Hierarchical robust state estimation in power system using phasor measurement units

State estimation based on phasor measurement units is essential for control and monitoring of large scale power systems. In this paper, a hierarchical robust state estimator algorithm is proposed. The proposed method has many good features. Firstly it is hierarchical, by which regional estimate estimators are working for local use, while an upper level estimator improves their estimation for local and global use. Secondly, since not all buses have PMUs, the combination of data from PMUs and RTUs is being considered for a better estimation. Thirdly, it uses a robust algorithm, to overcome the problem of bad data set. Combining robust estimators in hierarchical method is a new technique for reliable and fast state estimation. The simulation results of proposed solution are presented for IEEE 14-bus test system.

[1]  Ali Abur,et al.  Identifying the unknown circuit breaker statuses in power networks , 1995 .

[2]  M. R. Irving,et al.  Power System State Estimation Using Linear Programming , 1978 .

[3]  Virgilio Centeno,et al.  Benefits of Synchronized-Measurement Technology for Power-Grid Applications , 2007, 2007 40th Annual Hawaii International Conference on System Sciences (HICSS'07).

[4]  Fernando L. Alvarado,et al.  Network topology determination using least absolute value state estimation , 1995 .

[5]  J. Thorp,et al.  State Estimation with Phasor Measurements , 1986, IEEE Power Engineering Review.

[6]  M. Vidyasagar,et al.  Bad Data Rejection Properties of Weughted Least Absolute Value Techniques Applied to Static State Estimation , 1982, IEEE Transactions on Power Apparatus and Systems.

[7]  D. Falcão,et al.  Linear programming state estimation: error analysis and gross error identification , 1988 .

[8]  E. Handschin,et al.  Static state estimation in electric power systems , 1974 .

[9]  A. G. Expósito,et al.  Power system state estimation : theory and implementation , 2004 .

[10]  William H. Sanders,et al.  A Kalman-Based Coordination for Hierarchical State Estimation:  Agorithm and Analysis , 2008, Proceedings of the 41st Annual Hawaii International Conference on System Sciences (HICSS 2008).

[11]  Yeo Jun Yoon.  Study of the utilization and benefits of phasor measurement units for large scale power system state estimation , 2006 .

[12]  J. S. Thorp,et al.  State Estimlatjon with Phasor Measurements , 1986, IEEE Transactions on Power Systems.

[13]  Moustafa Chenine,et al.  Survey on priorities and communication requirements for PMU-based applications in the Nordic Region , 2009, 2009 IEEE Bucharest PowerTech.

[14]  M. M. Salem,et al.  Two-level state estimation for large power system. I. Algorithms , 1988 .

[15]  S. Premrudeepreechacharn,et al.  An optimal measurement placement method for power system harmonic state estimation , 2005, IEEE Transactions on Power Delivery.

[16]  A.G. Phadke,et al.  Comparative testing of synchronized phasor measurement units , 2004, IEEE Power Engineering Society General Meeting, 2004..

[17]  Arun G. Phadke,et al.  Synchronized Phasor Measurements and Their Applications , 2008 .

[18]  A. Abur,et al.  Total transfer capability computation for multi-area power systems , 2006, IEEE Transactions on Power Systems.

[19]  H. W. Hong,et al.  Field operational experiences with on line state estimator , 1994 .