Research And System Design On Economic Dispatch In Multi-energy Power System

Energy is the driving force of the development of our national economy.Meanwhile,it is the important guarantee for sustainable development of our nation.In recent years,In order to relieve the energy crisis and environment protection,countries around the word are introducing clean and renewable energy such as wind and solar power into power system,so as to realize the diversification of the forms of energy in power industry.In order to effectively coordinate the operation of the renewable energy power and conventional energy power,improve the utilization of renewable energy,it is necessary to optimize the energy of the multi-energy hybrid power system.Considering the uncertainty of wind power output,it is of great significance to the safe operation of power grid to ensure that a dispatch scheme has some robustness under the disturbance of wind power.In this thesis,the energy optimization dispatch of multi-energy hybrid power system and robust economic dispatch of power system containing wind power are studied.The main works of this dissertation are summarized as follows:1)The energy optimization model of the wind,photovoltaic,thermal,battery power system with the minimization of fuel expense as target is established on the analysis of the characteristics and mathematical model of wind turbine,photovoltaic modules,thermal power units and battery.The model is solved by LINGO optimization software,and the rationality of the model is demonstrated by experiments.The dispatch scheme can effectively reduce the system total power generation cost,and has high practical value.2)Considering the uncertainty of wind power output,the dynamic economic dispatch model of power system containing wind power is transformed into the robust economic dispatch model based on the effective objective function,and a robust evolutionary algorithm is designed.Besides,in order to speed up the convergence speed of the algorithm,priority list strategy,individual revision strategy and elite strategy are introduced.The algorithm is applied to the IEEE-10 machine simulation system,and the experimental results are analyzed from the effect of the error of the wind power output on robust solutions and the robustness of the robust optimal solution.3)Based on Service-Oriented Architecture(SOA)and Domain-Driven Design(DDD),a software framework of clear structure and stable performance is developed with.NET 4.Based on this framework and the energy optimization model of the wind,photovoltaic,thermal,battery power system,the design and development of the energy optimization system of the multi-energy hybrid power system is completed.Through the system simulation,the energy optimization and management of the hybrid power system is vividly displayed,and it is of great significance to the actual power grid dispatch.