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This paper presents the modeling and control of a doubly-fed induction generator (DFIG) driven by a wind turbine on a real time digital simulator. Real time digital simulators are widely used in the electric power industry by utilities, equipment manufacturers and research organizations. In this paper, two scenarios are considered, the first with a detailed switching model of the back-to-back Voltage...
Modular Multilevel Converter (MMC) has served as a promising Voltage Source Converter (VSC) for High Voltage Direct Current (HVDC) applications. In this paper, a new MMC Submodule (SM) topology called Modified Switched Capacitor Sub-Module (MSCSM) is proposed. The MSCSM is able to block the DC fault using the power electronics semiconductor diodes due to its intelligent configuration without the need...
This paper presents the modeling and control of a doubly-fed induction generator (DFIG) driven by a wind turbine on a real time digital simulator. Real time digital simulators are widely used in the electric power industry by utilities, equipment manufacturers and research organizations. In this paper, a real time simulation of a fully detailed model of the wind turbine and the associated power electronics...
Modular multilevel converter (MMC) served as a promising converter for High Voltage Direct Current (HVDC) transmission. However, reliability is one of the most important challenges. Redundant submodules (SMs) are often used to replace the faulty SMs to ensure continuous operation of the scheme and increase the system reliability. In this paper, a fault detection and clearance is proposed for three...
AM fungi occur in soil and in association with roots as communities of organisms that may simultaneously interact with the roots of one or several co-existing plant species. Species of AM fungi differ in their mode of colonisation and their capacity to form hyphae in soil and within the root (Abbott et al. 1992). Although hyphal characteristics may be distinctive for some fungi (Dodd et al...
The emergence and development of big data tools, techniques and systems motivate industries and organizations to embrace and explore research in big data. This is to circumvent the challenges of the traditional database systems. However, the available benchmarks and workloads are for some specific aspect of Information Technology industries, which has differences in nature and complexities with the...
Modular Multilevel converters (MMC) is one of the categories of the voltage source converters (VSC); it has all the VSC advantages over the classical current source converters (CSC), in addition, the multilevel technique and modular construction of the MMC makes it one of the most promising power converter topology for high voltage and high power applications in the near future. This paper discusses...
The value of Big Data largely relies on its analytical outcomes; and MapReduce has so far been the most efficient tool for performing analysis on the data. However, the low level nature of MapReduce programming necessitates the development of High-level abstractions, i.e., High Level Query Languages (HLQL), such as Hive, Pig, JAQL and others. These languages can be categorized as either dataflow based...
This paper presents the findings on TCP performance measurements in the LA process during the deployment of GPRS CS1 and CS2 coding schemes and after the activation of two more coding schemes, CS3 and CS4. The measurements are done under various network scenarios based on userspsila physical locations in one of Malaysiapsilas commercially deployed live GPRS networks. End-to-end evaluation of FTP application...
This paper presents the results of measured TCP performance in one of the commercially deployed live GPRS network in Malaysia under various network scenarios based on userspsila physical locations. End-to-end evaluation of FTP application is used for the assessment. Tracing at the GPRS air interface is done simultaneously, using a proprietary GSM/GPRS air interface testing tool and software. The results...
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