Refine your search
Co-Authors
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Ahmad, Saood
- Assigning RF DC Transfer Difference to RF Voltage Primary Standard from 1 MHz to 1000 MHz
Abstract Views :187 |
PDF Views:0
Authors
Affiliations
1 LF & HF Voltage, Current and Microwave Standards, National Physical Laboratory, C. S. I. R., New Delhi, IN
1 LF & HF Voltage, Current and Microwave Standards, National Physical Laboratory, C. S. I. R., New Delhi, IN
Source
Manufacturing Technology Today, Vol 11, No 10 (2012), Pagination: 11-14Abstract
National Physical Laboratory (NPL) India is the premier research & development center and the National Metrology Institute (NMI), which provides traceability in measurements by calibration throughout the country. Radio frequency (RF) voltage is one of the important parameter in RF metrology. At NPLI the primary standard of RF Voltage at frequencies from 1 MHz to 1000 MHz is a twin resistance coaxial power mount. The calibration technique and the traceability in assigning the RF DC transfer difference to RF voltage primary standard are described in this paper This technique has been established for accurate measurement and characterization of twin resistance coaxial power mount by assigning RF DC transfer differences in terms of RF power, RF impedance and DC resistance. The calibrated results of the RF voltage primary standard have been discussed in this paper. The overall uncertainty in assigning RF DC transfer difference has been found to lie within 0.53% in the frequency range up to 1 GHz.Keywords
RF-DC Transfer Difference, RF Voltage, Standard, Calibration, Traceability, Effective Efficiency.
- Calibrated Phasor Measurement Unit as a Reliable Metrological Tool for National Power Grid Operation in India
Abstract Views :267 |
PDF Views:97
Authors
Affiliations
1 Indian Standard Time Division, CSIR-National Physical Laboratory, New Delhi 110 012, IN
1 Indian Standard Time Division, CSIR-National Physical Laboratory, New Delhi 110 012, IN
Source
Current Science, Vol 121, No 2 (2021), Pagination: 248-254Abstract
At the national power grid in India, stability is one of the most important factors due to disturbances caused by distributed load and time-variant sources. Presently, for monitoring the transmission efficiency and performance of power grids, phasor measurement units (PMUs) are being installed at various locations in the country. Time synchronization, using Coordinated Universal Time (UTC), makes PMU an important and reliable data acquisition equipment across the grids. To ensure reliability and accuracy of the acquired data, PMUs must be calibrated. However, recent development of automated PMU calibrator system by NIST and M/s Fluke, USA has revolutionized the calibration process by enhancing the accuracy and consistency of PMU measurements. The CSIR-NPL PMU system is fully operational to calibrate PMUs according to the IEEE synchrophasor standards. The time consumed to perform the PMU calibration is comparatively much less than the conventional method. A traceable PMU calibrator system has great potential in calibrating PMUs used to monitor, control and protect the power grid.Keywords
Calibration, National Power Grid, Phasor Measurement Unit, Synchrophasor, Time Synchronization, Uncertainty.Full Text
References
- North American Synchrophasor Initiative; http://www.naspi.org
- Zhang, P., Phasor Measurement Unit (PMU) Implementation and Applications, EPRI Report No. 1015511, Electric Power Research Institute, Palo Alto, California, 31 October 2007, p. 2–17; http://www.naspi.org/repository/project_details.aspx?pid=116
- NERC, NERC Real-Time Application of Synchrophasors for Improving Reliability, North American Electric Reliability Council, Princeton, New Jersey, 19 October 2010, p. 77.
- Staffs of the Federal Energy Regulatory Commission and North American Electric Reliability Corporation; Arizona – Southern California Outages on September 8, 2011, Causes and Recommendations, 27 April 2012.
- IEEE Standards Association, Power and Energy Society, Power Systems Relaying Committee, IEEE C37.118.1, Standard for Synchrophasor Measurements for Power Systems.
- IEEE Standards Association, Power and Energy Society, Power Systems Relaying Committee, IEEE C37.242, Guide for Synchronization, Calibration, Testing, and Installation of Phasor Measurement Units (PMU) for Power System Protection and Control.
- IEEE Standard for Synchrophasors for Power Systems. IEEE C37.118-2005.
- IEEE Standard for Synchrophasors Measurement for Power Systems. IEEE C37.118.1-2011.
- IEEE Standard for Synchrophasors Measurement for Power Systems, Amendment 1: Modification of Selected Performance Requirements, IEEE C37.118.1a-2014.
- IEEE Guide for Synchronization, Calibration, Testing, and Installation of Phasor Measurement Units (PMUs) for Power Systems Protection and Control, IEEE C37.242-2013.
- Pirret, R., New standards for test and calibration of phasor measurement units. In NCSL International Workshop and Symposium, Sacramento, California, USA, 2012, pp. 1–12.
- Fernandez, J. O., The Virginia Tech Calibration System, 2011, pp. 1–30.
- Narendra, K. et al., Calibration and testing of TESLA phasor measurement unit (PMU) using DOBLE F6150 test instrument, Bulk Power System Dynamics and Control-VII. Revitalizing Operational Reliability. In iREP Symposium, Charleston, SC, USA, 2007, pp. 1–13.
- Lin, Z. Z. et al., Dynamic performance test of single-phase phasor measurement units. In Power and Energy Society General Meeting, Michigan, USA, 2011, pp. 1–3.
- Komarnicki, P. et al., Practical experience with PMU system testing and calibration requirements. In Power and Energy Society General Meeting – Conversion and Delivery of Electrical Energy in the 21st Century, IEEE, 2008, pp. 1–5.
- Fluke 6135A/PMU Calibration System Operators Manual; http://us.flukecal.com/products/electrical-calibration/electrical-calibrators/6135-apmucal-phasor- measurement-unit-calibration
- Tang, Y. and Stenbakken, G. N., Traceability of calibration for phasor measurement unit. In Power and Energy Society General Meeting, San Diego, California, USA, 2012, pp. 1–5.