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The thyristor controlled series capacitor (TCSC) is subsynchronous resonance (SSR) neutral in itself. But in a hybrid system which includes both conventional fixed series compensation and TCSC, disturbances may still excite torsional modes. This paper aims to design a supplementary damping controller for the hybrid system to mitigate the SSR. The method and procedure for the syntheses of the controller...
This paper concerns the reliable guaranteed cost control problem of nonlinear uncertain discrete-time systems with time-varying state delay and actuator failures for a given quadratic cost function. The problem is to design a reliable guaranteed cost state feedback control law which can tolerate actuator failures, such that the closed-loop system is asymptotically stable and the closed-loop cost function...
HVDC and FACTS devices have been widely applied in power system for their excellent and flexible control ability. Their contributions to the damping of system oscillations are of great importance for achieving satisfactory system performance. However, previous experience has shown that there may be negative interactions among FACTS devices whose supplementary controllers are designed separately. This...
This paper discusses the fundamental principles of the active and reactive power control for three-level VSC (voltage source converter) based HVDC system. The three-level converter structure is employed to enhance the transmission capacity of the VSC-HVDC system. With the proposed three-level VSC-HVDC system, the corresponding control strategy is presented. Based on this control strategy, appropriate...
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