Abstract
mine depths, and, as a consequence, drive motor power, lead to expansion of gearless slow-speed electric drive system application. One implementation variant of such an electric drive is a gearless electric drive based on a slow-speed synchronous electric motor receiving power from a three-level frequency converter with an active voltage rectifier. However, this system of electric drive for mine hoisting machines can cause a significant distortion of network voltage sinusoidal form. The influence of frequency-controlled electric drive with three-level active voltage rectifier on the supply network is considered. When studying the influence of the frequency-controlled electric drive (FCED) with an active voltage rectifier on the supply network in order to develop solutions to reduce the distortion of the network voltage sinusoidal form, the following variants of the active voltage rectifier influence on the supply network were considered: at the change of the network short-circuit power; at the change of the switching frequency; at the change of the reactive current setting signal; at the change of the electric drive power. On the basis of the conducted researches the following conclusions were made. When implementing a frequency-controlled with an active voltage rectifier, the power supply must be designed in such a way that its short-circuit power is greater than the value at which Ku (total harmonic coefficient of voltage components) is less than the standard value. When the short-circuit power of the power supply does not correspond to the normative value of Ku, power quality regulators should be applied. It is proposed to use a filter-compensating device at the 6 kV input of the converter transformer as a regulator of power quality. Another option is the development of a control algorithm for semiconductor devices, which makes it possible to exclude significant harmonics of the active voltage rectifier voltage in the spectrum.
Keywords
shaft lifting machine, gearless synchronous electric drive, three-level frequency converter, active voltage rectifier, higher harmonics, total coefficient of harmonic components of voltage, voltage form, matching transformer, switching frequency, short circuit power, electric drive load
1. Datskovsky L.H., Abramov B.I., Shevyreva N.Y., Shevyrev Yu.V. Electric drive of stationary installations in the mining industry. Trudy X Mezhdunarodnoy konferentsii po avtoma-tizirovannomu elektroprivodu [Proceedings of the X Interna-tional Conference on automated electric drive]. Novocher-kassk, LLC "Lik", 2018, pp. 169-174. (In Russian)
2. Abramov B.I., Ivanov A.G., Shilenkov V.A. Electric drive of modern mine lifting machines. Gornyi informatsionno-analiticheskiy bulleten [Mining informational and analytical bulletin], 2022, no. 5-2, pp. 145-162. (In Russian) doi: 10.25018/0236_1493_2022_52_0_145
3. Li J., Liu J.J., Boroyevich D., Mattavelli P., Xue Y.S. Three-level active neutral-point-clamped zero-current transition converter for sustainable energy systems. IEEE Transactions on Power Electronics. 2011, no. 26(12), pp. 3680-3693. doi: 10.1109/TPEL.2011.2161890
4. Abu-Rub H., Holtz J., Rodriguez J., Baoming G. Medium voltage multilevel converters - state of the art, challenges and requirements in industrial applications. IEEE Transactions on Industrial Electronics. 2010, no. 57(8), pp. 2581-2596. doi: 10.1109/TIE.2010.2043039
5. Zhang F., Yan Y. Selective harmonic elimination PWM control scheme on a three phase four-leg voltage source in-verter. IEEE Transactions on Power Electronics. 2009, no. 24(7), pp. 1682-1689. doi: 10.1109/TPEL.2009.2014378
6. Schreiner R.T. Matematicheskoe modelirovanie elektro-privodov peremennogo toka s poluprovodnikovymi preobra-zovatelyami chastoty [Mathematical modeling of AC electric drives with semiconductor frequency converters]. Yekaterin-burg, Ural Branch of the Russian Academy of Sciences, 2000. 654 p. (In Russian)
7. Vinogradov A.B., Korotkov A.A. Algoritmy upravleniya vysokovoltnym mnogourovnevym preobrazovatelem chastoty. [Algorithms for controlling a high-voltage multilevel fre-quency converter]. Ivanovo, Ivanovo State Power Engineer-ing University named after V.I. Lenin Publ., 2018. 184 p. (In Russian)
8. Vinogradov A.B. Vektornoe upravlenie elektroprivodami peremennogo toka [Vector control of AC electric drives]. Ivanovo, Ivanovo State Power Engineering University named after V.I. Lenin Publ., 2008. 320 p. (In Russian)
9. State Standard 32144-2013. Electrical energy. Electromagnetic compatibility of technical means. Power quality limits in the public power supply systems. Moscow: Standartinform Publ., 2014. 20 p. (In Russian)
10. Mulemba F.B.A., Shevyrev Yu.V. Study of the effects of a frequency-controlled electric drive with an active voltage rectifier (AVR) of a mine hoisting machine on the form of mains voltage. Avtomatizirovannyi elektroprivod, roboto-tekhnika i elektroenergetika: sbornik materialov mezhdu-narodnoy nauchno-prakticheskoy konferentsii, posvyash-chennoy 50-letnemu jubileyu kafedry elektroprivoda LGTU [Automated electric drive, robotics and electric power engi-neering: collection of materials of the international scientific and practical conference dedicated to the 50th anniversary of the LGTU electric drive department]. Lipetsk, Lipetsk State Technical University, 2024, pp. 237-240. (In Russian)
11. Nikolaev A.A., Gilemov I.G. Development and research of an improved PWM algorithm of an active rectifier with changeable tables of switching angles. Vestik Ivanovskogo gosudarstvennogo energeticheskogo universiteta [Vestnik IGEU], 2020, no. 6, pp. 48-56. (In Russian) doi: 10.17588/2072-2672.2020.6.048-056
12. Agelidis V.G., Balouktsis A., Balouktsis I., Cossar C. Multi-ple sets of solutions for harmonic elimination PWM bipolar waveforms: Analysis and experimental verification. IEEE Transactions on Power Electronics. 2006, no. 21(2), pp. 415-421. doi: 10.1109/TPEL.2005.869752
13. Nikolaev A.A., Bulanov M.V., Maklakov A.S., Gilemov I.G. Development and research of improved PWM algorithms for active rectifiers in order to improve the quality of electricity in in-plant electrical networks of 6-35 kV. Vestik Ivanovskogo gosudarstvennogo energeticheskogo universiteta [Vestnik IGEU], 2023, no. 6, pp. 69-81. (In Russian) doi: 10.17588/ 2072-2672.2023.6.069-081
Mulemba F.B.A., Shevyrev Yu.V., Shevyreva N.Yu., Kuzmin I.K. Influence of Frequency-controlled Electric Drive with Active Voltage Rectifier in Gearless Mine Lifting Machine on Network Voltage Shape. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2024, no. 3(64), pp. 51-58. (In Russian). https://doi.org/10.18503/2311-8318-2024-3(64)-51-58