Simple method of fundamental reactive power measurement for ASIC application

This study presents a simple method for measuring the fundamental reactive power concurrently with the other basic power components defined in IEEE Standard 1459-2010. The method has low hardware requirements and is suitable for implementation in low cost devices, e.g. application-specific integrated circuits (ASICs). The algorithm is based on voltage samples that are shifted by a constant number that represents one-quarter of the rated period. The impact of instantaneous frequency variations on the measurement is mitigated by a sine function Taylor expansion. The algorithm is described in detail and the results of an experimental investigation are presented, which consisted of simulations and laboratory research into known testing signals. Next, the method was applied to an actual microgrid with fluctuating load and a high level of distortion, and the results were compared to those of the reference methods. The results confirm the usefulness of the proposed solution for the measurement of power flows in power systems, including highly disturbed ones.

[1]  Salvatore Nuccio,et al.  A DAQ-based sampling wattmeter for IEEE Std. 1459-2010 powers measurements. Uncertainty evaluation in nonsinusoidal conditions , 2015 .

[2]  Tomasz Tarasiuk.  Angular frequency variations at microgrids and its impact on measuring instruments performance , 2016 .

[3]  Miodrag D. Kusljevic,et al.  Power Components Estimation According to IEEE Standard 1459–2010 Under Wide-Range Frequency Deviations , 2012, IEEE Transactions on Instrumentation and Measurement.

[4]  Andrew J Berrisford.  New technology and power definitions make accurate revenue metering possible in the presence of harmonic distortion , 2009, 2009 IEEE Electrical Power & Energy Conference (EPEC).

[5]  M. Smith,et al.  Key Connections: The U.S. Department of Energy?s Microgrid Initiative , 2013 .

[6]  Lorenzo Peretto,et al.  The Effect of the Integration Interval on the Measurement Accuracy of RMS Values and Powers in Systems with Nonsinusoidal Waveforms , 2006 .

[7]  Jose Carlos Alfonso-Gil,et al.  Measurement System for a Power Quality Improvement Structure Based on IEEE Std.1459 , 2013, IEEE Transactions on Instrumentation and Measurement.

[8]  J.G. Anderson,et al.  History of Electrical Engineering , 1991, IEEE Power Engineering Review.

[9]  Kun Yang,et al.  A single-phase energy metering SoC with IAS-DSP and ultra low power metering mode , 2011, SOCC 2011.

[10]  Miodrag D. Kusljevic,et al.  Simultaneous Frequency and Harmonic Magnitude Estimation Using Decoupled Modules and Multirate Sampling , 2010, IEEE Transactions on Instrumentation and Measurement.

[11]  Giovanni Bucci,et al.  Embedded Power and Energy Measurement System Based on an Analog Multiplier , 2013, IEEE Transactions on Instrumentation and Measurement.

[12]  I. Kamwa,et al.  Extended C37.118.1 PMU Algorithms for Joint Tracking of Fundamental and Harmonic Phasors in Stressed Power Systems and Microgrids , 2014, IEEE Transactions on Power Delivery.

[13]  A.E. Emanuel,et al.  Summary of IEEE standard 1459: definitions for the measurement of electric power quantities under sinusoidal, nonsinusoidal, balanced, or unbalanced conditions , 2004, IEEE Transactions on Industry Applications.

[14]  Anish Deb,et al.  A simplified state-of-the-art sample shifting technique for microcontroller based single phase power measurement , 2014 .