Electricity grid – innovative hybrid grid and grid automation

The use of natural and renewable energy sources will be prioritized. These actions aim to lower primary energy requirements by 40 to 50 % and increase renewable energy by 30 %.

electricity-grid

Implemented measures in the demo cities

Partners in Bolzano will implement an Urban Service-Oriented Sensible Grid (USOS-grid) system in the South West district for improved energy distribution control. Measures include:

  • Recharge points for vehicles and bicycles;
  • Meteorological stations for local climate condition monitoring;
  • Smart retrofitting of the public lighting system.

In Innsbruck, the following measures were implemented:

  • IKB smart city lab
    The intension was to create a Smart District which implements different demonstration measures to form an innovative hybrid energy grid (a so called smart grid). Existing buildings are integrated and several decentralized energy producers using renewable energy are involved. The Figure below shows all installed units. The blue lines are for the micro-gird of electricity and all technologies that are connected, and the red lines are for heating and all the technologies that are connected. It can be clearly seen, that technologies either produce or consume electricity. The icon with the building represents the consumers.

    ikb-smart-district-all-technologies
    All technologies built in the IKB-Smart-District with Energymanagementsystem © IKB

    All these units installed are controlled from the central building control system, but now above this system is the developed energy management system (EMS). The EMS has three parameters on what the calculations for the timetable of power units are based on:

    • Temperature
    • Solar radiation
    • Electricity stock market price

    These parameters influence the EMS, then the EMS decides which unit shall run when and which storage shall be filled or unloaded.

    Based on the external forecast values for temperature, solar radiation, electricity stock market prices and the data the system collects from the single technologies (sensor data) an optimizing algorithm calculates operation schedules for the IKB-Smart-City-Lab. The goal of the algorithm is to minimize operating costs and CO2 production.

    Another focus is the design of the show room for visitors and guided tours. The intention is to reach as many people as possible with the showroom. Overall, an energy experience path is created on the site.

Ground plan of the IKB show room © IKB
View of the IKB show room © IKB
  • Heating with waste heat (heat recovery from the transformer UW Mitte)
    The heat pump with innovative waste heat utilization from transformation station was implemented at the IKB office building in the centre of Innsbruck and contributes considerably to the heat supply of the building. The existing heating system of the building was done by two 20 year old gas boilers. Nearby this building, there is a transformer substation with several indoor transformers. The aim was to substitute the gas boilers by installing a heat pump and use the waste heat from these indoor transformation stations with air/water heat exchanger so that an intervention of the oil cooling circuits is not needed. The implementation was finished in November 2016.
heat-pumps
Heat pumps © IKB
ikb-infoboard_heating-with-waste-heat
Info board “Heating with waste heat” © IKB

 

Challenges & solutions for the installation of an innovative hybrid grid

Not only technical but also social, legal and organisational challenges had to be faced and overcome by the SINFONIA partners and energy providers IKB, Tigas, Alperia and Municipality of Bolzano.

Keymessages for the successful implementation of innovative hybrid grid measures

Based on the experiences & findings by relevant stakeholders in Innsbruck & Bolzano the following key-messages were drafted:

Key-messages for smart points from Bolzano 

  • Do not start working on the project details before having a clear list of services offered to citizens by the Integrated Smart Points.
  • At the very beginning of a project, administer questionnaires to survey the needs and desires of citizens in order to define the list of services offered by Smart Points.
  • Realize the smart multifunctional Totem Smart Point capable of delivering truly useful services for citizenship.
  • Study in advance how to integrate the new smart grid into the current monitoring systems of the city.
  • Think of an attractive and user friendly design of the smart point as a landmark in the city.

Key-messages for applied technical measures from Innsbruck

  • Keep in mind that utilities are bound to general laws as well as to additional national regulations.
  • Reasonable effort is necessary for data transfer (e. g. personnel costs, server rental) – this should be clarified in the very beginning of the project.
  • In order to avoid differences and friction during implementation, it is essential to define clear responsibilities and competences within the project consortium before starting technical implementations (for e. g. costs, material, equipment, execution).
  • Recording of data is a very sensitive process. It is recommendable to draft contracts between involved parties. For drafting such contracts enough time has to be budgeted.
  • Besides the consideration of legal challenges a technical analysis of the current situation is essential.
  • Considering legal regulations and the state of technology, smart grid and district heating can be implemented without major problems.
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