Voltage Sag Mitigation in Multi-line Transmission System Using Generalized Unified Power Flow Controller

Prakash, Tapan; Nair, N. Kesavan; Krishnan, Soundarajan

doi:10.18000/ijies.30013

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“…2 Other combinations have been introduced in the literature, such as the Generalized UPFC or the Interline UPFC. They all utilize a combination of series and/or parallel connected VSCs in order to provide power flow controllability in more than one line starting from the same substation [43] [44]. Moreover, Back-to-Back systems, such as in HVDC, allow power flow controllability while additionally frequency decoupling of both sides.…”

Section: Fig 22 Possible Compensation Connection Methodsmentioning

confidence: 99%

Custom power active transformer for flexible operation of power systems

Elsaharty¹

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This PhD dissertation proposes a new transformer, i.e., the Custom Power Active Transformer, characterized by a specific design of its magnetic circuit and auxiliary windings which allows shunt and series compensation to the power system in a single monolithic transformer. Such auxiliary windings are regulated using power converters based on power electronics. The power electronics converters are controlled based on the required added services to the power system which includes power flow control between different areas, power quality improvements, inertia emulation and several other services that are applicable through power electronics converters. The objective of the proposed transformer is to enable integration of power electronics to a transformer structure which empowers the transformer with added services aiding the transformer operation and power system flexibility. Single-phase and three-phase structures have been modelled, simulated and experimentally tested through a prototype setup and real-time simulation. The presented structures have been demonstrated to operate for power flow and power quality control applications to reveal the applicability of the proposed transformer for a wide range of compensation systems. Furthermore, benefits of the combined structure, operating limits and selection consideration are revealed. Finally, this PhD dissertation presents the expected prospects of the Custom Power Active Transformer and the possible research areas that would require development for its enhancement. Esta tesis trata de un nuevo Transformador Activo Acondicionador de Potencia, caracterizado porque, además de disponer de los devanados primario y secundario de un transformador convencional, dispone también de unos devanados auxiliares y de un circuito magnético con caminos magnéticos adicionales que permiten controlar a voluntad el flujo magnético en su devanado secundario, con independencia del flujo magnético en el devanado primario, y la Fuerza Magneto-Motriz (FMM) en el devanado primario, con independencia de la FMM en el devanado secundario. Por tanto, siempre que se trabaje con tensiones y corrientes alternas que hagan posible la existencia de inducción magnética, en el transformador descrito controla la tensión del devanado secundario, con independencia de la tensión del devanado primario, y la corriente del devanado primario, con independencia de la corriente del devanado secundario, mediante la regulación de la corriente y la tensión en sus devanados auxiliares. La tensión y la corriente en los devanados auxiliares se controlan mediante convertidores de potencia, los cuales implementan diferentes algoritmos de control en función del servicio que se quiera aportar al sistema eléctrico en el que el transformador está conectado. La utilidad del transformador objeto de esta invención es ofrecer servicios auxiliares a la red eléctrica en que se encuentra conectado para mejorar la capacidad de regulación, la calidad de potencia y la estabilidad en la misma. Se ha demostrado que las estructuras presentadas funcionan para aplicaciones de control de calidad de potencia y flujo de potencia para revelar la aplicabilidad del transformador propuesto para una amplia gama de sistemas de compensación. Además, se revelan los beneficios de la estructura combinada, los límites operativos y la consideración de la selección. Finalmente, esta tesis presenta las perspectivas esperadas de Transformador Activo Acondicionador de Potencia y las posibles áreas de investigación que requerirían desarrollo para su mejora.

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Section: Fig 22 Possible Compensation Connection Methodsmentioning

confidence: 99%

Custom power active transformer for flexible operation of power systems

Elsaharty¹

View full text Add to dashboard Cite

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Voltage Sag Mitigation in Multi-line Transmission System Using Generalized Unified Power Flow Controller

Cited by 1 publication

References 0 publications

Custom power active transformer for flexible operation of power systems

Custom power active transformer for flexible operation of power systems

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