文档介绍：Digital Voltage and Current Controllers for Three-Phase PWM Inverter for UPS
Applications
Fernando Botterón, Humberto Pinheiro, Hilton A. Gründling, José R. Pinheiro, Hélio L. Hey
UFSM/CT/DELC/NUPEDEE
ZIP CODE: 97105-900 – Santa Maria, RS – Brazil
E-mail: ******@, ******@
Abstract – This paper proposes discrete time voltage and current which is normalized to couple with limited dynamic range of
controllers for three-phase PWM inverters used in UPS a fixed-point DSP implementation. Section III presents the
applications. An accurate state space discrete model of the
PWM inverter-filter-load, which takes into account non- LC Filter design. Section IV presents voltage and current
linearities and propagation delays associated with a real time controller design. Section V proposes an anti-windup
digital implementation, is derived for the controller design. The strategy, while Section VI presents experimental results from
output voltages and inductors currents are dynamically limited a 15kVA inverter prototype. Finally, Section VII summarizes
by means of MIMO controllers designed using optimal servo
linear quadratic regulators, which ensure stability for the the main points of this paper.
system at all operating conditions. In order to ensure smooth
II. DISCRETE NORMALIZED PWM INVERTER MODEL
transitions a