- The launch of electromobility requires an intelligent integration of the loading infrastructure into power grids.
- Strong need for standardisation between charging infrastructure, electric vehicles and power grid.
- Two levels of intelligent load management: output management to protect against grid overload and energy management to optimise delivery and tariffs.
- WG 6 of the NPM presents a roadmap to give an overview of standardisation issues in the context of intelligent load management.
“The increasing number of charging processes as a result of the launch of electromobility will become more and more noticeable in the power grid. These predictable, isolated surges in electricity demand at specific times during the day need to be balanced. This requires the charging infrastructure to be able to communicate in all directions with vehicles and the power grid, and it needs to be managed intelligently. This is where all stakeholders need to have a common understanding about the necessary interfaces in order to implement intelligent load management on a nationwide scale. For the first time, our roadmap provides a forward-looking overview of how and where standardisation can play its part in enabling electromobility and the power grid to work together seamlessly,” explains Roland Bent, President of the German Commission for Electrical, Electronic & Information Technologies of DIN and VDE and chair of NPM’s WG 6.
Interfaces examined by the roadmap:
Output and energy management in charging stations, vehicles and energy providers
The challenge is not so much the overall amount of energy needed, but the simultaneously required output at any one connection point, in the local grid or substation. That is why the demand for electricity needs to be distributed intelligently and, if necessary, adapted to grid conditions in a flexible way. In order to guarantee this, more and more intelligent output and energy management systems are being installed locally behind grid connection points. It is vital to define a standardised interface for connected consumers and energy suppliers which includes the charging infrastructure for electric vehicles.
Communication between charging station and charging service provider (CSO)
An improved and customer-friendly implementation of load management requires a standardised exchange of information between the charging station and the CSO in order for information to be passed from the charging point to the CSO, notably during the charging process. Individual solutions are to be avoided, and standardised interfaces that enable standardised communication between charging stations and CSO are to be developed.
Management by energy providers
In order for the output to be adapted to grid conditions via a local output and energy management system and in order to intervene locally and promptly, if necessary, grid operators need an interface at the grid connection point which enables an exchange of relevant information between the grid and the customer installation.
Preparation for charging process
In order to perform load management in the most economical, efficient and customer-friendly way possible, it is helpful to exchange information on the charging process before the vehicle arrives at the charging point. Various interfaces are necessary to develop an integrated and interoperable system in order to enable easy and convenient charging of electric vehicles.
Interface between CSO and electromobility service provider (EMSP)
An interface between CSO and EMSP enables the exchange of information from the charging point via the CSO and EMSP to the customer, particularly during the charging process. The exchange of data can take place via a roaming platform (“(Contract) Clearing House“), which functions as intermediary between several EMSPs and CSOs.
The Roadmap Intelligent Load Management is now available to download on the NPM website www.plattform-zukunft-mobilitaet.de (in German).
About NPM – National Platform Future of Mobility
The National Platform Future of Mobility brings together experts in the fields of politics, the private sector, associations, research institutes and NGOs to develop visions for sustainable, environment- and climate-friendly, affordable and competitive mobility in Germany. Presided by Prof. Dr. Henning Kagermann, six working groups develop intermodal guidance to politicians, businesses and society in a technologically neutral way.
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