INTEGRATED METHOD FOR OPTIMIZING THE PERFORMANCE OF ELECTRICAL EQUIPMENT UNDER THE INFLUENCE OF UNBALANCE AND HARMONICS DISTURBANCES

Andrei Decebal ENGHES, Emil CAZACU

Abstract


Transformers and induction motors are fundamental components of modern power systems, whose performance can be significantly affected by the presence of unbalance and harmonics in electrical networks. These disturbances generate additional energy losses, reduce operational efficiency, and may shorten the lifespan of equipment. This paper presents an innovative integrated method that combines theoretical analysis, numerical simulations, and experimental data to assess and optimize the performance of electrical equipment under disturbed operating conditions. The novelty of the method lies in the integration of multiple disturbance factors into a unified model, capable of accurately diagnosing issues and proposing customized solutions. The validation of the method has demonstrated a reduction in energy losses by up to 15%. 

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References


E. Cazacu, L. Petrescu., Industrial Electrical Systems Expertise (In Romanian, Expertiza Sistemelor Electrice Industriale), PRINTECH Ed., ISBN 978-606-23-0231-3, Bucharest, Romania, 2014.

H. Albert, S. Gheorghe, N, Golovanov, L. Elefterescu, R. Porumb, Calitatea energiei electrice. Contributii. Rezultate. Perspective, A.G.I.R., ISBN 978-973-720-497-4, Bucharest, Romania, 2013.

N. Golovanov, N. Mogoreanu, C. Toader, R. Porumb, Eficienţa energetică. Mediul. Economia modernă, A.G.I.R., ISBN978-973-720-698-5, Bucharest, Romania, 2017.

E. Cazacu, L. Petrescu, V. Ionita, Elemete de calitate si eficienta a energiei in instalatiile electrice moderne, MATRIX ROM, ISBN 978-606-25-0564-6, Bucharest, Romania, 2020.

S. Costinaş, Asigurarea calitatii serviciului de alimentare cu energie electrică, A.G.I.R., ISBN 978-973-720-436-3, Bucharest, Romania, 2012.

IEEE Standard 1459, IEEE Standard Definitions for the Measurement of Electric Power Quantities Under Sinusoidal, Nonsinusoidal, Balanced or Unbalanced Conditions, 2010.

IEC Standard 61000-4-30, Testing and measurement techniques – Power quality measurement methods, 2012.

N. Golovanov, I. Ionescu, N. Mira, P. Postolache, C. Toader s.a., Consumatori de energie electrica. Materiale. Aparate. Instalatii. Masurari, A.G.I.R., ISBN 978-973-720-240-6, Bucharest, Romania, 2009.

A. Engheș, E. Cazacu, L. Petrescu, A Comparative Analysis of European and American Standards in Power Quality Engineering, The Scientific Bulletin of Electrical Engineering Faculty, Volume 24, Issue 1, ISSN 2286-2455, Bucharest, Romania, 2024.

IEEE Std. C57.110-2018 Recommended Practice for Establishing Liquid-Immersed and Dry-Type Power and Distribution Transformer Capability When Supplying Nonsinusoidal Load Currents.

J. Faiz, M. Ghazizadeh, H. Oraee, Derating of transformers under non-linear load current and non-sinusoidal voltage – an overview, IET Electric Power Applications, vol. 9, no. 7, pp. 486-495, , ISSN 1751-8660, 2015.

M. Ghazizadeh, J. Faiz, H. Oraee, Derating of distribution transformers under non linear loads using a combined analytical-finite elements approach, IET Electric Power Applications, vol. 10, no. 8, pp. 779-787, ISSN 1751-8660, 2016.

IEEE Standard CF57-110, IEEE Standard Definitions for Establishing Liquid-Filled and Dry Type Power and Distribution Transformer Capability when Supplying Nonsinusoidal Load Current, 2008.

UL 1562-2013 Standard for Transformers, Distribution, Dry-Type - Over 600 Volts.

UL 1561-2015 Standard for Dry-Type General Purpose and Power Transformers.

E. Cazacu, L. Petrescu, V. Ioniţă, Derating of power distribution transformers serving nonlinear industrial loads, IEEE Int. Conf. on Optimization of Electrical and Electronic Equipment (OPTIM 2017) & Intl Aegean Conference on Electrical Machines and Power Electronics (ACEMP), pp. 90-95, Brasov, Romania, May 2017.

S. Sarwito, Semin and M. Hanif, Analysis of unbalanced load effect of three phase transformer feedback 61-103 performance on the various connection windings, 2017 International Conference on Advanced Mechatronics, Intelligent Manufacture, and Industrial Automation (ICAMIMIA), Surabaya, Indonesia, 2017, pp. 146-150, doi: 10.1109/ICAMIMIA.2017.8387575.

