STEADY-STATE MATHEMATICAL-MODELS OF BATTERY STORAGE PLANTS WITH LINE-COMMUTATED CONVERTERS

Battery storage plants can be interfaced to electric power systems by AC/DC line-commutated converters, whose behaviour is strongly influenc ed by AC and DC side interactions and which can work in non-ideal cond itions such as those arising from voltage harmonics and unbalances. Th e paper presents mathematical models of battery storage plants with co nventionally and non-conventionally controlled line-commutated convert ers; the aim is to carry out a complete harmonic analysis in steady-st ate non-ideal conditions. The models, built-up including the DC side r epresentation in the converter modelling, can be directly employed in an iterative harmonic analysis of a power system with converters. Nume rical simulation results are also discussed.