Power recording for the integration of e-charging stations
The raise in electromobility leads to an increasing need for charging stations outside of the private sector. There is an increasing desire to install charging stations in multi-storey car parks and office car parks. The question often arises whether the existing electrical connection has sufficient power reserves or whether there is a risk of current overload.
Bild von (Joenomias) Menno de Jong auf https://pixabay.com
To make this clear let’s take an example project in which we have performed a power measurement.
Figure 1 shows the electricity consumption of a typical office building (approx. 200 employees) with the usual consumers, operating conditions and canteen operation. The red border line at 200 A corresponds to the protection of the house connection.
Figure 1: Time course of electricity consumption
The clearly recognizable midday peak already leads to the full load on the main fuse. However, it becomes clear that most of the time there is still free capacity in which electric cars can be charged without any problems.
Table 1 gives an overview of typical charging stations and their power consumption.
In our example, a parallel operation of 5 type 2 charging stations with 11 kW charging power would be possible most of the time.
|Type||Loading power||Nominal current|
|Type 2||11 kW / 22 kW / 43 kW||16 A / 32 A / 63 A|
|CCS||50 kW||72 A|
|CHAdeMO||22 kW / 50 kW||32 A / 72 A|
|Supercharger||135 kW||200 A|
Table 1: Overview of typical charging stations
Modern charging systems mostly offer the option of active load management in order to be able to optimally use the free capacities of the house connection.
We analyze and you operate!
It is obvious that a power measurement must be carried out as a basis for planning charging stations.
PQ ENGINEERING has high-quality mobile network analyzers and specially trained staff who can carry out measurements with suitable protective equipment without the need to shut-down the energy supply.
Based on our extensive graphic and written evaluations, installer companies can work out an energy management concept for your system.
In addition, when evaluating your measurement, we assess the local power quality and draw your attention to possible sources of interference in your network.