A. D. Kolagar, P. Hamedani and A. Shoulaie, The effects of transformer connection type on voltage and current unbalance propagation, 2012 3rd Power Electronics and Drive Systems Technology (PEDSTC), Tehran, Iran, 2012, pp. 308-314, doi: 10.1109/PEDSTC.2012.6183346.

O. U. Omeje, A. S. Alayande, T. O. Akinbulire, F. N. Okafor and J. I. Ebelechi, Propagation of Current and Voltage Unbalance in Electrical Power Networks, 2019 IEEE PES/IAS PowerAfrica, Abuja, Nigeria, 2019, pp. 493-498, doi: 10.1109/PowerAfrica.2019.8928821.

A. Njafi, İ. İskender and N. Genc, Evaluating and derating of three-phase distribution transformer under unbalanced voltage and unbalance load using finite element method, 2014 IEEE 8th International Power Engineering and Optimization Conference (PEOCO2014), Langkawi, Malaysia, 2014, pp. 160-165, doi: 10.1109/PEOCO.2014.6814418.

A. Najafi, B. Dokmetas and I. Iskender, Estimation of stray loss and leakage flux in the structural Component of 3-phase distribution transformer under unbalanced voltage based on numerical analysis, 2015 6th International Conference on Modeling, Simulation, and Applied Optimization (ICMSAO), Istanbul, Turkey, 2015, pp. 1-5, doi: 10.1109/ICMSAO.2015.7152219.

Z. Shen, Z. Zheng, Y. Fu and Z. Yin, The Impact of Three-phase Unbalance in Power Grid on the Losses of Distribution Equipment, 2023 2nd International Conference on Smart Grids and Energy Systems (SGES), Guangzhou, China, 2023, pp. 106-109, doi: 10.1109/SGES59720.2023.10366892.

E. T. Mharakurwa, G. N. Nyakoe and A. O. Akumu, Thermal Modeling of Power Transformers with Unbalanced Loading, 2018 IEEE PES/IAS PowerAfrica, Cape Town, South Africa, 2018, pp. 126-130, doi: 10.1109/PowerAfrica.2018.8521168.

F. Möller and J. Meyer, Survey of voltage unbalance and unbalanced power in German public LV networks, 2022 20th International Conference on Harmonics & Quality of Power (ICHQP), Naples, Italy, 2022, pp. 1-6, doi: 10.1109/ICHQP53011.2022.9808568.

L. Gang et al., Influence of Unbalanced Secondary Burden on Voltage Error of Voltage Transformers in Distribution Power System, 2020 Asia Energy and Electrical Engineering Symposium (AEEES), Chengdu, China, 2020, pp. 836-842, doi: 10.1109/AEEES48850.2020.9121387.

E. C. Quispe and I. D. Lopez, Effects of unbalanced voltages on the energy performance of three-phase induction motors, 2015 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA), Bogota, Colombia, 2015, pp. 1-6, doi: 10.1109/PEPQA.2015.7168237.

A. Cogburn and P. Bhattarai, Impacts on the Grid-Side Voltage Due to the Current Unbalance Amplification Caused by Induction Motors, 2024 IEEE Texas Power and Energy Conference (TPEC), College Station, TX, USA, 2024, pp. 1-6, doi: 10.1109/TPEC60005.2024.10472266.

Prateeksha and P. Thakur, Assessment of Voltage Unbalance Factor to Evaluate its Effect on Three Phase Induction Motor, 2023 3rd International Conference on Emerging Frontiers in Electrical and Electronic Technologies (ICEFEET), Patna, India, 2023, pp. 1-6, doi: 10.1109/ICEFEET59656.2023.10452198.

E. C. de Lima, J. M. de Carvalho Filho and J. S. de Sá, Behavior of losses in three-phase induction motors under unbalanced voltages, 2016 17th International Conference on Harmonics and Quality of Power (ICHQP), Belo Horizonte, Brazil, 2016, pp. 792-797, doi: 10.1109/ICHQP.2016.7783390.

J. Faiz, H. Ebrahimpour and P. Pillay, Influence of unbalanced voltage on the steady-state performance of a three-phase squirrel-cage induction motor, in IEEE Transactions on Energy Conversion, vol. 19, no. 4, pp. 657-662, Dec. 2004, doi: 10.1109/TEC.2004.837283.

S. H. Kishan and S. P. Gupta, Effect of voltage unbalance and stator inter turn short circuit on the characteristics of an induction motor, 2012 IEEE 5th India International Conference on Power Electronics (IICPE), Delhi, India, 2012, pp. 1-6, doi: 10.1109/IICPE.2012.6450412.

