A Novel Scheme for Placement and Sizing of SVCs to Improve Voltage Stability of Wind-Integrated Power Systems

Abstract

On the grid front, issues concerning voltage instability worsen further as and when large wind farms are integrated at multiple locations in an existing network. Since the wind power is fluctuating in nature, it largely affects the reactive power mismatch and prevents the grid operators from injection of wind power to the grid even though it is available abundantly. Dynamic compensation of reactive power at multiple locations of the network could be an effective means for addressing such problems. This paper presents a novel method for suitable placement and sizing of Static VAR Compensators at desired locations, such that smooth evacuation of wind power can occur under various operating conditions, while maintaining voltage stability, simultaneously. The authors have studied the adverse impacts of wind penetration under various system conditions and implemented the scheme in order to improve voltage sensitivity index. The results obtained from the case studies conducted on the standard IEEE 30-bus and practical Indian 28-bus test systems validate the proposed scheme.

Keywords

• Voltage stability; L-index; Wind Integration; SVC; Grid Code

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