AC charging pile system based on td-lte network

Abstract

The invention provides an alternating current charging pile system on the basis of a TD-LTE (time division long term evolution) network. Application of the TE-LTE network is combined. A charging pile substation serves as a site management center of alternating current charging piles, an analysis result on fault diagnosis of the site charging piles is provided via an embedded WEB server, aerial update service is provided for site charging pile firmware, load for an alternating current charging pile group is controlled and scheduled, remote fault diagnosing and monitoring and program updating service are realized, maintaining efficiency is improved, orderly charging is guaranteed by load controlling and scheduling, normal power supplying is reduced, charging quality for users is guaranteed, and stability of a power grid is maintained.

Description

technical field [0001] The invention relates to the field of new energy electric vehicle charging, in particular to an AC charging pile system based on a TD-LTE network. Background technique [0002] With the deepening of the global energy crisis, the depletion of oil resources and the increasing harm of air pollution and global temperature rise, governments and automobile companies generally recognize that energy saving and emission reduction are the direction of future automobile technology development, and the development of electric vehicles will be The best way to solve these two problems. my country attaches great importance to the development of electric vehicles, and the country has issued a series of standards to support and regulate the development of electric vehicles. In the draft "Energy Conservation and New Energy Vehicle Industry Planning", it is pointed out that pure electric vehicles will be the main strategic orientation. Relevant experts pointed out that...

AI Technical Summary

Problems solved by technology

Relevant experts pointed out that there are three major bottlenecks in the development of pure electric vehicles: one is the lack of standards, the other is the imperfection of supporting policies, and the third is the orderly advancement of infrastructure planning and construction

China Southern Power Grid began to implement the pilot electric vehicle charging project in 2009. In 2010, it began to conduct batch bidding for AC charging piles and install them in some communities and public places. Many manufacturers cut into the design and production of charging piles from traditional industries, resulting in the decline of AC charging piles The phenomenon of shoddy manufacturing is common, and these designs do not have a comprehensive system design. In some applications, the AC charging pile is only used as a public socket; for the faulty AC charging pile, the maintenance department makes subjective judgments based on the fault phenomenon and decides to repair or replace it. Due to lack of experience, often a simple problem can only be solved by going back and forth to the site several times, and there is basically no set of equipment self-diagnosis measures and methods; often when the pile body in use fails, the user reports to the power supply department. get dealt with

In addition, the setting of the fixed value of AC charging piles is basically a fixed program at present, and it is impossible to dynamically adjust the peak, flat and valley electricity prices of AC charging piles.

At present, the communication between the AC charging pile and the monitoring center uses a GSM / GPRS wireless module in each pile, which is affected by bandwidth and signal strength, and each pile is equipped with a GPRS module, which increases the cost of networking, and the regional The internal channel is blocked; even some AC charging piles are not equipped with GPRS modules, which leads to the "anarchy" of AC charging pile groups in some communities or public places. The power supply department needs a large-scale and long-distance on-site inspection to understand the scene Whether the state of the charging pile is normal, so that the operating cost remains high

[0004] At the same time, in the current AC charging pile technical scheme, in the initial stage of AC charging pile construction, due to the instability of the program or the addition of new functions, it is necessary to upgrade the firmware program of the AC charging pile, and it takes a lot of time to go to the site. Disassembly and upgrade, in some installation occasions, it is very difficult to upgrade the program due to the inconvenience of opening the case

[0005] In addition, as the construction planning of electric vehicle charging facilities is included in the grid construction and urban construction planning, the current grid is often in a full-load state, and large-scale electric vehicles are randomly charged, which will generate a large amount of load; and the AC-DC power conversion will be completed during the charging process. , due to the lack of proper control and scheduling measures, these will have a great impact on the power grid, and affect the normal power supply and user charging quality

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