Electric Power Quality Analysis 6-10/0.4 kV Distribution Networks
- 1 Tashkent State Technical University by Named Abu Raikhan Beruni, Tashkent, Uzbekistan
Abstract
The paper reports quality analysis and evaluation at 6 - 10/0.4 kV low-voltage distribution grids in Uzbekistan. Power quality frequently does not correspond to the rated value which is largely due to unbalanced phase loading in grids and which also results in increased power loss. The study of the asymmetrical operating modes of the rural distribution networks of 0.4 kV was conducted in three steps: measurement, calculations and analysis of relevant data; providing practical guidelines and finally, implementing instruments to normalize grid operation. Measuring was conducted using certified instrumentation analyzer “MALIKA” designed by authors. The study and analysis of additional power losses as the function of indicators of asymmetrical features of voltage and current in operating 0.4 kV grids reveals that, quality of electric power at grids under investigation, merely does not meet the requirements of the Interstate Standard.
- Allaev, K.R. (2010) Electrical Power Sector of Uzbekistan and the World. Moliya, Tashkent, 256 p.
- OST 32144-2013 Electric Energy. Electromagnetic Compatibility of Technical Equipment. Power Quality Limits in the Public Power Supply Systems.
- Bessonov, L.A. (2007) Theory of Electrical Engineering. Gardariki, Moscow, 685 p.
- Wagner, K.F. and Evans, R.D. (1936) The Method of Symmetrical Components Applied to the Analysis of Asymmetric Electrical Chains with K.L. Fortescue’s Introduction (Translated from English by L.E.M.E. Syrkinykh, Edited by D.A. Gorodsky). Power and Energy Literature, Leningrad, 183 p.
- Kosoukhov, F.D. and Naumov I.V. (2003) Calculation of Voltage and Capacity Drop in Rural Distribution Grids at Current Unbalance. Irkutsk, 260 p.
- Zakaryukin, V.P. (2006) Modelling of Limit Modes of Electric Power Systems Taking into Consideration Longitudinal and Transverse Unbalance. ISEM SO RAN, Irkutsk, 139 p.
- Allayev, K.R., Holiddinov, I.Kh. and Shaismatov, S. A. (2015) Patent of the Republic of Uzbekistan for Useful Model, No. FAP 20150075 Analyzer for Registration of Additional Losses of Electric Power at Asymmetry of Loadings in Low-Voltage Electric Grids. Agency on Intellectual Property of the Republic of Uzbekistan.
- Kholiddinov, I.Kh. (2015) The Report on Business Contract No. 9/15 with JSC “Tashkentskoye TPES”, “Development of Methods, Software and Hardware Products Aimed at Ensuring Quality of Electric Power in 0.4 kV Distribution Grids. Tashkent, 65 p.
- Kartashev, I.I., Tulsky, V.N., Shamonov, R.G., et al. (2006) Electric Power Quality Management. MEI Publishing House, Moscow, 320 p.