energy systems відновлювані джерела енергії 2 621.311.025 1 621.331 1 complex system 1 distribution networks 1 electric power engineering 1 external electric power supply system 1 greenhouse gases 1 innovative business 1 innovative project 1 integrated approach 1 integrated risk management system 1 longitudinal capacitive of compensation 1 modes of traction 1 operation of power systems 1 photovoltaic stations 1 power 1 renewable energy sources 1 solar and wind energy 1 start-up 1 sustainable development 1 traction power supply systems 1 вітроенеретика 1 електроенергетика 1 енергосистема 1 енергосистеми 1 енергія 1 комплексна система управління ризиком 1 комплексний підхід 1