V2G-oriented electric vehicle bidirectional electric energy metering method
A technology for electric vehicles and electric energy metering, which is applied in the direction of measuring electric variables, measuring devices, complex mathematical operations, etc., and can solve problems such as the inability to realize charging and discharging two-way electric energy metering
Active Publication Date: 2021-01-22
UNIV OF SCI & TECH BEIJING
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[0041] In the prior art, the charging model and discharging model of electric vehicles in the power grid are established, and the electric energy metering formulas during charging or discharging are proposed. However, these electric energy metering methods have limitations and are only suitable for The case of charging or only discharging
At present, there is no two-way interactive model for electric vehicle electric energy metering, and it is impossible to realize charging and discharging two-way electric energy metering
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[0104] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0105] Such as figure 2 and image 3 As shown, the embodiment of the present invention provides a V2G-oriented electric vehicle bidirectional electric energy metering method, the method comprising:
[0106] S101, establish a two-way interaction model for electric vehicles connected to the grid; wherein, the two-way interaction model includes: grid voltage u(t), grid line load Z l1 ,Z l2 ,Z l3 , other loads in the power grid Z, electric vehicle bidirectional inverter, electric vehicle battery electromotive force E and electric vehicle internal load Z ev ; The grid voltage is connected in series Z l2 ,Z l3 After that, it is connected to the bidirectional inverter of the electric vehicle, Z ev After being connected in series with ...
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The invention provides a V2G-oriented electric vehicle bidirectional electric energy metering method, and belongs to the field of electric vehicle electric energy metering. The method comprises the following steps: establishing a bidirectional interaction model of an electric vehicle connected to a power grid, wherein the bidirectional interaction model comprises power grid voltage u(t), power grid line loads Zl1, Zl2 and Zl3, other loads Z in the power grid, an electric vehicle bidirectional inverter, an electric vehicle battery electromotive force E and an electric vehicle internal load Zev,the power grid voltage is sequentially connected with the Zl2 and the Zl3 in series and then connected into the electric vehicle bidirectional inverter, the Zev and the E are connected to the two ends of the electric vehicle bidirectional inverter in parallel after being connected in series, and the Z and the Zl1 are connected to the two ends of the power grid voltage in parallel after being connected in series; and determining the electric energy metered during charging and the electric energy metered during discharging of the electric vehicle under the distortion signal according to the established bidirectional interaction model. According to the invention, bidirectional electric energy metering of the electric vehicle during charging and discharging under distortion signals can be realized.
Description
technical field [0001] The invention relates to the field of electric energy metering for electric vehicles, in particular to a V2G-oriented two-way electric energy metering method for electric vehicles. Background technique [0002] The environmental and resource problems caused by traditional fuel vehicles have become increasingly prominent. Countries have successively introduced strict measures to restrict fuel vehicles. New energy vehicles have played a role in alleviating the pressure of oil shortages, reducing vehicle exhaust emissions, promoting the transformation and upgrading of the automobile manufacturing industry, and sustainable development of the transportation industry. play an important role. However, the connection of large-scale electric vehicles to the power grid has also brought great challenges to the operation of the power grid. [0003] Vehicle to Grid (V2G) describes a system in which electric vehicles are connected to the grid for bidirectional char...
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IPC IPC(8): G01R22/00G06F17/10
CPCG01R22/00G06F17/10
Inventor 崔家瑞张宁宁杨旭张帅李擎王嘉玮阎群周静怡
Owner UNIV OF SCI & TECH BEIJING