Measuring electric power quality: Problems and perspectives

Abstract The proliferation of non-linear and time-variant loads is causing a number of disturbances on the electric network, from a more and more significant distortion of both currents and voltages, to transient disturbances on the supply voltage. In this respect the electric network behaves as an “healthy carrier” of disturbances, so that a disturbance generated by one customer can be distributed to other customers, causing possible damage to their equipment. The measurement of the quality of the electric power in a network section is therefore becoming an impelling need, especially in a deregulated electricity market, where each actor can be responsible for the injection of disturbances. However, there are still some respects of power-quality measurement, from both the methodological and instrumental point of views, that are still unsolved and require to be carefully analyzed. The paper gives a survey of these problems and some indications about the present trends of the research work in this field.

[1]  Alessandro Ferrero,et al.  A power-quality index based on multipoint measurements , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[2]  W.J.M. Moore,et al.  On the Definition of Reactive Power Under Non-Sinusoidal Conditions , 1980, IEEE Transactions on Power Apparatus and Systems.

[3]  Cesare Svelto,et al.  Optically-supplied voltage transducer for distorted signals in high-voltage systems , 2000, IEEE Trans. Instrum. Meas..

[4]  Leszek S. Czarnecki,et al.  Considerations on the Reactive Power in Nonsinusoidal Situations , 1985, IEEE Transactions on Instrumentation and Measurement.

[5]  Alessandro Ferrero,et al.  Measurement of the electric power quality and related problems , 2007 .

[6]  Paolo Tenti,et al.  Evaluation of Instantaneous Power Terms in Multi-Phase Systems: Techniques and Application to Power , 2007 .

[7]  Hirofumi Akagi,et al.  Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components , 1984, IEEE Transactions on Industry Applications.

[8]  A. P. J. Rens,et al.  On techniques for the localisation of multiple distortion sources in three‐phase networks: Time domain verification , 2001 .

[9]  L. S. Czarnecki Power theory of electric circuits: common data base of power related phenomena and properties , 1994 .

[10]  A. Ferrero,et al.  The random-fuzzy variables: A new approach for the expression of uncertainty in measurement , 2003, Proceedings of the 20th IEEE Instrumentation Technology Conference (Cat. No.03CH37412).

[11]  Alessandro Ferrero,et al.  A linearization method for commercial Hall-effect current transducers , 2001, IEEE Trans. Instrum. Meas..

[12]  Wang Xiao-yan,et al.  Difference of GB 1 7625.1-2003 《Electromagnetic Compatibility-Limits-Limits for Harmonic Current Emissions (Equipment Input Current Per Phase≤16A)》 , 2003 .

[13]  Alessandro Ferrero,et al.  A new low-cost voltage-to-voltage transducer for distorted signals , 1997, IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings.

[14]  Alexander E. Emanuel,et al.  Harmonic pollution metering: theoretical considerations , 2000 .

[15]  Jacques L. Willems,et al.  A new interpretation of the Akagi-Nabae power components for nonsinusoidal three-phase situations , 1992 .

[16]  Alessandro Ferrero,et al.  A new space‐vector transformation for four‐conductor systems , 2007 .

[17]  C. Liguori,et al.  Propagation of uncertainty in a discrete Fourier transform algorithm , 2000 .

[18]  Carlo Muscas Assessment of electric power quality: indices for identifying disturbing loads , 2007 .

[19]  L. S. Czarnecki Current and power equations at bidirectional flow of harmonic active power in circuits with rotating machines , 2007 .

[20]  A. J. Berrisford Should a utility meter harmonics , 1992 .

[21]  L. S. Czarnecki Power factor improvement of three-phase unbalanced loads with non-sinusoidal supply voltage , 2007 .

[22]  L. Czarnecki What is wrong with the Budeanu concept of reactive and distortion power and why it should be abandoned , 1987, IEEE Transactions on Instrumentation and Measurement.

[23]  J. D. van Wyk,et al.  On techniques for localization of sources producing distortion in three‐phase networks , 2007 .

[24]  M. Depenbrock,et al.  Quantities of a multiterminal circuit determined on the basis of Kirchhoff's laws , 2007 .

[25]  Alessandro Ferrero,et al.  A distributed system for electric power quality measurement , 2002, IEEE Trans. Instrum. Meas..

[26]  Antonio Pietrosanto,et al.  Structured approach to estimate the measurement uncertainty in digital signal elaboration algorithms , 1999 .

[27]  Alessandro Ferrero,et al.  A new approach to the definition of power components in three-phase systems under nonsinusoidal conditions , 1991 .

[28]  D. Sharon Reactive-power definitions and power-factor improvement in nonlinear systems , 1974 .

[29]  Alessandro Ferrero,et al.  The impact of Internet transmission on the uncertainty in the electric power quality estimation by means of a distributed measurement system , 2003, IEEE Trans. Instrum. Meas..

[30]  Alessandro Ferrero,et al.  A calibration procedure for a digital instrument for electric power quality measurement , 2002, IEEE Trans. Instrum. Meas..

[31]  L. Czarnecki Orthogonal decomposition of the currents in a 3-phase nonlinear asymmetrical circuit with a nonsinusoidal voltage source , 1988 .

[32]  Carlo Muscas,et al.  Multi-point measurement techniques for harmonic pollution monitoring: a comparative analysis , 2004 .

[33]  P. Zakikhani,et al.  Suggested definition of reactive power in nonsinusoidal systems , 1973 .

[34]  Alessandro Ferrero,et al.  The random-fuzzy variables: a new approach to the expression of uncertainty in measurement , 2004, IEEE Transactions on Instrumentation and Measurement.

[35]  Alessandro Ferrero,et al.  An approach to the non‐active power concept in terms of the poynting‐park vector , 2000 .

[36]  Ciro Spataro,et al.  Approaches to evaluate the virtual instrumentation measurement uncertainties , 2002, IEEE Trans. Instrum. Meas..

[37]  Lamia Berrah,et al.  Fuzzy handling of measurement errors in instrumentation , 1997, IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings.

[38]  A. E. Emanuel,et al.  Practical definitions for powers in systems with nonsinusoidal waveforms and unbalanced loads: a discussion , 1996 .

[39]  S. Standard GUIDE TO THE EXPRESSION OF UNCERTAINTY IN MEASUREMENT , 2006 .

[40]  Alessandro Ferrero,et al.  Power and current decompositions into time- and frequency-domain components: analysis and comparison , 2007 .

[41]  L. Cristaldi,et al.  Mathematical foundations of the instantaneous power concepts: An algebraic approach , 2008 .

[42]  Alexander Eigeles Emanuel,et al.  Poynting vector and the physical meaning of nonactive powers , 2005, IEEE Transactions on Instrumentation and Measurement.

[43]  Jacques L. Willems,et al.  Mathematical foundations of the instantaneous power concepts: a geometrical approach , 2007 .

[44]  Alessandro Ferrero,et al.  An innovative approach to the determination of uncertainty in measurements based on fuzzy variables , 2003, IEEE Trans. Instrum. Meas..