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Abstract
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As more fluctuating and unpredictable renewable energy enters the power grid, the complexity of real-time voltage stability assessment and control increases. A measurement-based real-time wide-area loading margin sensitivity analysis is a novel solution to this problem. This analysis is a challenging task when a wind farm is integrated into a WAMS-based large power system with GPS-aided PMU technology. The novelty of this research is the computation of a real-time sensitivity index by changing DFIG-oriented wind-farm locations and increasing static load levels linearly. It helps determine the best location for integrating the wind farm into the existing power system, load shedding, and additional load increment decisions instantly as per the demand. It is the best option for identifying the weakest buses and providing situational awareness to the grid operator for load voltage control to avoid blackouts. A three phase industrial category load experimental study is validated on the SEL-based hardware test-bed using actual PMU recordings. The proposed analysis was found to be accurate for voltage assessment on the WSCC 3-machine 9-bus system and the New England 16-machine 68-bus large power systems.
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