A voltage loss preliminary estimation in ac busbars
/ 0
- Details
- Category: Power Supply Technologies
- Last Updated on 01 September 2019
- Published on 19 August 2019
- Hits: 3491
Authors:
Yu.S.Bezverkhnia, orcid.org/0000-0002-8779-2615, Zaporizhzhia National Technical University, Zaporizhzhia, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract:
Purpose. The development of a universal criterion of determining busbar parameters for operating or calculating values of network power factor, as well as defining parameters of reactive power compensation devices for reducing losses and voltage drops in three-phase systems of power networks. Improvement of the method of preliminary voltage drop estimation in these systems of power networks, which allows taking into account the influence of the skin-effect, the proximity-effect, density and frequency of fundamental and higher current harmonics, depending on the design parameters of steel busbars, short-circuit ratio and operating or calculating values of network power factor.
Methodology. For preliminary estimation of voltage drop in AC busbars, the analytical expressions were used which allow taking into account the design parameters of busbars, the skin-effect, the proximity-effect, density and frequency of the first and higher current harmonics. The preliminary estimation of the full or partial voltage drop compensation, caused by at action of the higher current harmonics was performed by the method of comparative analysis.
Findings. A dimensionless function is proposed for estimation of the behavior of busbar voltage drop and optimal choice of their design parameters, depending on calculating or operating values of network power factor for active-inductive and active-capacitive loads. At the design or modernization stages of the workshop networks, for needed or operating value of the network power factor, the dimensionless function allows estimating the resistance and reactance ratio of busbars for the purpose of minimizing voltage drop from overflows of reactive power in the shop networks. For the active-capacitive loads, the dimensionless function provides a preliminary estimation of the required rated value of power of the reactive power compensation devices to minimize the voltage drop in the busbars of the networks. By the improved technique of selecting the optimal busbar design parameters, with the influence of the skin-effect, proximity, density and frequency of the fundamental and higher current harmonics voltage drop was evaluated in conditions of non-sinusoidal busbar current. Depending on the short-circuit ratio and the current loads, the value of the voltage drop of busbars would increase by 1.73–2.51 times. At the maximum allowable current load value of busbars, the full compensation, and particular overcompensation of the voltage drops, caused by the action of higher current harmonics, is performed at lower values of the short-circuit ratio. In this case, the reactive power compensation devices with a smaller related capacity value can be used. At high values of the short-circuit ratio, the current load of busbars must be reduced.
Originality. A universal criterion in the form of a dimensionless function was proposed. For the operating or calculating values of network power factor, it allows choosing the optimal design parameters for steel busbars, as well as defining the parameters of reactive power compensation devices for reducing losses and voltage drops in three-phase networks power systems. The method of preliminary voltage drop estimation in AC three-phase networks power systems, which allows taking into account the influence of the skin-effect, the proximity-effect, density and frequency of the first and higher current harmonics, depending on the design parameters of steel busbars, short-circuit ratio and operating or calculating values of the network power factor was improved.
Practical value. Recommendations were proposed for reducing the voltage drop in busbars, caused by the action of higher current harmonics, depending on the short-circuit ratio of the network and the values of current loads of the steel busbars. The results of this work can be used at design or modernization stages of workshop network systems. This will provide a qualified approach to the formation of requirements for reactive power compensation devices and converters, which are sources of higher current harmonics generation.
References.
1. Oliinyk, A., Leoshchenko, S., Lovkin, V., Subbotin, S., & Zaiko, T. (2018). Parallel data reduction method for complex technical objects and processes. In IEEE: The International Conference on Dependable Systems, Services and Technologies (DESSERT) (pp. 496-501). Kyiv, Ukraine. DOI: 10.1109/DESSERT.2018.8409184.
2. Oliinyk, A., Subbotin, S., Lovkin, V., Leoshchenko, S., & Zaiko, T. (2018). Development of the indicator set of the features informativeness estimation for recognition and diagnostic model synthesis. In IEEE: 14th International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer Engineering (TCSET 2018) (pp. 903-908). Lviv-Slavske, Ukraine. DOI: 10.1109/TCSET.2018.8336342.
3. Yarymbash, D., Yarymbash, S., Kotsur, M., & Divchuk, T. (2018). Analysis of inrush currents of the unloaded transformer using the circuitfield modelling methods. Eastern-European Journal of Enterprise Technologies, 3(5(93)), 6-11. DOI: 10.15587/1729-4061.2018.134248.
4. Gaoyu, Z., Zhengming, Z., & Liqiang, Y. (2013). Study on DC busbar structure considering stray inductance for the back-to-back IGBT-based converter. In IEEE:Applied Power Electronics Conference and Exposition (APEC) (pp. 1213-1218). Long Beach, CA, USA. DOI: 10.1109/APEC.2013.6520453.
