Research On Distributed Robust Optimization Of Comprehensive Energy Multi-Microgrid Considering Wind Power And Photovoltaic Uncertainty

In the context of achieving carbon peak and carbon neutrality,clean energy has been widely used and developed.There is randomness and volatility in the output of new energy sources such as wind power and photovoltaics,which brings problems in stability,safety and economy to the power system.The establishment of a safe and reliable economic dispatch model of microgrid containing clean energy is of great significance in improving the operation level of the power system and promoting clean energy consumption.Firstly,on the basis of introducing the uncertainty of wind power and photovoltaic output,a robust optimization method and related mathematical models to deal with the uncertainty problem are given,and the corresponding solution strategies are expounded.Considering the conservative problem of traditional robust optimization,the classification of distributed robustness and the construction method of fuzzy sets are introduced,and the solution ideas of models under different fuzzy sets are summarized.Secondly,based on the introduction of the structure and mathematical model of the combined cold,heating and power microgrid,the dispatching strategy of the integrated energy microgrid considering wind and solar uncertainty is formulated,taking the fuel cost,operation and maintenance cost and interaction cost with the power grid as the objective function in the microgrid,and under the constraints of power balance and unit output,the target is decomposed into the main and sub-problems by constructing a min-max-min two-stage model.By calculating the cost of the system at different confidence levels,the conservativeness of the model is verified.The impact of energy storage devices on the economy of microgrid in different scenarios is compared,and the role and status of energy storage devices are analyzed.Finally,in order to increase the consumption of wind power and photovoltaic,the multi microgrid economic dispatching is studied.On the basis of building the mathematical model of the multi microgrid system of combined cooling,heating and power,combined heating and power,and combined cooling and power,the carbon trading strategy is introduced,combined with the demand response mechanism,and the research is carried out with the goal of minimizing the integrated operation cost of the multi microgrid system.The example shows that the economy of the system has been improved.