Title :
A new control method for eliminating the 2nd harmonic at the DC link of a shunt APF under an unbalanced and nonlinear load
Author :
Pengpai Dang ; Petzoldt, J.
Author_Institution :
Dept. of Power Electron. & Control, Tech. Univ. Ilmenau, Ilmenau, Germany
fDate :
Aug. 30 2011-Sept. 1 2011
Abstract :
Under an unbalanced load 2nd harmonic DC link and 3rd harmonic at AC input current of a shunt APF appear due to the fundamental negative frequency load current. These low order harmonics can cause a series of high order harmonics at both of AC and DC sides. In this paper a new control method is presented to eliminate the 2nd ripple of DC link voltage to alleviate the stress of the DC-link capacitor and thus to reduce the 3rd harmonic of line currents.
Keywords :
active filters; power harmonic filters; power system control; voltage control; DC link voltage; DC-link capacitor; high order harmonics; line currents; negative frequency load current; nonlinear load; shunt active power filters; third harmonic; unbalanced load second harmonic DC link; Active filters; Harmonic analysis; Mathematical model; Power harmonic filters; Time frequency analysis; Voltage control; Active filter; Harmonics; Three-phase system; Voltage Source Inverters (VSI);
Conference_Titel :
Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-61284-167-0
Electronic_ISBN :
978-90-75815-15-3
