If the network is overloaded, our specially developed software offers load shedding with controlled load reduction and the option to pause the charging process. This protects the charging infrastructure and makes sure that the car remains responsive to load management systems.
Energy suppliers require the ability to shut down electrical appliances like boilers by remote control if the grid becomes overloaded. This is now also proposed for charging stations.
Switch-off pulses are sent to the load consumers via a traditional ripple control signal, causing the power supply to be disconnected abruptly by a relay contact. This works fine with something like a heating element in a boiler.
However, abruptly disconnecting the power when charging at full load can lead to sparks, causing relays and conductor contacts to smoke and causing long-term damage to the vehicle and infrastructure in the process.
It receives the input or output signal from the ripple control receiver.
It closes down the charging process in a protected and controlled manner within a few seconds and only then does it disconnect the vehicle from the mains supply.
It then switches the vehicle to a paused status so that it can be woken up again and charging can continue when the power comes back on.
It keeps on communicating with the ripple control receiver and with load management systems.
In other words, it provides reliable protection against irreparable damage to the switch contacts.
It saves on additional installation costs as energy suppliers throughout Europe are already calling for this functionality, or will be doing in the very near future.
Why do we need load shedding?
1. Power supply:
Power needs to be generated at the time consumers need to use it. In other words, there needs to be a permanent balance between generation and consumption.
2. Differences in the grid:
A grid frequency of 50 Hz is used across Europe. Frequency fluctuations come about whenever the number of AC vibrations changes.
3. Load shedding as a last resort:
Underfrequency comes about if more power is consumed then is generated. To avoid the grid collapsing under the pressure, power to individual consumers is switched off on a random basis. To do this, energy suppliers need emergency access to e-car charging stations.