About Communications       Author's Guide       Reviewers       Editorial Members       Archive
Volume 8
Volume 7
Volume 6
Volume 5
Volume 4
Volume 3
Volume 2
Volume 1
AASCIT Communications | Volume 5, Issue 3 | Jan. 27, 2019 online | Page:37-47
Mitigation and Analysis of Very Fast Transient over Voltages (VFTOs) in 765/245kV Gas Insulated Substation (GIS) by Wavelet Transforms
The very fast transient over voltages (VFTO) can cause the stress on insulation and may leads to damage of the insulation. If the maximum peak value of VFTOs is more than the rated lighting impulse withstand voltage then it is necessary to consider the VFTO and mitigation has to be done by employing suitable damping devices. In this paper a power transformer rating of 400MVA has been considered in 765/245kV, gas insulated substation. The parameters of the proposed system have been evaluated using very fast transient nature (VFT) for more accurate evaluation. In this work, the effect of earthing switch and Influence of grid grounding on VFTOs and TEV wereinvestigated. The wavelet transform have employed for the estimation of VFTOs and TEV since the wavelet transform is most powerfull tool fortransient analysis.
Krishaniah Prakasam, Department of Electrical and Electronics Engineering, Sreekavitha Engineering College, Khammam, India.
Munagala Surya Kalavathi, Department of Electrical and Electronics Engineering, Jawaharlal Nehru Technological University, Hyderabad, India.
Dantla Prabhavathi, Department of Electrical and Electronics Engineering, Jawaharlal Nehru Technological University, Khammam, India.
Disconnector, Transients, Surges, Vftos, Tev, Wavelet
Bi. Tiechen, Lu., Zhang, “Calculation of Very Fast Transient Overvoltage in GIS”, IEEE/PES Conference on Transmission and Distribution, Vol. 4, 2005.
Kamakshaiah.,“Simulation and measurement of very fast transient over voltages in a 245kvgis and research on suppressing method using ferrite rings” ARPN Journal of Engineering and Applied Sciences, vol. 5, No. 5, 88- 95, 2010.
V. Vinod Kumar, Joy. M. Thomas and M. S. Naidu, “VFTO Computation in a 420kV GIS”, Eleventh International Symposium on High Voltage Engineering, (Conf. Publ. No. 467), pp. 319-32, 199.
S. A. Boggs, F. Y. Chu and N. Fujimoto‘Disconnect Switch Induced Transients and Trappedcharge in GIS’, IEEE Transactions on Power Apparatus and Systems, Vol. PAS-101, pp. 3593-3596, 1998.
Y. Shibuya, S. Fuji, andN. Hosokawa, “Analysis of very fast transient over voltage intransformer winding”, IEE Proc. Generation transmission and distribution, Vol. 144, No. 5, pp461-46, 1997.
H. NobuhiroShimoda, I., Murase, and H. Oshima, Aoyagi, I., Miwa, "Measurement of transient voltages induced by disconnect switch operation", IEEE Transactions on Power Apparatus and Systems, PAS-104NO. 1, 1985.
J. A. P. Martinezm R. Iravani, A. Keri and D. Povh (1998)” Modeling guidelines for very fast transients in Gas Insulated substations”, IEEE working group modeling and analysis of system transients, Vol. 11, no. 4, pp 2028-2047
N. Hosokawa, ‘Very fast Transient Phenomena associated with Gas Insulated Substations’, CIGRE, pp. 33-13, 1996.
S. Cariimavoid and R. Mahmutdehajid, “More accurate modeling of Gas insulated componentsin digital simulations of very fast transients”, IEEE Transactions on Power delivery, Vol. 7, NO. 1, pp. 434-441, 1963.
R. Witzman ‘Fast Transients in Gas Insulated substations – Modeling of Different GIS components’, Fifth ISH, Braunschweig,. WorkingGroup33. Pp. 13-09, ‘Very Fast Transient Phenomenon Associated With GIS, CIGRE, 1998.
U. Riechert, Krüsi and D. Sologuren-Sanchez, “Very Fast Transient Overvoltage’s during Switching of Bus-Charging Currents by 1100 kV Disconnector”, CIGRÉ Report A3-107, 43rd CIGRÉ Session, pp. 22-27, 2010
S. Burow, U. Riechert, W. Köhler and S. Tenbohlen, “New mitigation methods for transient overvoltages in gas insulated substations”. 2013.
J. Meppelink, K. Diederich, K. Feser (SM), W. Pfaff, “Very Fast Transients in GIS” IEEE Transactions on Power Delivery, Vol. 4, No. 1, January 1989. PP125-131.
Working Group 33/13-09 (1988), 'Very Fast Transient Phenomenon Associated with Gas Insulated Substations', CIGRE
N. Fujimoto, E. P. Dick, S. A. Boggs and G. L. Ford, "Transient ground potential rise in gas-insulated substations - Experimental studies", IEEE Trans. On Power Apparatus and Systems, vol. 101, no. 6, pp. 3603-3609, October 1982.
Boggs SA., Chu F. Y. and Pujimotor N. (1982), 'Disconnect Switch Induced Transients and Trapped Charge in GIS', EEE Trans. PAS, Vol. PAS-101, No. 10, PP3593-3601.
Y. L. Chow, M. M. A. Salama, “A Simplified Method for Calculating the Substation Grounding Grid Resistance”, IEEE Transactions on Power Delivery, Vol. 9, No. 2, pp736-742, April 1994. [6]. “Inductance Calculations” Working formula and Tables, FREDERICK W. GROVER, 26TH Edition.
Arcticle History
Submitted: Feb. 3, 2018
Accepted: Aug. 2, 2018
Published: Jan. 27, 2019
The American Association for Science and Technology (AASCIT) is a not-for-profit association
of scientists from all over the world dedicated to advancing the knowledge of science and technology and its related disciplines, fostering the interchange of ideas and information among investigators.
©Copyright 2013 -- 2019 American Association for Science and Technology. All Rights Reserved.