document: Hamiltonian modelling and nonlinear disturbance attenuation control of TCSC for improving power system stability To tackle the obstacle of applying passivity-based control -LRB- PBC -RRB- to 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 -LRB- PCHD -RRB- model of a thyristor controlled serial compensator -LRB- TCSC -RRB- is then established corresponding with a revised Hamiltonian function . Furthermore , employing the modified Hamiltonian function directly as the storage function , a non-linear adaptive L/sub 2 / gain control method is proposed to solve the problem of L/sub 2 / gain disturbance attenuation for this Hamiltonian system with parametric perturbations . Finally , simulation results are presented to verify the validity of the proposed controller
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