3Smart (acronym of Smart Building – Smart Grid – Smart City) project started on 1, 2017 and lasted until the end of 2019. The project was co-financed from the European Union funds of ERDF and IPA (abbreviated for European Regional Development fund and Instrument for Pre-Accession Assistance) through the Interreg Danube Region Program, which supports international cooperation in the Danube Region. The total value of the 3Smart project was 3.791.343,41 EUR of which 321.413,96 EUR related to the budget earmarked for JP „Elektroprivreda HZ HB“ d.d. Mostar. EU funds co-financing was in the amount of 85% of the project value. The leading partner in the 3Smart project was the Faculty of Electrical Engineering and Computing (FER) Zagreb, and a total of 18 partners from six countries (Croatia, Slovenia, Austria, Hungary, Serbia and Bosnia and Herzegovina) participated in it. In addition to JP “Elektroprivreda HZ HB” d.d. Mostar the project partners from Bosnia and Herzegovina were the Faculty of Mechanical Engineering, Computing and Electrical Engineering (FSRE) of the University of Mostar and the Regulatory Commission for Energy in Federation of Bosnia and Herzegovina (FERK), as an associated strategic partner.
The main goal of the project was to provide technological and legislative support for the implementation of energy management systems at the level of buildings, energy networks and city infrastructures of larger cities in the Danube Region. The project results include a modular software tool for energy management of the building and the network, the built-in necessary equipment for the realization of a platform respecting technological and legal regulations at pilot locations in 5 countries (Croatia, Slovenia, Austria, Hungary, Bosnia and Herzegovina) and a strategy for enabling energy management in cities at the regulatory level in the Danube Region.
One of the mentioned pilot projects was implemented by JP “Elektroprivreda HZ HB” d.d. Mostar at its office building in Tomislavgrad, and installation of the equipment was completed in June 2018. After the completion of the 3Smart project, the aforementioned building became the first truly “smart” building in Bosnia and Herzegovina.
Thanks to the EMS platform, advanced heating and cooling systems (fan coils), sensors, sophisticated IT system, built-in photovoltaic power plant (total installed power capacity of 49.8 kWp), battery system for energy storage and a small meteorological station can be performed predictive energy management, management heating/cooling by zones as well as perform optimal energy exchange with the distribution network, which makes the building an active subject of the power network and can participate in balancing, that is, in increasing the flexibility of the distribution network. In conclusion, the expected benefits for the building are reflected in the following items:

• reduction of the building’s electric power consumption
• reduction in the use of electric power from the distribution network in the consumption of the building due to the use of power from the photovoltaic power plant
• reduction of the use of electric power from the distribution network in the consumption of the building due to the use of power from the battery system in time intervals when it is technically and economically justified
• reduction of the peak load of electric power from the distribution network.