Peak sheaving and valley filling method for grid-connected microgrid containing wind-light-storage-electric vehicle

Abstract

A peak sheaving and valley filling method for a grid-connected microgrid containing a wind-light-storage-electric vehicle belongs to the field of power grid management. A microgrid management strategyis divided into a peak sheaving and valley filling stage and a power fluctuation suppression stage, peak and valley adjustment of a distributed renewable energy-containing microgrid connection line is achieved by matching of slow charging time of a translation electric vehicle and charging and discharging of a storage battery, and a high-frequency component and a low-frequency component in powerfluctuation are respectively suppressed by a supercapacitor and the storage battery and by considering short-term power fluctuation of the connection line caused by fast charging of the electric vehicle. By the method, energy optimization and coordination of the grid-connected microgrid containing the wind-light-storage-electric vehicle can be achieved, the electric energy quality of a circuit isensured, and the running economy of the microgrid is improved.

Description

technical field [0001] The invention belongs to the field of power grid management, and in particular relates to an operation management method for a grid-connected micro-grid. 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. 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 the short-term power of ...

AI Technical Summary

Problems solved by technology

However, although the existing patents 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. Cooperative management of electric vehicle groups and microgrid energy storage systems is not carried out according to the time scale under different energy management tasks

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