TILOS aims to demonstrate the optimal integration of local scale energy storage in a fully-operated, smart island microgrid that will also communicate with a main electricity grid. The main objective of the project will be the development and operation of a prototype battery storage system, based on NaNiCl2 batteries, provided with an optimum, real-environment smart grid control system and coping with the challenge of supporting multiple tasks, ranging from microgrid energy management, maximization of RES penetration and grid stability, to export of guaranteed energy amounts and provision of ancillary services to the main grid. The battery system will support both stand-alone and grid-connected operation, while proving its interoperability with the rest of microgrid components, including demand side management (DSM) aspects and distributed, residential heat storage in the form of domestic hot water.
At the same time, TILOS project addresses the high-priority area of island regions. In doing so, apart from Tilos island, TILOS also engages the islands of Pellworm, La Graciosa and Corsica, aiming to create an island platform that will enable transfer of technological experience by making use of the smart grid system of Pellworm on the one hand, and by offering new case studies for the development of similar projects on the other. Elaboration of new case studies will be enabled by the development of an advanced microgrid simulating tool, i.e. the Extended Microgrid Simulator, offering the potential for the detailed examination of different battery technologies and microgrid configurations (stand-alone, grid connected and power market-dependent systems). Furthermore, by also addressing social issues, through public engagement, and by developing novel business models and policy instruments, TILOS puts emphasis on the market diffusion of the developed battery storage system and the integrated energy solution implemented on the island of Tilos.
Aiming to achieve market uptake of local scale innovative energy storage configurations through the development of optimum integration directions, TILOS makes use of a holistic approach that addresses all aspects of the subject investigated. To this end, TILOS is not limited to the demonstration and operation of a demo hybrid RES-battery storage power station, but extends to also take into account of additional attributes capturing business and social science disciplines. By seeking a deeper understanding of the public perception and acceptance levels through the constant monitoring and feedback-filtering of the local population of the island of Tilos, TILOS wishes to challenge increased levels of public engagement that will facilitate the implementation of the proposed energy solution.
In this regard, although the focus is placed on the local population of Tilos, geographical studies will be carried out during the project adding ethnographic research characteristics that will provide a more collective picture of how the public respond to the idea of active participation. Nevertheless, active participation and public engagement goes beyond this stage to also consider of novel business models and schemes between the private and the public sector, which can accelerate innovation in the field of energy storage and smart grids. This is actually one of the main challenges that the TILOS project aims to address, i.e. to quantify the social welfare produced by the operation of novel microgrid shemes, to seek its maximization through achieving high levels of public engagement and finally to indicate appropriate models that will allow the local population to harvest it.
This is also directly associated with the demonstration of three different system operation scenarios, with each of them implying different levels of public engagement and public benefits (as these are perceived by the local population), calling the local population to also contribute to the debate on the local optimum. The three demo-scenarios include:
A. Completely stand-alone island operation for part of Tilos island with the exclusive use of the developed smart microgrid. The aim of this first scenario is to demonstrate the ability of similar schemes to support energy autonomy and grid stability under grid-forming mode of operation, challenging at the same time the extent to which smart grid attributes can be applied (forecasting ability [Daniel He21] in combination with DSM potential). The specific scenario reflects to isolated island regions, investigating the option of ~100% energy autonomy on the basis of RES-based power generation.
B. Entire island needs' satisfaction with the contribution of RES-battery storage, diesel power and interconnection. The specific scenario reflects to island regions appreciating interconnection and investigating the option of moderate/increased RES penetration complemented by the increased use of interconnections.
C. Smart interaction between the microgrid and the host grid. The specific scenario, introducing also market operation characteristics, reflects to island regions appreciating interconnection and investigating the option of quite high RES penetration together with the exploitation of the RES energy surplus and the battery storage asset to perform energy management under the most economically effective ways.
With this in mind and considering also that battery storage is the core element of TILOS, the project main aims with regards to battery storage are synopsized in the following:
- Deliver a fully operated NaNiCl2 battery energy storage system that can efficiently support both stand-alone (grid forming) and grid-connected (grid following) operation of a microgrid system.
- Demonstrate the ability of one, single battery storage technology, to support a series of different functionalities like energy balancing, grid stability and security of supply for a microgrid, together with the delivery of guaranteed energy exports and the provision of ancillary services to a main grid communicating with the microgrid.
- Value the multiple services potentially provided by local-scale battery storage, considering also social benefits produced by the system operation as well as operation in electricity market-dependent environments (through the investigation of additional, appropriate cases studies).
- Evaluate the life-cycle socioeconomic performance of local scale battery storage under the examination of the different microgrid setups.
- Build novel business models for local scale battery storage, considering also the option of private-public partnerships and the active engagement of local people at the community level.
More information on TILOS can be found at: http://www.tiloshorizon.eu/