The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Aircraft Arrester Barrier Systems (AABS) are very important for the purpose of arresting combat aircrafts due to aborted take-off and emergency landings. This system is installed near the end of runways. Energy Absorbing System (EAS) is one of the important subsystems of AABS. There is no control on energy absorption during operation of an aircraft emergency arrestment in conventional EAS. It is highly...
In a real system, power system planners need to handle vast data during the power system restoration process. It is difficult and complex to make most advantageous decisions in a shorter time. This paper proposes a comprehensive and integrated network optimization scheme, which will speed up the process of power system restoration. The proposed scheme is applied on IEEE 30 bus system to demonstrate...
The solar photovoltaic power generation is one of the fast growing renewable energy source of electrical power. There are two main types of solar PV power generation systems: grid connected and off-grid systems. Grid connected systems are referred as distributed generators as they feed electrical power into the utility grid from various stations. The grid connected systems create certain problems...
Savonius type wind turbine is considered suitable for power generation from low speed fluid flows i.e. canal and river systems. However it suffers from a poor efficiency. Lot of hydro potential in canal and rivers exists in India where Savonius type rotor as hydrokinetic turbine may be used. In order to minimize the static torque deviation and to enhance the performance of Savonius Rotor, continual...
In reliability engineering component importance measures (CIM) is used for prioritization of system component for system reliability improvement, maintenance and system risk etc. Most of the literature on component importance measure deals with different importance measures without considering cost [1][15][23-25]. Practically redundancy is most useful way of improving system reliability. In this paper,...
In order to investigate small wind turbines, a comprehensive knowledge of mechanical and electrical parameters is required. Permanent Magnet Synchronous Generator (PMSG) is one of the kinds which are widely used for variable speed and direct driven wind power generating. In order to predict the amount of power that can be extracted by the wind turbine in a concerned area the knowledge of wind speed...
In process industries, parallel cascade control structures are widely used to improve the dynamic performance in the presence of disturbances. Majority of the parallel cascade tuning strategies reported in the literature focuses on stable process models. Hence, this article presents an improved tuning strategy for time delayed integrating process models. The proposed parallel cascade control structure...
In large electrical power generation systems the integrated operation of hydro and thermal power stations is considered to be more economical as compared to thermal power generation. Integrated operation results in optimum utilization of all energy sources in the most economical manner, to provide an uninterrupted supply to the consumers. Through a case study present paper aims at optimizing traditional...
The aim of this research is to find out how the electricity consumption can be reduced by reduction in the heat load. In furtherance of our aim, a cold storage has been taken for study and with the help of insulation in the cold storage; heat load has been reduced as it lowers the temperature. Several methods and materials have been discussed in this research and also provide the method of selection...
A number of situations exist where it is not possible for a human operator to do an activity on his/her own, due to a level of danger or difficulty involved. They may involve taking readings from an active volcano, entering a building on fire, diffusing a bomb, or collecting a radioactive sample. Rather than compromising on human lives, it is better to employ robotic systems for performing difficult...
In this paper, an optimal design PID controller for automatic voltage regulator (AVR) using gravitational search algorithm (GSA) is presented. In the present work, a priority based error magnification technique is used. This technique emphasizes on the need of prioritizing certain characteristics of transient response of an AVR system. The proposed method consists of a fitness function that helps...
The Saddle-Node Bifurcation (SNB) is one of the most popular voltage stability indexes by which weaker buses or lines can be determined. Gradually increasing the load, the SNB point is determined using the modified Continuation Power Flow (MCPF) algorithm considering the practical security constraints. The three different sets of the security limits (i.e. three cases) are judged for the voltage stability...
Distance relay may maloperate during power swing condition which can arise due to variation of heavy load and switching of adjacent loaded line. Hence, it is necessary to discriminate the fault condition and power swing condition in case of line protection. During fault on transmission line the reactive power & voltage will change drastically compare to power swing condition. This paper demonstrates...
The objective of this paper is to control the frequency of hybrid renewable energy system (HRES) with the help of proportional-integral (PI) controller according to sudden change in wind speed, load demand and solar radiation. A comparison study is presented in this paper between conventional PI controllers and PSO tuned optimal PI controllers. The HRES is combination of multiple generation and storage...
In this paper, the mathematical analysis of proton exchange membrane fuel cell (PEMFC) is discussed, which is helpful to investigate the behavior and modeling of PEMFC. For the investigation of parametric effects, some of the important operating parameters such as temperature, reactants flow pressures (hydrogen and oxygen), membrane internal resistance etc. are considered. The parametric effects of...
The self-adaptive differential evolutionary (SADE) algorithm is developed for controlling and maintaining the power flow using Unified Power Flow Controller (UPFC) under practical security constraints (SCs). The two important tuning parameters of Differential Evolutionary Algorithm (DEA) are so developed that they become automatically adaptive throughout the whole iteration. The UPFC is modeled considering...
A high-power ultrasonic array transmitter with 144 transmitting elements for 3D measurements in air has been developed. The sound pressure level of 126 dB was obtained at a distance of 5 m in the air with an ultrasonic frequency of 40 kHz. This value is approximately 32 dB higher than that obtained using a single transmitting element. The characteristics of the array transmitter were studied and compared...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.