Peculiarities of Frequency Transients in Isolated Baltic Power System

摘要

Synchronous operation of Baltic and Continental Europe transmission systems is a strategic objective as a step towards the full integration of the Baltic electricity market into the European Union common electricity market. The power system intended to interconnect with Continental Europe power systems must meet particular requirements. One of these requirements is the ability of the power system to operate autonomously at different seasonal conditions. Isolated Baltic power system is considered as a small power system with large power generating units. In such systems, it is hard to maintain the sufficient primary, secondary and tertiary power reserves that are necessary for frequency stability and frequency transients within safe margins. The system should operate with the smallest available loads of large power generating units at different operating conditions in order to ensure that power reserves are sufficient. For the assessment of the adequacy conditions [1, 2], it is necessary to investigate power balancing capabilities to meet the frequency control requirements in case of significant change of load and hardly predictable generation variation of the renewable energy sources.