5. Sung, W.P., & Hyunsu, Ch. (2014). A practical study on electrical contact resistance and temperature rise at the connections of the copper busbars in switchgears. In IEEE: Applied Power Electronics Conference and Exposition (APEC 2013) (pp. 1213-1218). New Orleans, LA, USA. DOI: 10.1109/HOLM.2014.7031066.
6. GOSTIEC (61000-3-12-2016) Electromagnetic compatibility of technical means. Limit of harmonic current components created by technical means with a current consumption of more than 16 A, but not more than 75 A (in one phase), connected to low-voltage general-purpose power systems. Norms and methods of testing. (n.d.). Retrieved from http://docs.cntd.ru/document/1200142706.
7. Yarymbash, D.S., Kotsur, M.I., Yarymbash, S.T., Kylymnyk, I., & Divchuk, T. (2018). An Application of Scheme and Field Models for Simulation of Electromagnetic Processes of Power Transformers. In IEEE: 14th International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer Engineering (TCSET 2018) (pp. 308-313). Lviv-Slavske, Ukraine. DOI: 10.1109/TCSET.2018.8336209.
8. Zhemerov, G., & Tugay, D. (2014). Energy and power in power supply systems with semiconductor converters and energy storage. Electrical Engineering & Electromechanics, 1, 45-57. DOI: 10.20998/2074-272X.2014.1.09.
9. Kotsur, M., Yarymbash, D., Kotsur, I., & Bezverkhnia, Yu. (2018). Speed Synchronization Methods of the Energy-Efficient Electric Drive System for Induction Motors. In IEEE: 14th International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer Engineering (TCSET 2018) (pp. 304-307). Lviv-Slavske, Ukraine. DOI: 10.1109/TCSET.2018.8336208.
10. Bao, Y.J., Cheng, K.W., Ding, K., & Wang, D.H. (2013). The study on the busbar system and its fault analysis. In IEEE: 5th International Conference on Power Electronics Systems and Applications (PESA 2013) (pp. 30-36). Hong Kong, China.DOI:10.1109/PESA.2013.6828246.
11. Chen, C., Pei, X., Chen, Y., & Kang, Y. (2013). Investigation, evaluation, and optimization of stray inductance in laminated busbar. IEEE Trans. Power Electron., 29(7), 3679-3693. DOI: 10.1109/TPEL.2013.2282621.
12. Plesca, A. (2012). Busbar heating during transient conditions. Electric Power Syst. Res., 89, 31-37. DOI: 10.1109/ T‑AIEE.1915.4765211.
13. Rosskopf, A., Bar, E., & Joffe, C. (2014). Influence of inner skin- and proximity effects on conduction in litz wires. IEEE Trans. Power Electron., 29(10), 5454-5461, DOI: 10.1109/TPEL.2013.2293847.
14. Stepanenko, A., Oliinyk, A., Deineha, L., & Zaiko, T. (2018). Development of the method for decomposition of superpositions of unknown pulsed signals using the secondorder adaptive spectral analysis. Eastern-European Journal of Enterprise Technologies, 2(9(92)), 48-54. DOI: 10.15587/1729-4061.2018.126578.
15. Zhemerov, G., & Tugay, D. (2015). Components of the total power losses in three-phase energy supply systems with symmetric sinusoidal voltage source. Electrical Engineering & Electromechanics, 4, 28-34. DOI: 10.20998/2074-272X.2015.4.05.
16. Zhemerov, G., & Tugay, D. (2016). Components of total electric energy losses power in pqr spatial coordinates. Electrical Engineering & Electromechanics, 2, 11-19. DOI: 10.20998/2074-272X.2016.2.02.
17. Yarymbash, D., Yarymbash, S., Kotsur, M., & Divchuk, T. (2018). Enhancing the effectiveness of calculation of parameters for short circuit of threephase transformers using field simulation methods. Eastern-European Journal of Enterprise Technologies, 4(5(94)), 22-28. DOI: 10.15587/1729-4061.2018.140236.
18. Popa, I., & Dolan, A.I. (2013). Numerical modeling of DC busbar contacts. In IEEE: 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM 2012) (pp. 188-193). DOI: 10.1109/OPTIM.2012.6231869.
19. Popa, I.C., Dolan, A.-I., Ghindeanu, D., & Boltasu, C. (2014). Thermal modeling and experimental validation of an encapsulated busbars system. In IEEE: 2014 18th International Symposium on Electrical Apparatus and Technologies (SIELA) (pp. 1-4). Bourgas, Bulgaria. DOI: 10.1109/SIELA.2014.6871884.
20. Manohar, D.M., & Vasanthakumari, R. (2016). Effect of pressure and temperature on properties of carbon-carbon composites prepared from renewable material. In IEEE: 2016 International Conference on Control, Computing, Communication and Materials (ICCCCM) (pp. 1-5). Allahbad, India. DOI:10.1109/ICCCCM.2016.7918217.
Archive