Research On Optimal Scheduling Of CCHP Microgrid With Photovoltaic Source

With the emergence of environmental issues and the intensification of the energy crisis,developing new energy sources and changing energy use structure have become the focus of current research.Photovoltaic power generation is widely used because of its zero pollution and low cost.It effectively alleviates the pressure of environmental pollution and provides a viable solution to the problem of energy depletion caused by the drastic reduction of traditional fossil energy.As a form of current power production and consumption control,CCHP makes full use of the advantages of various distributed power generation in the system,and effectively solve the problem of low energy utilization rate of traditional distribution system while meeting the load demand.it has highly energy efficiency and flexible system control.In this paper,PV generation is introduced into CCHP system.Based on solving the MPPT problem of PV generation,the dynamic economic dispatch of micro-grid system is studied and analyzed.This paper establishes its physical model and engineering model to study the output characteristics of PV cells under light and temperature abrupt conditions based on the working principle of PV generation;and analyzes the influence of partial shading condition on the output power of PV array;the principle and solution of hot spot effect are illustrated,and the output characteristics under this condition are simulated.This paper analyzes the principle of MPPT and three traditional MPPT control methods,and simulates the INC,CVT,P&O.Then an MPPT control algorithm,FFA algorithm is proposed.The simulation experiments verify the effectiveness of the algorithm in partial shading condition and dynamic environment.By an example simulation,the PV output power curve of a typical weather day is obtained,which lays a foundation for the dynamic economic dispatch of the CCHP system.Finally,the difference between CCHP system and traditional distribution system is introduced,and illustrates the energy flow mode of CCHP system.The photovoltaic power generation is introduced into the CCHP system,and establishes the model including PV,micro-combustion engine and other distributed power sources.Analyzing and establishing the model of distributed generation in CCHP system.Constructing a mathematical model with the combined cost of the system operating cost and the environmental governance cost as the objective function,including the system load demand equation constraint and the device inequality constraints.On the basis of SFLA,using the mutual attraction mechanism of fireflies,a leapfrog-firefly algorithm based on chaotic map(ISFLFA)is proposed and applied to the economic dispatch of CCHP system.By analyzing the load characteristics of three different weather days,the ISFLFA algorithm is used to optimize the distributed power output when the total cost is lowest.The experimental results verify the effectiveness of the algorithm and provide a reference for the dynamic economic dispatch of CCHP system.