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Direct-current slow-charging pile suitable for large scale parking lot and robust controller designing method

A parking lot and controller technology, applied in the field of DC slow charging pile and robust controller design, can solve the problems of increasing the volume and weight of the converter, and achieve the effects of simple structure and control, reduced design capacity, and continuous output current

Active Publication Date: 2017-07-21
NANTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existence of high-frequency transformers limits the further improvement of system efficiency and increases the volume and weight of the converter

Method used

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  • Direct-current slow-charging pile suitable for large scale parking lot and robust controller designing method
  • Direct-current slow-charging pile suitable for large scale parking lot and robust controller designing method
  • Direct-current slow-charging pile suitable for large scale parking lot and robust controller designing method

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Embodiment Construction

[0054] Below in conjunction with specific embodiment and accompanying drawing, technical scheme of the present invention is described in further detail:

[0055] The present invention proposes a new type of DC slow charging pile system architecture for large parking lots, such as figure 1 shown. In the figure, a medium-capacity three-phase power frequency transformer is installed on the AC incoming line side of the power distribution room in the parking lot for total electrical isolation to improve personal safety; an APF is connected in parallel on the outgoing line side of the three-phase power frequency transformer for total current Harmonic compensation; DC slow charging pile is divided into two parts: three-phase uncontrolled rectifier bridge and multi-module parallel step-down non-isolated charging interface converter, which has the advantages of simple structure and control, high efficiency and low cost. Compared with the traditional Buck converter, the Superbuck conve...

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Abstract

The invention discloses a direct-current slow-charging pile suitable for large scale parking lot and a robust controller designing method. A three-phase industrial frequency transformer is installed on an alternating current wire inlet side in a parking lot power distribution room to carry out overall electrical isolation. An active power filter (APF) is parallelly connected to the wire outlet side of the three-phase industrial frequency transformer. Multiple direct-current slow-charging pile modules are parallelly connected to the wire outlet side of the three-phase industrial frequency transformer. Each direct-current slow-charging pile module comprises a three-phase uncontrolled rectification bridge of a preceding-stage filtering-free capacitor and a rear-stage Superbuck charging port converter. The direct-current slow-charging pile is advantaged by high reliability and efficiency, simple in structure and control and quite low in cost. The input voltage is six frequency doubling direct-current filtering waves, so the zero point of the right half plane of the charging port converter is continuously changed along with the working voltage. The output side comprises quite big low-frequency ripple (LFR) components.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle charging, and in particular relates to a DC slow charging pile and a robust controller design method suitable for large parking lots. Background technique [0002] Charging infrastructure construction is an important factor affecting the effectiveness of electric vehicle promotion. Studies have shown that the construction of slow-charging piles in the parking lot can meet the daily driving needs of most electric private cars in my country through slow-charging charging. Compared with AC slow-charging piles, DC slow-charging piles also have the advantages of small size, which is conducive to group construction, and can realize energy supply to power batteries without the cooperation of on-board chargers, and the charging power selection is more flexible. Therefore, DC slow charging piles for large parking lots are expected to develop into an important type of charging facilities in my cou...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/04B60L11/18
CPCB60L53/31H02J7/0018H02J7/045Y02T10/70Y02T10/7072Y02T10/72Y02T90/12
Inventor 秦岭冯志强孔笑笑王亚芳胡茂候虚虚罗松
Owner NANTONG UNIVERSITY
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