The Transient Performance of Partially-Undergrounded Overhead Lines in the Presence of Corona

• Autorzy: Saied Mohamed M.
• Języki publikacji: EN

Abstrakty

EN

The paper presents a method for investigating the electromagnetic transients of partially under-grounded high voltage overhead transmission lines in the presence of corona. It is based on a time domain model in which the corona is simulated by distributed voltage-dependent shunt current sources. The line segments and the inserted cable section are represented by a single equivalent transmission element having location-dependent circuit parameters per unit length. The numerical solution of the resulting set of differential equations yields the distributions of the voltage, the longitudinal current and the shunt corona current (per unit length) as functions of location and time. The presented two-, three-dimensional and contour plots proved to be helpful in discussing these distributions and in identifying any eventual current and/or voltage concentrations. The developed computer code in Mathematica can handle any time waveform of the source initiating the transients, any line termination as well as any lengths of the overhead line and cable section.

Słowa kluczowe

EN

distributed parameter circuits; non-uniform lines; power transmission lines; line modeling; transients; power networks; mixed; overhead-cable lines; partial undergrounding; distributions; mathematica

• Wydawca: AGH University of Science and Technology ; Lodz University of Technology
• Czasopismo: Electrical Power Quality and Utilisation. Journal
• Rocznik: 2019
• Tom: Vol. 21, iss. 1
• Strony: 1--8
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Saied Mohamed M.

Bibliografia

• 1. Saied M., Safar Y., Salama M. : Line Transients with Corona. J. of the University of Kuwait (Science), vol. 14, no. 1, Jan. 1987.
• 2. Safar Y., Saied M. : A model for simulating corona in the electromagnetic transients on transmission lines. J. Computers and Electrical Engineering, vol. 29, issue 6, pp. 653-665, Aug. 2003.
• 3. Saied M., Safar Y.A.: Electromagnetic transients on compensated lines under corona. Electric Machines and Power Systems, vol. 16, no. 6, pp. 441-462, 1989, DOI:10.1080/07313568908909401
• 4. Naredo J., Soudack A,, Marti J. : Simulation of Transients on Transmission Lines with Corona via the Method of Characteristics. IEE Proc Generat Transm Distrib, vol. 142, no.1, pp. 81-85, Jan. 1995.
• 5. Saied M. : Corona Modeling for the Transient Analysis, Steady State and Corona Loss Performance of Transmission Lines. Electrical Power Quality and Utilization J., vol. 16, no. 2, pp. 11-20, Dez. 2013.
• 6. Saied M. : Effect of Cable Sections on the Electromagnetic Transients in Power Networks. Electric Machines and Power Systems, vol. 15, no. 1, pp. 17-35, 1988.
• 7. Saied M.: The Frequency Characteristics of Mixed Power Networks with Partial Undergrounding. International J. of Power and Energy Research, vol. 1, no. 2, pp. 117-130, July 2017, DOI: 10.22606/ijper.2017.12004.
• 8. Saied M.: The Electromagnetic Transients in Mixed Power Networks with Partial Undergrounding. J. of Power Electronics and Power Systems, vol. 7, no. 2, pp. 1-13, 2017.
• 9. Saied M. : Modifying the Transient Overvoltages in Mixed Power Networks by Inserting Cable Sections. Electrical Power Quality and Utilization J., vol. 18, no. 1, pp. 7-14, Jun. 2015.
• 10. Khalilnezhad H. , Popov M. , L . van der Sluis, J. de Jong, N. Nenadovic N. , Bos J. A.: Assessment of Line Energization Transients when Increasing Cable Length in 380 kV Power Grids. 2016 IEEE International Conference on Power Systems Technology, Sept. 28-Oct. 01, 2016, available online at https://www.researchgate.net/publication/309618106_Assessment_of_Line_Energization_Transients_when_Increasing_Cable_Length_in_380_kV_Power_Grids.
• 11. Khalilnezhad H. , Popov M. , Bos J. A. , de Jong J. P. W. , L. van der Sluis : Investigation of Statistical Distribution of Energization Overvoltages in 380 kV Hybrid OHLCable Systems. Proc. The Int. Conf. on Power Systems Transients (IPST2017), Seoul, Republic of Korea, available online at https://www.researchgate.net/publication/318225765_Investigation_of_Statistical_Distribution_of_Energization_Overvoltages_in_380_kV_Hybrid_OHL-Cable_Systems.
• 12. Khalilnezhad H. , Popov M. , L. van der Sluis, Bos J. A., Ametan i A. : Statistical Analysis of Energization Overvoltages in EHV Hybrid OHL-Cable Systems. IEEE Trans. Power Del., vol. 33, no. 6, pp. 2765-2775, Dec. 2018.
• 13. Greenwood A. : Electrical Transients in Power Systems, 2nd ed., Wiley-Interscience, 1991, ch. 9.