H. Feshki Farahani, H. R. Hafezi, D. Habibinia, A. R. Jalilian and A. Shoulaei, Investigation of unbalance supplying voltage on the thermal behavior of Squirrel Cage Induction motor using monitoring system, 2007 42nd International Universities Power Engineering Conference, Brighton, UK, 2007, pp. 210-216, doi: 10.1109/UPEC.2007.4468948.

B. Jha, Evaluation of voltage unbalance factor for the performance analysis of induction motor, 2015 39th National Systems Conference (NSC), Greater Noida, India, 2015, pp. 1-6, doi: 10.1109/NATSYS.2015.7489131.

D. M. Said, K. M. Nor and M. S. Majid, Analysis of distribution transformer losses and life expectancy using measured harmonic data, Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010, Bergamo, Italy, 2010, pp. 1-6, doi: 10.1109/ICHQP.2010.5625404.

H. Funato, C. Sasaki, Y. Chiku and S. Ogasawara, Analysis of loss of receiving transformer caused by harmonic current and voltage for loss reduction, Proceedings of 14th International Power Electronics and Motion Control Conference EPE-PEMC 2010, Ohrid, Macedonia, 2010, pp. S13-9-S13-14 ,doi: 10.1109/EPEPEMC.2010.5606663.

I. Iskender and A. Najafi, Evaluation of transformer performance under harmonic load based on 3-D time stepping finite element method, 2014 16th International Conference on Harmonics and Quality of Power (ICHQP), Bucharest, Romania, 2014, pp. 224-228, doi: 10.1109/ICHQP.2014.6842827.

J. B. Noshahr, M. Bagheri and M. Kermani, The Estimation of the Influence of Each Harmonic Component in Load Unbalance of Distribution Transformers in Harmonic Loading Condition, 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), Genova, Italy, 2019, pp. 1-6, doi: 10.1109/EEEIC.2019.8783488.

R. H. G. Tan and V. K. Ramachandaramurthy, Simulation of power quality events using simulink model, 2013 IEEE 7th International Power Engineering and Optimization Conference (PEOCO), Langkawi, Malaysia, 2013, pp. 277-281, doi: 10.1109/PEOCO.2013.6564557.

K. Yumak and O. Usta, A controversial issue: Power components in nonsinusoidal single-phase systems, 2011 7th International Conference on Electrical and Electronics Engineering (ELECO), Bursa, Turkey, 2011, pp. I-157-I-161.

J. A. Badri, J. -R. R. Ruiz, A. Garcia, S. Trujillo and A. Marzàbal, Predicting the Effect of Voltage Harmonic Phase Angle on Transformer Core Losses, in IEEE Transactions on Instrumentation and Measurement, vol. 73, pp. 1-9, 2024, Art no. 6008609, doi: 10.1109/TIM.2024.3449933.

P. Bagheri, W. Xu and K. Shaloudegi, New indices to evaluate the impact of harmonic currents on power transformers, 2018 18th International Conference on Harmonics and Quality of Power (ICHQP), Ljubljana, Slovenia, 2018, pp. 1-6, doi: 10.1109/ICHQP.2018.8378885.

J. A. Badri, J. -R. R. Ruiz, A. Garcia, S. Trujillo and A. Marzàbal, Predicting the Effect of Voltage Harmonic Phase Angle on Transformer Core Losses, in IEEE Transactions on Instrumentation and Measurement, vol. 73, pp. 1-9, 2024, Art no. 6008609, doi: 10.1109/TIM.2024.3449933.

D. Ahmadi, M. Tavakoli Bina and M. A. Golkar, Effects of distorted source on operating a Load-balancing transformer in a distribution network, 2010 18th Iranian Conference on Electrical Engineering, Isfahan, Iran, 2010, pp. 796-800, doi: 10.1109/IRANIANCEE.2010.5506966.

R. Sinvula, K. M. Abo-Al-Ez and M. T. Kahn, Design of Utility Harmonic Mitigation Filters for Power Transformers, 2020 IEEE PES/IAS PowerAfrica, Nairobi, Kenya, 2020, pp. 1-5, doi: 10.1109/PowerAfrica49420.2020.9219866.

Y. Li and P. A. Crossley, Voltage control on unbalanced LV networks using tap changing transformers, 11th IET International Conference on Developments in Power Systems Protection (DPSP 2012), Birmingham, UK, 2012, pp. 1-6, doi: 10.1049/cp.2012.0006.

S. S. Refaat, H. Abu-Rub, M. S. Saad, E. M. Aboul-Zahab and A. Iqbal, Detection, diagnoses and discrimination of stator turn to turn fault and unbalanced supply voltage fault for three phase induction motors, 2012 IEEE International Conference on Power and Energy (PECon), Kota Kinabalu, Malaysia, 2012, pp. 910-915, doi: 10.1109/PECon.2012.6450347.


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