Details

Title

A simplified control strategy for single-phase UPS inverters

Journal title

Bulletin of the Polish Academy of Sciences: Technical Sciences

Yearbook

2014

Numer

No 2 June

Publication authors

Divisions of PAS

Nauki Techniczne

Abstract

Abstract Though there are many strategies to control single-phase uninterruptible power supply (UPS) inverters, they suffer from some drawbacks, the main being complexity. This paper proposes a simple dual-loop controller for the single-phase UPS inverter with the LC filter. The suggested control scheme uses the capacitor current as the feedback signal in the inner current loop. No fictitious phase generation or reference frame transformations are required, and simple proportional gains are employed as both voltage and current regulators. A feedforward of the derivative of the output voltage is also proposed, which significantly improves the performance of the closed loop control system. Then, based on the model of the inverter with the proposed control strategy, a simple and systematic design procedure is presented. Finally, the theoretical achievements are supported by extensive simulations.

Publisher

Polish Academy of Sciences

Date

2014

Identifier

ISSN 0239-7528, eISSN 2300-1917

DOI

10.2478/bpasts-2014-0037

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