Optimizing Allocation Of CCHP Micro-grid Based On Wind Power Curtailment Consumption

In recent years,the rapid development of social economy has caused the depletion of fossil energy.The efficient use of clean energy such as wind power is an inevitable trend of future development.However,the problem of wind abandoning has become an important obstacle to the development of wind power.The volatility of wind in different seasons of the year and the change of cold,heat and electric load demand on the load side are the main causes of wind abandoning.The optimal configuration of the micro-grid is one of the main ways to solve the wind abandoning.It is of great significance for the development of wind power to study the optimal configuration of the CCHP micro-grid to meet the demand of cold,heat and electric load in different seasons.This thesis focuses on the optimal configuration problem of the CCHP micro-grid,according to the changes of wind and cold,heat and electric load in different seasons of the year,considering that the cold load in the micro-grid is converted from the heat of the absorption chiller,the technical route to study to study the CHP micro-grid configuration first and then study the optimal configuration of the CCHP micro-grid is determined.Aiming at the problem that the micro-grid scheduling strategy is rarely considered in the traditional configuration,the optimal configuration strategy of the CCHP micro-grid with the introduction of scheduling strategy is studied.On the optimal configuration of the CHP micro-grid,the output characteristics of the main unit in the CHP micro-grid are analyzed,mainly includes thermal generation unit,CHP unit,wind turbine,electric boiler and thermal storage device,the corresponding models and the self-constraints of each unit are established.The two configuration schemes of configuring electric boiler and combined thermal storage device of electric boiler were studied,the operating characteristics of CHP unit under the two schemes were analyzed,the two-layer optimal configuration model with scheduling introduced in the configuration was established,the upper layer aims at the minimum sum of the micro-grid total operating cost of the heating season,configuration cost and maintenance cost,and adjusts the configuration scheme,the lower layer uses the adjusted configuration scheme and aims at the minimum 24-hour comprehensive daily operating cost of the micro-grid including the wind curtailment cost.Constraints in addition to the constraints on unit operation,the heat load balance constraints and electric load balance constraints of the micro-grid are considered.On the optimal configuration of the CCHP micro-grid,based on the configuration scheme of electric boiler and thermal storage device determined by the CHP micro-grid,according to the CCHP system should meet the typical cold,heat and electric load requirements in different seasons,the two schemes of configuring absorption chiller and absorption chiller combined with electric chiller were studied,the output characteristics,corresponding models and self-constraints of absorption chiller and electric chiller are given,and a two-layer optimal configuration model with scheduling strategy was established.The upper layer aims at the minimum sum of the total annual operation cost of the micro-grid,configuration cost and maintenance cost,the lower layer aims at the minimum 24-hour comprehensive daily operating cost of the micro-grid in each season,and adds consideration of the cold load balance constraints of the micro-grid.Finally,the genetic algorithm is used to solve the model.The optimization configuration method of CHP micro-grid is verified by the typical winter data,and the CCHP micro-grid is verified by the typical daily data of winter,summer and transition season.The simulation results show that the proposed method can effectively reduce the operating cost of micro-grid and reduce the wind curtailment power,and the optimal configuration scheme is obtained.