Title :
Harmonic estimation in power systems basing on numerical differentiation
Author :
Wu, J.K. ; Long, J. ; Wang, J.X.
Author_Institution :
Dept. of Electr. Eng., Guangxi Univ., Nanning, China
Abstract :
An algorithm for harmonic estimation based on numerical differentiation and central Lagrange interpolation of multipoint is presented in this paper. The proposed algorithm is adaptive for the cases, in which the fundamental frequency vary from 30 Hz to 100 Hz, the fundamental amplitude vary from 120 V to 300 V, and the fundamental phase angle vary from 0 to 360. The maximal errors for the amplitude and phase angle of each harmonics are all 0.001%. Simulation analysis is carried out in Matlab software with a testing example with the results satisfactory.
Keywords :
harmonic analysis; interpolation; power system harmonics; power system simulation; 120 to 300 V; 30 to 100 Hz; Lagrange interpolation; Matlab software; fundamental amplitude; fundamental frequency; fundamental phase angle; nonsinusoidal signal; numerical differentiation; power system harmonic estimation; Amplitude estimation; Frequency estimation; Harmonic analysis; Instruments; Interpolation; Lagrangian functions; Phase estimation; Power system analysis computing; Power system harmonics; Voltage;
Conference_Titel :
Power Electronics and Drive Systems, 2003. PEDS 2003. The Fifth International Conference on
Print_ISBN :
0-7803-7885-7
DOI :
10.1109/PEDS.2003.1283224
