Évora is a Portuguese Municipality located in the Alto Alentejo Region, around 130km from Lisbon, with a population of almost 60,000 inhabitants in an area of 1307.08 km2. Évora was also chosen as the first EDP Labelec smart city in the InovGrid project, a project led by EDP Distribuição, the main Portuguese Distribution System Operator (DSO), aiming at promoting a better network management and energy efficiency. The test bed itself is located in Valverde, a small rural village in the countryside of Évora, with around 450 inhabitants and 238 clients connected to the Low Voltage (LV) grid.

 

Power grid architecture

The power grid chosen for the Évora Demonstrator includes two grid secondary substations (Medium Voltage/LV substations) and a client-owned secondary substation.

This diagram represents the Power Grid Architecture of the Évora Demonstrator and the elements depicted in colour represent the equipment to be installed in the existing grid (shown in black).

projectsensible.eu image: Power grid architecture diagram
Power Grid Architecture of the Évora Demonstrator

The image shows:

  • A circuit breaker aiming at enabling the creation of a micro grid
  • Electrochemical storage and supercaps at the secondary substation
  • Electrochemical storage at the LV grid, along the feeders
  • Smart meters that enable Demand Side Management (DSM) functionalities
  • Residential storage in the form of both electrochemical batteries and of thermal water heating units as well as Photovoltaic Systems
  • Home Energy Management Systems (HEMS) aimed at integrating, controlling and managing the aforementioned customer’s applications (as well as controllable loads spread throughout the house)
projectsensible.eu image: Residential storage architecture
Residential storage architecture

ICT

The architecture of all the systems and devices and data flow between these systems are defined in this diagram:

projectsensible.eu image: Evora IT architecture
IT architecture

The components of the Évora architecture can be grouped according to the ownership/responsibility of each of the components:

  • DSO Infrastructure
  • Independent Actors
  • Market Operators
  • Client/Retailer Infrastructure

The DSO devices include the InovGrid devices, namely the smart meters and the DTC. The DMS Data Base collects all the data communicated via DTC and acts as a middleware between the downstream Smart Grid (and all the grid connected devices) and the upstream Real Time Platform. The MV Storage System is designed to enable the power backup of the Évora University Campus, and is part of a separate project for a MV Electrical Energy Storage, launched by EDP Distribuição.

Laboratorial and real environment test

Five uses are foreseen for the Évora demonstrator:

  • Flexibility and DSM in the market participation
  • Optimizing the Medium Voltage (MV) Distribution Network Operation using available storage resources
  • Optimizing the operation of storage devices in the LV network
  • Islanding Operation of Low Voltage Networks
  • Microgrid Emergency Balance Tool

Live data from the Évora community

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Solar PV energy produced

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Water heater energy used

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Battery energy used

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Participants
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Average water heater temp. (°C)
projectsensible.eu image: Graphic showing how battery charge

Average battery charge (%)

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Total solar PV energy produced

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Total energy exported to grid

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Total CO2 saved