Defining the Unique Signatures of Loads Using the Currents’ Physical Components Theory and $Z$-Transform

A method to extract unique features from measured waveforms of nonlinear loads is presented. These features can be used for the identification of loads connected to the grid. The method is based on the currents' physical components (CPC) electric power transport theory combined with the Z-transform (for implementation using digital signal processing (DSP). A set of admittance-based Z-transform functions that reflect the current physical components suggested by the CPC is constructed. The resulting transfer functions are shown to reflect the electric physical significance, and are used for electric load and machine identification through its electric characteristics. In this paper, the Z-transform analytic expressions are developed and extended along with their physical comprehension. Moreover, the strength of the theory over more traditional spectral analysis is explained. The method presented in this paper is demonstrated and analyzed using real-world measured waveforms (measured by power quality monitors).

[1]  Dariusz Czarkowski,et al.  Characteristics of modern nonlinear loads and their influence on systems with distributed generation , 2007 .

[2]  Leszek S. Czarnecki,et al.  On-line measurement of equivalent parameters for harmonic frequencies of a power distribution system and load , 1996 .

[3]  Eleonora Riva Sanseverino,et al.  A Generalized Framework for Optimal Sizing of Distributed Energy Resources in Micro-Grids Using an Indicator-Based Swarm Approach , 2014, IEEE Transactions on Industrial Informatics.

[4]  Innocent Kamwa,et al.  Unscented Kalman filter for non-linear estimation of induction machine parameters , 2012 .

[5]  L.S. Czarnecki Currents’ Physical Components (CPC) concept: A fundamental of power theory , 2008, 2008 International School on Nonsinusoidal Currents and Compensation.

[6]  Roberto Gallea,et al.  Heuristic-Based Shiftable Loads Optimal Management in Smart Micro-Grids , 2015, IEEE Transactions on Industrial Informatics.

[7]  Wei Hong,et al.  A Z-transform-based absorbing boundary conditions for 3-D TLM-SCN method , 2002 .

[8]  Luis Angel Barragan,et al.  FPGA-Based Test-Bench for Resonant Inverter Load Characterization , 2013, IEEE Transactions on Industrial Informatics.

[9]  Frank Doherty,et al.  Power quality monitoring systems more information than just waveforms and events , 2014, 2014 16th International Conference on Harmonics and Quality of Power (ICHQP).

[10]  Ivan Nunes da Silva,et al.  Load Profile Identification Interface for Consumer Online Monitoring Purposes in Smart Grids , 2013, IEEE Transactions on Industrial Informatics.

[11]  Daiyin Zhu,et al.  Range Resampling in the Polar Format Algorithm for Spotlight SAR Image Formation Using the Chirp $z$ -Transform , 2007, IEEE Transactions on Signal Processing.

[12]  Pierluigi Siano,et al.  Failure Identification in Smart Grids Based on Petri Net Modeling , 2011, IEEE Transactions on Industrial Electronics.

[13]  E.J. Bueno,et al.  Power System Voltage Harmonic Identification Using Kalman Filter , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[14]  HEMA A MURTHY,et al.  Group delay functions and its applications in speech technology , 2011 .

[15]  M. Kezunovic,et al.  Use of substation IED data for improved alarm processing and fault location , 2008, 2008 40th North American Power Symposium.

[16]  Hsueh-Hsien Chang,et al.  Particle-Swarm-Optimization-Based Nonintrusive Demand Monitoring and Load Identification in Smart Meters , 2012, IEEE Transactions on Industry Applications.

[17]  Hsueh-Hsien Chang,et al.  Particle-Swarm-Optimization-Based Nonintrusive Demand Monitoring and Load Identification in Smart Meters , 2013 .

[18]  Alexander Eigeles Emanuel,et al.  Power Definitions and the Physical Mechanism of Power Flow: Emanuel/Power Definitions and the Physical Mechanism of Power Flow , 2010 .

[19]  Mladen Kezunovic,et al.  Automating the analysis of faults and power quality , 1999 .

[20]  M. Kezunovic,et al.  Improved Fault Location on Distribution Feeders Based on Matching During-Fault Voltage Sags , 2009, IEEE Transactions on Power Delivery.

[21]  Doron Shmilovitz,et al.  Loss-free complex impedance network elements , 2006, IEEE Transactions on Circuits and Systems I: Regular Papers.

[22]  W. D. Humpage,et al.  z-plane synthesis of response functions and interpolators in z-transform electromagnetic transient analysis in power systems , 1982 .

[23]  Pradipta Kishore Dash,et al.  Measurement and Classification of Simultaneous Power Signal Patterns With an S-Transform Variant and Fuzzy Decision Tree , 2013, IEEE Transactions on Industrial Informatics.

[24]  D. Shmilovitz,et al.  On the definition of total harmonic distortion and its effect on measurement interpretation , 2005, IEEE Transactions on Power Delivery.

[25]  Leszek S. Czarnecki Meta-theory of electric powers and present state of power theory of circuits with periodic voltages and currents , 2013 .

[26]  Ali Keyhani,et al.  Modeling and Parameter Identification of Electric Machines , 2005 .

[27]  Christophe d'Alessandro,et al.  Zeros of Z-transform representation with application to source-filter separation in speech , 2005, IEEE Signal Processing Letters.

[28]  Pablo Fernandez-Comesana,et al.  A Signal-Processing Adaptive Algorithm for Selective Current Harmonic Cancellation in Active Power Filters , 2009, IEEE Transactions on Industrial Electronics.

[29]  L. S. Czarnecki Scattered and reactive current, voltage, and power in circuits with nonsinusoidal waveforms and their compensation (power systems) , 1991 .

[30]  Yakup Demir,et al.  Automatic classification of power quality events and disturbances using wavelet transform and support vector machines , 2012 .

[31]  Doron Shmilovitz,et al.  Low-harmonic thyristor rectifiers applying current injection , 2003 .

[32]  Doron Shmilovitz,et al.  Distributed Maximum Power Point Tracking in Photovoltaic Systems—Emerging Architectures and Control Methods , 2012 .

[33]  Carmine Landi,et al.  Low cost combined voltage and current transducer for Smart Meters , 2014, 2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings.

[34]  Samuel H. Huang,et al.  Robust and Efficient Rule Extraction Through Data Summarization and Its Application in Welding Fault Diagnosis , 2008, IEEE Transactions on Industrial Informatics.

[35]  Doron Shmilovitz Gyrator Realization Based on a Capacitive Switched Cell , 2006, IEEE Transactions on Circuits and Systems II: Express Briefs.

[36]  Daniel Crevier,et al.  Estimation of Higher Frequency Network Equivalent Impedances by Harmonic Analysis Natural Waveforms , 1978, IEEE Transactions on Power Apparatus and Systems.

[37]  Carmine Landi,et al.  A low cost smart meter network for a smart utility , 2014, 2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings.

[38]  Srikrishna Subramanian,et al.  Non-intrusive efficiency estimation method for energy auditing and management of in-service induction motor using bacterial foraging algorithm , 2010 .

[39]  Francisco de Leon,et al.  AC Power Theory From Poynting Theorem: Accurate Identification of Instantaneous Power Components in Nonlinear-Switched Circuits , 2010, IEEE Transactions on Power Delivery.

[40]  L. S. Czarnecki,et al.  Powers in nonsinusoidal networks: their interpretation, analysis, and measurement , 1990 .