Dynamic load management

At a charging station, the power resources are limited. Especially in cities, the demand for electricity for electric cars is very high at certain times of the day. When setting up more than one charging station, one thing quickly becomes clear: The required connected load increases with each additional charging point. If this energy demand were always covered 100%, then in the worst case scenario, additional cars could not be charged immediately. Intelligent control of resources and energy flows is therefore a basis for efficient and economical operation of charging infrastructures.

The use of load management for the cars to be charged is the solution here.

Limited connected load

Charging parks for electric cars can absorb a large amount of energy within a short time. Planners, installers and operators of charging infrastructures have to face a wide variety of challenges with regard to the energy supply at a location, because electric cars are not the only consumers of energy. Often, no additional power connection is provided or available either structurally or by the grid operator. In most cases, the existing connection capacity should be used and not expanded for cost reasons. Furthermore, it is often not known how much power is still available at your existing house connection.

In order to optimally distribute the required energy, so-called load management comes into play, because modern charging stations offer the possibility of optimally utilising existing resources.

The term load management refers to the control of electricity demand through the targeted switching on or off of electricity consumers or the adjustment of the required electricity consumption. 

Load management

Load management measures are applied in both the energy sector and the mobility sector. Load management allows the available energy from the mains connection to be distributed to all connected charging points.

The goal of load management is therefore to develop an intelligent power grid. To implement this, the existing infrastructure is equipped with control technologies. 

Dynamic load management

  • Amount of energy is variable and depends, for example, on the energy demand of the site
  • The charging station control communicates with the site's energy meter
  • When the power consumption of the site is low, more energy is available for charging
  • Through dedicated control of the energy, multiple charging points can be installed
  • The connected load is not exceeded and no peak loads are generated

Static load management

  • Uncomplicated form of load management
  • Inflexible control of loads
  • A fixed amount of power is provided
  • There is a fixed power per charging point
  • Additional free power is not used for charging

Future-proof - what does that mean?

Some operators do not know today how many charging stations they want to operate at their location in the next 2-5 years. Therefore, we name the top 5 requirements that ensure that the charging park can be flexibly expanded:

  1. When retrofitting, the sub-distribution should ideally no longer be touched
  2. New charging points must be able to be integrated into the existing infrastructure
  3. The charging park should be configurable across charging station manufacturers
  4. The charging park should be expandable by individual DC chargers (up to 50kW)
  5. If, for example, in one or two years' time the grid operator demands grid-serving control of the charging infrastructure, it should already be pre-equipped for this and demonstrably provide this function by means of updates

 

Bender charge controller with dynamic load management

The CC613 is the next generation of intelligent charge controllers. Like its predecessor CC612, the CC613 is the brain of an intelligent charging station: it communicates with the vehicle and the backend, it monitors the internal hardware of the charging system, the user interfaces and the connection from the charging station to the vehicle.

Learn more

Application examples

Charging points in Cologne that comply with calibration regulations

Cologne's Stadthotel am Römerturm installs first calibration-compliant version of ebee charging points

Solar filling station Euskirchen

A parking deck on two levels, which simultaneously functions as a large solar filling station with 32 fuel pumps for electric cars, was built at the end of 2017 in the city centre of Euskirchen.

Future proof charging station

Bender offers with the new generation Charge Controller CC613 the basis for an AC charging station or wallbox

What and How questions

The term load management refers to the active control of electricity consumption. The aim of load management is not to exceed the available grid connection capacity and to optimally distribute the available power among all consumers.

 

 

Without load management, peak loads can occur that exceed the grid connection capacity agreed with the energy supplier.

 

 

Load management enables simultaneous, parallel charging. The available charging power is distributed to the individual cars being charged.

 

 

Always! With a limited house connection, I always make the best use of the rest and then expand as required.

Our immediately available webinars on electromobility at a glance: