Results 151 to 160 of about 433 (184)
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Dynamic decoupled compensator for UPFC control
Proceedings. International Conference on Power System Technology, 2003It has been reported that there is a strong dynamic interaction between the active and reactive power flow through a transmission line when they are controlled by a unified power flow controller. This paper proposes a dynamic decoupled (DD) compensator, used in conjunction with a proportional-integral (PI) controller, to eliminate the dynamic ...
C.M. Yam, M.H. Haque
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A Study on Nonlinear Decoupling Controller for UPFC
Applied Mechanics and Materials, 2014In the d-q coordinate system, UPFC mathematical model reveals a nonlinear system with features of a multi-variable, strong coupling, and more interference. In view of these system characteristics, the paper presents a nonlinear overlapping decoupled strategy with better stability and dynamic performance for UPFC control.
Zhi Bin Chen, Yan Ma, Bo Wen Su
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การประเมินผลกระทบของ UPFC ที่มีต่อความเชื่อถือได้ของระบบไฟฟ้ากำลัง
Unified Power Flow Controller (UPFC) เป็นอุปกรณ์ทางอิเล็กทรอนิกส์กำลังประเภทหนึ่งที่สามารถควบคุมการไหลของกำลังไฟฟ้าจริง ควบคุมการไหลของกำลังไฟฟ้ารีแอกทีฟ และควบคุมระดับแรงดันที่บัสได้ เนื่องจากคุณสมบัติที่ดีในการควบคุมดังกล่าวข้างต้น จึงมีแนวคิดที่จะนำอุปกรณ์ UPFC มาติดตั้งในระบบไฟฟ้าเพื่อปรับปรุงสมรรถนะของระบบไฟฟ้ากำลัง อย่างไรก็ตามผลการปรับปรุงคุณสมบัopenaire +1 more source
Wide-Area Signal-Based OptimalNeurocontroller for a UPFC
IEEE Transactions on Power Delivery, 2008The design and implementation of an optimal neurocontroller for a flexible AC transmission device - the unified power flow controller (UPFC) is presented in this paper. Wide area signals in a power system are used to provide auxiliary control to a UPFC in order to achieve enhanced damping of system oscillations.
Swakshar Ray, Ganesh K. Venayagamoorthy
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Stability-constrained operation for UPFC devices
2001 IEEE/PES Transmission and Distribution Conference and Exposition. Developing New Perspectives (Cat. No.01CH37294), 2002Improper operations of UPFC can make power system lose its synchronism. This paper explores the principle of this stability problem, and a simple system with single UPFC is set up to demonstrate the existence of such stability problems. An algorithm is proposed to determine whether a UPFC operation is stability constrained or not.
Wu, Xiaohe, Qu, Zhihua, Mohapatra, R. N.
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Multi-level controller design for UPFC
Proceedings. International Conference on Power System Technology, 2003This paper presents a two-level controller design for UPFC, i.e., internal level controller and external level controller. A switch is designed in the external level to determine the functional operation of UPFC. The external level controller is a conventional PI controller to provide the references signals for the internal level.
null Hua Xie +4 more
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Design of UPFC controllers for a multimachine system
IEEE PES Power Systems Conference and Exposition, 2004., 2005This paper presents a comprehensive approach for the design of UPFC controllers (i.e. power flow controller, DC voltage regulator and damping controller) for a multimachine system. UPFC controllers have been designed in the presence of conventional PSS. The interaction between the UPFC controllers and PSS has been studied.
M.L. Kothari, N. Tambey
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Modeling and real‐time simulation of UPFC
Electrical Engineering in Japan, 2006AbstractWe have developed a digital real‐time simulator of Power Electronics Controllers, so‐called FACTS (Flexible AC Transmission Systems) Controllers and/or Custom Power by using MATLABTM/SIMULINKTM and dSPACETM System. This paper describes the modeling and the calculation accuracy of a UPFC (Unified Power Flow Controller) model.
Misao Kimura +5 more
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