Wind-photovoltaic-energy storage grid-connected microgrid in consideration of charging characteristics of electric vehicle

Abstract

The invention disclose a wind-photovoltaic-energy storage grid-connected microgrid in consideration of charging characteristics of an electric vehicle, which belongs to the field of power grid management and is a wind-photovoltaic-energy storage grid-connected microgrid architecture for distributed renewable energy. The microgrid at least comprises a power generation system, a battery, a super capacitor, an electric vehicle cluster charging pile and an energy management system, wherein the power generation system is composed of a wind turbine and a photovoltaic cell, and a hybrid energy storage system formed by the battery and the super capacitor carries out peak load shifting and power fluctuation suppression on a microgrid tie line; and the microgrid considers the charging characteristics of the electric vehicle and enables the electric vehicle and the microgrid to be connected through an AC and DC conversion element of the charging pile. In view of a slow charging mode of the electric vehicle, the electric vehicle in slow charging is regarded as translational load for adjusting the peak valley characteristics of the microgrid tie line; in view of a fast charging mode, microgridshort-time power fluctuation is regarded, and the hybrid energy storage system formed by the battery and the super capacitor is needed for leveling. The wind-photovoltaic-energy storage grid-connectedmicrogrid in consideration of the charging characteristics of the electric vehicle can be widely applied to the operation and management field of the microgrid.

Description

technical field [0001] The invention belongs to the field of power grid management, and in particular relates to a wind-solar-storage-grid-connected micro-grid used for charging electric vehicles. Background technique [0002] With the large-scale decentralized access of wind turbines, photovoltaic cells, and electric vehicle fast charging piles, the power peak and valley characteristics of the micro-grid tie-line caused by renewable energy power generation and electric vehicle fast charging are adjusted, and the short-term power of the tie-line is adjusted. Effective suppression of fluctuations is of great significance to ensure the capacity of renewable energy consumption, improve the stability of microgrid grid connection, and enhance the safety and reliability of microgrid operation [1]. However, how to reduce the microgrid investment cost and optimize the energy storage capacity under the premise of reducing the peak-valley level of the microgrid tie line and smoothing ...

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned existing technologies perform peak-valley regulation and power fluctuation control on the power of the microgrid containing electric vehicles through relevant energy management and optimization strategies, they do not comprehensively consider the impact of different charging modes of electric vehicles on the operation of the microgrid, nor do they Cooperative management of electric vehicle groups and microgrid energy storage systems according to time scales under different energy management tasks

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