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This paper presents a novel method to evaluate the Volt-VAR interactions among the buses using relative gain (RG). Following the viewpoint of a multi-input-multi-output system, the Volt-VAR coupling RG is calculated based on the QV matrix which is extracted from power flow Jacobian matrix to evaluate the Volt-VAR interactions among the buses. The voltage stability weak buses are identified through...
Loading margin sensitivity (LMS) has been widely used in applications in the realm of voltage stability assessment and control. Typically, LMS is derived based on system equilibrium equations near bifurcation and therefore requires full detailed system model and significant computation effort. Availability of phasor measurement units (PMUs) due to the recent development of wide-area monitoring system...
An new approach to determine the margin of voltage stability region in power injection space (SVSR) for power system with wind farms is presented. The SVSR boundary is described by a set of hyper-planes, whose number and tangent point are determined by clustering method. The presented approach is validated by several power system. It can be revealed that the approach can be used for power system voltage...
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