Results of experimental and computational studies of electromagnetic interference generated by the electrical equipment of ship power facilities and their elements with non-linear characteristics

It is shown that the use of semiconductor converter equipment and electrical technologies with non-linear characteristics in ship power facilities and their elements causes electromagnetic interference in ship power systems, which are based on higher harmonics. The paper presents the analysis of the power quality indicators that regulate voltage and current harmonics in power supply systems. In order to develop solutions and approaches to ensure the electromagnetic compatibility of electrical equipment of ship power plants and their elements, the following have been performed: experimental studies of electromagnetic interference caused by the operation of ship electrical equipment, implemented on the basis of elements with non-linear characteristics; computational studies on a mathematical model of the propagation of higher harmonics of current and voltage through the elements of the ship's electric power system. Experimental studies of power quality indicators - higher harmonics, caused by the operation of electrical equipment with non-linear characteristics, have been carried out in the electric power system of the "Kruzenshtern" sailing training vessel. An analysis of the results of experimental studies of ship electrical equipment: semiconductor converters, power transformers, frequency-controlled electrical wires, LED lamps, and others showed that during their operation, odd current harmonics from the third and higher are emitted into the ship's electrical power system. The results of studies of the propagation of higher harmonic and related effects on a mathematical model developed on the basis of the equivalent circuit of a ship's electric power system for higher harmonics of an odd order, not multiples of three, are presented. On the mathematical model, the contribution has been estimated to the total coefficient of harmonic voltage components from semiconductor converters that feed the DC load. A relationship has been established from the influence of higher harmonics on the operation of asynchronous electric motors.

1. Kartashev I. I., Shamanov R. G., Vorobyov A. Yu., Sharov Yu. V., Tulsky V. N. Upravleniye kachestvom elektroenergii: uchebnoye posobiye dlya vuzov [Power quality management: textbook for universities]. Moscow, MEI Publ., 2006, 360 p.

2. Rossiyskiy morskoy registr sudokhodstva. Pravila klassifikatsii i postroyki morskikh sudov. Chastʹ XI "Elektricheskoye oborudovaniye" [Russian Maritime Register of Shipping. Rules for the classification and construction of sea vessels. Part XI "Electrical equipment"], no 2-020101–138. Saint-Petersburg, 2021. Available at: http://www.normacs.ru/Doclist/doc/1unh4.html (Accessed 5 July 2022).

3. State Standard 32144-2013. Electric energy. Electromagnetic compatibility of technical equipment. Power quality limits in the public power supply systems. Moscow, Standartinform Publ., 2014. 19 p. (In Russian).

4. Arryllaga J., Bradley D., Bodger P. Garmoniki v electricheskikh sistemakh [Power system harmonics]. Moscow, Energoatomizdat, 1990, 320 p.

5. Beley V. F., Brizhak R. O. Teoreticheskiy analiz elektromagnitnykh pomekh, obuslovlennykh rabotoy elektrooborudovaniya sudovykh energeticheskikh ustanovok i ikh elementov [Theoretical analysis of electromagnetic interference caused by the operation of electrical equipment of ship power plants and their elements]. Izvestiya KGTU, 2021, no. 63, pp. 103–115.

6. Zhezhelenko I. V. Vysshiye garmoniki v sistemakh elektrosnabzheniya prompredpriyatiy [Higher harmonics in power supply systems of industrial enterprises]. Moscow, Energoatomizdat, vol. 2, 1984, 160 p.

7. Shidlovskiy A. K., Zharkin A. F. Vysshiye garmoniki v nizkovolʹtnykh elektricheskikh setyakh [Higher harmonics in low-voltage electrical networks]. Kiev, Naukova dumka Publ., 2005, 211 p.