Subsea cable trencher performance on sand dunes: Numerical modelling of the waterjet trenching process and vehicle traction on sand dunes

Numerous offshore wind farms have been constructed recently in the southern part of the North Sea. Their infield and export cables are buried for protection against dropped or dragged objects. In sandy soils, it is common to use tracked remotely operated vehicles, equipped with two water jetting swords. These swords fluidise the seabed and...

Dynamic Analysis of a subsea cable during cable installation: Improving operability of the cable installation for shallow and deep water

The investigation into the dynamic behavior of a cable during installation was done with the aim of improving cable installation for safety, operational and commercial value. In order to increase the operational limit of the vessel during cable installation, the investigation into improvement systems was desired. The workability of a vessel...

Mechanical Behaviour of Cable in Turntable

The offshore wind market is growing rapidly and will take a significant share in the total energy supply. Offshore wind energy is usually generated by large wind turbines. To transport the generated energy to transformer platforms or the mainland large sub-sea power cables are used. These cables are installed by means of a cable installation...

Lightning Induced Overvoltages in Mixed 380 kV OHL-Cable-OHL connections

Transmission of electric energy at high voltage levels is mainly performed by overhead lines. Nowadays, an increasing amount of power grid operators are replacing overhead transmission lines by underground cables. Cable presence in power systems may have consequences for the behavior of the total system, since cables have much larger capacitance...

Differential Protection Modeling of the Randstad 380 kV South Ring High Voltage Cable in ATP - EMTP

Modern transmission power networks consist mainly of High Voltage overhead lines, since the later have proven their high operational reliability. However, technological developments have made it possible to use High Voltage cables, not only in the distribution grids, but also at higher transmission voltage levels. Thus, more mixed configurations...

Analysis of Switching Transient Overvoltage in the Power System of Floating Production Storage and Offloading Vessel

Large transient overvoltages can be caused by the switching operation of vacuum circuit breakers of induction motors. In order to analyze the switching transient overvoltage and use an appropriate protective method in the power system of floating production storage and offloading (FPSO) vessel, the accurate models of electrical equipments are...

Innovative guidance structure: Technical and economical feasibility cable variant

Guidance structures are built in the vicinity of a sluice complex to serve as berth for ships waiting for the sluice to be available. The structure is loaded by the ship and should stop the ship without being damaged. The design of a guidance structure did not significantly change over the last decades. Therefore one could talk about a...

Understanding the dynamics of broadband markets: A comparative case study of Flanders and the Netherlands

The Digital Agenda for Europe sets out clear goals for providing high speed broadband to all its residents, but leaves the implementation of this plan to the individual Member States. Because of large economic, cultural and political differences, the roads to realizing these ambitious goals are varying in between these Member States. This paper...

Transferium Almere 2.0

The project Transferium Almere 2.0 was developed in two separate but tightly connected stages. The networked urban solution and wind informed geometry of main Transferium volumes. The development of urban solution ran in fall term. The solution is reflexing changes needed in development of new cities’ extensions. The current master plans served...

A multi-body dynamics approach to a cable simulator for kites

For the purpose of ultimately building a fully dynamic simulation of kites, an investigation is launched into a viable model of the cable with which the kite is attached to the ground. In the model proposed in this paper, only the slow modes of motion are taken into account due to the fact that only the slow motions have a real effect on the...

Space charge accumulation in polymeric high voltage DC cable systems

One of the intrinsic properties of the polymeric high voltage (HV) direct current (DC) cable insulation is the accumulation of electrostatic charges. Accumulated charges distort the initial Laplacian distribution of the electric field, leading to a local field enhancement that may cause insulation degradation and premature breakdown of the...