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Secondary Voltage Control Areas Using Hybrid Methods for Systems with High Wind Penetration

Abstract:

The problem of voltage stability has become a major challenge in current power systems, where there is high penetration of wind energy and ineffective voltage control schemes to adequately take advantage of reactive power reserves. This work presents a novel proposal for secondary voltage control, which considers quasi-optimal control areas determined based on Modal Energy criteria and a MonteCarlo Simulation Approach combined with K-means clustering. The simulations consider the concept of Extended Power Flow, the inclusion of stochastic models for Wind Power and the optimization of reactive power reserves for control. This proposal is intended to optimize reactive power resources when voltage setpoints are defined in pilot area buses for control purposes. The results of the proposed control strategy are validated by Residue Method Evaluation and Quasi-Dynamic Simulation. In the determined control areas, the most critical buses are identified. In this buses, reactive compensation devices are incorporated to contribute to the voltage control of the areas. The proposed methods are applied in the IEEE 39-bus system. The obtained results clearly show the effectiveness of the proposed control strategy. In addition, a statistical comparison with results in which there is no control is presented.