AN ADAPTIVE DIGITAL CONTROL OF CURRENT SOURCE INVERTER SUITABLE FOR PARALLEL PROCESSING INVERTER SYSTEMS

摘要

This paper presents description, steady state analysis, modeling and digital control design of a single-phase CSI power supply system in stand alone mode. The multi-functional features associated with modern parallel processing inverter systems can be realized with the proposed bidirectional power conversion scheme. A detailed power circuit and controller description of the proposed power supply system are given. The steady-state analysis, of the system is performed. Continuous-time state-space model of the system, discrete-time and DARMA models of a single-phase CSI are derived. An adaptive discrete-time controller for CSI is designed in order to obtain fast transient response and low total harmonic distortion of the output voltage waveform. An adaptive controller for DC-chopper is designed in order to reduce the DC-link inductor and optimize its dynamic performance. DC-link and output filter design is performed and systematic design procedure with a design example are presented. A number of simulations are presented to illustrate the performance of the system.