Open AccessAutomatic generation control of thermal power system under varying steam turbine dynamic model parameters based on generation schedules of the plants
Author(s) -
Pathak Nikhil,
Verma Ashu,
Bhatti Terlochan Singh
Publication year - 2016
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2016.0178
Subject(s) - steam turbine , thermal power station , turbine , electricity generation , automatic generation control , power (physics) , power station , thermal , combined cycle , steam electric power station , control theory (sociology) , engineering , electric power system , control engineering , computer science , mechanical engineering , control (management) , electrical engineering , physics , quantum mechanics , artificial intelligence , meteorology
This paper investigates the automatic generation control (AGC) of thermal power system operating under different power generation levels/schedules of the plants. The power system load varies considerably over the period of 24 hours and accordingly thermal power plants are planned to operate at different generation schedules. It has been discovered that the steam turbine dynamic model parameters also changes along with generation schedules of the plant. Typical steam turbine model parameters are the turbine time constants and power fractions. The literature survey reveals that steam turbine dynamic model parameters are assumed to be constant in all preceding studies pertaining to AGC systems, irrespective of generation schedules of the plant. In this paper, steam turbine dynamic model parameters have been computed for an actual 500 MW thermal unit at different generation schedules. These steam turbine dynamic model parameters have been used to study the dynamic performance of AGC system. The paper also presents the general mathematical procedure to calculate steam turbine dynamic model parameters from an actual generating unit using the heat balance data of a thermal power plant. Results for two area thermal power system demonstrate the potential of the proposed approach.