Indexing

Abstract: The paper presents power quality improvement of DC drives by reduction of circulating current in parallal operation of active filters based on hysteresis current control. As it is a well-known fact that power quality determines the fitness of electrical power to consumer devices, hence an effort has been made to improve power quality in this work. Simulation with the help of MATLAB/Simulink has been done and results obtained are discussed in detail to verify the theoretical results. The multipulse converter was connected with DC drives and was run at no load condition to find out the transient and steady state performances. FFT analysis has been performed and Total Harmonic Distortion (THD) results obtained at different pulses are shown here.

Abstract: The objective of this paper is to provide an source of information on EHV XLPE cable end termination processes. It also describes the brief procedure of 220 KV XLPE single core (1×1200  Cu corrugated Al sheath) cable termination at 400 KV GSS Heerapura (Rajasthan Vidyut Prasaran Nigam Ltd) Jaipur (Raj) India. The realization of high density power transmission in major city areas requires the effective utilization of limited underground space available so the different versions of the termination are designed for operation under severe outdoor conditions and operation voltage up to 550 KV.

Abstract: Surface-contact temperature measurement technology is very successful, but the research on the non-contact temperature measurement technology is relatively less. This paper designs and implements a non-contact temperature measurement system, which uses embedded hardware platform ARM LPC2148 and the system applies ARM embedded IIC (Inter-Integrated Circuit) bus module's communication procedure and control methods. Experimental results show that the system is of high stability, speed, and precision. The system may be widely used in many applications such as fault diagnosis, performance testing, etc.

Abstract: In this paper, an algorithm to solve the optimal unit commitment problem under deregulated environment has been proposed using Particle Swarm Optimization (PSO) intelligent technique accounting economic dispatch constraints.  In the present electric power market, where renewable energy power plants have been included in the system, there is a lot of unpredictability in the demand and generation. This paper presents an improved particle swarm optimization algorithm (IPSO) for power system unit commitment with the consideration of various constraints. IPSO is an extension of the standard particle swarm optimization algorithm (PSO) which uses more particles information to control the mutation operation, and is similar to the social society in that a group of leaders could make better decisions. The program was developed in MATLAB and the proposed method implemented on IEEE 14 bus test system.

Abstract: The challenges our planet faces, particularly climate change and sustainable economic development, are global in nature and so require global solutions. The building sector, which consumes as much as 40% of world’s energy, 12% of its water and contributes 40% of its waste sent to landfill, is the major part of this global problem. Reducing energy use in buildings saves resources and money while reducing pollution and CO2 in the atmosphere. It also leverages even greater savings at power plants. For the average 33-percent-efficient coal-fired power plant, saving a unit of electricity in a building saves three units of fuel at the power plant. So to reduce green house gas emission, government promotes new buildings construction and to retrofit existing buildings while satisfying low energy criteria. This means improving energy efficiency of buildings and energy systems, developing sustainable building concepts and promoting renewable energy sources. “Green” or “sustainable” buildings use key resources like energy, water, materials, and land more efficiently than buildings that are just built to code. With more natural light and better air quality, green buildings typically contribute to improved employee and student health, comfort, and productivity. A green building depletes the natural resources to the minimum during its construction and operation. In this paper an over view of green building is discussed.

Abstract: A cool property that high temperature superconductors possess is something explained by Meissner Effect. Which makes possible the levitation of superconducting magnets, when a magnetic pole of the same polarity is placed facing the former.
In a complete vacuum if the superconductor is rotated at some particular speed probably very less than “c” some point on the rotating object might just be able to cross the temporal barrier.       

Abstract: With very rapid development of wind power technologies and significant growth of wind power capacity installed worldwide, various wind turbine concepts have been developed. The wind energy conversion system is required to be more cost-competitive, so that comparisons of different wind generator systems are necessary. A literature review of different types wind energy conversion systems is presented. First, the modern wind turbines are described with respect to both their control features and drive train types, and their advantages and disadvantages are described. Then, the quantitative comparison and market penetration of different wind generator systems are presented. The promising permanent magnet generator types are also investigated. After that the ongoing trends of wind generator systems and related comparison criteria are discussed.

