Superconducting magnetic energy storage controller design and stability analysis for a power system with various load characteristics |
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Affiliation: | 1. Department of Engineering & Public Policy, Carnegie Mellon University, Pittsburgh, PA 15213, USA;2. Tepper School of Business, Carnegie Mellon University, Pittsburgh, PA 15213, USA |
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Abstract: | A simultaneous active power and reactive power (P–Q) control scheme of superconducting magnetic energy storage (SMES) unit is proposed to enhance the damping of a power system. In order to control the P–Q modulation to the power system, a proportional-integral (PI) controller is used to provide a supplementary damping signal. The parameters of the PI controller are determined by a systematic pole assignment method based on modal control theory. Both static load and dynamic load are included to improve the system model fidelity. Eigenvalue analysis and time-domain nonlinear simulation, using a power system incorporating a composite load, are illustrated to validate the effectiveness of the proposed PI SMES controller for the damping of the studied system over a wide range of operating conditions. The control scheme also shows that the stability margin of the power system is expanded. |
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