Cascade frequency converters control features
- 1 — Saint Petersburg Electrotechnical University "LETI", named after V.I.Ulyanov (Lenin)
- 2 — «Silovyye mashiny» PJSC»
- 3 — Saint Petersburg Electrotechnical University "LETI", named after V.I.Ulyanov (Lenin)
- 4 — Saint Petersburg Mining University
Abstract
The structures of systems with high-voltage cascade frequency converters containing multi-winding transformers and low-voltage low-power converters connected in series at each output phase of the load are considered. Low-voltage blocks contain three-phase diode or active rectifiers, DC capacitor filters, single-phase stand-alone voltage inverters and block disconnecting devices in partial modes (in case of failure when part of the blocks are disconnected). The possibilities of operation of cascade converters are determined, equations for correcting tasks to units in partial modes are given, tables of correction of tasks with estimates of achievable load characteristics are proposed. The results of experiments on the model of a powerful installation with a cascade frequency converter are presented, confirming the possibility of ensuring the symmetry of the load currents when disconnecting part of the blocks and the asymmetry of the circuit.
References
- Egorov A.N., Semenov A.S., Fedorov O.V. Practical experience with POWER FLEX 7000 frequency inverters in
- the mining industry. Trudy NGTU im. R.E.Alekseeva. 2017. N 4 (119), p. 86-93 (in Russian).
- Efimov A.A. Active converters in variable AC drives. Novouralsk: Izd-vo NGTI, 2001, p. 250 (in Russian).
- Kozyaruk A.E. Energy efficient electromechanical systems of mining and transport machines. Zapiski Gornogo instituta. 2016. Vol. 218, p. 261-269 (in Russian).
- Kryukov O.V. Automated electric drive of turbochargers with high-voltage multilevel frequency converters. Avtomatizatsiya i IT v energetike. 2019. N 5 (118), p. 5-9 (in Russian).
- Kryukov O.V. Analysis of structures of frequency converters for technologically connected electric drive gas pumping units. Elektrotekhnicheskie sistemy i kompleksy. 2015. N 2 (27), p. 11-14 (in Russian).
- Pronin M.V., Vorontsov A.G. Power fully controlled semiconductor converters (modeling and calculation). St. Petersburg: Elektrosila, 2003, p. 172 (in Russian).
- Pronin M.V., Vorontsov A.G., Tereshchenkov V.V. Control of multi-cycle active rectifier of excavator EKG-35K. Gornoe oborudovanie i elektromekhanika. 2009. N 10, p. 29-33 (in Russian).
- Pronin M.V., Vorontsov A.G. Electromechanotron complexes and their modeling according to interconnected subsystems. St. Petersburg: Ladoga, 2017, p. 220 (in Russian).
- Shreiner R.T., Kalygin A.I., Krivovyaz V.K. Construction of high-voltage regenerative cascade direct frequency converters for electric drive. Elektrotekhnika. 2012. N 9, p. 8-13 (in Russian).
- Pronin M.V., Vorontsov A.G., Kalachikov P.N., Emelyanov A.P. Electric drives and systems with electric machines and semiconductor converters (modeling, calculation, application). St. Petersburg: Silovye mashiny. Elektrosila. 2004, p. 252
- (in Russian).
- Boonmee C., Kumsuwan Y. Control of single-phase cascaded H-bridge multilevel inverter with modified MPPT for grid-connected photovoltaic systems. IECON 2013. 39th Annual Conference of the IEEE Industrial Electronics Society. IEEE. Vienna. Austria. 2013. N 14016134.
- Carnielutti F, Pinheiro H. New modulation strategy for asymmetrical cascaded multilevel converters under fault conditions. IECON 2013. 39th Annual Conference of the IEEE Industrial Electronics Society. IEEE. Vienna. Austria. 2013. N 14016058.
- Ghoreishy H., Yazdian A.V. A new selective harmonic elimination pulse-width and amplitude modulation (SHE-PWAM) for drive applications.IECON 2013. 39th Annual Conference of the IEEE Industrial Electronics Society. IEEE. Vienna. Austria. 2013. N 14016018.
- Rodríguez J, Lai J.-S., Peng F.Z. Multilevel inverters: a survey of topologies, controls, and applications. IEEE Transactions on Industrial Electronics. 2002. Vol. 49. Iss. 4, p. 724-738.
- Rodríguez J., Pontt J., Musalem R., Hammond P. Operation of a medium-voltage drive under faulty conditions. IEEE Transactions on Industrial Electronics. 2005. Vol. 52. Iss. 4, p. 1080-1085.