Regulation of Parallel Connected Boost and Buck Converters by Passivity-Based Control

Abstract

Variety of power sources are distributed in power systems at various classes of voltage, current, and power output capacities. They must be cooperatively used through parallel connected DC-DC converters for high efficiency and reliability. This paper proposes a passivity-based control for the regulation of parallel connected boost and buck converters. It is shown that the application of passivity-based control for each converter guarantees asymptotic stability of the whole system. The stability of the system is discussed through simulation and experiment. Transient and steady-state characteristics are examined depending on the setting of feedback gain.