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Direct current micro-grid coordination control method of light storage electric car charging station

A technology of electric vehicles and DC micro-grids, applied in the field of micro-grids, can solve problems such as the inability to achieve constant DC voltage control, and achieve the effect of stable control

Inactive Publication Date: 2015-10-07
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

However, droop control cannot achieve constant control of the DC voltage, and the microgrid system will inevitably face voltage fluctuations caused by new energy generation fluctuations or load switching, and it is difficult to meet both power and energy requirements

Method used

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  • Direct current micro-grid coordination control method of light storage electric car charging station
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  • Direct current micro-grid coordination control method of light storage electric car charging station

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Embodiment Construction

[0032] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention. All similar structures and similar changes of the present invention should be included in the scope of protection of the present invention. The commas in all indicate the relationship between and.

[0033] Such as figure 1 As shown, a DC micro-grid coordinated control method for a solar-storage electric vehicle charging station provided in an embodiment of the present invention relates to a solar-storage electric vehicle charging station, and the solar-storage electric vehicle charging station is equipped with photovoltaic power generation system, and an EV charge-discharge system for electric vehicle charge-discharge control, is characterized in that: a hybrid energy storage system is configured in the light-storage electric vehicle charging station, and a battery energ...

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Abstract

The invention provides a direct current micro-grid coordination control method of a light storage electric car charging station, and relates to the micro-grid technology field. The technical problem is solved that a direct current bus voltage is kept smooth and stable. The method employs a storage battery and flywheels for hybrid energy storage, a direct voltage is divided into five levels from high to low, layered coordination optimization control of a direct current bus is carried out, and coordination optimization control of photovoltaic power generation, electric car charging and discharging, load power requirements and grid side converter charging and discharging in a charging station direct current micro-grid is carried out. The method can keep balance of the system power in different operation modes of charging station micro-grid island and grid connection and achieves stable control of a direct current bus voltage.

Description

technical field [0001] The invention relates to micro-grid technology, in particular to a technology of a DC micro-grid coordinated control method for an optical-storage electric vehicle charging station. Background technique [0002] In the DC microgrid, the energy balance control can be attributed to the adjustment of the DC bus voltage and the management of the power quality, and the DC voltage is the only indicator reflecting the power balance in the system. In the article "Research on Coordinated DC Voltage Control Strategy of Photovoltaic DC Micro-grid" in the fifth issue of "Modern Electric Power" in 2014, the research object is the DC micro-grid composed of photovoltaic power generation system, energy storage system, and AC-DC load. Based on the operating status of the power grid, a DC voltage coordinated control strategy is proposed. This strategy realizes the coordinated control among converters according to the hierarchical drooping changes of the DC bus voltage. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/16H02J7/35
CPCY02E10/56
Inventor 程启明陈根褚思远杨小龙徐冠雄刘懿稼
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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