Experimental Verification of Stabilization Method for Residential DC System Based on Passivity Criterion

Abstract

This paper presents a stabilization method using a passivity-based criterion for a residential dc system. In a dc system, we assume a dc distribution board that can be attached and detached to the dc output equipment flexibly. In previous researches, stable criteria based on the impedance ratio conditions were proposed. These criteria can treat one-way power transfer from a power source to a load. However, if a system has equipment that can change the power flow direction such as secondary batteries, it is difficult to apply the impedance-based conditions. We studied a stabilization method using a passivity-based stability criterion in a residential dc system. Positive Feed-Forward (PFF) control was adopted to satisfy the passivity-based stability criterion. Experimental results show that the input bus voltage of a buck converter was stable when it satisfied the passivity condition.