DOI: https://doi.org/10.15407/publishing2017.48.027

CORRECTION OF THE REGIME OF A WEAK ELECTRIC NETWORK WHEN STARTING THE ELECTRIC MOTOR WITH COMPARABLE POWER

О.I. Chyzhenko, I.V. Trach
Institute of Electrodynamics of the National Academy of Sciences of Ukraine,
Peremohy, 56, Kyiv-57, 03680, Ukraine,
е-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

The regime of a weak electric network when starting the electric motor is considered when its power is comparable with the power of the network.To compensate the starting currents of the electric motor, it is proposed to use a device containing a bridge thyristor controlled reactive power compensator and LC filters of higher current harmonics. A model of an electric network with an active-inductive load is considered, from which a direct start of an induction motor is carried out in the absence of a mechanical load on its shaft.The parameters of the TRK filter are selected.The currents and voltages on the elements of the model are analyzed. The advantages of using the" reactive power compensator-filter" device for the purpose of protecting the electrical equipment from starting currents and voltage drops, as well as guaranteed start of the electric motor are shown. References 8, figures 4, table 1.
Key words: weak electric network, thyristor compensator of reactive power, LC-filters, start the electric motor, currents and voltages.

1. Bibik O.V., Popovych O.M., Shevchuk S.P. Power-efficient modes of electromechanical system of a pumping installation of a multi-storey building. Tekhnichna elektrodynamika. 2016. No 5. P. 38-45. (Ukr)
2. Volkov I.V., Lesnik V.A., Chyzhenko A.I. Asynchronous generator with a high overload capacity. Tekhnichna elektrodynamika. Problemy suchasnoi elektrotekhniky. 2000. Part 4. P. 48-53. (Rus)
3. Chyzhenko A.I. Analysis of electromagnetic processes in a compensation rectifier with limited values of inductance of a smoothing inductor. Pratsi Instytutu elektrodynamiky. Energoefektyvnist. 2001. P. 17-27. (Rus)
4. Patent of Ukraine No 26222, MKI 6 Н 02 Р 9/44 1999. Generator power source. I.M. Chyzhenko, I.V. Volkov, V.Ya. Lisnyk, O.I. Chyzhenko. Published on 1999. Bull. No 4.
5. Czarnecki L.S. Common and Fixed-Poles Resonant Harmonic Filters. Europ. Trans. on Electrical Power, ETEP Vol. 8, No. 5, Sept./Oct. 1998. P. 345-351. DOI: https://doi.org/10.1002/etep.4450080505
6. Ginn H.L. III and Czarnecki L.S. An Optimization Based Method for Selection of Resonant Harmonic Filter Branch Parameters. IEEE Transactions on Power Delivery, Vol. 21, No.3, July 2006. P. 1445-11451. DOI: https://doi.org/10.1109/TPWRD.2005.860261
7. Mishra G. Design of Passive High Pass Filter for Hybrid Active Power Filter Applications A Thesis of the Degree of Master of Technology. National Institute of Technology. Rourkela. 2013. P. 57.
8. Trach I., Zubiuk Yu. A combined approach to multiobjective optimization of capacitor placement in radial distribution networks. 3-rd Intern. Conf. on Electric Power and Energy Conversion Systems (EPECS 2013). http://www.epecs-conf.org/files/EPECS13_CP_FV.pdf