Optimal power flow node electrovalence calculation method considering electric vehicle power controllable domain

An electric vehicle, optimal current technology, applied in the direction of AC network with the same frequency from different sources, circuit devices, climate sustainability, etc., can solve the problem without further analysis of the slackness of charging and discharging urgency, without giving a clear Indicators distinguish the order of charging and discharging, etc.

Inactive Publication Date: 2017-08-29
CHONGQING UNIV
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Problems solved by technology

[0003] The above method mainly guides the charging and discharging of electric vehicles through electricity prices, aiming to meet the needs of power grid shaving and valley filling and user economy. It rarely considers the urgency of charging and discharging of electric vehicles and equivalent energy storage, and does not give clear indicators to distinguish between charging and discharging. Sequence; further analysis, some literature considers the urgency of charging, but does not further analyze the slackness of charging and discharging urgency, that is, there is a time interval for charging and discharging. There is an upper and lower limit on the discharge power

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  • Optimal power flow node electrovalence calculation method considering electric vehicle power controllable domain
  • Optimal power flow node electrovalence calculation method considering electric vehicle power controllable domain
  • Optimal power flow node electrovalence calculation method considering electric vehicle power controllable domain

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Embodiment Construction

[0089] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0090] 1EV Load Time-Space Distribution Probability and Simulation Sampling Method

[0091] 1.1 EV time distribution probability

[0092] Considering the similarity of EV (electric vehicle) and fuel vehicle travel habits, combined with the US Department of Transportation’s 2009 survey of 47,641 small vehicles in the United States (National Household Travel Survey, NHTS), 96% of them are private passenger cars It is in the state of daily stop, has more adjustable time, and has high flexibility. Therefore, this paper takes private passenger cars as the research object for analysis. The maximum likelihood estimation method is used to estimate the EV travel parameters, and the EV daily driving distance conforms to the lognormal distribution; the initial charge and discharge time conforms to the piecewise normal distribution.

[0093] The prob...

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Abstract

The invention relates to an optimal power flow node electrovalence calculation method considering an electric vehicle power controllable domain, and belongs to the field of an intelligent power grid. According to the method, an electric vehicle load space-time distribution simulated sampling method is built by considering an effect of mobile energy storage of an electric vehicle, charging urgency and discharging abundance indexes are built, the controllable ability of the electric vehicle is quantized and is sequenced, an upper limit and a lower limit of a space-time sequence power adjustable domain of each node are determined, a node electrovalence optimal power flow model considering space characteristics is further built, and the optimal space node electrovalence is obtained by solution. An electric vehicle user is guided to change a charge-discharge habit by real-time electrovalence, and the running cost is reduced.

Description

technical field [0001] The invention belongs to the field of smart grids, and relates to a method for calculating an optimal power flow node electricity price in consideration of an electric vehicle power adjustable domain. Background technique [0002] At present, there are many research results on the charging and discharging of electric vehicles at home and abroad. For example, LuoX has established the charging urgency index of a single electric vehicle, and further analyzed the automatic response strategy of the charging and discharging power of electric vehicles under the condition of virtual public electricity price to realize frequency modulation. and calm the power fluctuations caused by wind power access to the grid; FlathCM et al. pointed out that real-time electricity prices in time, node electricity prices in space, and regional electricity prices can play a good role in guiding electric vehicles to achieve voltage balance, peak shaving and valley filling, etc. P...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/06
CPCH02J3/06H02J3/32H02J2203/20H02J2310/64Y02B70/3225Y04S20/222
Inventor 李春燕张谦付志红张淮清王东张鹏
Owner CHONGQING UNIV
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