A Secondary Control Method for DC Power Systems

Abstract

There is a tradeoff between voltage regulation and power sharing in a droop-controlled dc microgrid. To tackle with this issue, this paper investigates the primary control of voltage source converter based dc MG. This paper further proposes an improved secondary control method to guarantee that the total electric load is shared between the sources in a desirable manner. Simulation studies and experimental validation confirms the effectiveness and performance of the proposed secondary control method.