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Load balancing electric automobile low voltage charging network system

A technology for electric vehicles and low-voltage charging, applied in the field of power electronics, can solve problems such as the influence of distribution network operation, and achieve the effect of local consumption

Active Publication Date: 2016-11-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to solve the impact of electric vehicles connected to the traditional AC grid on the operation of the distribution network, and propose a low-voltage charging network system for electric vehicles that uses low-voltage DC interconnection lines to achieve load balance in low-voltage distribution stations

Method used

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  • Load balancing electric automobile low voltage charging network system
  • Load balancing electric automobile low voltage charging network system
  • Load balancing electric automobile low voltage charging network system

Examples

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Embodiment 1

[0016] Such as figure 2 As shown, this embodiment is a 4-terminal electric vehicle low-voltage charging network system, which consists of four major parts: AC distribution station area (4 in total), low-voltage distribution station area (4 in total), DC distribution line and control system .

[0017] The AC distribution station area mainly includes 10kV / 380V distribution transformers, which are responsible for reducing the AC 10kV (AC high voltage) of the AC system to AC 380V (AC low voltage).

[0018] The low-voltage distribution station area is the power distribution converter station, which mainly includes the front-stage AC / DC converter and the back-stage DC / DC converter connected to the front-stage AC / DC converter. The front-stage AC / DC converter control network side current and DC bus voltage, and the subsequent DC / DC converter controls the DC side charge and discharge voltage or current. Part of the AC 380V (AC low voltage) output by each 10kV / 380V distribution trans...

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Abstract

The invention discloses a load balancing electric automobile low voltage charging network system, and belongs to the technical field of power electronics. According to the invention, the system realizes the low voltage distribution area load balancing by utilizing a low voltage direct current interconnection line, the load is balanced according to distribution transformer capacity, so that the load rate is reduced. The system can realize the on-site elimination of distributed mains power in the low voltage distribution area.

Description

technical field [0001] The invention belongs to the field of power electronics, and in particular relates to a low-voltage charging network system for electric vehicles. Background technique [0002] As energy issues become increasingly prominent, reducing dependence on fossil fuels and reducing carbon dioxide emissions have become hot issues worldwide. The development of electric vehicles is an important means to improve the energy structure, ensure energy security and develop a low-carbon economy, and electric vehicles will play a major role in the future. Electric vehicles are a kind of random load, and their charging power requirements are affected by the driving habits of users and the characteristics of electric vehicle batteries. A large number of electric vehicles connected to residents' homes, offices and other areas will significantly affect the local load distribution, and may Centralized charging during the peak load time of the day will further increase the loa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H02J3/06
CPCH02J3/06H02J7/02
Inventor 骆健俞拙非武迪温传新董长城黄绍真
Owner STATE GRID CORP OF CHINA
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