Nonlinear Control For Power Systems With Static Var Compensator

Power system is a typical uncertain large-scale nonlinear system. With the development of the society and the economy, demands to energy increased greatly have been leading to the rapid development of modern power systems. Power systems are becoming more and more complex. The high demands to safety, economy and power quality of power systems make FACTS an important research area in power systems. Because of many advantages, as one of important apparatus in FACTS, SVC is the direction of reactive power compensation. But almost all of the existing SVC controllers under operation are designed on the basis of model which is approximately linearized at an equilibrium point, translating the nonlinear system into approximate linear system. Lately, the speedy development of theory of generalized Hamiltonian system makes it one of important nonlinear research methods, considering sufficiently the nonlinear characters of systems.The followings are the main contributions of this dissertation:1,In the dissertation , considering the nonlinear characters of power systems with SVC, the nonlinear dynamic model is constituted, which transformed into the generalized Hamiltonian system by the theory of generalized Hamiltonian realization. So that, Hamiltonian realization problem for the one-machine infinite-bus power systems with SVC is resolved;2,The L₂ disturbance attenuation problem of Hamilton system is discussed in the dissertation, proposing the control design of L₂ disturbance attenuation for the one-machine infinite-bus power systems with SVC. The digital simulation results verify the effectiveness of the controller;3,Since Hamiltonian function is an energy function, the dissertation also presents a new way for the nonlinear controller design based on energy theory. The digital simulations in different instances results verify the effectiveness of the controller;4,The designs of SVC control systems based DSP is proposed in the dissertation, overcoming deficiencies of tradition single-chip in speed and precision.