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In this paper, multiple flexible AC transmission systems (FACTS) supplementary damping controllers are designed for the enhancement of system small-signal stability under different system operating points. A static var compensator (SVC) and a thyristor-controlled series compensator (TCSC) damping controller are designed sequentially with minimized decoupling effort. This approach is carried out with...
This paper discusses the design of the damping control of FACTS with multiple operating points. The problem of such a damping control design is actually the problem of designing optimal output-feedback controllers for a multi-model system, of which control requirements can be described by nonlinear matrix inequalities (NMI). The design approach can transfer the original NMI into linear matrix inequalities...
In the last decade, various nonlinear control techniques have been applied in FACTS controller design. The performance of nonlinear controllers is influenced by the parameter uncertainty and external disturbance. This paper mainly discusses a novel approach of robust variable structure control (VSC) based series FACTS controller design for damping local mode power system oscillations. The VSC-based...
In this paper, three models of the unified power flow controller (UPFC) suitable for three-phase power flow analysis in polar coordinates are presented. The symmetrical components control model can be used to control the positive-sequence voltage of the shunt bus and the total three-phase active and reactive power flows of the transmission line while the injected shunt voltages and the series voltages...
The interline power flow controller (IPFC) and the generalized unified power flow controller (GUPFC) are two innovative configurations of the convertible static compensator (CSC) of FACTS. In this paper, direct modeling of the practical series or/and shunt operating inequality constraints of the IPFC and the GUPFC in power flow calculations are presented. Special initialization of a solution with...
The present status and future prospects of FACTS devices and HVDC technologies for modernizing future power systems are reviewed and discussed. The power system across continental Europe is continuing to change due to the integration of renewable energy sources into power grids, leading to the growing need for advanced FACTS and HVDC control with the possibility of integration with wide area stability...
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