Peak shaving and valley filling method for grid-connected microgrid including wind-solar-storage-electric vehicles
A technology of electric vehicles, peak shaving and valley filling, applied in the field of grid-connected microgrid operation management, can solve the problems of collaborative management of electric vehicle groups and microgrid energy storage systems, and lack of comprehensive consideration
Active Publication Date: 2021-07-20
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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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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[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] figure 1 Among them, the microgrid of this technical solution is a wind-solar-storage-grid-connected microgrid of distributed renewable energy. The line performs peak shaving and valley filling and power fluctuation suppression. The micro-grid considers the charging characteristics of electric vehicles, and connects electric vehicles to the micro-grid through AC-DC conversion elements.
[0025] For the microgrid described above, the following energy management strategies are implemented:
[0026] The energy management strategy is divided into the peak-shaving and valley-filling phase and the power fluctuation suppression phase. In the peak-shaving and valley-filling stage, based on wind power, photovoltaic and other distributed renewable energy generation forecasting and load forecasting technologies, the slow charging period of electric vehicles will be shift...
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A peak-shaving and valley-filling method for a grid-connected microgrid including wind-solar-storage-electric vehicles belongs to the field of power grid management. It divides the management strategy of the microgrid into two stages: peak shaving and valley filling and power fluctuation suppression; through the slow charging time of electric vehicles in parallel with battery charging and discharging, the peak and valley of the microgrid connection line containing distributed renewable energy are realized. Regulation: Considering the short-term power fluctuations of the tie line caused by the fast charging of electric vehicles, the high-frequency components and low-frequency components in the power fluctuations are respectively stabilized by supercapacitors and batteries. This method can realize the energy optimization and coordination of the grid-connected microgrid including wind-solar-storage-electric vehicles, ensure the power quality of the line, and improve the operating economy of the microgrid.
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 ...
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IPC IPC(8): H02J3/24H02J3/28H02J3/32H02J3/38B60L53/64
CPCB60L53/64H02J3/383H02J3/386H02J3/24H02J3/28H02J3/32Y02E10/56Y02E10/76Y02E70/30Y02T10/70Y02T10/7072Y02T90/12
Inventor 黄震宙侯仲华余捷瞿益斌胡伟周杰周国森忻葆宏蒋永强凌瀛赵琦钱晓军王强邰能灵黄文焘
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO