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This paper presents, a two stage krill herd algorithm (TKHA) to address optimum power flow (OPF) issue in complex power system. Proposed algorithm implemented with two stage initialization approach provide optimal solution of the objective functions individually with less number of iterations which minimize the overall convergence time. The validity of TKHA is tested for a standard test function and...
This paper presents a novel concept to solve optimal power flow (OPF) problem in the presence of series flexible alternating current transmission systems (FACTS) controller which is thyristor controlled series capacitor (TCSC). In the proposed algorithm, a two stage initialization process have been adopted and also it gives optimal solution with less number of generations which results in the reduction...
This paper presents a discrete space vector modulation (DSVM) algorithm based vector controlled induction motor drive for reduced torque and current ripples in steady state. Though, the conventional vector control algorithm gives good transient and steady state response, the complexity involved is more due to the reference frame transformations. Later, the direct torque control (DTC) was developed...
Simple and novel vector based hysteresis current control schemes are presented for vector controlled induction motor drives. The proposed algorithm combines the principles of direct torque control (DTC) and field oriented control (FOC). The proposed algorithm generates the reference currents as per the principle of vector control algorithm. The, the vector based hysteresis comparators integrated with...
Graphical password, text password are authentication of users on websites because of its simplicity and easy. User's passwords are easy to hack by using different malicious programs and threats. First, Users select easy to remember password because nowadays they using many accounts on different websites. To login to websites they need to remember all passwords. So users would choose easy to remember...
The ability to diagnose the integrity of the transformer windings and core through online diagnostic method would be useful for electric utilities who are concerned about the availability and reliability of power transformer. This paper presents results of a study to identify the condition of power transformer windings and core by measuring the vibration signal of outdoor transformer in normal operating...
In this paper, design of autotransformer based 24 Step AC-DC converter fed vector controlled Induction motor drive is presented and its Matlab/Simulink model is given. Also these results are compared with 12-pulse AC-DC converter fed vector controlled Induction motor drive. This paper deals with various multipulse AC-DC converters for improving the power quality in vector-controlled induction motor...
This paper presents comparison of cascaded H-Bridge and multi-level dc link inverter using only a dc power sources. The performance of a seven level multilevel dc link inverter based on sine and space vector pulse width modulation control technique. Performance analysis is made based on the results of simulation study conducted on the operation of the multilevel dc link inverter using MATLAB/SIMULINK...
In India, grid disturbance is a major cause of plant transients in nuclear power plants, and thus having an impact on plant safety. With better regulation and load management, the frequency of grid disturbance has come down substantially with time. Nevertheless the plant transients initiated by Class-IV power supply failure are experienced regularly. Further the incapability of emergency diesel generators'...
In this paper, design of auto transformer based 18 Step AC-DC converter fed vector controlled Switched Reluctance motor drive is presented and its Matlab /Simulink model is given. The design procedure for proposed autotransformers shows the flexibility in the design for making it a cost effective replacement suitable for retrofit applications, where presently a six pulse diode bridge rectifier is...
We have developed a parameterized (fast) simulation for detector optimization and physics reach studies of the proposed SuperB Flavor Factory in Italy. Detector components are modeled as thin sections of planes, cylinders, disks or cones. Particle-material interactions are modeled using simplified cross-sections and formulas. Active detectors are modeled using parameterized response functions. Geometry...
There exists a number of large business critical software systems written in newer languages such as C and Java that are fast becoming legacy and increasingly difficult to maintain. Unlike older monolithic systems, where modularization primarily involves splitting the monolithic code base into modules, for such newer systems which already have some basic modular structure, code decomposition is only...
A number of companies are trying to migrate large monolithic software systems to Service Oriented Architectures. A common approach to do this is to first identify and describe desired services (i.e., create a model), and then to locate portions of code within the existing system that implement the described services. In this paper we describe a detailed case study we undertook to match a model to...
We report on a new approach in the design of CMOS monolithic active pixel sensor (MAPS). We realized a first MAPS prototype chip implementing at the pixel level the standard processing chain commonly used for capacitive detectors. The in-pixel signal processing channel includes a low noise charge preamplifier, a shaper, a discriminator and a latch. This readout approach, realized exploiting the triple...
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