Browse Conferences
Cost evaluation of EHVAC offshore wind farm using intermediate shunt compensation: a parametric study
A double-circuit line using commercially available 400 kV-50 Hz three-core XLPE-insulated submarine cables is considered for the evacuation of up to 1 GW offshore wind generation. Three transmission distances are studied, namely 80 km, 100 ...
Frequency-response Analysis and Compensator Enhancement of Droop Control for VSC-HVDC
DC voltage droop control is suggested by a number of authors for multi-terminal VSC-HVDC systems, due to its power sharing capability and distributed control characteristics. However, the stability and robustness of such a closed-loop droop...
Impact of the DC technology on transmission grids
This paper summarises some of the important challenges power transmission networks will be facing in the near future. Special focus has been laid on the operation of High Voltage Direct Current (HVDC) overhead transmission lines, which are ...
Analysis of overvoltage levels in the rigid bipolar MMC-HVDC configuration
Bipolar high voltage direct current (HVDC) transmission systems based on modular multilevel converters (MMC) are intended to be used in several upcoming projects. This contribution performs a profound analysis of occurring overvoltages in a...
A hybrid cascaded converter applicable for UHVDC transmission and feeding to load centre
This paper proposes a new kind of hybrid cascaded converter for the UHVDC systems connected to load centres. The cascaded converter is formed by the MMCs in seriesparallel connection. When the cascaded converter is applied to the UHVDC syst...
Filterless line commutated converter for HVDC transmission
Conventionally, Line Commutated Converter (LCC) technology for High Voltage DC (HVDC) transmission incorporates AC filters to remove the harmonics generated from converter operation. Traditionally, the filters also provide reactive power su...
DC-DC transformer for interconnecting HVDC grids of different technologies and grounding schemes into an HVDC multi-terminal grid
In this paper, a new DC-DC transformer topology is described and analyzed. The Modular Multilevel DC Transformer (MMDCT) is studied for interconnecting high-voltage direct current (HVDC) systems with different grounding schemes and converte...
Controlling a 33 kV flexible power link in GB's distribution network
In Great Britain, Western Power Distribution is trialling an AC-DC-AC power electronics-based "Flexible Power Link" to interconnect two areas of 33 kV distribution network, balancing real power flows and providing voltage support. This pape...
Multi-zone LVDC distribution systems architecture for facilitating low carbon technologies uptake
Low voltage direct current (LVDC) distribution systems have recently been considered as an alternative approach to provide flexible infrastructure with enhanced controllability to facilitate the integration of low-carbon technologies (LCTs)...
The impact of MVDC upon conventional distance protection schemes in hybrid ac-dc distribution networks
This paper looks at the protection implications of introducing fully controllable, embedded, medium voltage dc (MVDC) power electronic links into power distribution networks. Studies have indicated, protection notwithstanding, that embedded...