DSP control of three-phase voltage source UPS inverter with software controlled harmonic conditioners

Author

Byun, Young-Bok ; Joe, Ki-yeon ; Park, Sung-Jun ; Kim, Cheul-U

Author_Institution

Korea Electro-Technol. Res. Inst., Kyeongnum, South Korea

fYear

1997

fDate

19-23 Oct 1997

Firstpage

195

Lastpage

200

Abstract

In order to maintain a high quality output voltage, conventional UPS systems use complex filters with large passive components. To overcome this drawback, real-time feedback control schemes have been investigated. However, these techniques require a high inverter switching frequency to dynamically adapt to changing load conditions and reduce harmonics of the output voltage, thereby rendering the system inadequate for high power applications. This paper presents real-time digital signal processor (DSP) control of a UPS system feeding nonlinear loads to provide sinusoidal inverter output voltage. The control scheme is composed of an RMS voltage regulator, the load current harmonics regulator for the cancellation of output voltage harmonics and the output voltage harmonics regulator for system stability. The controller employs a Texas Instruments TMS320C40GFL50 DSP

Keywords

DC-AC power convertors; digital control; digital signal processing chips; electric current control; feedback; harmonic distortion; invertors; power system harmonics; real-time systems; uninterruptible power supplies; voltage control; DSP control; RMS voltage regulator; Texas Instruments TMS320C40GFL50 DSP; load current harmonics regulator; nonlinear loads; output voltage harmonics cancellation; output voltage quality; real-time digital signal processor; software controlled harmonic conditioners; switching frequency; three-phase voltage source UPS inverter; Control systems; Digital signal processing; Feedback control; Inverters; Passive filters; Power harmonic filters; Regulators; Switching frequency; Uninterruptible power systems; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 1997. INTELEC 97., 19th International

Conference_Location

Melbourne, Vic.

Print_ISBN

0-7803-3996-7

Type

conf

DOI

10.1109/INTLEC.1997.645887

Filename

645887