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Many control and monitoring applications including thermostats, doorbells, and security systems utilize 60 Hz transformers with grid-voltage inputs and 16 V to 24 V ac outputs. The new DOE Level VI efficiency standard places stringent requirements on the no-load quiescent loss of grid-interface power supplies, including these low-voltage transformers. This paper explores a low-cost but highly effective...
Technicolor has been investigating how Mixed Reality technology could impact the future of home entertainment. We have designed and implemented a system to extend a standard TV experience with AR content, using a consumer tablet or a headset. A virtual TV mosaic is displayed around the TV screen and used as a GUI to control both TV and MR content. Using this interface, the user is able to switch TV...
In order to take advantage of the assets, Insulator U 120 B Normal hereinafter “Insulator A” and Insulator U 120 BP Anti-Fog hereinafter “Insulator B” are planned to use for 150kV Transmission Line but the result of PLN Research Institute for Sample Test was failed only in Electromechanical Failing Load Test. In order to immediately need and emergency case with availability of Insulator A and Insulator...
Capacitive current switching test is an important test for high voltage ac circuit breaker. In recent years, many problems, such as frequent restrikes under special environment condition and non-sustained disruptive discharge (NSDD) and restrike after more than one cycles of recovery voltage, were met when ultra (extra)-high voltage circuit breaker switching capacitive current in system and test....
Software Defined Networking (SDN) enables a centralised entity - the controller - to monitor the network’s status by collecting traffic statistics such as packets, bytes, etc. Each statistic is associated with a forwarding table entry (FTE) in a switch whose structure and format is specified by the OpenFlow standard (de-facto SDN standard). For a flow with a FTE, its statistic is easily...
This work introduces a general formulation of the reconfiguration problem for untimed discrete-event systems (DES), which can be treated directly by supervisory control theory (SCT). To model the reconfiguration requirements we introduce the concept of reconfiguration specification (RS); here reconfiguration events (RE) are introduced to force a transition from one system configuration to another...
The clock synchronization technologies applied to controlling layer and primary equipment like intelligent switchgear of processing layer in intelligent substation are analyzed in this paper. IEEE1588 message timing mode, which can be accurate to nanosecond, is used as the mode of substation system, in order to fulfill the real-time and accuracy requirements of intelligent switchgears and remote control...
Coordination among workers within a collaborative team environment is a key factor to its success but it is challenging to come up with a general model for relative costs and benefits of coordination. In a typical work environment, teams with sufficient aggregate expertise are selected to work on an incoming sequence of tasks one by one; it is often the case that the cost of coordination among the...
ECN thresholds have limited operational range and very strict scope. Lower thresholds exacerbate the queue underflow while higher thresholds increase the queueing delays. In this paper, an Adaptive ECN (A-ECN) marking scheme is proposed to enhance the performance of ECN. A-ECN can adaptively adjust ECN marking thresholds in different scenarios to achieve good generality. Therefore, network operators...
Finite Control Set Model Predictive Control (FCS-MPC) allows to deal with non-linearities of the system and obtain a fast dynamic response. Therefore FCS-MPC is a good alternative to govern complex power converters or when fast transient operation is required. A problem about the implementation of FCS-MPC is the computational cost, which is bigger for multilevel converters. This paper proposed a new...
There are many problems in traditional verification of transformer turns ratio tester such as switching manually, low efficiency, error prone, manual recording data, and great workload. This paper introduces an automatic verification device and method for transformer turns ratio tester, the device adopts the logic control chip control signals, turns the switch by the relay automaticity, realizes the...
This paper investigates the switching performance of a 1.2 kV half-bridge SiC MOSFET module from Sanrex. Unlike in a standard SiC MOSFET module, where the MOSFET and the anti-parallel diode chips are fabricated separately, in the chosen MOSFET module (FCA150XB120), both the MOSFET and the diode are fabricated on a single chip. The device is characterized under both hard and soft switching conditions...
Recently, modular multilevel conterters (MMC) are also considered for medium voltage (MV) applications, where the number of modules and the switching frequency are relatively low compared to high voltage (HV) applications. In this context, standard modulation methods can cause relatively large output voltage errors. This effect is amplified even more, if the value of the module capacitances is decreased...
A trend has emerged toward the development of critical systems hosted on the Ethernet databus. Ethernet enjoys unprecedented standardization in commercial networks, and a vast network of engineers with training and experience. It is now commonly known that implementations of deterministic Ethernet for avionics networks known as ARINC 664 part 7 exist on several commercial airframes. In other platforms,...
Many applications of the Preisach model need a lot of repeated calculations. Therefore, the algorithm speed is an important program parameter. Two ways of calculation acceleration are considered: improvement of the algorithm and reduction of the Preisach matrix using its specific feature. In the first case, which is universal, the calculation time can decrease about 500 times. In the second case the...
This work analyzes some possible converter switching strategies so as to achieve higher efficiency and better current waveforms in a high power and low cost three-phase and three-level active AC-DC conversion.
The step in cost savings separating low (LV) and medium voltage (MV) drive application has steadily decreased over the last two decades. In addition to the more economical use of MV drives in certain applications, there are compelling technical advantages, and increased reliability is also often realized. This can equate to a decreased total cost of ownership and should be explored when applying drives...
In recent wireless networks, end-nodes are capable of detecting the existence of multiple wireless standards. In this context, it becomes very interesting to design an on-line reconfigurable communication system controlled by a Vertical Handover Algorithm (VHA) that allows selecting the best available wireless standard. In this demo, we propose implementing the Partial Reconfiguration (PR) technique...
A silicon carbide (SiC) vertical field effect transistor (VJFET) with ultra-low feedback capacitance Crss has been developed, which is called as screen grid VJFET (SG-VJFET). The SG-VJFET is a very promising power device because of the superior static characteristics such as normally off, low on-resistance, and high breakdown voltage, furthermore, issueless in terms of gate oxide reliability and long-term...
It is well-known that the active switching of the DC-voltage inside the inverter is the dominant source of high frequency noise. In contrast, the impact of the diode rectifier is often believed to be small due to its low-frequency commutation without active switching. In this work we show that the diode rectifier has in fact a big impact on the noise propagation and therefore also on the EMC-filter...
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