International Journal of Power Electronics and Drive Systems (IJPEDS) Vol. 14, No. 1, March 2023, pp. 222~232 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v14.i1.pp222-232  222 Journal homepage: http://ijpeds.iaescore.com The effect of the thyristor energy router on harmonics Elena Sosnina, Rustam Bedretdinov, Evgeny Kryukov Department of Electric Power Engineering, Power Supply and Power Electronics, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Nizhny Novgorod, Russia Article Info ABSTRACT Article history: Received Jul 10, 2022 Revised Nov 10, 2022 Accepted Nov 27, 2022 Energy routers (ER) are the key equipment of the energy internet that provides control over bidirectional power flows and the voltage level of an electric network. The paper presents the thyristor-powered ER (TER) for an Internet- style medium voltage distribution electric network (6, 10, 20 kV). The developed scheme of the device implements longitudinal and transverse voltage regulation at the ER connection point and it allows changing the power flow and the voltage level in the network. The article is devoted to the study of the harmonic components of voltage introduced into the electrical network by the semiconductor elements of the TER. A mathematical and a computer model and a prototype of an electric network section with a TER have been developed. The studies carried out with the help of the developed models have shown that the device does not significantly distort sinusoidally. The harmonic components factor of the output voltage has acceptable values over the entire range of an effective regulation. Keywords: Computer model Energy internet Harmonic components Mathematical model Prototype Thyristor energy router This is an open access article under the CC BY-SA license. Corresponding Author: Evgeny Kryukov Department of Electric Power Engineering, Power Supply and Power Electronics Nizhny Novgorod State Technical University n.a. R.E. Alekseev Minina St, 24, Nizhny Novgorod, Nizhny Novgorod Oblast, 603950, Russia Email: kryukov@nntu.ru 1. INTRODUCTION The energy internet (EI) is considered to be the second version of the smart grid [1] and was proposed as an evolution of the energy system in order to increase its efficiency in terms of energy production, transmission and consumption [2]. Unlike the smart grid which focus on the informatization and intellectualization of the existing energy system, the energy internet is the solution to energy problems in the Internet-style through bidirectional integration of information and energy flows. The construction of internet- style power systems will allow to expand the interaction of energy producers and consumers by ensuring free power flows in a medium voltage (MV) distribution electric network (DEN). New network participants can integrate seamlessly into the common infrastructure and exchange electricity as easily as when transmitting information over the internet. The construction of an Internet-style power system is possible using a smart power flow control device, which is an energy analog of an Internet router. This device or energy router (ER) is the basic device of the energy internet which allows users to interact within the united groups of participants in the energy market [3]. An analysis of the publications devoted to EI showed that most articles are reviews. The works are dedicated to the features of EI [4], [5], the EI architecture [1], [5], information and communication technologies (ICT) application in EI [1], [6], [7], the key equipment of EI [4], [8], technologies and applications of EI Blockchain [9] and some other issues. The main problems associated with the creation of an internet-style electrical network concerning the architecture, control system, power equipment, are considered conceptually.