Study on power system transient instability detection based on wide area measurement system

The instability detection method of a power system by directly analyzing the transient response of the electric power system is not only useful for stopping the time domain simulation of system trajectory to reduce CPU time for preventive control program, but also can be used to trigger transient stability emergency control and system splitting based on wide area measurement system. Reliability, speediness and computational simplicity are of primary importance in developing online instability detection method. With regard to these requirements, a novel method for instability detection based on generator angle and angular velocities is proposed in this paper. System instability or out-of-step condition is detected by the characteristics concave or convex of the critical machine trajectory of the post-fault system. The generalized transient energy function method is applied to analysis reliability and robustness of the proposed method. The proposed method was successfully tested on several different power systems varying in size from Single-Machine-Infinite-Bus system and IEEE 50 generator systems. The method is shown to be a potential tool for initiating online emergency control. (7 pages)

[1]  Felix F. Wu,et al.  A BCU method for direct analysis of power system transient stability , 1994 .

[2]  Stewart E. Stanton,et al.  Transient Stability Monitoring for Electric Power Systems Using a Partial Energy Function , 1989, IEEE Power Engineering Review.

[3]  K.R. Padiyar,et al.  Online detection of loss of synchronism using energy function criterion , 2006, IEEE Transactions on Power Delivery.

[4]  Mania Pavella,et al.  Generalized one-machine equivalents in transient stability studies , 1998 .

[5]  A.G. Phadke,et al.  Wide Area Protection—Technology and Infrastructures , 2006, IEEE Transactions on Power Delivery.

[6]  Vijay Vittal,et al.  Transient Stability Test Systems for Direct Stability Methods , 1992 .

[7]  Xiaorong Xie,et al.  WAMS applications in Chinese power systems , 2006 .

[8]  Damien Ernst,et al.  Closed-loop transient stability emergency control , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

[9]  A. A. Girgis,et al.  A new method for power system transient instability detection , 1997 .

[10]  K. R. C. Mamandur,et al.  Transient stability prediction and control in real-time by QUEP , 1989 .

[11]  Felix F. Wu,et al.  Foundations of the potential energy boundary surface method for power system transient stability analysis , 1988 .

[12]  Damir Novosel,et al.  Wide-Area Protection and Emergency Control , 2004, Proceedings of the IEEE.

[13]  Li Peng,et al.  Power System Transient Stability Detection Based on Characteristic Concave or Convex of Traj ectory , 2005, 2005 IEEE/PES Transmission & Distribution Conference & Exposition: Asia and Pacific.

[14]  Kenneth E. Martin,et al.  WACS-Wide-Area Stability and Voltage Control System: R&D and Online Demonstration , 2005, Proceedings of the IEEE.

[15]  Thierry Van Cutsem,et al.  Real-time analytic sensitivity method for transient security assessment and preventive control , 1988 .

[16]  A.G. Phadke,et al.  Synchronized phasor measurements in power systems , 1993, IEEE Computer Applications in Power.

[17]  Damien Ernst,et al.  A Unified Approach to Transient Stability Contingency Filtering, Ranking, and Assessment , 2001 .

[18]  Mania Pavella,et al.  A comprehensive approach to transient stability control. I. Near optimal preventive control , 2003 .

[19]  L. Wehenkel,et al.  Preventive vs. emergency control of power systems , 2004, IEEE PES Power Systems Conference and Exposition, 2004..

[20]  D. Ernst,et al.  Transient stability emergency control combining open-loop and closed-loop techniques , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[21]  Kevin Tomsovic,et al.  Designing the Next Generation of Real-Time Control, Communication, and Computations for Large Power Systems , 2005, Proceedings of the IEEE.

[22]  Deqiang Gan,et al.  Stability-constrained optimal power flow , 2000 .

[23]  M. Pavella,et al.  A comprehensive approach to transient stability control part II: open loop emergency control , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[24]  Qiu Jia-ju,et al.  A reduced-order method for estimating the stability region of power systems with saturated controls , 2007 .

[25]  Mania Pavella,et al.  A comprehensive approach to transient stability control. II. Open loop emergency control , 2003 .

[26]  M. Pavella,et al.  A comprehensive approach to transient stability control part 1: near optimal preventive control , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[27]  H. Xin,et al.  Methods for estimating stability regions with applications to power systems , 2007 .

[28]  Daniel Karlsson,et al.  Wide-Area Protection and Power System Utilization , 2005, Proceedings of the IEEE.

[29]  M. La Scala,et al.  A qualitative approach to the transient stability analysis [of power systems] , 1996 .