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Charging station for charging electric vehicles

A charging station and electric vehicle technology, applied in the field of charging stations, can solve problems affecting the symmetry of the three-phase supply system and the symmetry of the power supply network

Pending Publication Date: 2021-10-22
WOBBEN PROPERTIES GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Such an arrangement can additionally influence the symmetry of the three-phase supply system in the charging station and thus the symmetry of the supply network to which the charging station is connected.

Method used

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  • Charging station for charging electric vehicles
  • Charging station for charging electric vehicles
  • Charging station for charging electric vehicles

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0109] Example 1: Charging process (total current) at phase A with 1 per unit DC (symmetrical AC load) and 0.33 per unit AC:

[0110]

[0111] This leads to the asymmetry:

[0112]

[0113] Feeding an additional negative phase-sequence system current through a DC charger:

[0114]

[0115] Total current after compensating the total system:

[0116]

[0117] This leads to the asymmetry:

[0118]

[0119] Thus, a 50% asymmetry in example 1 is achieved by feeding negative phase sequence system currents, for example by figure 1 Embodiments of the active rectifier 16 drop to 25%.

example 2

[0120] Example 2: Charging process (total current) with 1 per unit DC (symmetrical AC load) and 4 x 0.33 per unit AC at phase A:

[0121]

[0122] This leads to the asymmetry:

[0123]

[0124] The AC charging point turns 240° four times and the AC charging point 3 turns 120° in phase:

[0125]

[0126] This leads to the asymmetry:

[0127]

[0128] Total current after compensating negative phase sequence system:

[0129]

[0130] This leads to the asymmetry:

[0131]

[0132] In the second example there is at the beginning a still greater overall asymmetry of 114%. The asymmetry can correspond to figure 2 The first step of step S1 is reduced to 28% by transforming some phase assignments. For this, in can correspond to the rightmost in figure 1 A phase rotation of 240° is performed at the fourth AC charging terminal 6 shown in FIG. Therefore the connection line is transferred in two counts, about figure 1 That is, the first connection line 31 is conn...

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PUM

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Abstract

The invention relates to a charging station (1) for charging electric vehicles (24), comprising a plurality of AC charging terminals (6), each for charging an electric vehicle (24) by means of alternating current, wherein each of the AC charging terminals (6) is connected to a three-phase current supply (12) via a phase-change device (18) in order to be supplied thereby with three-phase electrical current, wherein the current supply (12) has three supply lines (21, 22, 23) for providing three voltage phases, and each AC charging terminal (6) has three connection lines (31, 32, 33) for connecting to the three supply lines (21, 22, 23) for applying the three voltage phases to the connection lines (31, 32, 33), wherein each phase-change device (18) is configured to change a connection allocation between the three supply lines (21, 22, 23) and the three connection lines (31, 32, 33).

Description

technical field [0001] The invention relates to a charging station for charging an electric vehicle and also to a method for charging an electric vehicle. Background technique [0002] Electric vehicles are becoming more and more popular, so that more and more and larger charging stations are required, which charge the electric vehicles. A large charging station, which can also be called an electric gas station, can simultaneously charge a plurality of electric vehicles with electric current. Such charging stations usually obtain the power required for this from an electrical supply network, to which they can be connected via a grid connection point. Especially in the case of large charging stations, the power requirement here can have a significant influence on the supply network. In this case, grid sections or grid connection points sometimes reach power limits. [0003] In order to solve this problem, the power supply grid and / or the grid connection point are construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/60H02J3/26
CPCB60L53/60H02J3/26B60L53/67B60L53/63B60L53/14B60L53/11Y02E60/00Y02T10/7072Y02T10/70Y02T90/12
Inventor 约翰内斯·布龙巴赫克里斯蒂安·施特拉菲尔阿尔弗雷德·贝克曼
Owner WOBBEN PROPERTIES GMBH