Complex sentence: It allows the modelling of the entire power system from high, medium to low voltage levels, including customer plants and the description of all power system operation processes such as load-generation balance, voltage assessment, demand response.
Split into simpler sentences: It allows the modelling of the entire power system from high, medium, to low voltage levels. This includes customer plants and the description of all power system operation processes such as load/generation balance, voltage assessment, and demand response.