An optimal ratio method for hybrid energy storage capacity of multi-source complementary micro-grid with wind and water

Abstract

The invention discloses a wind, light and water-containing multi-source complementary micro-grid hybrid energy storage capacity optimal proportion method. According to the method, an annual output power curve of wind power generation, photovoltaic power generation and hydroelectric generation is simulated according to the distribution condition of natural resources such as wind, light and water, an annual load curve of a micro-grid is combined, system cost and power fluctuation are used as target functions, accumulator capacity and super-capacitor capacity are used as optimization variables, and meanwhile constraint conditions such as power balance constraint, maximum instantaneous power constraint, power supply reliability constraint, super-capacitor charge and discharge current and voltage constraint and accumulator SOC (System On Chip) constraint are determined to establish a wind, light and water-containing micro-grid hybrid energy storage optimization configuration model; optimized solution of the target functions is performed by using a fuzzy decision-containing multi-target planning GA-PSO (Genetic Algorithm-Particle Swarm Optimization) algorithm to obtain the optimal proportion of the hybrid energy storage capacity. Compared with the conventional GA algorithm and PSO algorithm, the method has the advantages that the convergence rate is higher and the problem of mutual conflict of the target functions in the multi-target optimization algorithm is avoided better.

Description

technical field [0001] The invention relates to a method for optimal proportioning of micro-grid hybrid energy storage capacity including wind and water multi-source complementary micro-grid, which belongs to the technical field of micro-grid hybrid energy storage. Background technique [0002] Compared with traditional fossil energy sources such as coal and oil, energy sources such as wind energy, solar energy, and water energy have the characteristics of less pollution, large reserves, and renewable energy. Increasing the development of these clean energy sources and realizing their large-scale utilization will play a major role in alleviating the current The world's serious environmental pollution and resource depletion are of great significance and have become a focus of the current power industry. [0003] However, renewable clean energy such as wind energy, solar energy, and water energy all have the characteristics of volatility, among which wind energy and solar ener...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a hybrid energy storage capacity optimal ratio method for multi-source complementary micro-grids composed of renewable clean energy wind, light and water.

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