Multi-Rate Repetitive Controller for UPS Applications

Author

Stefanello, Márcio ; Pinheiro, Humberto ; Gründling, Hilton Abílio

Author_Institution

Univ. Fed. de Santa Maria, Santa Maria

fYear

2007

Firstpage

2340

Lastpage

2345

Abstract

This paper proposes a modified repetitive (RP) plug-in controller for odd-harmonic suppression in a multi- rate framework. Such scheme improves the stability margin and the transient response if compared with conventional RP approach. In addition, it reduces the memory length demanded in a practical implementation. A dynamic model for the multi- rate system with a RP plug-in controller is derived and the impact of the sampling rate on the stability margins is demonstrated. Experimental in a lOkVA three-phase inverter controlled by a TMS 320F2812 is presented to support the theoretical developments.

Keywords

controllers; discrete time systems; harmonics suppression; invertors; power system control; uninterruptible power supplies; TMS 320F2812; modified repetitive plug-in controller; multirate repetitive controller; odd-harmonic suppression; pole-zero cancelation; sampling rate; stability margin; three-phase inverter; uninterruptible power supply; Control systems; Error correction; IEC standards; Inverters; Power harmonic filters; Signal generators; Stability; Transfer functions; Uninterruptible power systems; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2007. 42nd IAS Annual Meeting. Conference Record of the 2007 IEEE

Conference_Location

New Orleans, LA

ISSN

0197-2618

Print_ISBN

978-1-4244-1259-4

Electronic_ISBN

0197-2618

Type

conf

DOI

10.1109/07IAS.2007.353

Filename

4348102