Structural-Parametric Optimization of Automatic Control System for Power Unit 300 MW

The structural-parametric optimization of the automatic control system for power unit (ACSPU) 300 MW of Lukoml'skaya GRES (Lukoml Local Condensing Power Plant) is under consideration in the paper during both constant and variable steam pressure upstream modes of the turbine. Eight units of the Lukoml'skaya GRES implemented the ACSPU with a leading boiler power controller between 1974–1979. At the moment, these systems no longer meet all the frequency control quality requirements. In 2016, the daily schedule of electrical loads of the Belarusian power system was as follows: the basic part of the schedule of electrical loads was covered by combined heat and power plants (CHP) and by mini-CHP, which are the least maneuverable of the power plants; the semi-peak part of it - by local condensing power plants Lukoml'skaya GRES and Berezovskaya GRES, the peak part - by import electrical energy from neighboring power systems. The second unit of the Belorussian nuclear power plant (NPP) was put into operation in 2023. After the launch of the Belorussian NPP, it covers basic part of load curve; CHPs cover the semi-peak part, while the peak part of load curve is covered by local condensing power plants. Correspondingly, due to the alteration of the structure of daily schedule of electrical loads of the Belarusian power system, it is necessary to improve the efficiency of Lukoml'skaya GRES power units as well as of the entire Lukoml'skaya GRES in general. This can be achieved through the methods of structural-parametric optimization of the typical ACSPU proposed in this paper. As a result, both the control power quality as well as the environmental performance of entire power plant will be imnroved.