Coordinated control of static synchronous compensator and automatic voltage regulator in multi-machine power systems using pseudo-generalized Hamiltonian theory

Flexible alternating current transmission system devices are widely used to enhance the power transfer limit and stability improvement in transmission networks. They also help damp out both local and inter-area low-frequency oscillations. Using pseudo-generalized Hamiltonian theory, this article investigates the coordinated control of automatic voltage regulator of synchronous generator and static synchronous compensator in multi-machine power systems. First, via a proper variable transformation and pre-feedback control, the dissipative pseudo-generalized Hamiltonian realization of the static synchronous compensator and power system are completed, respectively. Then, based on the obtained dissipative pseudo-generalized Hamiltonian realization, a brand new nonlinear coordinated control law is constructed. Simulation results indicate that the proposed coordinated control scheme can effectively improve both the transient stability and voltage regulation performance of the power system.