Abstract
The paper discusses the concept and importance of the digital twin of a heat network for modern energy systems. A digital twin is a virtual representation of a real heat network, which allows system operators to efficiently manage and optimize heat supply operations. The advantages of using digital twins are in predicting network efficiency and reducing energy losses. The main stages of creating a digital twin of heat networks are given, as well as the required functionality for thermal-hydraulic calculations. As an example, the process of creating a digital twin for the heating network of Pavlodar city is described.