*Proceeding Paper* **Designing a Digital Twin of a Wind Farm †**

**Liudmila Massel, Aleksei Massel \*, Nikita Shchukin and Aleksey Tsybikov**

Melentiev Energy Systems Institute Siberian Branch of the Russian Academy of Sciences (ESI SB RAS), Lermontov St., 130, Irkutsk 664033, Russia; lvmassel@gmail.com (L.M.); niksha14@mail.ru (N.S.); tsibikow@mail.ru (A.T.)


**Abstract:** The article is devoted to the development of a prototype digital twin of a wind farm. An overview of existing works and solutions in the field of digital twins in wind energy is given. The approach to building a digital twin based on ontological engineering, which is widely used in the works of the authors, is considered in detail. An ontological approach is described, which the authors develop and use in the design and development of digital twins (the development is carried out on digital twins of wind farms and photovoltaic systems). The adapted stages of ontological engineering, examples of fragments of the ontological knowledge space in the field of wind energy and the ontology of tasks of the digital twin of a wind farm are given. The architecture of the digital twin prototype under development has been developed and proposed for consideration. The key parts in the structure of the developed digital twin are described. A mathematical model for determining the operation parameters of a wind farm is considered. Special attention is paid to the stages of implementation of the prototype of the digital twin of the wind farm.

**Keywords:** digital twin; wind farm; ontological engineering
