Results 191 to 200 of about 4,868 (226)

The Usage of ICT for an HVDC Overlay Grid

Advanced Science and Technology Letters, 2013
HVDC grids hold such an ex citing yet problematic area for th e world’s future p ower transmission. In this paper, the role of Information and Communication Technology for such an HVDC grid is examined within a Smart Grid communication perspectiv e.
Doli Noviedo, Sven Bohn, Oleksandr Artemenko   +2 more
openaire   +1 more source

DC protection criteria for multi-terminal HVDC system considering transient stability of embedded AC grid [PDF]

International Journal of Electrical Power and Energy Systems
To build up a secure AC/DC power grid, a reliable DC protection system is vital for multi-terminal HVDC systems. However, efficient and reliable DC protection has always been a major challenge.
Birgitte Bak-Jensen, Zhou Liu, Shuju Hu   +2 more
exaly   +3 more sources

Selection of DC voltage controlling station in an HVDC grid [PDF]

Electric Power Systems Research, 2017
This paper proposes a real-time quantitative evaluation of HVDC converters’ in an HVDC grid to select the suitable DC slack converter. This real-time evaluation considers the strength of connecting AC grid and the converter's on-line capacity margin as ...
Davood Babazadeh
exaly   +1 more source

Cyber Physical Approach to HVDC Grid Control

2015
This chapter presents a cyber-physical approach to design of HVDC control system architectures and evolving HVDC grid operation and control modes. In addition, the chapter describes the communication system architectures needed for centralized and distributed operation and control of HVDC grids.
Nordström, Lars, Babazadeh, Davood
openaire   +1 more source

Fault Discrimination in HVDC Grids with Reduced Use of HVDC Circuit Breakers

2018 IEEE Power & Energy Society General Meeting (PESGM), 2018
HVDC grids are currently considered to accommodate the integration of renewable energy sources into the power system. Since HVDC circuit breakers might at present incur a large investment cost, fault clearing strategies with limited use of HVDC circuit breakers have been recently proposed.
Leterme, Willem, Wang, Mian, Van Hertem, Dirk   +2 more
openaire   +1 more source

Challenges and opportunities for a European HVDC grid

Renewable and Sustainable Energy Reviews, 2017
Abstract In 2009 the European governments committed their countries to a reduction in green-house-gas emissions up to 80% by 2050. Consequently, the employment of renewable energies has been strongly encouraged, making the upgrade of the existing AC grid necessary.
Erika Pierri, Ole Binder, Nasser G.A. Hemdan, Michael Kurrat   +3 more
openaire   +1 more source

Short circuit detection in HVDC grids

2016 IEEE Power and Energy Conference at Illinois (PECI), 2016
Diverse grid structures in HVDC systems are generally possible. Though HVDC fault detection methods from overcurrent to derivative detection have recently been proposed, a broad discussion about reasonable fault localization is mostly absent. A MATLAB Simulink model with four different transmission line scenarios was developed for application-oriented ...
Sander, René, Barth, Daniel, Suriyah, Michael R., Leibfried, T.   +3 more
openaire   +2 more sources

An alternative approach to HVDC grid protection

10th IET International Conference on AC and DC Power Transmission (ACDC 2012), 2012
In future HVDC grids, or `Supergrids', high voltage DC circuit breakers will almost certainly be used in order to remove a faulted element of the HVDC Grid whilst allowing power flow to continue on the remaining grid. However, associated with these HVDC circuit breakers will be the need for a means of fast fault detection, location and isolation.
C.D. Barker, R.S. Whitehouse
openaire   +1 more source

Application of DC choppers in HVDC grids

2016 IEEE International Energy Conference (ENERGYCON), 2016
This paper investigates the use and need for DC choppers in VSC HVDC grids. Sudden increases in the DC link voltage, caused by AC grid side voltage drops, can lead to potential damage of the DC equipment. Therefore, DC choppers are currently used in point-to-point links to keep the voltage within safe margins.
Christoph Nentwig, Jens Haubrock, Robert H. Renner, Dirk Van Hertem   +3 more
openaire   +1 more source

Requirements for Fault Protection in HVDC Grids

RE&PQJ
Conventional Voltage Source Converters (VSC) cannot interrupt DC fault currents and DC circuit breakers are not yet commercially available for HVDC power ratings. Thus, the protection of VSC-HVDC systems is still an obstacle for the development of this technology.
null D.M. Larruskain, null O. Abarrategui, null I. Zamora, null G. Buigues, null V. Valverde, null A. Iturregi   +5 more
openaire   +1 more source