A novel control of a current source active filter for AC power system harmonic compensation

Author

Hayashi, Yoichi ; Sato, Noriaki ; Takahashi, Kinzo

Author_Institution

Coll. of Sci. & Eng., Aoyamagakuin Univ., Tokyo, Japan

fYear

1988

fDate

2-7 Oct. 1988

Firstpage

837

Abstract

A novel control strategy for an active power filter which consists of a current-source PWM (pulsewidth-modulated) converter and LC filters to eliminate PWM carrier frequency components is proposed in order to obtain good harmonic-compensation characteristics. The PWM converter is controlled by the feedback loops of filter input currents and their derivatives to suppress the transient oscillations in LC filters without inserting damping resistors. Analyzing the control system as a sampled data system, optimum values of feedback gains are investigated, that is, the cutoff frequency of the optimum design is about one-seventh of the PWM carrier frequency, and the compensation delay time is two times as large as the carrier period. The performance of the active power filter with the proposed control strategy is confirmed by experiments.<>

Keywords

active filters; compensation; harmonics; power convertors; power systems; pulse width modulation; transients; AC power system harmonic compensation; PWM carrier frequency components; PWM converter; control strategy; current source active filter; damping resistors; feedback loops; harmonic-compensation characteristics; transient oscillations; Active filters; Control system analysis; Cutoff frequency; Damping; Feedback loop; Frequency conversion; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Resistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1988., Conference Record of the 1988 IEEE

Conference_Location

Pittsburgh, PA, USA

Type

conf

DOI

10.1109/IAS.1988.25158

Filename

25158