A V2G-oriented bidirectional electric energy metering method for electric vehicles
A technology for electric vehicles and electric energy measurement, which is applied in the direction of measuring electric variables, measuring devices, instruments, etc.
Active Publication Date: 2021-08-03
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] like 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 E, ...
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The invention provides a V2G-oriented bidirectional electric energy measurement method for electric vehicles, which belongs to the field of electric energy measurement for electric vehicles. The method includes: establishing a two-way interaction model of 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 E, it is connected in parallel to the two ends of the bidirectional inverter of the electric vehicle, Z and Z l1 After being connected in series, it is connected in parallel at both ends of the grid voltage; according to the established two-way interactive model, the electric energy measured during charging and the electric energy measured during discharging are determined for the electric vehicle under the distorted signal. By adopting the invention, the bidirectional electric energy metering when the electric vehicle is charged and discharged under the distorted signal 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