Engineering configuration method of independent wind-diesel-storage micro grid system capacity

Abstract

The invention provides an engineering configuration method of independent wind-diesel-storage micro grid system capacity. The engineering configuration method includes the following steps: A, collecting local actual measurement loads and wind speed history data, and constructing a load and wind speed prediction curve of a whole life cycle according to a timing sequence mode; and B, performing preliminary model selection on a wind generation set, a diesel generation set and an energy storing device according to the curve obtained in the step A, and determining unit capacity and quantity limiting value of each distributed power source. The engineering configuration method of the independent wind-diesel-storage micro grid system capacity can accurately select configuration of the independent wind-diesel-storage micro grid system capacity, optimizes the capacity configuration, provides practical and effective scientific bases for planning and design of independent wind-diesel-storage micro grid system engineering, can reduce power supply cost of a system to the minimum on the premise of satisfying load requirements, and is simple in method and suitable for engineering calculation.

Description

technical field [0001] The invention relates to the technical field of microgrid applications, in particular to an engineering configuration method for the capacity of an independent wind-diesel-storage microgrid system. Background technique [0002] According to the "Renewable Energy Medium and Long-Term Development Plan" report, as of 2012, there are still tens of millions of people living in areas without electricity in China. Since these areas are far away from the public power grid, when using conventional power supply methods, they are faced with large losses in long-distance transmission and High construction costs and other issues. In remote mountainous areas and isolated islands with rich wind resources, microgrids are attracting increasing attention due to their low investment, quick results, and flexible structure. In these areas, an independent wind-diesel-storage system can be built The micro-grid power supply system can solve the problem of local residents' el...

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Problems solved by technology

At present, research in this area is mainly aimed at optimizing the energy storage capacity for the purpose of smoothing output or peak-shaving and valley-filling when the capacity of wind turbines is determined, and has not discussed the optimal configuration of power sources for the entire microgrid system; The ideal mathematical model of each distributed power supply with factors such as battery charge and discharge rate and operating life, with the least total investment as the objective function, and power supply reliability as the constraint condition, to determine the optimal configuration of the system power supply, but these studies are more What is more important is to focus too much on the advanced nature of the algorithm, which leads to poor engineering practice

[0004] It can be seen that the existing optimal configuration method for the power supply of the microgrid system has obvious deficiencies and defects in the use process, and needs to be further improved. Therefore, how to create a method that can ensure the stability and reliability of the microgrid system Accurately select the capacity of the micro-grid system, comprehensively evaluate the economics of each distributed power source, and strive for the lowest power supply cost in the life cycle of the micro-grid system, and the calculation is simple, which is very suitable for the engineering configuration of the capacity of the independent wind-diesel-storage micro-grid system for engineering calculations method, which is one of the important topics of current research and development

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