Hamiltonian modelling and nonlinear disturbance attenuation control of TCSC for improving power system stability

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Hamiltonian modelling and nonlinear disturbance attenuation control of TCSC for improving power system stability

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To tackle the obstacle of applying passivity-based control (PBC) into power systems, an affine non-linear system widely existing in power systems is formulated as a standard Hamiltonian system using a pre-feedback method. The port controlled Hamiltonian with dissipation (PCHD) model of TCSC is then established corresponding with a revised Hamiltonian function. Furthermore, employing the modified Hamiltonian function directly as the storage function, a non-linear adaptive L2 gain control method is proposed to solve the problem of L2 gain disturbance attenuation for this Hamiltonian system with parametric perturbations. Finally, simulation results are presented to verify the validity of the proposed controller.

Inspec keywords: compensation; power system stability; thyristor applications; control system synthesis; adaptive control; nonlinear control systems; closed loop systems; feedback

Other keywords: power system stability; storage function; pre-feedback method; affine nonlinear system; port controlled Hamiltonian with dissipation model; nonlinear adaptive L2 gain control method; thyristor controlled serial compensator; Hamiltonian function; nonlinear disturbance attenuation control; Hamiltonian modelling; parametric perturbations; passivity-based control

Subjects: Control system analysis and synthesis methods; Control of electric power systems; Stability in control theory; Power convertors and power supplies to apparatus; Nonlinear control systems; Self-adjusting control systems; Power system control

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