Application Of UPFC Research Articles

Voltage Control and Power System Stability Enhancement using UPFC

This paper presents application of UPFC in improving the voltage profile and enhancement of the power system stability. Five bus test system is considered for investigating the effect of UPFC. MATLAB Simulink models of test system and UPFC are developed. In Five bus test system UPFC is incorporated between the bus 1 and 4. Two case studies are taken up; where faults created at two different locations i.e. Bus 4 and 5. For both cases the faults are applied at 1 second and cleared at 1.5 second. Results reveal that, without UPFC, rotor angle oscillations increased in generator and lost synchronism. With UPFC system oscillations damped in 6 seconds and system remained stable. Voltage profile of all 5 buses and rotor angle variations at both generators are analyzed. Thus, it is observed that the stability of system can be improved and voltage profiles flatten significantly with incorporating UPFC.

Research on application scheme of UPFC in UHV power grid based on multi-objective evaluation

UPFC can distribute the line transmission power rationally and improve the stability of power grid operation, which is not only the focus of the current attention of the engineering community, but also the hot spot in the academic field. Aiming at the application of UPFC in UHV power grid, this paper first introduces UPFC’s principle and function. Based on the analysis of the problems in UHV power grid planning, this paper proposes the UPFC application scenarios in UPFC power grid. Then using BPA simulation platform, this paper calculates and analyzes the feasibility of each UPFC alternative location in different scenarios. Finally, based on the fuzzy evaluation, the comprehensive evaluation of each scheme in technical level is carried out. The results show that UPFC has strong capability in improving the transmission capability and improving the system voltage, which can solve the problems that UHV Power Grid will face effectively.

UPFC Device Application on Power System Oscillations to Improve the Damping Performance

UPFC is considered as an important modern device in the flexible ac transmission systems family that provides the controllability and flexibility for transmission lines. It is also capable of enhancing the stability of the power system by the addition of a supplementary damping controller, which can be installed on any control channel of the UPFC inputs to implement the task of power oscillation damping controller. This paper presents the application of UPFC to enhance damping of low frequency oscillations by the simultaneous coordinated design between power system stabilizer and different UPFC supplementary damping controller in order to identify the design that provided the most robust damping performance in a single machine infinite bus. The parameters of the damping controller were tuned in the individual and coordinated design by using a chaotic particle swarm optimization algorithm that optimized the given eigenvalue-based objective function. The results analysis reveals that the proposed coordinated designs have high ability in damping Low-frequency oscillations and improve the system damping over their individual control responses. In addition, the coordinated design PSS & δE provides superior performance in comparison to the all coordinated designs.

Application of UPFC to Improve the FRT Capability of Wind Turbine Generator

Application of UPFC to Improve the FRT Capability of Wind Turbine Generator

05/00156 Application of UPFC for system security improvement under normal and network contingencies: Visakha, K. et al. Electric Power Systems Research, 2004, 70, (1), 46–55

05/00156 Application of UPFC for system security improvement under normal and network contingencies: Visakha, K. et al. Electric Power Systems Research, 2004, 70, (1), 46–55