In order to perform a real-life validation of the tools and methods a number of use cases will be tested in different distribution grids. The project will therefore build on the existing infrastructure at the involved DSOs (Enel, ESB, EDP and RWE) and the support of Renault. The use cases will be specifically defined in the course of the project (WP5) and will focus on the validation of the calculations of the planning tool as well as new methods for network operation and EV integration.
ESB will select a rural trial location on the network which will suit the particular validations that are required as a result of WP2. For the validation tests ESB can rely on a rural LV radial network supplied by a 10/20kV single phase circuit. The possibility of back-feeding/paralleling of the LV network will also be present. Re-sectionalisation of the network may also be required in order to apply a maximum base load prior to the injection of EVs. In order to validate results Smart Meters will be installed at all dwelling locations fed from the MV-LV trafo, the installation of a PQ meter at the sub location will also be required – installation of other devices/switches may also be required depending the exact specification of the use-case.
RWE will leverage on the test bed of the project “Smart Operator” (an internally financed RWE R&D project and not publicly funded). In this project smart controllers (smart operators) will be installed in different substations in the LV network that also includes charging infrastructure. These controllers function as autonomous agents performing a local load balancing. This intelligent grid operated will be used to validate operational methods under consideration for intelligent charging and local congestion issues due to DER feed-in. In addition, RWE envisages testing local overload caused by a large number of EV charging poles connected to one sub-station.
For the validation tests, EDP will build a link to the R&D and large-scale pilot/demonstration project “InovGrid”. InovGrid encompasses the deployment of a test site in Évora, Portugal (Inovcity), where a smart grid infrastructure exploiting different Information and Communication Technologies (ICT) solutions was implemented with more than 30’000 smart meters and including more than 1000 EV charging stations.
The distribution network in Évora municipality is supplied by two 60 kV substations. These substations are equipped with Remote Terminal Units (RTUs) that have integrated protection and automation functionalities. The LV distribution network in Évora has no restoration possibilities in the event of a fault. Thus, the possibility of installing storage devices and the implementation of load shedding and demand side management will be very important for network operation. In what concerns distributed generation, there are 223 microgenerators, mainly solar PV equipments, with an installed capacity of 701 kW, and a growth rate of 48% year on year, which increases the challenge is this area to integrate all this new DG. This network will be simulated under different EV and DER scenarios for the optimal investment as provided by the newly developed methods and planning tools.
Enel will rely on selected sections of its distribution grid to test use cases that are of high relevance with regard to updating of operational methods.
The operational procedures that are intended to be demonstrated through Enel's coordination in Italy are based on the principle of managing the EVs as controllable loads in response mainly to grid operator issues and requests, particularly upon a RENs hosting capacity hazard/opportunity, but also depending on data can be achieved by car manufacturers systems (eg. SoC of EV that are starting recharging processes).
With this aim, a portion of Italian LV grid managed by Enel will be selected with a reasonable availability of EV charging infrastructure installed and remotely managed through the EMMS, Enel's dedicated back-end system. Simultaneously, such a demo site will be hosting a cluster of EVs, most favourably a fleet involving Renault cars, remotely controlled by a dedicated OEM system. The charging infrastructure system will be linked with OEM back-end system to provide additional inputs to the hosted load management algorithms.