A View Synchronous Communication (VSC) service provides applications in a multicast group with 1) reliable message delivery and 2) information about changes in the multicast group membership, in the form of membership views. To elaborate, a VSC service guarantees that the applications that receive the same membership view change receive the same set of group messages before receiving that view ...

A new concept, the multi level voltage/current reinjection is described in this paper. A voltage source converter is proposed, in which the multistep output voltage waveform is achieved by the reinjection of different DC voltage levels via the common neutral point of the converter bridges an 84-pulse voltage source converter (VSC), assembled by combining one twelve-pulse VSC, in conjunction wit...

Custom Power is the application of power electronics to improve the quality of power distribution for sensitive industrial plants. Industries reporting production stops due to voltage disturbances, like short interruptions and voltage dips, include paper mills, semiconductors facilities and other industries with fully automated production. Voltage dips are sudden drops in voltage, with duration...

A possible detrimental effect of onshore series compensation in the GB grid is the appearance of subsynchronous resonance (SSR). In this paper, a control scheme for a VSC-HVDC link capable of damping subsynchronous oscillations is proposed in order to effectively counteract the potential damage caused by SSR in steam turbines. The VSC-HVDC link has been modelled to maintain its primary function...

Large offshore wind farms are recently emerging as promising alternative power sources. Long distances between offshore generation and onshore distribution grid demand new solutions for their connection to the AC network. HVDC systems based on voltage source converters (VSC) are a promising alternative to conventional AC transmission above a certain cable length. This paper presents a new VSC t...

A new model of Interphase Power Controller (IPC) for controlling active power is introduced in this paper. In this model, which is called VSC-based IPC, the voltage source converter (VSC) does the function of the phase shifting transformer (PST) in IPC. This new structure not only has the features of IPC, but also controls the output power effectively when the input power is changed by alternat...

A particular case of a chattering-free variable structure control (VSC) — the equivalent t-suboptimal control — was recently presented for a mechatronic system with one degree of freedom [1]. In this paper, the same principle reducing the drawbacks of conventional VSC design has been applied to the trajectory tracking control of a non-redundant rigid 3-segment leg dynamics. The efficacy and rob...

The organisational performance of software companies has become critically important. While customer requirements are changing and varying ever more frequently, and an effective management of the software process is becoming more and more essential, the appropriateness of current software development models has became questionable. One of the current global trends in software development is tra...

In recent years, distributed generation and a large number of sensitive AC and DC loads have been connected to distribution networks, which introduce a series of challenges to distribution network operators (DNOs). In addition, the advantages of DC distribution networks, such as the energy conservation and emission reduction, mean that the voltage source converter based multi-terminal direct cu...

Genetic contributions to human cognition and behavior are clear but difficult to define. Williams syndrome (WS) provides a unique model for relating single genes to visual-spatial cognition and social behavior. We defined a approximately 1.5 Mb region of approximately 25 genes deleted in >98% of typical WS and then rare small deletions, showing that visual-spatial construction (VSC) in WS was a...