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Aravind, K. A.
- End-of-Life Evaluation of RTV Coated Porcelain and Glass Insulators under Pollution Conditions
Abstract Views :179 |
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Authors
Affiliations
1 JNTU, Hyderabad, IN
2 CPRI, Hyderabad, IN
3 CPRI, Bengaluru, IN
1 JNTU, Hyderabad, IN
2 CPRI, Hyderabad, IN
3 CPRI, Bengaluru, IN
Source
Power Research, Vol 5, No 1 (2009), Pagination: 9-15Abstract
Ageing of Room Temperature Vulcanising (RTV) silicone rubber coated porcelain and glass disc insulators are reported under combined voltage stress and salt-fog conditions till the loss of hydrophobic properties of RTV coating in an ageing chamber. The electrical characteristics are obtained by online monitoring of leakage current and material characteristics are analysed by Energy Dispersive X-Ray (EDX) analysis. RTV coated glass insulators shattered into pieces after 2600 hours of ageing while RTV coated porcelain after ageing for 4600 hours lost its hydrophobic properties and started behaving like a normal un-coated porcelain disc insulator.Keywords
No Keywords.
- Commissioning of UHV Indoor Double Shielded Laboratory for Radio Interference Voltage and Partial Discharge Measurement
Abstract Views :299 |
PDF Views:1
Authors
Affiliations
1 Ultra High Voltage Research Laboratory, Central Power Research Institute, Hyderabad – 500098, Telangana, IN
1 Ultra High Voltage Research Laboratory, Central Power Research Institute, Hyderabad – 500098, Telangana, IN
Source
Power Research, Vol 15, No 2 (2019), Pagination: 145-152Abstract
In recent years, due to advancement of technology, the transmission voltage levels are goes on increasing. Worldwide 800 kV systems is very common and in India experimental 1200 kV AC is successfully commissioned. Testing of vital equipment of such UHV transmission network is paramount importance to provide uninterrupted, reliable and quality power to the customers. Worldwide few testing laboratories having facility to test upto UHV class equipment, the Ultra High Voltage Research Laboratory (UHVRL) of Central Power Research Institute (CPRI), India is one among them. Recently, 2X600 kV, 2 A, 2400 kVA HVAC test system is commissioned in double shielded indoor laboratory at UHVRL, Hyderabad, India. This manuscript elaborates the experiences of commission of AC test system along with radio interference voltage and Partial Discharge (PD) measurement.Keywords
Double Shielded Indoor Laboratory, Performance Test on AC Test System, PD Measurement, UHVAC Test System.References
- Transmission line overview. Available from: http://tloverview.blogspot.com/2016/08/the-1200-kv-uhvacpowersystem.html
- IEC 60060-1. High voltage test techniques, Part-1: General definitions and test requirements.
- IEC 60060-2. High voltage test techniques, Part-2: Measuring system.
- IEC 60052. Voltage measurement by means of standard airgap.
- CISPR 16-1-1. Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-1: Radio disturbance and immunity measuring apparatus Measuring apparatus.
- IEC 60270. High voltage test techniques - partial discharge measurement.
- IEC 61869-1. Instrument Transformer - General requirements.
- Measurement of Electric and Magnetic Field Strengths under 765 kV UHVAC Single Circuit Transmission Line
Abstract Views :83 |
PDF Views:0
Authors
Affiliations
1 UHV Research Laboratory, Central Power Research Institute, Hyderabad – 500098, Telangana, IN
1 UHV Research Laboratory, Central Power Research Institute, Hyderabad – 500098, Telangana, IN
Source
Power Research, Vol 17, No 1 (2021), Pagination: 23-29Abstract
Transmission line corridors of developing countries are increasingly dense and expensive with construction of new ultrahigh voltage (UHV) transmission lines. Right of way of transmission line in the corridor, construction cost of transmission lines including towers, is directly influenced by electric and magnetic field strength emission (EMF) of that line. In UHV range, emission of electric and magnetic field strength in the vicinity of lines is of great public concern, as are likely to have hazardous effects to human being when their exposure level exceeds specified limits. Higher the transmission voltage and stronger the electric field. Though the results on effect of EMF on human being is inconclusive, to create awareness to common public and working professional, it is mandatory to measure the emission level of EMF in lateral and longitudinal profile. This paper reports experiences of EMF emission measurement of 765 kV UHVAC quadruple ACSR bundled conductor single circuit transmission line in India. Measurement results of EMF with vegetation is reported.Keywords
EMF Measurement, Electric Field Strength Measurement, Magnetic Field Strength Measurement and 765 kV Transmission Line .References
- International Commission on Non-Ionizing Radiation Protection, ICNIRP guidelines for limiting exposure to time-varying electric and magnetic fields (1HZ - 100 kHZ). Health Physics. 2010; 99(6):818–36. https://doi.org/10.1097/HP.0b013e3181f06c86. PMid:21068601
- IEEE Std. 644. IEEE Standard Procedures for Measurement of Power Frequency Electric and Magnetic Fields from AC Power Lines; 1994.
- Narda Safety Test Solutions, Electric and magnetic field probe-analyzer, from 1 Hz up to 400 kHz, EHP-50 User’s manual; 2018.