Combined Using And Optimization Mechanism For Hydro-thermal Power Systems Based On Large-scale Power Grid

Electric power industry has played a huge role in supporting the rapid development of national economy,it has been become important areas of energy-saving because of its high consumption,high pollution characteristics,how to achieve the coordination of hydro-thermal turbine in a large-scale grid to optimize the running to become a hot issue for the current study,hydroelectric power as a clean renewable resources occupy an important position in China’s power structure. Therefore, by carrying out the hydro-thermal turbine joint coordination optimal operation, we can give full play to hydrothermal advantages, to make full use of the hydrothermal complementary mechanism to achieve efficient and economical operation of the entire power system.This paper describes the operation mechanism of the hydro-thermal turbine,power generation head,power generation flow,inflow,reservoir storage and other association between the impact of casade hydropower stations and counterbalancing factors were analyzed, the coal consumption characteristics and pollutant emission characteristics of thermal power units were studied,laid the foundation for the establishment of a hydrothermal multi-objective optimization scheduling model and to develop a reasonable plan for hydro-thermal turbine output.Traditional hydrothermal scheduling problem generally to coal consumption for thermal power units minimum and minimum pollutant emissions as optimization objectives, to ignore the network outages and hydropower units operating characteristics and requirements no longer meet the current China energy policy. Therefore, to make full use of hydropower resources as a means, combined with hydro-thermal turbine operating characteristics to establish the hydro-thermal multi-objective optimization model,the model minimum coal consumption and pollutant emissions of thermal power units,the net loss minimum and hydropower units contribute to maximizeas the goal, to take full account of various constraints,the development of rational scheduling scheme,numerical examples to verify the correctness and validity of the model.The Electromagnetism-like mechanism was studied in this paper,a detailed analysis of the basic principles and calculation of the basic EM algorithm were carried out,and the inadequacies of the basic EM algorithm has been improved. Around hydrothermal multi-objective optimization problem,this paper to solve the interactive method based on the goal of overall coordination function,provides an effective method for solving multi-objective optimization problem.A hydrothermal optimal scheduling model with the generation right trading was established on the basis of the generation right trading theory,which model is the thermal unit coal consumption minimum,constraints as energy consumption constraints, the pollutant emission constraints were taked into account,simulation results to achieve the purpose of the full use of water resources,reduce the coal consumption of thermal power units and shutting down small thermal power units, provides a new research approach for generation right trading.