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

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: 2018-02-23
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

Method used

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

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] figure 1 Among them, the micro-grid of this technical solution is a wind-solar-storage-grid-connected micro-grid of distributed renewable energy. The tie line performs peak shaving and valley filling and power fluctuation suppression. The microgrid considers the charging characteristics of electric vehicles and connects electric vehicles to the microgrid through AC-DC conversion elements.

[0022] For the microgrid described above, the following energy management strategies are implemented:

[0023] 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 sh...

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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 ...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/28H02J3/32H02J3/38B60L11/18
CPCB60L53/64H02J3/383H02J3/386H02J3/24H02J3/28H02J3/32Y02E10/56Y02E10/76Y02E70/30Y02T10/70Y02T10/7072Y02T90/12
Inventor 黄震宙侯仲华俞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
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