| Recently, Flexible AC Transmission Systems have been widely researched and developed as an effecient technology to improve electric power quality. As one of key technology of FACTS, Advanced Static Var Generator has been the hot research topic of today's Flexible AC Transmission equipment because of its effective control and good compensation performance. This dissertation is based on the theoretic and practical experience gained from the development of ?00Kvar ASVG equipment.This paper analyses the dynamic compensation theory of ASVG and the configuration of its controller. Then, from the point of energy, the dynamic module of ASVG in differential equation form is established. Finally, the negative sequence and harmonic current of ASVG is analyses by switching function, which provides theory to find a right operation resolution under the circumvent of three-phase unbalance.On the foundation of above mathematics model, the sliding model controller of ASVG has been designed according to the sliding model of variable structure theory. The result of simulation analysis shows that the sliding model controller has not only robust performance of control, high stability and minimum response time but also unsensitive quality for the change of load and disturbance of power system. On the other way, it can maintain good damping property for power system.Finally, the controller based on digital signal processor (DSP) for the + 300Kvar ASVG equipment has been designed in this paper. Simulation and debug in laboratory show that the controller can offer effective damping for power system and strengthen systematic voltage stability and merit angle stability because of fully considering power systematic nonlinear property and systematic asymmetrical condition. |
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