Research On Integrated Load Modeling Of Distribution Network With Distributed Generation For Multiple Energy Industrial Parks

With the industrial development of our country,the emergence and construction of industrial parks have great significance in the history of China's economic development.Its load research has always been one of the hot issues.With the advantages of distributed generation,flexible installation,less investment,high efficiency,and greatly improved the performance of the traditional centralized grid.,it has made considerable progress in recent years.With the gradual maturity of distributed power supply technology,the application scope is wider.For example,residential households introduce solar energy,wind power generation assistance and so on.While a variety of distributed energy sources have been introduced into the operating characteristics of the industrial park distribution network,the original load model has not been well described.Therefore,with the increasing of the access capacity of distributed power supply,this article studies the power system load conditions in industrial parks,and is divided into the following sections for research.The first part is based on the load characteristics of the modern industrial park.After analyzing and comparing the advantages and disadvantages of the commonly used load modeling methods,the overall method is used for modeling and a comprehensive load static admittance model is constructed.A mathematical model for distribution network integrated load for industrial parks was established.At the same time,the identification algorithm was compared and analyzed.The chaotic particle swarm optimization algorithm with better features was used to complete the model identification of the model,and verified by application simulation and examples.The validity of the model.The second part discusses the function and necessity of the virtual synchronous generator before connecting the distributed power supply,and builds the mechanical model and electromagnetic model of the virtual synchronous generator.The virtual synchronous generator introduces virtual phase angle,damping coefficient and virtual moment of inertia,making the virtual synchronous generator have the characteristics of an actual synchronous generator.The control model and energy storage control model of the virtual synchronous generator were designed to prepare for the access of the distributed power supply.The fourth chapter builds distributed power generation models such as wind power,photovoltaic,micro gas turbines,and fuel cells based on the integrated load model of the industrial park distribution network.It is connected to the distribution network model based on the first part and validated,due to new energy sources in recent years.With the rapid development of automobiles,the impact of charging piles on the power grid is not negligible.Therefore,considering the impact of electric vehicle charging piles on industrial parks,an electric vehicle charging pile model was established as a dynamic load model with positive power consumption.Access to the second part of the distribution network through the virtual synchronous generator control strategy for modeling analysis.