A three-phase pwm rectification new energy vehicle charging method based on model prediction

Abstract

The invention provides a three-phase PWM rectification new energy vehicle charging method based on model prediction, and relates to the technical field of power electronic power conversion. The present invention aims at users' different charging requirements for new energy vehicles, including fast charging, charging economy, and damage to rechargeable batteries. The optimal voltage curve is set by selecting the optimal index through a multi-objective algorithm. At the same time, the vehicle lithium battery and new energy The battery is charged, and the two batteries are monitored in real time to ensure the charging safety of the battery and meet the special charging needs of users. The obtained optimal voltage value is set as the reference value of the DC side, and according to the real-time feedback adjustment of the battery capacity, the optimal voltage value is controlled by the outer loop sliding mode to obtain the rated active power value of the system. In order to reduce the loss caused by the number of switching changes on the grid side, the switching coefficient table is designed according to the rated active power value to reduce the amount of calculation and improve the response speed. At the same time, it reduces the frequent changes of the switch and prolongs the life of the equipment.

Description

technical field [0001] The invention relates to the technical field of electric energy conversion of power electronics, in particular to a three-phase PWM rectification new energy vehicle charging method based on model prediction. Background technique [0002] The automobile industry is a pillar industry of the national economy. It is closely related to people's life and has become an indispensable part of modern society. However, the traditional automobile industry, which uses oil as fuel, not only provides people with fast and comfortable means of transportation, but also increases the dependence of the national economy on fossil energy and deepens the contradiction between energy production and consumption. With the continuous increase of the dual pressure of resources and environment, the development of new energy vehicles has become the direction of the future development of the automobile industry. New energy vehicles refer to the use of unconventional vehicle fuels a...

AI Technical Summary

Problems solved by technology

[0003] At present, new energy vehicles are mainly charged and discharged by vehicle lithium batteries. The charging capacity of new energy batteries (such as photovoltaic batteries) is zero. New energy batteries are often in a state of low energy when they are working, which is a kind of damage to the battery itself. At the same time, it also reduces the battery life of the car in disguise.

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