Analysis of operating modes of power transmission lines connecting TPP with a capacity of 1400 MW with units 2x200 + 2x500 MW to the power system
Students Name: Medvediev Maksym Anatoliiovych
Qualification Level: magister
Speciality: Power Stations
Institute: Institute of Power Engineering and Control Systems
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Thermal power plants (TPPs) on fossil fuels have been the main industrial source of electricity in Ukraine and the world for many decades. The main sources of primary energy for thermal power plants are fossil fuels - coal, natural gas and oil. Improving the efficiency of thermal power plants is a natural process, dictated by the need to compensate for the ever-increasing costs of the fuel cycle. Exploration, development and operation of new oil, gas and coal deposits, as well as the completion of existing ones, are becoming increasingly expensive, and maintaining reasonable electricity prices requires an adequate advance of TPP efficiency. In addition, the need to increase efficiency is dictated by environmental considerations. The object of research is a condensing power plant with a capacity of 1400 MW with units 2x500 + 2x200 MW. The subject of the research is the established and post-emergency modes of power transmission lines. The purpose of the work is to analyze the results of calculation of steady-state and post-accident modes of power plant operation in relation to the capacity of overhead lines, their overloads and to form a conclusion about the possibility of realization of the developed condensing power plant. A scheme of a promising condensing power plant with a capacity of 1400 MW has been developed [1-4]. In the software complex DAKAR [5] the digital model of the developed scheme of CES is formed. The following modes were calculated: Maximum generation mode from CES tires a) maximum consumption of EC№2 b) minimum consumption of EC№2 Minimum generation mode from CES tires a) maximum consumption of EC№2 b) minimum consumption of EC№2 Post-emergency mode (disconnection of 220 kV line) at maximum generation from CES buses a) maximum consumption of EC№2 b) minimum consumption of EC№2 Post-emergency mode (disconnection of the 500 kV line) at the maximum generation from CES buses a) maximum consumption of EC№2 b) minimum consumption of EC№2 Post-accident mode (generator shutdown №4,200 MW) at maximum generation from CES tires a) maximum consumption of EC№2 b) minimum consumption of EC№2 From the calculations given in Annex A, it can be concluded that this power plant has the right to sell, because in all the above modes, all power lines operate in normal modes without overload. The results of the study - from the results of calculations we can conclude that this power plant has the right to sell, because in all the above modes, all power lines operate in normal modes without overload. Key words: power system, power station, overhead lines, substations, steady state, post - emergency mode, current, voltage.References 1. Segeda M.S. "Electrical Networks and Systems" Lviv 2007. Lviv Polytechnic State University Publishing House. 488 s. 2. L.D. Rozhkova, VS Kozulin "Electrical equipment of stations and substations" M., Energy1980. 3. B.N. Neklepaev, Y.P. Kryuchkov "Electrical part of power plants and substations" M. Energoatomizdat1989. 4. Technical operation of power plants and networks. Rules. The first official edition. Ministry of Fuel and Energy MPC 34.20.507-2003 - Kyiv 2003 - 598 p. 1977 5. https: //dakar.eleks.com /