Capacity configuration optimization method for alternating current-direct current hybrid microgrid

Abstract

The invention relates to the technical field of power grid planning, and in particular relates to a capacity configuration optimization method for an alternating current-direct current hybrid microgrid. A wind power generation model is established, the capacity coefficients of wind driven generators are calculated, and the wind driven generator with the maximum capacity coefficient value is selected as the model of the wind driven generator used for the final microgrid; photovoltaic and diesel engine power generation models and an energy storage and charge and discharge model are established,a mathematical model with the minimum electricity generation capacity of the energy storage diesel engine as a target function is built, and the required wind driven generator and photovoltaic maximumcapacity and the minimum capacity range required to be set by the energy storage and diesel engine are solved; a mathematical model of the total cost of the microgrid is established, the cost is optimized, optimizing is performed in the minimum capacity range required to be set by the energy storage and the diesel engine, the specific model and basic capacity of the energy storage and diesel engine are determined, the appropriate wind-photovoltaic model is selected firstly, and then the optimal capacity is calculated. The hierarchical optimization model is adopted for carrying out alternatingcurrent-direct current hybrid microgrid capacity configuration, so that the problems of complex constraint and the like during comprehensive solving are avoided, and the calculation is simpler and more convenient.

Description

technical field [0001] The invention relates to the technical field of power grid planning, in particular to an optimization method for capacity allocation of an AC-DC hybrid micro-grid. Background technique [0002] In recent years, the problem of global warming has become more and more serious, and the energy crisis cannot be ignored. The traditional energy represented by coal is facing problems such as heavy pollution and insufficient reserves. The rise of renewable energy power generation technology has made wind power generation, photovoltaic power generation and other clean and efficient New forms of power generation are gradually replacing traditional power generation models, and distributed power with wind and solar as the main force is also ushering in a development climax. As a grid model that includes a variety of distributed power sources, the microgrid integrates energy storage, load, control and protection devices, and can be used as an independent small-scale ...

AI Technical Summary

Problems solved by technology

The power generation parameters of wind turbines selected subjectively may not match the local wind resource conditions, resulting in low power generation efficiency, and the microgrid capacity optimization results obtained on this basis are not accurate, which will eventually affect the economic benefits of the microgrid

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