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This paper evaluates the capability, compatibility, and usability of Hardware-in-the-Loop platforms for DC-DC converter. This was accomplished by interfacing the platforms with a physical power stage as well as a controller. The employed platforms are Hi-Rel Power-pole board, Texas Instruments Digital Controller, RTDS, OPAL-RT, dSPACE, and Typhoon. Two sets of experimentation were performed: the power...
Since passing its commissioning tests in early August 2011, the flexible pulsed dc current source (FPDCS) at ETH's high voltage laboratory has enabled research in different areas of HVDC switchgear as well as its applications with an unprecedented variability and flexibility, establishing many new research opportunities. Over the course of five years of continuous use, a significant number of incremental...
Network performance evaluation tools play important roles in network researches. However, most tools will cause highly CPU utilization and high monetary cost. Moreover, it is not easy to set up a test environment anytime and anywhere. To solve this problem, we build a lightweight network performance evaluation tool, SDNort, through the OpenFlow architecture. Through our evaluation tool, users can...
In modern networks, faults in the network state, e.g., loops, black holes and access control violations that make services unavailable, arise commonly. To ensure networks' correctness, existing approaches verify network-wide invariants. However, these approaches cannot detect or prevent faults immediately as they arise, so that network performance is not affected. In this paper, we present a data...
The memristor was originally defined as one of the fundamental electrical elements which provided the vacant connection between charge and flux. So far, most of the research has concentrated on the unique features of the individual devices. And the overall behavior of the multiple memristive systems has not been fully studied. Especially, the lack of corresponding fault diagnosis method for complex...
This paper mainly describes an automatic test system which is used to measure the performance and parameters of the TWT. The operating frequency of this system is 2GHz–18GHz, and its maximum power is 400W. This system consists of hardware test system and test software. The characteristic of the hardware part is the use of a switch matrix composed of microwave switches, which can automatically switch...
Islanded operation of HVDC sending system can reduce the influence of HVDC fault on the parallel AC system, enhance the security of the system and increase the transmission capacity. Due to relatively small system inertia and ESCR, there are difficulties of the frequency and voltage control in the islanded sending system. The conventional analysis are focuses on the process after HVDC bipolar trip...
This paper describes how using a phase switching technique can produce a low distortion signal from an Arbitrary Waveform Generator (AWG), and how this technique aligns the performance of the AWGs between testers, to evaluate the Total Harmonic Distortion (THD) performance of Analogue-to-Digital Converters (ADCs). Once a device has been characterized and correlated to the bench, the test engineer...
Software Defined Networking has become extremely hot both in academia and industry. Most of the SDN protocol is the OpenFlow protocol in the southbound interface. But bue to different manufacturers may have different understanding to the OpenFlow protocol and lead to the implementation may be different. So OpenFlow protocol conformance testing is becoming more important. This paper first introduces...
The increasing scope of electrical equipment in an offshore facility without turbo-driven End-Users has a known impact on the design of such facilities that has been discussed in the recent years [1]. The intent of this paper is to recall the historical events and present the specificities of such project execution from Vendor delivery (equipment FAT) until start-up of the facility (first oil and...
Voltage source inverters are essential systems in many applications. Thus, the diagnosis of the faults that could appear in these systems allows detecting, isolating, and identifying the faults. In this context the teaching of this subject is becoming very important. However, laboratory experience is fundamental in order to provide a real understanding of this subject. This paper presents a computer...
In this paper, the EMI (Electro-Magnetic Interference) noise caused by the switching of the Superjunction DMOS in the flyback converter system is investigated. It is found that the radiation noise during the turn-on process is more severe than that during the turn-off process, and the turn-on behavior is not just affected by the CGS (gate source capacitance) and RG (gate driving resistance). To prove...
The High-Capacity Central VoIP switch designed by Netas, provides infrastructure and oppurtunities for integration of TDM/ATM networks and new generation IP technologies. Firstly, this new VoIP switch has been deployed for transformation of residental lines into IP networks. While the residental line network transformation is going on, it is seen that the central switches also require more trank carriers...
To enable the widespread adoption of GaN products, the industry needs to be convinced of product-level reliability. The difficulty with product-level reliability lies with the diverse range of products and use conditions, a limited ability for system-level acceleration, and the complication from non-GaN system failures. For power management applications, however, it is possible to identify fundamental...
Power consumption in test becomes a higher barrier for consideration in test of any combinational circuit is high during test mode as in its normal mode of functioning as enormous power dissipation seriously affects the chip reliability. Many techniques are proposed to lower down the test power. In scan based design, rippling transition created by test patterns shifting along the scan chain not only...
The latest virtual instrument and automatic test technology are adopted. One set of UAV avionics automatic test system for comprehensively testing radio altimeter, diastimeter anti-collision and alarm system, radio compass and multi-mode receiver is designed based on PXI module and GPIB instrument. Realization concept of key technologies, such as software and hardware design method, interface adaptation,...
The paper identifies more of the developing issues in relay testing - what has previously been well understood protection elements/functions used in designing feeder protection systems has become intertwined with modern complex programmable logic. The core issue is the same modern algorithms and combined protection element scheme logic that enables modern feeder protection to operate securely and...
Linux container virtualisation is gaining momentum as lightweight technology to support cloud and distributed computing. Applications relying on container architectures might at times rely on inter-container communication, and container networking solutions are emerging to address this need. Containers can be networked together as part of an overlay network, or with actual links from the container...
Built-in self-repair (BISR) concept is widely utilized and proven by industry to increase the reliability of regular structures such as memory cores. The idea of using this concept in mostly irregular structures such as logic cores is quite new and represents a challenging task with many problems involved; e.g. the identification of regular parts in a logic core suitable for reconfiguration, excessive...
Modular multilevel converters (MMCs) for high power applications may contain over a thousand submodules. In situations such as submodule design or innovation, to build a full system with as many levels to test the submodule is time consuming and costly. To solve the problem, testing schemes have been developed to allow individual submodules to be tested without a complete MMC system. This paper presents...
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