Power flow control in networks using controllable network transformers

Das, Debrup; Divan, Deepak

doi:10.1109/ecce.2009.5316320

Cited by 22 publications

(5 citation statements)

References 8 publications

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“…Hence, the phase angle of output voltage is controlled by the application of dual virtual quadrature sources (DVQS) technique [110], [111]. The voltage output (V OUT ) of the CNT is given by [112],…”

Section: Controllable Network Transformersmentioning

confidence: 99%

“…The tielines have a susceptibility of getting overloaded and tripped under the influence of disturbances and contingencies. This leads to the change in the direction of power flow, i.e., the flow of power becomes opposite to the network support requirement [7].…”

mentioning

confidence: 99%

“…This is achieved by increasing the utilization of the system using power flow controllers. Different types of power flow controllers have already been suggested by the researchers [7]- [10]. The power flow can be boost with the help of power flow controlling devices in a meshed network.…”

mentioning

confidence: 99%

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A Comprehensive Review of Power Flow Controllers in Interconnected Power System Networks

et al. 2020

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Energy security is one of the most crucial factor in the development of any nation. Interconnections among different power system networks are made to lower the overall price of power generation as well as enhance the reliability and the security of electric power supply. Different types of interconnection technologies are employed, such as AC interconnections, DC interconnections, synchronous interconnections, and asynchronous interconnections. It is necessary to control the power flow between the interconnected electric power networks. The power flow controllers are used to (i) enhance the operational flexibility and controllability of the electric power system networks, (ii) improve the system stability and (iii) accomplish better utilization of existing power transmission systems. These controllers can be built using power electronic devices, electromechanical devices or the hybrid of these devices. In this paper, control techniques for power system networks are discussed. It includes both centralized and decentralized control techniques for power system networks. This paper also presents a comprehensive review of HVDC interconnections, asynchronous AC interconnections, synchronous AC interconnections and different types of power flow controllers used in these interconnections. Moreover, some important and multivariable flexible AC transmission system (FACTS) devices such as UPFC and IPFC are also discussed with their merits and limitations. Finally, a new asynchronous AC link called flexible asynchronous AC link (FASAL) system is also described in detail. At last, a summary of the comparative analysis of power system link and power flow controllers is given based on recent publications. More than 400 research articles and papers on the topic of power transfer control are covered in this review and appended for a quick reference.

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Section: Controllable Network Transformersmentioning

confidence: 99%

mentioning

confidence: 99%

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A Comprehensive Review of Power Flow Controllers in Interconnected Power System Networks

et al. 2020

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“…In general the PE-OLTC can be categorized into 2 major types, a) Full-PE OLTC, in which no mechanical moving part is used [3]- [4]; b) Hybrid-OLTC, in which the function of mechanical switch and power electronic switch are combined for different purpose [5]. Fig.…”

Section: Introductionmentioning

confidence: 99%

A new Hybrid power electronics on-load tap changer for power transformer

Chen

Jonsson

2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Traditional power transformer on-load tap changer (OLTC) works with mechanical switches have issues of electrical contact and mechanical part wearing, as well as speed limit. Full power electronics OLTC (Full-PE-OLTC) have been proposed to improve its performance, but the high cost of semiconductor components have been imposing a bottle neck for its practical application. The concept of hybrid power electronics tap-changer (Hybrid-OLTC) have been proposed for power transformer with relatively lower cost. However, problems remain to be solved to avoid arcing when commutating current from mechanical switch to semiconductor. This paper presents a new Hybrid-OLTC design to enable arc-free commutation of current. Practical design requirements on current and voltage stress level are also discussed with solution provided. Experimental result with 2 tap switches setup is provided to verify the theoretical result, as well as to provide reference data for full system design.

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“…Some equipment such as FACTS (flexible ac transmission systems), HVDC (high voltage direct current) [38], EPRI's IntelliGrid [39], or Controllable Network Transformers from the Georgia Institute of Technology [40] are proposed to improve the partial power flow in synchronized system, but not to control power flow asynchronously nor to be coupled with information.…”

Section: A Differences Between the Digital Grid And Smart Gridsmentioning

confidence: 99%

Digital Grid: Communicative electrical grids of the future

Abe

Taoka

McQuilkin³

2010

2010 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT Europe)

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Abstract-To support a high penetration of intermittent solar and wind power generation, many regions are planning to add new high capacity transmission lines. These additional transmission lines strengthen grid synchronization, but will also increase the grid's short circuit capacity, and furthermore will be very costly. With a highly interconnected grid and variable renewable generation, a small grid failure can easily start cascading outages, resulting in large scale blackout. We introduce the "digital grid," where large synchronous grids are divided into smaller segmented grids which are connected asynchronously, via multileg IP addressed ac/dc/ac converters called digital grid routers. These routers communicate with each other and send power among the segmented grids through existing transmission lines, which have been repurposed as digital grid transmission lines. The digital grid can accept high penetrations of renewable power, prevent cascading outages, accommodate identifiable tagged electricity flows, record those transactions, and trade electricity as a commodity.

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Power flow control in networks using controllable network transformers

Cited by 22 publications

References 8 publications

A Comprehensive Review of Power Flow Controllers in Interconnected Power System Networks

A Comprehensive Review of Power Flow Controllers in Interconnected Power System Networks

A new Hybrid power electronics on-load tap changer for power transformer

Digital Grid: Communicative electrical grids of the future

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