DSP control method of single-phase inverters for UPS applications

Author

Mihalache, Liviu

Author_Institution

Power Conversion Technol. Inc., Harmony, PA, USA

Volume

1

fYear

2002

fDate

2002

Firstpage

590

Abstract

This paper presents a new deadbeat control solution and a digital control strategy suited for high performance single-phase inverters capable to maintain very low THD of less than 1% in presence of unknown loads (linear or highly nonlinear). The method takes into account the digital model of the PWM inverter and derives a new set of gains for the voltage and current loops. The current loop gain obtained by this approach is shown to be higher than previously known and this leads to a better disturbance rejection and faster dynamic response. The control strategy was implemented on a 16-bit fixed-point DSP controller (ADMC401) and tested on a 5-kVA IGBT-based inverter switching at 20 kHz

Keywords

PWM invertors; digital control; digital signal processing chips; electric current control; switching circuits; uninterruptible power supplies; voltage control; 16-bit fixed-point DSP controller; 20 kHz; 5 kVA; ADMC401; DSP control method; IGBT-based inverter; PWM inverter; UPS applications; current loops; deadbeat control solution; digital control strategy; high performance; single-phase inverters; very low THD; voltage loops; Automatic control; Digital control; Digital signal processing; Feedforward systems; Insulated gate bipolar transistors; Open loop systems; Power harmonic filters; Pulse width modulation inverters; Uninterruptible power systems; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE

Conference_Location

Dallas, TX

Print_ISBN

0-7803-7404-5

Type

conf

DOI

10.1109/APEC.2002.989304

Filename

989304