Optimal and reliable control of power systems in the framework of large-scale renewable energy

Objective of the research is to develop technical solutions to ensure optimal and sustainable operation of Estonian power systems after its synchronisation to Western-Europe considering renewable integration 100% objectives. Traditional power system control principles developed for synchronous machines-based system are not anymore valid for converter-based system as the complexity of system increases when solar and wind plants and energy storage devices are connected. Therefore control solutions, which enable to determine system state, its parameters and ensure cooperation between different plants, are developed. As part of the activities, a digital twin of the power system is created, algorithms defining the state of the system in real time are developed, and comprehensive knowledge of control of power systems and possible influencing factors is obtained. This enables to ensure the connection of large-scale renewable energy to the power system and increase operational reliability.