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This paper deals with the analysis and design of controllers for speed control loops. Taking a steam turbine as an example the design of robust control systems and the examination of uncertain plant parameters will be carried out by graphically representing the controller and the plant parameters. The analysis of the plant and the controller design is supported by a power plant simulation system.
Quantum-dot Cellular Automata (QCA) is an emerging technology for nano-scale computing. There is an ever increasing demand for reliable data transmission over telecommunication networking systems. The researchers are focusing on developing nano-devices that can detect/check errors during information communication. In this paper novel 3-bit odd- and even-parity generators and checkers using QCA nanotechnology,...
In wireless communication systems like mobile or satellite network a specified band is allotted. Each network has its own allotted spectrum for safe and secure communication. Transferring secure data and receiving it is important and difficult task. Secure transmission of data needs to hide the message signals. Such security to message signal is provided by adding a random noise sequences to it, i...
In [3], we laid out the vision of a novel graph query processing paradigm, where visual subgraph query formulation is interleaved (or “blended”) with query processing by exploiting the latency offered by the gui. Our recent attempts at implementing this vision [6], [7] do not provide any robust framework to systematically investigate the performance of this novel paradigm. This is because it is prohibitively...
Conventionally, the frequency of the power system is controlled by matching the electric supply to the varying demand. Some recent studies demonstrated that demand response (DR) can contribute to the frequency control equally to the generating units. However, to a great extent, the performance depends on the controller design and parameter selection. In this paper, a comprehensive DR control scheme...
This paper focuses on black-start of power system with turbine based combined cooling, heating and power (CCHP) systems as start units. Firstly, the relation among inrush current, the capacity of CCHP systems and transformers are researched and summarized by building models and running simulations in PSCAD. Then three typical black-start cases are designed based on the distribution network, and simulation...
This paper introduces the project Energy4Growing which aims to set up a hybrid micro-grid to supply power to a school in rural Tanzania. It describes the results of the early project actions which concerned: (i) monitoring of the actual school power supply system; (ii) first step development of a new model which addresses the simulation of the electro-mechanical operation and dynamic behavior within...
Sustained load growth in electric power industry has resulted in intensive usage of grid assets including transmission system. Over the years, the transmission infrastructure is unable to evolve at the same proportionate which leads to diminishing reserve capacity in a transmission system. This leads to frequent congestions in the grid. Therefore, congestion management has become vital to maintain...
The expected increase in penetration of renewables in the upcoming decade urges the electricity market to introduce new products — in particular, flexible ramping products — to accommodate their variability and intermittency. While CAISO and MISO are leading the design, it is not clear how such products may affect the electricity market. There has been extensive works investigating the cost incurred...
The complexity of heterogeneous systems has been increased during last years. One challenge of designing these systems is to deal with the application of methodologies based on Model Driven Architecture (MDA). MDA is a development framework that enables the description of systems by means of different models with transformations. This is an important area of research and consists on developping methodologies...
Dual Tone Multi Frequency signal detection is an important to developing for telecommunication equipment. "This is a standard where keystrokes from the telephone keypad are translated into dual tone signals over the audio link". FPGA has gains very popularity in recent years due to their reprogram ability and flexibility. This paper presents a new type of ZYBO Board ZYNQ 7000 series FPGA...
Integrated renewable energy systems (IRES) are increasingly being installed where the grid extension are considered uneconomical. Modeling of IRES is highly site specific and dependent on locally available renewable energy resources and load profile. This study proposes solar, biomass and biogas based IRES model for remote rural areas in Karnataka, India. For this study, seven villages of Chamarajanagar...
Communication in today's world is made efficient by digital data transmission. The digital communication employs parity generator at the source and parity checker at destination to ensure an error free transmission. This paper proposes the design of a 3-bit reversible even parity checker and generator using the basic reversible gates. The parity checker and generator circuit is designed using the...
With the increase in wireless communication technology, encryption of information sent has become a major concern. This involves both the software level and hardware level encryption. GSM was the first cellular system that paid attention to secure mobile communication. Before the advent of GSM the cellular system had no particular security. The GSM voice calls are encrypted using a family of algorithms...
In this paper, we proposed a new mathematical model of the I-V characteristic of a faulty photovoltaic generator. It presents its behavior in normal and faulty operations. In particular, when its basic components such as cells, bypass and blocking diodes are subjected to the impedance or reversed polarity faults. The developed model of the faulty PV generator will allow studying of the I-V characteristic,...
In this paper, we proposed a new mathematical model of a faulty photovoltaic generator operation. It presents its behavior, when it's subjected to the open-circuit and the short-circuit faults at its basic components as: cells, bypass diodes and blocking diodes. Such kind of modeling will allow developing fault detection and diagnosis methods. Indeed, the proposed model will be used to set normal...
In this paper, we address the communication overhead problem between OpenFlow controllers and switches due to table-miss in a flow table. For dealing with table-miss, the switch informs the controller by sending a packet-in message to make the controller perform further actions. However, this packet-in procedure to deal with table-miss may cause a controller overhead when one controller has to process...
The paper presents the importance of the steam generator in the operation of power plants, stressing the importance of their management and automation to increase energy efficiency of each link in the chain. It presents mathematical model in absolute units from the air preheater. Modelling is based on physical model of the air preheater steam generator, simplifying assumptions adopted and the conservation...
In this paper, a study of a decentralized production of electricity from wind energy is suggested. We propose a mathematical modeling and simulation in MATLAB/Simulink of a wind generator with variable speed. The system considered is composed of a DC machine emulating the turbine, a permanent magnet synchronous machine, and a PWM power converter.
Several linear synchronous generators for the exploitation of sea wave energy have been proposed. Such machines do not require reactive power for the magnetization since they use permanent magnets for the excitation. The use of permanent magnets in a rough environment such as the marine environment may be a very weak point in the application of these kind of devices. In order to overcome this difficulty,...
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