Measurement-Based Voltage Stability Assessment by Augmented Coupled Single-Port Models Considering Wind Power Generators

Abstract

Most of bulk grid containing the integration of the large-scale wind power generations may face the challenge of the insufficient voltage stability margin such that reliable monitoring technologies of the voltage stability become urgent. Recent advance focuses on the accurate L-index derived from the coupled single-port model for the voltage stability assessment. However, the conventional coupled single-port model cannot be compatible in a hybrid power grid containing wind power generators and reactive power compensators such that the associate L-index becomes inappropriate. In this paper, the augmented coupled single-port model is proposed to perform the accurate voltage stability assessment under the hybrid power grid. Numerical simulations on the IEEE 14-bus test system is presented to validate the accuracy of the proposed approach.