Estimating the Voltage Stability Margin Using PMU Measurements

This paper presents a new method based on phasor measurement units (PMUs) for the estimation of voltage stability margin in a power system to increase operator's situational awareness. The method assumes a PMU measurement preprocessing technique as a priori in order to eliminate data inconsistency and uncertainty caused by random load disturbances. The measurements are then used in the computation of voltage stability margin based on the coupled single-port Thevenin equivalent model and the cubic spline extrapolation technique. Moreover, some practical operating constraints such as the generator reactive power limits are taken into account for practical assessment of the method's performance. Extensive case studies conducted on several standard IEEE test systems are used to demonstrate the effectiveness of the proposed method.

[1]  M. Glavic,et al.  Wide-Area Detection of Voltage Instability From Synchronized Phasor Measurements. Part I: Principle , 2009, IEEE Transactions on Power Systems.

[2]  C. F. Henville,et al.  Summary of "System protection and voltage stability" , 1995 .

[3]  Youping Fan,et al.  A Novel Online Estimation Scheme for Static Voltage Stability Margin Based on Relationships Exploration in a Large Data Set , 2015, IEEE Transactions on Power Systems.

[4]  Yunfei Wang,et al.  Identification of critical components for voltage stability assessment using channel components transform , 2014 .

[5]  P. S. Georgilakis,et al.  Taxonomy of PMU Placement Methodologies , 2012, IEEE Transactions on Power Systems.

[6]  M. Begovic,et al.  Use of local measurements to estimate voltage-stability margin , 1997, Proceedings of the 20th International Conference on Power Industry Computer Applications.

[7]  Carl de Boor,et al.  A Practical Guide to Splines , 1978, Applied Mathematical Sciences.

[8]  Hsiao-Dong Chiang,et al.  CPFLOW: a practical tool for tracing power system steady-state stationary behavior due to load and generation variations , 1995 .

[9]  F. Gubina,et al.  A new concept of voltage-collapse protection based on local phasors , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[10]  S. Corsi,et al.  A Real-Time Voltage Instability Identification Algorithm Based on Local Phasor Measurements , 2008, IEEE Transactions on Power Systems.

[11]  G. Irisarri,et al.  Methods for contingency screening and ranking for voltage stability analysis of power systems , 1995, Proceedings of Power Industry Computer Applications Conference.

[12]  Chia-Chi Chu,et al.  Wide-Area Measurement-Based Voltage Stability Indicators by Modified Coupled Single-Port Models , 2014, IEEE Transactions on Power Systems.

[13]  Thomas J. Overbye,et al.  Extracting steady state values from phasor measurement unit data using FIR and median filters , 2009, 2009 IEEE/PES Power Systems Conference and Exposition.

[14]  Robert A. Schlueter.  A voltage stability security assessment method , 1998 .

[15]  Wilsun Xu,et al.  Voltage stability monitoring based on the concept of coupled single-port circuit , 2012, 2012 IEEE Power and Energy Society General Meeting.

[16]  Miroslav Begovic,et al.  Voltage Stability Protection and Control Using a Wide Area Network of Phasor Measurements , 2002, IEEE Power Engineering Review.

[17]  Alexander J. Flueck,et al.  Look-ahead voltage and load margin contingency selection functions for large-scale power systems , 1997 .

[18]  Anjan Bose,et al.  Bandwidth and latency requirements for smart transmission grid applications , 2013, PES 2013.

[19]  P. Kundur,et al.  Definition and classification of power system stability IEEE/CIGRE joint task force on stability terms and definitions , 2004, IEEE Transactions on Power Systems.

[20]  F. Gubina,et al.  Local voltage-stability index using tellegen's Theorem , 2007, 2007 IEEE Power Engineering Society General Meeting.

[21]  Olav Bjarte Fosso,et al.  A method for calculation of margins to voltage instability applied on the Norwegian system for maintaining required security level , 1993 .

[22]  Venkataramana Ajjarapu,et al.  The continuation power flow: a tool for steady state voltage stability analysis , 1991 .

[23]  T. Carlsen,et al.  Voltage stability condition in a power transmission system calculated by sensitivity methods , 1990 .

[24]  M. Parniani,et al.  A Fast Local Index for Online Estimation of Closeness to Loadability Limit , 2010, IEEE Transactions on Power Systems.

[25]  Robert J. Thomas,et al.  A posturing strategy against voltage instabilities in electric power systems , 1988 .

[26]  P. Kundur,et al.  Voltage stability analysis using static and dynamic approaches , 1993 .

[27]  Mladen Kezunovic,et al.  Regression tree for stability margin prediction using synchrophasor measurements , 2013, IEEE Transactions on Power Systems.

[28]  P. Kundur,et al.  Power system stability and control , 1994 .

[29]  James S. Thorp,et al.  Synchronized Phasor Measurement Applications in Power Systems , 2010, IEEE Transactions on Smart Grid.

[30]  B. Gao,et al.  Voltage Stability Evaluation Using Modal Analysis , 1992, IEEE Power Engineering Review.