Microprocessor-based modified discrete integral variable-structurecontrol for UPS
Tzuen-Lih Chern
Chang, J.
Chien-Hung Chen
Hann-Tzong Su
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Apr 1999
Volume: 46,
Issue: 2
On page(s): 340-348
ISSN: 0278-0046
References Cited: 10
CODEN: ITIED6
INSPEC Accession Number: 6221686
Digital Object Identifier: 10.1109/41.753773
Current Version Published: 2002-08-06
Abstract
This paper presents a digital signal processor
microprocessor-based high-performance uninterruptible power system
(UPS). It also modifies the integral variable-structure control (IVSC)
approach to be more suitable for the UPS, which is tracking a sinusoidal
AC voltage with specified frequency and amplitude. Since the
implementation of the control laws has tended to the digital
microprocessor, the paper extends the modified IVSC to the discrete time
domain. Procedures are developed for determining the control function,
the switching plane and the integral control gain, so that the system
has desired properties. Simulation and experimental results show that
the proposed scheme can supply a high-quality voltage power source in
the presence of load disturbance and parameter variation
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