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A micro-grid energy optimization management method considering electric vehicle charge and discharge

An energy optimization and management method technology, applied in the field of smart grid, can solve problems such as damage to battery life, battery overcharge or overdischarge, and less consideration of energy management response capabilities, so as to reduce system operating costs, facilitate system calls, and avoid The effect of overcharge and overdischarge

Active Publication Date: 2019-01-15
南京鼎竹电力设备工程有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research has seldom considered the change of the number of EVs that can be deployed during the management process and its response to energy management, resulting in a reduction in the accuracy and operability of scheduling results.
At the same time, the response power of the EV group determined by the scheduling is not allocated according to the energy state of each EV itself, which may cause some EV batteries to be overcharged or overdischarged, which will not only affect the normal use of users, but may also damage battery life

Method used

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  • A micro-grid energy optimization management method considering electric vehicle charge and discharge
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  • A micro-grid energy optimization management method considering electric vehicle charge and discharge

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Embodiment

[0063] In order to verify the effectiveness of the method of the present invention, the following simulation experiments are carried out.

[0064] Step 1. There are 100 electric vehicles in the calculation example, the charging and discharging power is completely controllable, and the rated power is 3kW. The statistical data of average daily mileage of EVs that have been mastered are as follows: image 3 As shown, assuming charging once a day, the initial SOC of the EV arriving at the microgrid and 00:00 (the start point of the simulation cycle) all obey the normal distribution N(0.6,0.3). Combined with statistical data, the probability of EV suspension in a typical daily microgrid is shown in Table 1. Assuming that 70% of the EV is in the charging state during the stop process, the number of EVs at each time is obtained; the SOC of the EV is extracted by the Monte Carlo method to obtain the SOC distribution in the microgrid.

[0065] Table 1 Probability of EV stoppage in mi...

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Abstract

The invention discloses a micro-grid energy optimization management method considering electric vehicle charge and discharge, Considering the energy management strategy of photovoltaic output, electric vehicle charging and discharging power, electricity price time division and energy storage state, an energy management model is established, which takes electric vehicle charging and discharging power as the optimization variable and aims at reducing the operating cost of micro-grid. The micro-grid energy optimization management method considers the change of the quantity of the transferable electric vehicles and carries out the response power distribution according to the energy state of each electric vehicle, avoids the overcharge or overdischarge of the batteries of some electric vehicles, and improves the local consumption level of the renewable energy and reduces the system operation cost.

Description

technical field [0001] The invention belongs to the field of smart grids, in particular to a micro-grid energy optimization management method considering charging and discharging of electric vehicles. Background technique [0002] In recent years, with the advancement of new energy technologies, photovoltaic power generation has been widely used, but its intermittent and limited predictability make it a major challenge for smart grids to effectively combine distributed power sources such as photovoltaics with the grid. one. With the development of energy storage technology, it can effectively solve the problem of grid connection of renewable energy. However, the price of energy storage is still high. In order to reduce the investment in fixed energy storage, electric vehicles (electric vehicles, EV), which have developed rapidly in recent years, can be used as mobile energy storage. EV can provide a more economical, safe and stable operation regulation service for the grid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/32B60L55/00H02J3/38
CPCH02J3/383H02J3/00H02J3/008H02J3/32H02J2203/20Y02E10/56Y02E70/30
Inventor 张瑶张俊芳孙佳兴戚向阳邱蕴锋
Owner 南京鼎竹电力设备工程有限公司
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