Abstract
Analysis of peculiarities of frequency stability and transient processes in isolated Baltic power system is presented. Significant variation of loads and large capacities of operating generating units are common for this system. The method of evaluation of primary power reserve is described. Characteristics and responses to frequency deviation of generating units’ turbine speed governors are presented. Possibilities of frequency control are described. Frequency transients caused by disturbances are simulated for different specific seasonal operating conditions of Baltic power system: winter peak load, summer low load and spring melt-water season. The design conditions are composed according to forecasted load of 2020. The composition of operating generators is formed considering to the recommended adequacy methodic of ENTSO-E. Ill. 3, bibl. 7, tabl. 3 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.116.10.870
Highlights
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 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
If the relative value of power reserve Pres* corresponding to the generating units participating in primary control is known, the total necessary rated capacity participating in primary control and covering the total power loss equals to Generally, the primary power reserve of generating units is approximately equal to 5 % of the rated capacity, i.e. Pres* equals to 0.05
Summary
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 most extreme conditions may occur in a small power system with large capacity generating units at low loads. Operating Baltic power system is considered as a small power system with large generating units and relatively low loads [3]. The analysis is based on different seasonal forecasted load and generation conditions of 2020
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