Results 171 to 180 of about 2,466 (210)

Damping of power system oscillations with unified power flow controller (UPFC)

IEE Proceedings - Generation, Transmission and Distribution, 2003
A 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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A novel method of power flow analysis with unified power flow controller (UPFC)

2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077), 2002
This paper presents a novel method for power flow analysis with unified power flow controllers (UPFC). A UPFC power flow model has been proposed, in which the impacts of UPFC devices on the system are modeled as the equivalent loads. According to typical control objectives of UPFCs, several sets of calculation formulas for the equivalent loads are ...
null Hongbo Sun, D.C. Yu, null Chunlei Luo   +2 more
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Control of a Multi-Pulse SVM Based Unified Power Flow Controller (UPFC)

2020 IEEE Region 10 Symposium (TENSYMP), 2020
This 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, Akramul Haque, Asif Mohammed Siddiqee   +2 more
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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), 2004
This 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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Fast reliable unified power flow controller (UPFC) algorithm

Seventh International Conference on AC and DC Transmission, 2001
Growth of electric power demand leads to growth in electric power systems. So AC transmission systems must be controlled fast enough and practical enough to handle the variation of power system conditions. Many traditional controllers were used before with the design of transmission systems but greater operating flexibility and better utilization of ...
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Research on dynamic characteristics of Unified Power Flow Controller (UPFC)

2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2011
Based on the basic principle of Unified Power Flow Controller circuit, give a simple analysis about the principle of power flow control of UPFC, and a detailed simulation model of UPFC considering the charging dynamics of its DC link capacitor is provided.
Yao Shu-jun, Song Xiao-yan, Wang Yan, Yan Yu-xin, Yan Zhi   +4 more
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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), 2002
In 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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Transient stability improvement in power system using unified power flow controller (UPFC)

2013 Fourth International Conference on Computing, Communications and Networking Technologies (ICCCNT), 2013
Flexible AC Transmission Systems (FACTS) technology is the most advanced tool for power flow control in electric network. Unified Power Flow Controller (UPFC) is the most versatile FACTS device for optimization and control of power flow in transmission system.
F. Gopinath Balakrishnan, Suresh Kumar Sreedharan, Juvan Michael   +2 more
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Unified power flow controller (UPFC) based on chopper stabilized multilevel converter

PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972, 2002
A system of class B choppers equalizes the DC voltages of the back-to-back multilevel converters of the UPFC thus removing the constraint that the voltages of the series and the shunt converter must operate at a fixed ratio. This allows the UPFC to operate with independent controls over the real power and the reactive powers on both sides.
null Yiqiang Chen, B. Mwinyiwiwa, Z. Wolanski, null Boon-Teck Ooi   +3 more
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Operation of the unified power flow controller (UPFC) under practical constraints

IEEE Transactions on Power Delivery, 1998
The 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, L. Gyugyi, M.R. Lund, D.M. Hamai, T.R. Rietman, D.R. Torgerson, A. Edris   +6 more
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