Abstract
Increasing the share of gas turbine power plants is an integral part of the development of distributed generation and electric power sector as a whole. The fact that the power output of gas turbine units depends on the compressor shaft rotation frequency is a circumstance that has a significant influence on the frequency control quality in the power system. The frequency control process triggered by the occurrence of active power deficiency in the system was modeled taking the Western part of the Kazakhstan United Power System as an example. The numerical analysis was carried out for the scheme with the real share of gas turbine power plants in the total installed generating capacity in the power system. Versions with different shares of such generating units are considered. The limit share of gas turbine power plants at which the frequency drops to the upper setpoints of the automatic frequency load shedding systems is determined. The frequency control quality is analyzed subject to fulfilling the regulatory requirements that are currently in force for the amount of primary active power reserve. The effect an increase in the amount of primary active power reserve has on the frequency control quality is estimated.
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