Automatic voltage stabilization charging pile based on pre-balance system

Abstract

The invention relates to the technical field of an electric vehicle charging device and discloses an automatic voltage stabilization charging pile based on a pre-balance system. The charging pile is characterized in that a structure of the charging pile is a three-in two-out type, an input end of the charging pile is connected with two phase lines and an N line of a three-phase alternating currentpower supply, an output end of the charging pile is connected with a phase line and an N line of an electric vehicle single-phase line, and the automatic voltage-stabilizing charging pile of the pre-balance system comprises three sampling modules, an intelligent control module, a driving module, a dual-power module and an Internet-of-of-things module. The charging pile is advantaged in that according to random changes of parking and charging of a charging automobile, tracking adjustment is performed through system analysis, a charging power supply is switched, a charging circuit with a current sampling value smaller than a preset value is adjusted to be located on an optimal phase power supply to wait for charging, and automobile charging data are sent to a cloud database through an Internet of Things module to be stored.

Description

technical field [0001] The invention relates to the technical field of electric vehicle charging devices. Background technique [0002] With the overall improvement of people's living standards in our country, all kinds of new energy vehicles emerge in an endless stream, especially electric vehicles that use electric energy will fully replace the sales of traditional energy vehicles in 2025, but the widespread use of rechargeable vehicles has caused a series of problems. [0003] 1. The single-phase power supply voltage in residential places (including charging car parking lots) is unstable. Electric vehicles need to use charging piles to charge. In order to meet the requirements of daily life, the charging piles need to be installed in the parking lot of the residential area, and use the same transformer as the buildings in the residential area. The continuous connection of the low-voltage power supply system has already caused the three-phase load of the low-voltage power...

AI Technical Summary

Problems solved by technology

Electric vehicles need to use charging piles to charge. In order to meet the requirements of daily life, the charging piles need to be installed in the parking lot of the residential area, and use the same transformer as the buildings in the residential area. The continuous access of the low-voltage power supply system has already caused the three-phase load of the low-voltage power supply system to be seriously unbalanced, and local overload phenomena occur from time to time. The intervention of high-power electric vehicles will definitely make the already unstable low-voltage line system worse, making the three-phase line The voltage is becoming more and more asymmetrical, which not only affects the power supply capacity and power supply quality of the power supply system, but also increases the power system accidents and failures caused by it

[0004] 2. The charging power supply voltage of the special charging car parking lot is unstable

At present, this function is in the basic construction stage, and there are still many deficiencies that need to be improved in recent years

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