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Vasudev, N.
- Effect of Biocontamination on Polymer Insulators
Abstract Views :189 |
PDF Views:0
Authors
M. N. Dinesh
1,
V. Krishnan
2,
N. Vasudev
3,
K. N. Ravi
4,
P. V. Vasudevan Nambudri
3,
K. Suryanarayana
4
Affiliations
1 Department of EEE , R.V. College of Engineering , Bengaluru, IN
2 Department of EEE , M.S. Ramaiah Institute of Technology, Bengaluru, IN
3 Central Power Research Institute, Bengaluru, IN
4 Department of EEE, Sapthagiri College of Engineering, Bengaluru, IN
1 Department of EEE , R.V. College of Engineering , Bengaluru, IN
2 Department of EEE , M.S. Ramaiah Institute of Technology, Bengaluru, IN
3 Central Power Research Institute, Bengaluru, IN
4 Department of EEE, Sapthagiri College of Engineering, Bengaluru, IN
Source
Power Research, Vol 4, No 2 (2008), Pagination: 149-154Abstract
No Abstract.Keywords
No Keywords.
- Impact of Ultraviolet Radiation on an Artifi cially Polluted Silicone Rubber during Inclined Plane Tracking Test
Abstract Views :188 |
PDF Views:0
Authors
Affiliations
1 Central Power Research Institute, Bangalore-560080, IN
1 Central Power Research Institute, Bangalore-560080, IN
Source
Power Research, Vol 8, No 3 (2012), Pagination: 191–198Abstract
This paper presents experimental results obtained on tracking and erosion resistance of Silicone rubber (SIR) with and without pollutants. The IEC-60587 Inclined Plane Tracking and Erosion Test method combined with UV radiations of different intensities was employed to assess two different formulations with same base polymeric material (SIR). The hydrophobicity recovery property of silicone rubber formulations before and after inclined plane tracking test was studied besides the effect of corona. Some of the physical, thermal and electrical properties were compared before and after inclined plane tracking test. It is inferred from the analysis carried out on the experimental results that the intensity of UV radiation plays a major role in deteriorating the surface characteristics of the material. It is also found that the introduction of UV in the test method has helped in distinctly evaluating polymeric materials. The effect of two different pollutants was not the same on formulations considered for the study, which implies that the additives play a dominant role in the overall performance of the material than the base polymer. The study also revealed that a formulation with a better performance under a certain pollutant need not have to behave the same way under a different pollutant. Presently, CIGRE Working Group (WG D1.14) is active in standardization of material aspects besides developing suitable methodology for the testing of polymeric materials for outdoor insulation application; the inferences appear to be an useful input to both CIGRE working group and International Electro technical Committee (IEC TC 15 PT 2).Keywords
Inclined plane tracking IEC 60587, UV radiation, Silicone rubber, Pollutant- Application of Line Surge Arresters for Switching Over-voltages in UHV Transmission Systems
Abstract Views :349 |
PDF Views:0
Authors
Affiliations
1 Vijaya Sales Corporation, #49, 4th Cross Small Scale Industrial Area, Rajajinagar, Bengaluru – 560010, Karnataka, IN
2 Power Systems Division, Central Power Research Institute, Bengaluru – 560080, Karnataka, IN
3 Manobhu Technologies, Bengaluru – 560010, Karnataka, IN
1 Vijaya Sales Corporation, #49, 4th Cross Small Scale Industrial Area, Rajajinagar, Bengaluru – 560010, Karnataka, IN
2 Power Systems Division, Central Power Research Institute, Bengaluru – 560080, Karnataka, IN
3 Manobhu Technologies, Bengaluru – 560010, Karnataka, IN
Source
Power Research, Vol 16, No 2 (2020), Pagination: 87-93Abstract
Switching Overvoltages (SOV) are critical for systems operating at Ultra High Voltage (UHV) level. Pre-insertion resistors (PIR) are usually used to suppress the switching overvoltages in UHV systems. PIR are effective in suppressing SOV’s, but their shortcomings prompt utilities to explore other protection schemes. In this paper, the application of Line Surge Arresters (LSA) to suppress switching over voltages is studied. The statistical overvoltage analysis is carried out for a typical UHV system to compute the highest overvoltage magnitudes. The location and number of LSA’s to be placed along the transmission line are decided based on the overvoltage profile along the line, observed during switching operations. The switching impulse withstand values of the equipment are calculated for proposed non-gapped line arrester arrangements and also compared with the withstand values for conventional system. The energy absorbed by the LSA’s when placed along the transmission line is also observed. The simulations are performed using Electro-Magnetic Transient Program for the 1200 kV Indian transmission system. The results of this study show that the LSA’s can be considered an alternate protection measure to suppress SOV’s in a UHV system.Keywords
Co-Ordinations, EMTP, Insulation, Switching Over-voltage, Transient, Ultra High Voltage.References
- Cigre Working Group A3.22. Technical requirements for substation equipment exceeding 800 kV (CIGRE, 2008).
- Nayak RN, Bhatnagar MC, De BBN, et al. 1200kv transmission system and status of development of substation equipment/transmission line material in India. Proceedings Second International Symposium on Standards for Ultra High Voltage Transmission, New Delhi, India; 2009. p. 1–13.
