Proceedings ArticleDOI
Variable Frequency Transformer - State of the art review
Farhad Ilahi Bakhsh,Dheeraj Kumar Khatod +1 more
- pp 1012-1017
TLDR
The Variable Frequency Transformer (VFT) as mentioned in this paper is a controllable, bidirectional transmission device that can transfer power in between asynchronous power system networks, where the two separate electrical networks are connected to the stator winding and the rotor winding, respectively.Abstract:
The Variable Frequency Transformer (VFT) is basically a controllable, bidirectional transmission device that can transfer power in-between asynchronous power system networks. The construction of VFT is similar to conventional asynchronous machines, where the two separate electrical networks are connected to the stator winding and the rotor winding, respectively. One power system is connected with the rotor side of the VFT and another power system is connected with the stator side of the VFT. The electrical power is exchanged between the two networks by magnetic coupling through the air gap of the VFT and both are electrically isolated. This paper gives an overview about core components, commissioning, mechanical design, model, operation, analysis and applications of VFT.read more
Citations
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Proceedings ArticleDOI
Identification of observables for future grids - The framework developed in the ELECTRA project
TL;DR: In this paper, a systematic classification and identification of observables for future grids is conducted, where observables are further classified by the characteristic time scale where they are used in the physical power system and observables must be part of so-called Control Triples consisting of control aim, observable, and system input signal.
Detailed requirements and constraints for the control of flexibility
Seppo Hänninen,Anastasios Kyritsis,Ibrahim Abdulhadi,Roman Schwalbe,Thomas Strasser,Michael Kosmecki,Bogdan Sobczak,Robert Rink,Bartosz Kedra,Maclej Wilk,Robert Jankowski,Mattia Marinelli,Junjie Hu,J. Verbeeck,Artjoms Obushevs,Antonio Guagliardi,Marita Blank,Sebastian Lehnhoff,Christoph Mayer,Evangelos Rikos,Fidalgo Jose Nuno,Abdullah Nadar,Kari Mäki,Corentin Evens +23 more
TL;DR: In this categorization, a good tradeoff between generality and specificity is important: the more generic interfaces are, the more applications can use the interface but they can become cumbersome.
Journal ArticleDOI
Sustainable development and applications of variable frequency transformer (VFT)
TL;DR: In this article , a critical review of variable frequency transformers (VFTs) depicting its sustainable development for power system interconnection is presented and the possible gaps for incorporation of VFT in power systems that have not been reported in literature are identified.
Proceedings ArticleDOI
Real Time Analysis of VFT for Asynchronous Power Flow Control using Typhoon HIL
TL;DR: VFT’s simulation model with real time simulation through Typhoon HIL Simulator and its control system has been developed in order to control the power flow between asynchronous power systems which are connected to each other.
Dissertation
Study on the Reactive Power Behaviour of the Variable Frequency Transformer
TL;DR: In this paper, the Variable Frequency Transformer (VFT) concept has been proposed as a solution for interconnecting two asynchronous networks whilst enabling controllable, bi-directional power flow between them.
References
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Proceedings ArticleDOI
Variable frequency transformer - a new alternative for asynchronous power transfer
TL;DR: The variable frequency transformer (VFT) as mentioned in this paper is a controllable, bi-directional transmission device that can transfer power between asynchronous networks, similar to a back-to-back HVDC converter.
Journal ArticleDOI
Reduction of Power Fluctuations of a Large-Scale Grid-Connected Offshore Wind Farm Using a Variable Frequency Transformer
Li Wang,Long-Yi Chen +1 more
TL;DR: In this paper, a variable frequency transformer (VFT) of 100 MW was used to reduce power fluctuations of an equivalent 80-MW aggregated doubly-fed induction generator (DFIG)-based offshore wind farm (OWF) connected to an onshore 120-kV utility grid.
Journal ArticleDOI
Variable Frequency Transformer—Concept and Electromagnetic Design Evaluation
A. Merkhouf,P. Doyon,S. Upadhyay +2 more
TL;DR: In this paper, the basic concept of variable frequency transformer (VFT) is described and an overview of the mechanical and electromagnetic design of a unit having four poles and rated at 100 MW, 17 kV/17 kV, 60 Hz.
Proceedings ArticleDOI
Evaluation of the Performance of Back-to-Back HVDC Converter and Variable Frequency Transformer for Power Flow Control in a Weak Interconnection
TL;DR: In this paper, a back-to-back HVDC system with series compensation external to the converter transformers, and a variable frequency transformer for power flow control feeding or supplying a weak AC network are compared.
Proceedings ArticleDOI
VFT - a smart transmission technology that is compatible with the existing and future grid
TL;DR: The Variable Frequency Transformer (VFT) has proven itself to be compatible with all types of power system equipment and has also shown to enhance the performance of existing devices as discussed by the authors.
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Variable Frequency Transformer—Concept and Electromagnetic Design Evaluation
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