Results 171 to 180 of about 1,015 (205)
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Visualization and investigation of unified power flow controller (UPFC) nonlinearity in power flow
2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491), 2004This paper investigates the nonlinearity of unified power flow controller (UPFC) on the power system load flow problem. Since the various UPFC parameters equations are nonlinear, a form of vector presentation in complex power plane is used to visualize the effect of different control parameters of UPFC on line power transfer.
S.A. Nabavi-Niaki, M.R. Iravani
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Damping of power system oscillations with unified power flow controller (UPFC)
IEE Proceedings - Generation, Transmission and Distribution, 2003A comprehensive approach to the design of UPFC controllers (power-flow controller, DC-voltage regulator and damping controller) is presented. Studies reveal that damping is adversely affected by the incorporation of a DC-voltage regulator. Investigations were carried out to understand the relative effectiveness of modulation of the UPFC control signals
N. Tambey, M.L. Kothari
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Control of a Multi-Pulse SVM Based Unified Power Flow Controller (UPFC)
2020 IEEE Region 10 Symposium (TENSYMP), 2020This paper presents the implementation and control of Unified Power Flow Controller (UPFC) to control active and reactive power independently in a transmission line. It is basically consists of two voltage source converters one is Static Synchronous Compensator (STATCOM) and another is Static Synchronous Series Compensator (SSSC).
Muhammad Helal Uddin +2 more
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UPFC-unified power flow controller: theory, modeling, and applications
IEEE Transactions on Power Delivery, 1998This paper describes the theory and the modeling technique of a flexible alternating current transmission systems (FACTS) device, namely, unified power flow controller (UPFC) using an Electromagnetic Transients Program (EMTP) simulation package. The UPFC, in this paper, consists of two solid-state voltage source inverters which are connected through a ...
K.K. Sen, E.J. Stacey
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Nonlinear power system damping control strategies for the unified power flow controller (UPFC)
PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409), 2002In this paper, a nonlinear UPFC damping control strategy based on a combination of PI and fuzzy controllers is proposed to damp low frequency electromechanical power oscillations. The proposed control scheme coordinates the unique power flow control features in different control modes of a UPFC to allow the best damping effects to be achieved.
T.T. Ma, K.L. Lo
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Modeling and transient simulation of Unified Power Flow Controllers (UPFC) in power system
2015 4th International Conference on Electrical Engineering (ICEE), 2015With the growing demand of electricity, at times, it is not possible to erect new lines to face the situation. Flexible AC Transmission System (FACTS) uses the thyristor controlled devices and optimally utilizes the existing power network. FACTS devices play an important role in controlling the reactive and active power flow to the power network and ...
Touhami Abdelouahed, Zidi Sid Ahmed
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Power system security improvement using the unified power flow controller (UPFC)
2006 IEEE Power India Conference, 2006This paper presents an algorithm to find the operating point of UPFCs for the enhancement of system security level. The proposed algorithm minimizes the security index iteratively. The security index indicates the overload level of transmission lines. The sensitivity indicating the change of the index due to the changes in the UPFC real power output is
A. Kazemi +3 more
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Stability Improvement in Power Systems Using Unified Power Flow Controller (UPFC)
Advanced Materials Research, 2013Flexible AC transmission system (FACTS) is a system composed of static equipments used for ac transmission of electric energy to improve the power transfer capability and to enhance controllability of interconnected network. Unified Power Flow Controller (UPFC) is the most widely used FACTS device for providing fast acting reactive power compensation ...
B. Gopinath +2 more
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Operation of the unified power flow controller (UPFC) under practical constraints
IEEE Transactions on Power Delivery, 1998The UPFC is the most versatile and complex power electronic equipment that has emerged for the control and optimization of power flow in electrical power transmission systems. It offers major potential advantages for the static and dynamic operation of transmission lines, but it brings with it major design challenges, both in the power electronics and ...
C.D. Schauder +6 more
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Application of unified power flow controller (UPFC) for damping interarea oscillations
IEEE/PES Transmission and Distribution Conference and Exhibition, 2003This paper investigates the feasibility of application of unified power flow controller to damp out interarea oscillations of a large interconnected power system. An eigen analysis approach is used to design the UPFC controllers for damping interarea oscillations.
S.A. Nabavi Niaki, M. Reza Iravani
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