Large-Scale Offshore Wind Farm Electrical Collection Systems Optimization

As a renewable energy,wind power is becoming more and more widespread concerned.Offshore wind power has become a research hotspot for many countries and entered a rapid development stage,credit the higher the density of offshore wind energy resources, and its relatively stable, etc.Although the construction of large offshore wind farm wind power will become an important way, but in the current stage, the development of offshore wind energy resources, there are still some technical issues to be resolved urgently. This paper will study the the economy and reliability of offshore wind farm power collection system,it is the study field of wind farm planning. The cost of large-scale offshore wind farm is very high, according to the East China Sea Bridge Offshore Wind Farm project experience,about 20 million yuan/MW.The proportion of the cost for electrical collection systems in which the entire capital cost of offshore wind farm construction is reaching 15 to 30%. With the size of the offshore wind farm increases,the distance between the the coast and the offshore wind farm,there is a need to take offshore substation into consideration during the planning and design issues of offshore wind farm construction. Therefore, the study of offshore wind farm electrical collection systems optimization has become an important research topic in the research of wind power generation, by domestic and international attention.First this article summarized a complete set of factors that influence the economy and reliability in wind farm electrical collection system planning according to the characteristics of large offshore wind farm electrical collection system,and established the corresponding mathematical model. Resolved the problems that planning an offshore wind farm as planning a conventional power grid that take into account various factors, and maritime special factors.In chapter 3,the paper has established a set of optimization algorithm according to the mathematical model that has been built already,which is going to slove the large-scale optimization problems step by step.The algorithm has solved the economic optimization model for electrical collection systems which mathematical programming in the process of high dimensionality, strong non-linear, high-complexity problems.After we got the initial planning of electrical collection systems,this paper has designed a new large-scale offshore wind farm power system reliability evaluation system with Monte Carlo simulation in Chapter IV. Defines the reliability index, summed up the evaluation process, to solve electrical collection system planning results assessment.The final chapter, this paper made the economics of collecting system optimization and reliability assessment on a practical large-scale offshore wind farm,using mathematical models and assessment procedures established by this paper. The calculation results comparison between traditional manual design, global search algorithm, genetic algorithm Etc. shows that the large-scale offshore wind farm electrical collection systems optimization and reliability assessment system that presented in this paper is fast and efficiency.It provides a scientific and quantitative planning methods and assessment tools for large-scale offshore wind farm electrical collection system planning.