Installation, commissioning, and operation of the world's first UPFC on the AEP system

Mehraban, A.S.; Edris, A.; Schauder, C.; Provanzana, J.H.

doi:10.1109/icpst.1998.728979

Cited by 31 publications

(16 citation statements)

References 7 publications

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“…The aforementioned discussion indicates that the UPFC or the IPFC devices operating in constant power flow also have a similar effect. The MVA rating of the UPFC or IPFC converter branches is only a small fraction of the power transmitted between the subsystem [21]. On the other hand, the converters in an HVDC link must carry the full load power.…”

Section: A Impact Of Series Branch On Dynamic Performancementioning

confidence: 99%

Damping Performance Analysis of IPFC and UPFC Controllers Using Validated Small-Signal Models

Jiang

Gole

Annakkage

et al. 2011

IEEE Trans. Power Delivery

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The paper discusses the dynamic behavior of two different flexible ac transmission system devices; the interline power-flow controller (IPFC) and the unified power-flow controller (UPFC) in a benchmark system. The small-signal model of the interline power-flow controller is developed and validated using detailed electromagnetic transients simulation. Using this validated model, the damping capabilities of the IPFC and the UPFC are compared and rationalized. From a small-signal dynamics point of view, it is shown that the series branches of these devices essentially segment the network creating a new structure. This structure change may be used to effectively improve system damping without requiring the design of a tuned feedback controller. The IPFCs two series branches in contrast to the UPFC's single series branch permit more opportunities for network segmentation. Hence, the IPFC has greater potential for improving the system's dynamic performance.Index Terms-Decoupled control, electromagnetic transients (EMT), flexible ac transmission system (FACTS), interline power-flow controller (IPFC), small-signal stability, unified power-flow controller (UPFC).

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Section: A Impact Of Series Branch On Dynamic Performancementioning

confidence: 99%

Damping Performance Analysis of IPFC and UPFC Controllers Using Validated Small-Signal Models

Jiang

Gole

Annakkage

et al. 2011

IEEE Trans. Power Delivery

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“…The system is also not modular as the zig-zag transformers need to be redesigned for higher power levels. Due to these drawbacks of UPFCs, there are only two major active UPFC installations in the world today [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Fractionally rated transformer-less unified power flow controllers for interconnecting synchronous AC grids

Gunasekaran

Yang

Peng

2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Recently, a novel transformer-less unified power flow controller (T-UPFC) has been proposed. The T-UPFC is a suitable candidate for performing power flow control in interconnected synchronous AC grids. By means of analytical expressions, this paper provides the overall device power rating of such a system when used to control power flow through the line to its limit. By means of these results, it is shown that the ratings of T-UPFC are only a fraction (two tenths) of that of back-to-back VSC based HVDC converter projects commercially being executed to provide power flow control in interconnected synchronous grids. The analysis and results in this paper illustrate the clear benefits of this technology.

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“…Efficient congestion management has become more difficult to achieve than in previous decades because of the reality of finite energy resources, the influence of environmental concerns, and the difficulties of obtaining permission for constructing new transmission lines. It is well recognized that flexible AC transmission system (FACTS) controllers have the ability of directing power flow around electrical transmission networks [1][2][3], and they have been considered as a cost-effective solution for network congestion [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Optimal location of unified power flow controller for congestion management

Chong¹,

Zhang²,

Godfrey³

et al. 2009

Int Trans Elec Energy Syst

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SUMMARYIn deregulated environments, electricity companies are likely to experience an increase in the number of daily market transactions. High penetration of renewable energy generation is likely to bring further uncertainty of network management in terms of power flows and voltages where the systems are being operated towards their limits. Subsequently the stressed systems would result in congestion in transmission networks. Therefore, effective means for congestion management of transmission networks will become increasingly important, particularly for transmission system operators (TSOs). The benefits of using flexible AC transmission system (FACTS) controllers on transmission networks for static and dynamic control are well recognized. In this paper, a sensitivity based three-step optimization method, capable of determining the congestion cost, optimal location and rating of a unified power flow controller (UPFC) is presented. A bilateral electricity market model is assumed and the proposed method is illustrated using the IEEE 30 bus system. Results show high congestion cost reductions, which reinforces the UPFC as a viable solution. In addition, it is shown that the sensitivity based method is efficient at identifying the vicinity of the optimal location for installation, as the number of required simulations is kept to a minimum.

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Installation, commissioning, and operation of the world's first UPFC on the AEP system

Cited by 31 publications

References 7 publications

Damping Performance Analysis of IPFC and UPFC Controllers Using Validated Small-Signal Models

Damping Performance Analysis of IPFC and UPFC Controllers Using Validated Small-Signal Models

Fractionally rated transformer-less unified power flow controllers for interconnecting synchronous AC grids

Optimal location of unified power flow controller for congestion management

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