Method and device for constructing dynamic security region of power grid based on extended phase trajectory theory
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United States of America
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Mar 18, 2025
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Aug 23, 2024
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Aug 23, 2024
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Abstract
A method for constructing a dynamic security region of a power grid based on an extended phase trajectory theory includes: obtaining a system transient stability condition and a power angle leading generator group by transient simulation of an initial operation point of a system; for generators in the leading generator group A, changing output of each of the generators to search for a dominant instability critical point; calculating the reciprocal of the slope of the tangent line of the trajectory of n swings of an extended phase plane based on angular velocity-angular acceleration in a fourth quadrant, and changing a small disturbance output of the generator at the dominant instability critical point to solve a sensitivity of the extended phase trajectory; and constructing a multi-modal practical dynamic security region based on the extended phase trajectory.
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