A microgrid energy management method based on hybrid energy storage and electric vehicles

Abstract

A microgrid energy management method based on hybrid energy storage and electric vehicles belongs to the field of power grid management. Its microgrid is a wind-solar-storage grid-connected microgrid of distributed renewable energy. The energy management method of the microgrid divides the energy management strategy into a peak-shaving and valley-filling stage and a power fluctuation suppression stage; in the peak-shaving and valley-filling stage , based on wind power, photovoltaic and other distributed renewable energy generation forecasting and load forecasting technology, the slow charging period of electric vehicles is shifted through price subsidies, and the charging and discharging of energy storage batteries and the power interaction between the microgrid connection line and the external large power grid are coordinated. , so as to realize the peak-shaving and valley-filling of the power of the micro-grid tie line; in the power fluctuation suppression stage, considering the output fluctuation of wind power generation and photovoltaic power generation, and taking into account the high power and high random characteristics of electric vehicle fast charging, the supercapacitor It forms a hybrid energy storage system with the energy storage battery, and jointly suppresses the power fluctuation of the microgrid tie line; finally realizes the energy optimization control of the microgrid tie line.

Description

technical field [0001] The invention belongs to the field of power grid management, and in particular relates to an energy management method for a microgrid. 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 the tie line requir...

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

Images