Institut für Energiesysteme und Elektrische Antriebe, Arbeitsgruppe Elektrische Anlagen
> Zum Inhalt

ZENEM - Zukünftige Energienetze mit Elktromobilität


Through the project ZENEM feasibility of integration of prospective electric-loads like electromobiliy in existed grid will be assessed. High penetration rate of electric vehicles (EV) causes higher power density in the distribution grid especially in the case of E-Taxi which features high concentration in taxi stands. Impact of E-taxies on the distribution network will be comprehensively investigated.

Project Aims

Future electricity grid will be confronted with new challenges. Continual increasing of electrical consumption such as emerge of electromobility is responsible for this confrontation. On the other side electric vehicles (EV) offer higher energy efficiency and reduce greenhouse gas emission. Without auto electrification the ambitious climate goal cannot be achieved and Austrian oil import dependence in transport sector is inevitable.

In this project for investigating the impacts of high penetration of electric vehicles on the distribution grid, replacement of a whole taxi fleet with electric cars including charging station infrastructure will be analyzed.

Since 2006, the trip of considered taxi fleet with a GPS-Logger has been recorded. From the GPS-data relevant transport characteristics will be extracted and applicability of Taxi stands as charging station will be examined. By the means of three optional parameters battery size, charging performance and charging station, different scenarios, which are examined in the subsequent analysis, with the help of load flow calculation and mathematical software will be investigated.

The basic requirement for further consideration is to meet the mobility necessities of Taxis. Based on these necessities the distribution grid in the term of voltage stability and current limiting will be simulated. In order to make a qualitative statement, at first the current household and commercial electricity will be identified through measurements.

By the means of simplified thermal model the grid component ageing via temporary overloading will be considered. High charging penetration will be allowed through temporary overloading in distribution grid with the minimum grid upgrading. It must be considered that permanent overloading on grid component is not acceptable.

If the overload for grid is prohibitive, so grid oriented charging strategies will be developed which allow the sustainable transmission. In consequence, it must be proved that whether in despite of change in charging process, the mobility needs remain fulfilled.

The results and knowledge of the project will allow the grid operator, a minimum upgrading in infrastructure and grid expansion.

By the final workshop on the environmental and economic aspects and general framework, experts from energy, transportation and politic sector can follow up the future realization scheme.

Final Report


Project Members

Project Leader:

  • Vienna University of Technology - Institute of Energy Systems and Electrical Drives

Project Partners:

  • Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H, AIT Mobility
  • Taxi 31300 VermittlungsgmbH
  • Wien Energie Stromnetz GmbH


Dipl.-Ing. Markus LITZLBAUER
Dr.techn. Andreas SCHUSTER


From 05/2011 till 04/2013

This project was funded by Klima- und Energiefonds in the programme „NEUE ENERGIEN 2020“.

This project is releated to the following research topic: ELECTROMOBILITY