Abstract: Transmission line fault detection is a very important task because major portion of power system fault occurring in transmission system. This paper represents a fast and reliable method of transmission line shunt fault detection. MATLAB Simulink use for modeled an IEEE 9-bus test power system for case study of various faults. In proposed work Daubechies wavelet is applied for decomposition of fault transients. The application of wavelet analysis helps in accurate classification of the various fault patterns. Wavelet entropy measure based on wavelet analysis is able to observe the unsteady signals and complexity of the system at time-frequency plane.
The result shows that the proposed method is capable to detect all the shunt faults.

Abstract: Modern days have seen vast developments in the field of controller’s .There are various controllers developed these days with various different specifications.  But the only drawback is that, there is no fixed method for the tuning of these controllers, which is necessary for controlling of the system based on the variation of the input or for the changes in the system. In order to overcome this drawback, in this paper we have compared various tuning methods of PID controller for non-linear system. As a non-linear system we have taken the dc motor as a system. For the particular DC motor controller transfer function has been determined and control parameters such as Proportional Gain, Integral Time and Derivative time are identified. They are numerous methods of developing a Proportional Integral and Derivative (PID) Controller, amongst them some methods are adopted in this paper and Comparisons of Time Domain specifications of those controllers has been carried out.

Abstract: The proliferation of power electronics based equipmenthas produced a significant impact on the quality of electric power supply. Conventional power quality mitigation equipment is proving to be inadequate for an increasing number of applications, and this fact has attracted the attention of power engineers to develop dynamic and adjustable solutions to power quality problems. This has led to development of Custom Power Devices (CPD).One modern and very promising CPD that deals with both load current and supply voltage imperfections is the Unified Power Quality Conditioner (UPQC).
This paper investigated the development of UPQC control schemes and algorithms for power quality improvement and implementation of a versatile control strategy to enhance the performance of UPQC. The proposed control scheme gives better steady-state and dynamic response. The validity of the proposed control method is verified by means of MATLAB/SIMULINK.

Abstract: Electrocardiogram is a machine that is used for the detection and the analysis of the peaks of the ECG signal.  ECG signal is used for the detection of various diseases related to the heart. The cardiac arrhythmia shows abnormalities of heart that is considered as the major threat to the human. The peaks that are present in the ECG signal are used for detection of the disease. The R peak of the ECG signal is used for the detection of the disease, the arrhythmia is detected as Tachycardia and Bradycardia. This paper presents a study of the ECG signal, peaks and of the various techniques that are used for the detection of disease.

Abstract: The coin-based mobile battery charger developed in this paper is providing a unique service to the rural public where grid power is not available for partial/full daytime and a source of revenue for site providers. The coin-based mobile battery charger can be quickly and easily installed outside any business premises. The mobile phone market is a vast industry, and has spread into rural areas as a essential means of communication. While the urban population use more sophisticated mobiles with good power batteries lasting for several days, the rural population buy the pre-owned mobile phones that require charging frequently. Many times battery becomes flat in the middle of conversation particularly at inconvenient times when access to a standard charger isn't possible. The coin-based mobile battery chargers are designed to solve this problem. The user has to plug the mobile phone into one of the adapters and insert a coin; the phone will then be given a micro-pulse for charging. It does not bring a mobile from 'dead' to fully charged state. The charging capacity of the mobile is designed with the help of pre-defined values. It is, of course, possible to continue charging the mobile by inserting more coins. This compact and lightweight product is designed to cater for the growing number of rural mobile users worldwide. A suitable microcontroller is programmed for all the controlling applications. The source for charging is obtained from solar energy and back up storage battery in case of non-availability of solar energy.