Optimized operation method for AC/DC hybrid microgrid based on memetic algorithm

Abstract

An optimized operation method for an AC / DC hybrid microgrid based on the memetic algorithm is characterized in that: for the AC / DC hybrid microgrid including a wind power generator, a photovoltaic power generator, a storage battery, a micro-fuel engine, a fuel cell and a diesel generator, a multi-objective, multi-constraint and non-linear optimized operation mathematical model is established, theobjective function considers the grid power purchase cost, micro-source fuel cost, environmental benefit cost, network loss and operation and maintenance cost, and constraint conditions of the microgrid internal power balance, public connection point transmission capacity, controllable micro-source climbing rate, the upper and lower limits of the battery charge and discharge per unit time, the upper and lower limits of the battery state of charge, the power balance of the battery before and after the time period, and the unchanged battery state of charge are obeyed; the memetic algorithm is used to solve the AC / DC hybrid microgrid mathematical model; the correctness and validity of the optimized operation method of the AC / DC hybrid microgrid based on the memetic algorithm are verified. Themethod can effectively solve the multi-objective and multi-constraint nonlinear optimization objective function, and improve the microgrid economic benefit and environmental protection benefit.

Description

technical field [0001] The invention relates to an optimal operation method of an AC-DC hybrid microgrid. In particular, it relates to an AC / DC hybrid microgrid optimization operation method based on cultural gene algorithm. Background technique [0002] With the depletion of traditional energy sources, new power generation methods such as wind power generation and photovoltaic power generation have attracted the attention of scholars at home and abroad due to their good environmental benefits. Microgrid is a new type of power supply network including distributed energy, loads, energy storage and other devices. It has become a hot spot at home and abroad because of its advantages of timely consumption of new energy and the realization of complementary utilization of various forms of micro-sources. . At present, the types of loads are becoming more and more abundant, and the reliability of power supply for DC loads has become a major academic topic. [0003] The AC-DC hybr...

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used intelligent algorithm has a good optimization effect, but there are still some problems such as slow convergence speed or failure to meet the convergence accuracy requirements, so it is necessary to try a new intelligent algorithm

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