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This paper compares some different formulations of voltage stability indices derived from the Jacobian power flow matrix in presence of the secondary voltage regulation. The work is aimed at individuating an appropriate formulation of the Jacobian power flow matrix in order to calculate the maximum singular value to be used in the objective function of an ORPF (optimal reactive power flow). The different...
In the last years electric systems, all around the world, experienced voltage stability problems, basically related to their exploitation, near to the limits, caused by market opportunities and progressive growth of loads with low power factor (air-conditioning, electronic devices, etc.). In this paper it is investigated the problem of modeling some specific components of the electric power system,...
The paper deals with the automatic procedures used for the definition of voltage profiles to be adopted in the operation of bulk power systems with the aim of optimizing both the economic and security issues. After reviewing the most important automatic algorithms for optimal reactive power flow (ORPF) existing in the technical literature, some new ORPF procedures are proposed. They are based on modern...
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