Improved dynamic security assessment for AC/DC power systems using energy functions

A method is presented to integrate the dynamics of DC power flow into calculations of transient energy functions of AC/DC power systems. This method treats the generator input power as a function of the parameters and the input, output variables of the DC damping power controller. By using this transient energy function, the accuracy of the stability prediction of AC/DC power systems is improved. The new transient energy function is validated using 12-bus and 30-bus test systems by comparing the stability results with those obtained from time simulation. The new transient energy function is used in a number of studies to establish its effectiveness.

[1]  C. Radhakrishna,et al.  Transient Stability Analysis of Multi-Machine AC/DC Power Systems Via Energy-Function Method , 1981, IEEE Transactions on Power Apparatus and Systems.

[2]  A. A. Fouad,et al.  A Simplified Two-Terminal HVDC Model and Its Use in Direct Transient Stability Assessment , 1987, IEEE Transactions on Power Systems.

[3]  David J. Hill,et al.  Incorporation of SVCs into energy function methods , 1992 .

[4]  M. Ghandhari,et al.  Control Lyapunov Functions for Controllable Series Devices , 2001, IEEE Power Engineering Review.

[5]  M. Pavella,et al.  Direct methods for studying dynamics of large-scale electric power systems - A survey , 1985, Autom..

[6]  Thomas J. Overbye,et al.  Improved techniques for power system voltage stability assessment using energy methods , 1991 .

[7]  Vijay Vittal,et al.  Incorporation of HVDC and SVC models in the Northern State Power Co. (NSP) network; for on-line implementation of direct transient stability assessment , 1995 .

[8]  V. Vittal,et al.  Direct Transient Stability Assessment with Excitation Control , 1989, IEEE Power Engineering Review.

[9]  Claudio A. Canizares,et al.  A vector energy function approach for security analysis of AC/DC systems , 1992 .

[10]  L. Chen,et al.  Components of Nodal Prices for Electric Power Systems , 2001, IEEE Power Engineering Review.

[11]  V. Vittal,et al.  Incorporation of Nonlinear Load Models in the Transient Energy Function Method , 1989, IEEE Power Engineering Review.

[12]  R. Podmore,et al.  A Practical Method for the Direct Analysis of Transient Stability , 1979, IEEE Transactions on Power Apparatus and Systems.

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

[14]  C. W. Taylor,et al.  HVDC controls for system dynamic performance , 1991 .