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This paper presents thermal characteristics of rotor-side converter (RSC) in doubly-fed induction generator (DFIG) wind turbines (WTs). A numerical power loss and thermal model simulator has been developed to obtain instantaneous junction temperature of power devices for a wide operating range of RSCs. Thermal performance of four RSC candidates, including Si IGBT based 2L / 3L-NPC / 3L-ANPC RSCs and...
In recent years, wireless sensor networks have been applied in many application areas. For some fields that have special timing requirement, only wireless sensor networks can not satisfy the needs of high speed communication. We propose a hybrid wired-cum-wireless sensor network by introducing the Contention-Collision Cancellation (C-CC) access control mode, which is an important access control mode...
Infrastructure as a Service (IaaS) is a service mode of cloud, which provides Virtual Machines (VMs) to customers. With the increasingly fierce competition in market, cloud providers pay more attention to Quality of service (Qos). As the practical measurement costs a large amount of resource, deriving performance metrics from analytical model is a good choice. Recently, Stochastic Petri Net (SPN)...
A physical yet analytical phase change memory (PCM) model simultaneously accounting for thermal and electrical conductivities is presented. Due to the physics based nature of the model, the essential temperature from heating and cooling of PCM during operation is instantaneously updated. More importantly, the model can be applied to non-conventional circuit design technique. We show that for the first...
In this paper, we introduce a pricing model that ensures efficient resource allocation that provides guaranteed quality of service while maximizing profit in multiservice networks. Specifically, a dynamic allocation policy is examined that relies on online measurements while each service class operates under a probabilistic bound delay constraint. We present a rigorous analysis of the properties of...
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