Timebase Offset Calibration of Analog-To-Digital Converters for Mains Frequency Measurement

The timebase inaccuracy of an Analog-to-Digital Converter (ADC) is an important systemic error to consider when it comes to fast and precise mains frequency measurement. In this paper, a new calibration method to determine the timebase offset of an ADC in real time to correct the mains frequency measurement is proposed and evaluated in tests. The methods uncertainty with regard to different calibration signal frequencies is assessed.

[1]  S. Kamalasadan,et al.  An approach for temperature and frequency control of a crystal oscillator , 2008, 2008 34th Annual Conference of IEEE Industrial Electronics.

[2]  K. Weiss,et al.  The modern OCXO quartz oscillators requirements and parameters , 2004, 6th International Conference on Laser and Fiber-Optical Networks Modeling, 2004. Proceedings of LFNM 2004..

[3]  Kenneth E. Martin,et al.  Synchrophasor Measurements Under the IEEE Standard C37.118.1-2011 With Amendment C37.118.1a , 2015, IEEE Transactions on Power Delivery.

[4]  Gerd Bumiller,et al.  Power Quality Measurement System With PMU Functionality Based on Interpolated Sampling , 2019, IEEE Transactions on Instrumentation and Measurement.

[5]  Mansi Vats,et al.  Application of phasor & frequency estimation techniques in phasor measurement unit , 2016, 2016 7th India International Conference on Power Electronics (IICPE).

[6]  Gerd Bumiller,et al.  Evaluation of Power Quality Measurement System Concept using an experimental setup , 2019, 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC).

[7]  Hui Zhou,et al.  Frequency Accuracy & Stability Dependencies of Crystal Oscillators , 2008 .

[8]  J. Hartung,et al.  Statistik: Lehr- und Handbuch der angewandten Statistik , 2009 .

[9]  Dario Petri,et al.  A Frequency-Domain Algorithm for Dynamic Synchrophasor and Frequency Estimation , 2014, IEEE Transactions on Instrumentation and Measurement.

[10]  Gerd Bumiller,et al.  Accuracy of Power Quality Measurement Based on Interpolated Sampling , 2018, 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe).