Electric network equivalenting in the presence of high harmonics
- 1 — professor, rector Institute of Mining and Metallurgy
- 2 — Ph.D. assistant lecture National Mineral Resources University (Mining University)
- 3 — Ph.D. assistant lecture National Mineral Resources University (Mining University)
Abstract
The article deals with equivalenting of complex electrical networks of industrial enterprises. In the article the different methods of averaging equivalenting elements in power systems are compared, specifically, the method of moments, the equivalent section method, and the average value method. The current value of the capacitor bank as part of the electrotechnical complex of the enterprise is the main criterion for determining the equivalenting error of the electric network. The equivalenting in the presence of high harmonics in electrical networks of the enterprise is considered by applying the methods under discussion. Comparison of these equivalenting methods in the presence of high harmonics shows that the error in the calculation of capacitor bank current ranges from 3,8 to 14,7 %. In addition, the most accurate method for determining the capacitor bank overload is the method of moments.
References
- Коровченко П.В. Эквивалентирование нагрузки в зависимости от спектра высших гармоник / П.В.Коровченко, А.Н.Скамьин // Альтернативная энергетика и экология. 2014. № 2. С.56-59.
- Скамьин А.Н. Повышение эффективности функционирования конденсаторных батарей в электрической сети горного предприятия // Записки Горного института. 2011. Том 189. С.107-110.
- Шклярский Я.Э. Снижение уровня высших гармоник в сетях промышленного предприятия / Я.Э.Шклярский, А.Н.Скамьин // Промышленная энергетика. 2012. № 8. С.44-47.
- Andersson G. Modeling and Analysis of Electric Power Systems / EEH – Power Systems Laboratory. ETH Zurich. September 2008, 183 p.
- Mahanty R., Kapoor A.K. Quasi-passive filter for harmonic filtering. Electric Power Systems Research (78). 2008, р.1456-1465.
- Rios S., Naranjo A., Escobar A. Modeling of electrical systems in the presence of harmonics. IEEE Transactions on Power Systems (IX, 22). 2003, р.987-993.
- Saša Vlahinić, Dalibor Brnobić, Dubravko Vučetić. Measurement and analysis of harmonic distortion in power distribution systems. Electric Power Systems Research. Vol.79, Issue 7. 2009, р.1121-1126.