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Direct-current microgrid coordination and control method including electric automobile charging and discharging management

A charging and discharging management, DC microgrid technology, applied in the field of DC microgrid coordination control, can solve the problems of increasing the number of electric vehicles charged at the same time, the number of electric vehicles being charged less, and the charging speed of electric vehicles being slow, etc. Guarantee the effect of increasing the number of charging and the number of electric vehicles

Active Publication Date: 2017-03-08
YANGZHOU POWER SUPPLY CO OF STATE GRID JIANGSU ELECTRIC POWER CO +4
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of slow charging speed of electric vehicles and the small number of DC microgrids supporting electric vehicle charging. For this purpose, a DC microgrid coordination control method including electric vehicle charging and discharging management is provided, which can realize fast charging and charging of electric vehicles. Increase the number of simultaneous charging of electric vehicles to meet more demand

Method used

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  • Direct-current microgrid coordination and control method including electric automobile charging and discharging management
  • Direct-current microgrid coordination and control method including electric automobile charging and discharging management
  • Direct-current microgrid coordination and control method including electric automobile charging and discharging management

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Embodiment

[0068] Microgrid structure see figure 1 , set the access power P1=1000kw, the initial power of the energy storage system P3=-300kw, the initial remaining capacity of the energy storage system SOC=20%, set SOCmin=20%, SOCmax=90%, the controllable range of the charging pile ( 60kw-120kw).

[0069] 1. Process initialization, enter the first cycle, read the real-time data first, the total power of the distributed power supply P2=100kw, the total power of the load P4=50kw, and there are 5 electric vehicles being charged at the same time.

[0070] 2. Calculate (P1+P2+P3-P4) / N=(1000+100-300-50) / 5=150>120, the energy storage system is charging, and the charging pile is charging at 120kw.

[0071] 3. Assuming that the distributed power supply is affected by the weather, P2=0, the total load power increases by P4=200kw, and the energy storage SOC is charged to 50%. At this time, 60kw(60+120) / 2=90, so the charging pile is charged at 90kw, and the energy storage system is in charging mod...

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Abstract

The invention discloses a direct-current microgrid coordination and control method including electric automobile charging and discharging management. The method comprises steps of: firstly determining features of constitutional units in a direct-current microgrid, wherein the features comprise the power P1 of an access power supply, the total power P2 of a distributed power supply, the power P3 of an energy storage system, the total power P4 of loads, the rest capacity SOC of the energy storage system, the controllable range of the charging power of a charging pile, and the number N of the charged electric automobiles, and determining that the maximum charging capacity of the electric automobiles is P1+P2+P3+P4; and then according to the relation between the (P1+P2+P3+P4) / N, the minimum charging power and the maximum charging power, controlling the charging and discharging of the energy storage system, thereby increasing charging number or speed of an electric automobile charging station. According to the invention, through the energy storage system and the distributed charging, additional charging capacity used for electric automobile charging is increased and the number of rapidly charged electric automobiles is increased.

Description

technical field [0001] The invention relates to a DC micro-grid coordination control method including charging and discharging management of electric vehicles, and belongs to the technical field of micro-grid control. Background technique [0002] Under the dual pressure of energy shortage and environmental pollution, great progress has been made in the research, development and utilization of new energy power generation technologies. Building smart grids, accelerating the development of distributed power generation, and improving the safety, stability, reliability and Power quality is the future development trend. Microgrid technology represents the development trend of distributed energy supply systems in the future and is an important part of the future intelligent power distribution system. It is of great significance to promote energy conservation and emission reduction and achieve sustainable energy development. The National Energy Administration has recently successi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34B60L11/18
CPCB60L53/20H02J7/0068H02J7/34Y02T10/70Y02T10/7072Y02T90/12Y02T90/14Y02T90/16
Inventor 吴敏秀冯鑫振李培培杨波杨川王德顺李强李官军殷俊
Owner YANGZHOU POWER SUPPLY CO OF STATE GRID JIANGSU ELECTRIC POWER CO
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