Monitoring Power Quality in Microgrids Based on Disturbances Propagation Algorithms

The paper shows how the surveying of power quality in microgrids working under unbalanced harmonic distorted operating states with possible voltage dips and voltage swells existence can be accomplished implying a small amount of time and measurement activities. The surveying methodology uses the disturbances propagation phenomenon to determine the power quality indices in all of interest nodes of the microgrid utilizing the voltages and currents characteristics in one or several strategic nodes. The disturbances propagation is based on the sequence component theory applied for all detected harmonics and for the microgrids components. The proposed surveying methodology was implemented in a virtual instrument capable to acquire the voltages and currents waveforms, to analyze them in order to identify the disturbances characteristics, to calculate the disturbances propagation and display the power quality indices in all of interest nodes of the microgrid. The virtual instrument was tested using several microgrid topologies and scenarios.

[1]  C. Schwaegerl.  Advanced Architectures and Control Concepts for More Microgrids , 2008 .

[2]  Nicoleta Gillich,et al.  The use of virtual instruments in engineering education , 2010 .

[3]  Walmir Freitas,et al.  Phase-decoupled method for three-phase power-flow analysis of unbalanced distribution systems , 2004 .

[4]  M. Castilla,et al.  Power System Frequency Measurement Under Nonstationary Situations , 2008, IEEE Transactions on Power Delivery.

[5]  Anthony J. Pansini.  Electrical Distribution Engineering , 1991 .

[6]  Jen-Hao Teng,et al.  A LabVIEW based virtual instrument for power analyzers , 2000, PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409).

[7]  Luigi Ferrigno,et al.  Measurements for the characterization of passive components in non-sinusoidal conditions , 2002, IEEE Trans. Instrum. Meas..

[8]  Filippo Attivissimo,et al.  SCADA/HMI Systems in Advanced Educational Courses , 2007, IEEE Transactions on Instrumentation and Measurement.

[9]  Anca Miron,et al.  Harmonics and interharmonics analysis of power signals using Gaussian filter banks , 2014, 2014 49th International Universities Power Engineering Conference (UPEC).

[10]  K. M. Nor,et al.  Improved three-phase power-flow methods using sequence components , 2005, IEEE Transactions on Power Systems.

[11]  J. Teng.  A modified Gauss–Seidel algorithm of three-phase power flow analysis in distribution networks , 2002 .

[12]  Reza Iravani,et al.  Unbalanced Model and Power-Flow Analysis of Microgrids and Active Distribution Systems , 2010, IEEE Transactions on Power Delivery.

[13]  N. Hatziargyriou,et al.  Microgrids: an overview of ongoing research, development, anddemonstration projects , 2007 .

[14]  Mircea Chindris,et al.  POWER QUALITY INDICES FOR UNBALANCE CHARACTERIZATION IN NON-SINUSOIDAL CONDITION , 2010 .

[15]  D. Shirmohammadi,et al.  A compensation-based power flow method for weakly meshed distribution and transmission networks , 1988 .

[16]  D. Shirmohammadi,et al.  A three-phase power flow method for real-time distribution system analysis , 1995 .

[17]  Vander Menengoy da Costa,et al.  Developments in the analysis of unbalanced three-phase power flow solutions , 2007 .

[18]  Zhang Zhe.  Characteristics and Propagation of Voltage Sags in Power Systems , 2004 .

[19]  K.M. Nor,et al.  Development of unbalanced three-phase distribution power flow analysis using sequence and phase components , 2008, 2008 12th International Middle-East Power System Conference.

[20]  Irena Orovic,et al.  A Virtual Instrument for Time-Frequency Analysis of Signals With Highly Nonstationary Instantaneous Frequency , 2011, IEEE Transactions on Instrumentation and Measurement.

[21]  Liao Hua,et al.  Steady-state model and power flow analysis of grid-connected photovoltaic power system , 2008, 2008 IEEE International Conference on Industrial Technology.

[22]  Giovanni Bucci,et al.  Digital measurement station for power quality analysis in distributed environments , 2003, IEEE Trans. Instrum. Meas..

[23]  Ferdinanda Ponci,et al.  A Virtual Instrument for Time-Frequency Analysis of Park Power Components , 2006 .

[24]  D. P. Franklin,et al.  The J & P transformer book;: A practical technology of the power transformer , 1973 .

[25]  Lieven Vandevelde,et al.  Active Load Control in Islanded Microgrids Based on the Grid Voltage , 2011, IEEE Transactions on Smart Grid.

[26]  Jinfu Chen,et al.  Power flow study and voltage stability analysis for distribution systems with distributed generation , 2006, 2006 IEEE Power Engineering Society General Meeting.

[27]  K. L. Lo,et al.  Decomposed three-phase power flow solution using the sequence component frame , 1993 .

[28]  M. Chindris,et al.  Propagation of unbalance in electric power systems , 2007, 2007 9th International Conference on Electrical Power Quality and Utilisation.

[29]  Wen Xinling,et al.  Design and Simulation of Voltage Fluctuation Rate Monitor System Based on Virtual Instrument Technology , 2012 .