The Exploration of Capacitive Effects of XLPE Cables in Medium Voltage Distribution Systems

Yıl 2021, , 605 - 619, 31.08.2021

Salih Bilgiç , Cemile Bardak

https://doi.org/10.18185/erzifbed.949269

Öz

Cross-linked polyethylene insulation (XLPE) type underground power cables used in medium and low voltage distribution systems bring out a reactive effect with capacitive character due to the constructional properties of XLPE cables. If this effect is not eliminated, it causes negative influences on losses, cost, and capacity. Therefore, this study focuses on the capacitive effects of XLPE type underground cables and the appropriate compensation systems to overcome the issue on a medium voltage distribution system with 5500 m-length. The measurements taken from a medium voltage substation have been compared to corresponding simulation results. As a result, a very successful match between simulation and measurements has been achieved. Furthermore, a series of suggestions for establishing appropriate compensation has been presented, which is expected to serve the more efficient transmission and distribution of energy. Since the need for more energy and the amount of utilization are increasing, it is compulsory to carry out the works to decrease the loss rate of the transmission and distribution of energy.

Anahtar Kelimeler

XLPE type cables, compensation, capacitive effect, shunt reactor, MV distribution network

XLPE Kabloların Orta Gerilim Dağıtım Sistemlerinde Kapasitif Etkisinin İncelenmesi

Öz

Orta ve alçak gerilim dağıtım sistemlerinde kullanılan çapraz bağlı polietilen yalıtım (XLPE) tipi yeraltı güç kabloları, yapısal özellikleri nedeniyle kapasitif karakterli reaktif bir etki oluştururlar. Bu etki ortadan kaldırılamazsa, kayıplar, maliyetler, ve kapasite üzerinde olumsuz etki oluşturur. Bu nedenle, bu çalışma 5500 m uzunluğunda bir orta gerilim dağıtım sistemindeki XLPE tipi yeraltı kablolarının kapasitif etkilerine ve bu etkilerin üstesinden gelebilmek için uygun kompanzasyon sistemlerine odaklanmaktadır. Orta gerilim trafo merkezinden alınan ölçümler, simülasyon sonuçlarıyla karşılaştırılmıştır. Sonuç olarak, simülasyon ve ölçümler arasında çok başarılı bir eşleşme sağlanmıştır. Ayrıca, daha verimli enerji iletimi ve dağıtımına hizmet etmesi beklenen uygun kompanzasyonun oluşturulmasına yönelik bir dizi öneri sunulmaktadır. Daha fazla enerji ihtiyacı ve kullanım miktarı arttığı için enerjinin iletim ve dağıtımındaki kayıp oranını azaltacak çalışmaların yapılması gereklidir.

Anahtar Kelimeler

XLPE kablo, kompanzasyon, kapasitif etki, şönt reaktör, orta gerilim dağıtım şebekesi

Kaynakça

• Ahmad, T., & Zhang, D. (2020). A critical review of comparative global historical energy consumption and future demand: The story told so far. Energy Reports, 6, 1973–1991. https://doi.org/https://doi.org/10.1016/j.egyr.2020.07.020
• HES Kablo. (1390). HES Kablo Enerji Katalog. Retrieved June 7, 2021, from https://www.hes.com.tr/assets/doc/Enerji_Katalog.pdf
• Hoogendorp, G. (2016). Steady State and transient behavior of underground cables in 380 kV transmission grids. https://doi.org/10.4233/uuid:2ecf0e07-58c8-42b9-bbf1-67878a3f6018
• Janning, J., & Bocquel, A. (2005). Multi-level medium voltage inverters for reactive power and harmonic compensation. In 2005 European Conference on Power Electronics and Applications (Vol. 2005). IEEE Computer Society. https://doi.org/10.1109/epe.2005.219468
• Liu, Y., Zhang, S., Cao, X., Zhang, C., & Li, W. (2018). Simulation of electric field distribution in the XLPE insulation of a 320 kV DC cable under steady and time-varying states. IEEE Transactions on Dielectrics and Electrical Insulation, 25(3), 954–964. https://doi.org/10.1109/TDEI.2018.006973
• Malik, N. H., Pazheri, F. R., Al-Arainy, A. A., & Qureshi, M. I. (2014). Analytical Calculation of AC and DC Electric Field Distribution at High Voltage Cable Terminations. Arabian Journal for Science and Engineering, 39(4), 3051–3059. https://doi.org/10.1007/s13369-013-0939-9
• Popović, L. M. (2020). Inductive influence of surrounding metal installations on power transfer capacity of HV cable lines with applied cross-bonding. International Journal of Electrical Power and Energy Systems, 120. https://doi.org/10.1016/j.ijepes.2020.105963
• Ra, N., Mustafa, N. S. B., Kawashima, T., Murakami, Y., & Hozumi, N. (2019). Development of a Partial Discharge Measuring Method for a Long-Distance Cable Line. IEEJ Transactions on Electrical and Electronic Engineering, 14(7), 996–1001. https://doi.org/10.1002/tee.22894
• Santos, M., & Calafat, M. A. (2019). Dynamic simulation of induced voltages in high voltage cable sheaths: Steady state approach. International Journal of Electrical Power and Energy Systems, 105, 1–16. https://doi.org/10.1016/j.ijepes.2018.08.003
• Schönleber, K., Collados, C., Pinto, R. T., Ratés-Palau, S., & Gomis-Bellmunt, O. (2017). Optimization-based reactive power control in HVDC-connected wind power plants. Renewable Energy, 109, 500–509. https://doi.org/10.1016/j.renene.2017.02.081
• Shekhar, A., Kontos, E., Ramírez-Elizondo, L., Rodrigo-Mor, A., & Bauer, P. (2017). Grid capacity and efficiency enhancement by operating medium voltage AC cables as DC links with modular multilevel converters. International Journal of Electrical Power and Energy Systems, 93, 479–493. https://doi.org/10.1016/j.ijepes.2017.06.012
• Thomas, H., Marian, A., Chervyakov, A., Stückrad, S., Salmieri, D., & Rubbia, C. (2016). Superconducting transmission lines - Sustainable electric energy transfer with higher public acceptance? Renewable and Sustainable Energy Reviews, 55, 59–72. https://doi.org/10.1016/j.rser.2015.10.041
• Turkish Electricity Transmission Corporation. (n.d.). Retrieved June 7, 2021, from https://www.teias.gov.tr/
• Werelius, Peter, Holmgren, B., & Gafvert, U. (1998). Diagnosis of medium voltage XLPE cables by high voltage dielectric spectroscopy. In IEEE International Conference on Conduction & Breakdown in Solid Dielectrics (pp. 79–84). https://doi.org/10.1109/icsd.1998.709231
• Yu, Q., Li, X., Zhang, P., Yang, P., & Chen, Y. (2019). Properties of Water Tree Growing in XLPE and composites. In ICEMPE 2019 - 2nd International Conference on Electrical Materials and Power Equipment, Proceedings (pp. 409–412). Institute of Electrical and Electronics Engineers Inc. https://doi.org/10.1109/ICEMPE.2019.8727376