Application Research Of Multi-energy Complementary Microgrid Based On Energy Efficiency In Industrial Parks

Energy is an important material basis for human survival and development,but from a global perspective,the issue of sustainable energy development has not been fundamentally resolved.Under the dual pressures of energy demand and environmental protection,the use of clean energy is increasingly infiltrating into all aspects of human development.For example,large-scale construction of distributed photovoltaics,holdings of electric vehicles are rising year by year,the promotion of use Electricity(Natural Gas)instead of Coal and so on,More and more scenario applications show that the transformation of traditional energy application structure is imperative.In China,the development of the industry has always been a lasting driving force for economic growth,and industrial electricity has also belonged to the “ballast stone” of the whole society for a long time,studying the power consumption strategy of industrial parks and improving the park.It is also a future development trend to build an ecological,green and high-efficiency industrial park that meets the needs of modern society with energy efficiency.Based on the fact that most industrial parks still use electricity in a unified distribution of traditional urban distribution networks,or only a small number of distributed power sources are connected,this paper proposes to build a multi-energy complementary microgrid to accommodate the integration of multi-energy distributed energy.With access and optimal operation cost,an optimized control strategy model is proposed to realize the application of step,coordinated control and comprehensive energy efficiency management of various energy sources such as cold,heat and electricity.The main research work of this paper includes the following aspects:(1)The networking structure of multi-energy complementary microgrid is constructed.The network architecture can accommodate multiple distributed energy accesses to realize diversified energy demand forms in industrial parks.Different forms of industrial parks are given in the form of energy collection lines.The energy supply and demand balance equation is used,and the linkage design of various energy uses in the park is analyzed and explained.The energy flow balance of the cold,heat,electricity and gas loads in the park is theoretically realized,which lays a foundation for the subsequent chapters of the regulation and operationstrategy research.(2)Aiming at the regulation and operation of multi-energy complementary microgrid,an optimal energy efficiency regulation strategy is proposed.The strategy aims at optimizing the energy consumption cost of the multi-energy complementary microgrid in the industrial park.By analyzing the energy model of each device in the energy supply system,the economic operation regulation model is established,and the model is solved by the dynamic programming algorithm.Production matching plan for various energy supply systems.Using the hierarchical control as the hierarchical control principle,and the total coordination control layer,the energy subsystem coordination control layer,and the micro-source subsystem layer jointly complete the regulation and operation of the entire micro-grid.In the development stage of the regulation plan,based on the economic considerations of the multi-energy complementary microgrid in the industrial park application,the regulation strategy is integrated with the peak or flat or valley electricity price mechanism,and the regulation schemes of electric energy,cold energy and heat energy supply are separately formulated.(3)Taking the multi-energy complementary microgrid in an industrial park in the north as an example,based on the computing environment of MATLAB software,the simulation and calculation of the energy efficiency optimal operation regulation strategy proposed in this paper is carried out.The typical summer and winter typical days are selected to calculate the cooling and heating energy supply control schemes.The simulation results verify the reasonable effectiveness of the energy efficiency optimal operation regulation strategy proposed in this paper.