술논문

针对直流分量与多个谐波及间谐波分量叠加的时变电力信号,采用一阶低通滤波器与多个归一化频率估计器并联形成偏置频率自适应梳状滤波器,以快速准确估计直流分量以及每个谐波与间谐波分量的频率和幅值. 算法的带宽参数与频率自适应增益分别对幅值与频率的收敛速度及估计精度具有不同的影响. 利用经典四阶龙格-库塔方法获得相应的离散算法,并给出实现算法的程序结构. 采用两个DSP系统组成实验系统,验证了算法的有效性.
침대직류분량여다개해파급간해파분량첩가적시변전력신호,채용일계저통려파기여다개귀일화빈솔고계기병련형성편치빈솔자괄응소상려파기,이쾌속준학고계직류분량이급매개해파여간해파분량적빈솔화폭치. 산법적대관삼수여빈솔자괄응증익분별대폭치여빈솔적수렴속도급고계정도구유불동적영향. 이용경전사계룡격-고탑방법획득상응적리산산법,병급출실현산법적정서결구. 채용량개DSP계통조성실험계통,험증료산법적유효성.
In view of the time variant electric signals superposed by direct current component and multi harmonic and inter-harmonic components, this paper proposes a biased frequency adaptive comb filter which is composed of a first-order low pass filter and multi normalized frequency estimators in parallel.The algorithm is used to estimate fast and precisely the bias component and the frequency and the amplitude of each harmonic/inter-harmonic component in the sum of direct current component and multi harmonic components.The bandwidth parameter and the frequency adap-tive gain play different effects on the convergence speed and the precision of frequency estimation and amplitude esti-mation respectively.A discrete algorithm is obtained by using of classic fourth-order Runge-Kutta method, and the program flow for realization of algorithm is presented in this paper.The experiment results from an experimental system composed of two DSPs verify the validity of the proposed method.