FAST CALCULATION OF A VOLTAGE STABILITY INDEX OF POWER-SYSTEMS

The minimum singular value of the Jacobian matrix of the load flow equ ation may have been preferred as an indicator of voltage collapse when the static voltage stability of power systems is studied. In this pap er we propose a highly efficient algorithm to calculate the smallest s ingular value of a Jacobian matrix of the load flow equation by employ ing the non-iterative characteristic of an Incremental Condition Estim ation (ICE) method and the sparsity characteristic of large scale powe r networks. Both theoretical basis and computation cost of the algorit hm are also detailed in the context. Finally, a practical application example is also given for demonstration.