Alternative Parameterization For Assessing Branch Outages By A Continuation Method

This paper proposes and tests new parameters, namely the voltage magnitudes, phase angles and the total power losses, for evaluating the effects of branch outages. The approach can be used as a verification tool after a list of critical contingencies had been ranked according to their severities by the contingency selection function. It is then possible to find whether the non-convergence of a power flow is due to a numerical problem or to an infeasible operating situation. Besides, the proposed parameters have a clear physical meaning rather than geometrical and allow the development and application of continuation methods for power systems contingency analysis. The main advantage of using the total real power losses as a parameter is that it is not necessary to change parameters during the solutions tracing until beyond the simple limit point, where the original Jacobian is singular. Results are presented for the IEEE 14 and 57 bus test system. © 2004 IEEE.3944Mansour, Y., Suggested techniques for voltage stability analysis (1993) IEEE Power Engineering Subcommittee Rep. 93TH0620-5-PWRVoltage stability assessment, procedures and guides (1999) Final Draft, , http://www.power.uwaterloo.ca, [Online]Voltage stability criteria, undervoltage load shedding strategy, and reactive power reserve monitoring methodology (1998) Final Report, , Technical Studies Subcommittee, Western Systems Coordinating Council, MayFeng, Z., Xu, W., Oakley, C., McGoldrick, S., Experiences on assessing Alberta power system voltage stability with respect to the WSCC reactive power criteria Proc. 1999 IEEE Power Engineering Society Summer Meeting, pp. 1297-1302Cañizares, C.A., Alvarado, F.L., Point of collapse and continuation methods for large AC/DC systems (1993) IEEE Trans. Power Systems, 8, pp. 1-8. , FebAlves, D.A., Da Silva, L.C.P., Castro, C.A., Da Costa, V.F., Parameterized fast decoupled power flow methods for obtaining the maximum loading point of power systems - Part-I: Mathematical modeling (2004) Electric Power Systems Research, 69, pp. 93-104. , AprilChiang, H.D., Li, H., Yoshida, H., Fukuyama, Y., Nakanishi, Y., The generation of ZIP-V curves for tracing power system steady state stationary behavior due to load and generation variations Proc. 1999 IEEE PES Summer Meeting, pp. 647-651Ajjarapu, V., Christy, C., The continuation power flow: A tool for steady state voltage stability analysis (1992) IEEE Trans. on Power Systems, 7, pp. 416-423. , FebChiang, H.D., Flueck, A.J., Shah, K.S., Balu, N., CPFLOW: A practical tool for tracing power systems steady-state stationary behavior due to load and generation variations (1995) IEEE Trans. Power Systems, 10, pp. 623-633. , MayFeng, Z., Xu, W., Fast computation of post-contingency system margins for voltage stability assessments of large-scale power systems (2000) IEE Proceedings-generation, Transmission and Distribution, 147 (2), pp. 76-80Scott, G., Dobson, I., Alvarado, F.L., Contingency ranking for voltage collapse via sensitivities from a single nose curve (1999) IEEE Trans. on Power Systems, 14, pp. 232-240. , FebJia, Z., Jeyasurya, B., Contingency ranking for on-line voltage stability assessment (2000) IEEE Trans. on Power Systems, 15, pp. 1093-1097. , AugVaahedi, E., Fuchs, C., Xu, W., Mansour, Y., Hamadanizadeh, H., Morison, G.K., Voltage stability contingency screening and ranking (1999) IEEE Trans. on Power Systems, 14, pp. 256-262. , FebFlueck, A.J., Dondetti, J.R., A new continuation power flow tool for investigating the nonlinear effects of transmission branch parameter variations (2000) IEEE Trans. on Power Systems, 15, pp. 223-227. , FebAlves, D.A., Da Silva, L.C.P., Castro, C.A., Da Costa, V.F., Continuation load flow method parameterized by power losses Proc. 2000 IEEE Power Engineering Society Winter Meeting, pp. 1123-1128Long, B., Ajjarapu, V., A critical review of the applications of homotopy and continuation methods to power system analysis Proc. 1996 28th NAPS Conf, pp. 8-15. , M.I.