Research On The Architecture Of The Resilient Microgrid

With the development of information technology and advanced manufacturing,people put forward higher and higher demands on the quality of power supply.In order to meet this requirement,the concept of resilient microgrid(also known as super-UPS)has emerged,which is the evolution of the traditional uninterruptible power supply(UPS),which includes a variety of energy sources(such as grid,gas,solar),multiple energy storage elements(such as batteries),and through the high-performance power electronic converter,it becomes a very reliable power supply system.In a resilient microgrid composed of multiple sources of energy,the power architecture determines efficiency,cost and reliability,and its importance is self-evident.Therefore,this paper focuses on the related research on the power supply architecture.The first chapter of this paper summarizes the development of power supply technology and introduces the concept of resilient microgrid.This paper reviews the research status of resilient microgrid,and points out that at present,the research on architecture at home and abroad only stays at the stage of case study,that is,it is only through manual means and experience to analyze and compare a limited number of system structures.Therefore,it is necessary to explore the methods of automatic generation and analysis of power architecture.At the same time,the shortcomings of calculation methods(reliability diagram and Monte Carlo method)in computing speed and efficiency of existing power architecture are also introduced in this paper.The second chapter of this paper compares AC and DC power distribution architecture for data center power supply.Today data center power supply and distribution systems are generally equipped with grid,diesel generators and batteries,and can be regarded as a relatively simple resilient microgrid.In this chapter,we first introduce the power system architecture of different redundancy levels in the data center,and then compare the four investigation reports on the efficiency of AC andDC power distribution architecture.Finally,the simulation software based on Monte Carlo method is used to compare the availability of several AC and DC power distribution architectures.In view of the problem that the current study on power supply architecture is mainly based on manual analysis,the third chapter of this paper discusses a power architecture optimization algorithm based on graph theory.The algorithm is divided into two parts:the first part is the architecture generation algorithm,and its function is to generate all the legal architectures;the second part is to calculate the cost,the efficiency and the availability of the generated legal architectures,and to select the optimal power architectures.The paper analyzes and discusses the case of multiple resilient microgrids.The fourth chapter of this paper summarizes the research work,and discusses the prospects and shortcomings of this study.