- Bhurat P, Vasudev N, Meera KS. Surge arresters for ultra high voltage transmission system - A review. Proceedings 2016 International Conference on Electrical Power and Energy Systems (ICEPES), Bhopal, India; 2016. p. 295–300. https://doi.org/10.1109/ICEPES.2016.7915946
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- Uglesic I, Filipovic-Grcic B, Bojic S. Transients caused by uncontrolled and controlled switching of circuit breaker. The International Symposium on High Voltage Technique “Hofler’s Days”, Portoroz, Slovenia; 2013.
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- He J, Zhou Y, Li Z, et al. Feasibility of using one-column- varistor arresters in 1000-kv UHV substations. IEEE Transactions on Power Delivery. 2016; 31(4):1533–41. https://doi.org/10.1109/TPWRD.2015.2476500
- Filipovic-Grcic B, Uglesic I, Pavic I. Application of line surgearresters for voltage uprating and compacting of overhead transmission lines. Electric Power Systems Research. 2016; 140:830–35. https://doi.org/10.1016/j.epsr.2016.04.023
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- Yang P, Chen S, He J. Effect of different arresters on switching overvoltages in UHV transmission lines. Tsinghua Science and Technology. 2010; 15(3):325–8. https://doi. org/10.1016/S1007-0214(10)70069-9
- Bharti S, Dubey SP. No-load performance study of 1200 kV Indian UHVAC transmission system. High Voltage. 2016; 1(3):130–7. https://doi.org/10.1049/hve.2016.0036
- IEC 60071-2: Insulation co-ordination part 2: Application guide; 1996.
- German DM, Haddad A. Overvoltages and insulation co-ordination on transmission networks. Advances in High Voltage Engineering (1st edn.); 2014. p. 309–45. https://doi.org/10.1049/PBPO040E_ch7
- A Study on the Development of New Silicone based Polymeric Outdoor Insulator Material for Enhanced Properties
Abstract Views :130 |
PDF Views:0
Authors
Affiliations
1 University College of Engineering Kakinada, Kakinada – 533003, Andhra Pradesh, IN
2 Associate professor of EEE, UCEK, Kakinada – 533003, Andhra Pradesh, IN
3 Manobhu Technology Pvt Ltd, Bangalore – 560010, Karnataka, IN
1 University College of Engineering Kakinada, Kakinada – 533003, Andhra Pradesh, IN
2 Associate professor of EEE, UCEK, Kakinada – 533003, Andhra Pradesh, IN
3 Manobhu Technology Pvt Ltd, Bangalore – 560010, Karnataka, IN
Source
Power Research, Vol 18, No 2 (2022), Pagination: 101-111Abstract
Polymeric insulators have been increasingly popular in recent years as a result of their superior performance in contaminated environments due to their hydrophobic properties. However, research into the ageing condition of polymeric materials and their practicality for large-scale use is currently ongoing. Insulator deterioration is caused by environmental tracking and erosion factors. As insulators age, they develop immature failures and inconsistencies in their functioning. pollution performance of polymeric insulators is a vital factor in the quality and reliability of the power system. Over some time, dry band arcing can initiate the flashover and it causes degradation in the form of erosion and tracking. Polymeric insulators’ performance is heavily influenced by the constituent materials and their properties. There is a critical need to investigate innovative filler materials that can be combined with existing polymeric base materials to form composites. In this context the proposed research use silicone rubber as a base polymeric material, to which additives are added to produce three distinct composites by varying the filler concentration. Preliminary studies were made to evaluate the hydrophobicity, dielectric strength, hardness, specific gravity, tensile strength, ultimate elongation and tear strength properties of this HTV silicone rubbed-based composites by using ASTM standards and IEC 60587 requirements. Studies were also made by accelerated ageing on sample material by using the IPTE test. The results show substantial improvement in the electrical and ageing propertiesKeywords
Ageing, Dielectric Strength, Filler Material, Hardness, Inclined Plane Tracking and Erosion, Recovery of Hydrophobicity, Specific Gravity, Tear Strength, Tensile Strength, Ultimate ElongationReferences
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- History of composite insulators. Hoechst CeramTec Communique, Wunsiedel 05.06.1990. V/H-Dr.Ki/GO; 1990.
- Hall JF. History and bibliography of polymeric insulators for outdoor applications. IEEE Transactions on Power Delivery. 1993; 8(1):376-385. https://doi.org/10.1109/61.180359 DOI: https://doi.org/10.1109/61.180359
- Ehsani M, Borsi H, Gockenbach E, Bakhshandeh Gr, Morshedian J. Improvement of electrical, mechanical and surface properties of silicone insulators. CEIDP. 2004 Annual Report. Boulder, USA; 2004. p. 623-626.
- Hackam R. Outdoor HV composite polymeric insulators. IEEE Transactions on Dielectrics and Electrical Insulation. 1999; 6(5):557-585. https://doi.org/10.1109/ TDEI.1999.9286745 DOI: https://doi.org/10.1109/94.798114
- Looms JST. Insulators for high voltage. London, United Kingdom: Peter Peregrinus Ltd; 1990.