A digital twin of power systems is a software (digital twin) that simulates a mathematical model of an engineering system (on the example of heat and water supply) and a complex of objects (boiler house, pumping station, tank, well, etc.), which includes elements of the system objects (boilers, pumps, regulators, etc.) and a hydrodynamic model of pipeline networks integrated with GIS software (for example: "Polyterm Zulu") from the source to the consumer.