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At the moment, PT. PLN (PLN) as national electricity company have to visit customer place to disconnect or switch off (permanent break) the KWh meter if the customer did not pay the billing on time. It is important to design of a system that could automatically disconnect electricity that flow to customer temporary or/and permanent when the bill is not paid by customer while deadline is overdue. In...
This paper proposes a new passive local islanding detection technique for a distributed generation (DG) system connected to a utility grid. In the proposed method the absolute value of angle between the negative sequence components of voltage and current is estimated at the DG end and is used to recognize the islanding condition. The conventional passive methods have the drawback of non-detection...
In modern plant, control system of the electrical network becomes more and more complex and, in terms of number of I/O, reach levels bigger than the process control. In addition, new technologies are coming on the market and normative environment is also evolving quite fast. As an example IEC 61850, initially dedicated to substation automation in very large grid, is introducing some new concepts in...
This work is dedicated to design a power SOI (silicon-on-insulator) MOSFET switch to replace the Mechanical power relays used in Electrical systems. Mechanical relays are relatively large in size, expensive & have slow response time. Presented simulations & measurements show that two bulk MOSFETs in series can replace a mechanical relay in an AC drive, however, losses increase due to the series...
Internet Relay Chat (IRC) is a critical application in military networks for maintaining situational awareness and conducting battle management at all echelons. But these networks are often subject to frequent disconnections, limited bandwidth, and long delays, especially when using satellite services and field radios. Such conditions are inhospitable to TCP, and thus the standard IRC protocol, which...
Video-streaming can now be offered on third-generation (3G) mobile networks. Most research efforts have focused on video download. This paper presents a detailed study of challenges faced for successfully deploying applications requiring life video upload. Both subjective and objective qualities as well as the effects of mobility are analyzed on real 3G networks. Consequently, video profiles are identified...
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