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Author

Jovitha Jerome

Bio: Jovitha Jerome is an academic researcher from PSG College of Technology. The author has contributed to research in topics: PID controller & Inverter. The author has an hindex of 16, co-authored 60 publications receiving 1080 citations. Previous affiliations of Jovitha Jerome include Coimbatore Institute of Technology & Asian Institute of Technology.


Papers
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Journal ArticleDOI
TL;DR: In this article, an efficient and robust three phase power flow algorithm for application to radial distribution networks is presented. And the proposed method has been tested to analyse several practical distribution networks of various voltage levels and also having high R/X ratio.

235 citations

Journal ArticleDOI
TL;DR: In this article, a robust linear quadratic regulator (LQR) was proposed to stabilize the pendulum in upright position and make the cart system to track the given reference signal even in the presence of disturbance.

138 citations

Journal ArticleDOI
01 Apr 2016
TL;DR: Experimental results substantiate that the weights optimized using APSO, compared to PSO, result in not only reduced tracking error but also improved tracking response with reduced oscillations.
Abstract: LQR weight optimization problem is solved using adaptive particle swarm optimization (APSO) algorithm.The convergence speed and precision of conventional PSO is improved by introducing an adaptive inertia weight strategy based on the success rate of the particles.The performance of APSO tuned LQR is validated on a benchmark 2 DoF laboratory helicopter for trajectory tracking application. This paper deals with the attitude tracking control problem for a 2 DoF laboratory helicopter using optimal linear quadratic regulator (LQR). As the performance of the LQR controller greatly depends on the weighting matrices (Q and R), it is important to select them optimally. However, normally the weighting matrices are selected based on trial and error approach, which not only makes the controller design tedious but also time consuming. Hence, to address the weighting matrices selection problem of LQR, in this paper we propose an adaptive particle swarm optimization (APSO) method to obtain the elements of Q and R matrices. Moreover, to enhance the convergence speed and precision of the conventional PSO, an adaptive inertia weight factor (AIWF) is introduced in the velocity update equation of PSO. One of the key features of the AIWF is that unlike the standard PSO in which the inertia weight is kept constant throughout the optimization process, the weights are varied adaptively according to the success rate of the particles towards the optimum value. The proposed APSO based LQR control strategy is applied for pitch and yaw axes control of 2 Degrees of Freedom (DoF) laboratory helicopter workstation, which is a highly nonlinear and unstable system. Experimental results substantiate that the weights optimized using APSO, compared to PSO, result in not only reduced tracking error but also improved tracking response with reduced oscillations.

102 citations

Journal ArticleDOI
TL;DR: In this article, the identification of power signal disturbances using the S Transform and TT Transform is discussed and the results of the transformation are generated as a pattern for each of the power signal disturbance is unique in nature.

86 citations

Journal ArticleDOI
TL;DR: In this paper, the stabilization and trajectory tracking of magnetic levitation system using PID controller whose controller gains are determined via Linear Quadratic Regulator (LQR) approach is considered.

75 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors comprehensively review and classify various step-up dc-dc converters based on their characteristics and voltage-boosting techniques, and discuss the advantages and disadvantages of these voltage boosting techniques and associated converters.
Abstract: DC–DC converters with voltage boost capability are widely used in a large number of power conversion applications, from fraction-of-volt to tens of thousands of volts at power levels from milliwatts to megawatts. The literature has reported on various voltage-boosting techniques, in which fundamental energy storing elements (inductors and capacitors) and/or transformers in conjunction with switch(es) and diode(s) are utilized in the circuit. These techniques include switched capacitor (charge pump), voltage multiplier, switched inductor/voltage lift, magnetic coupling, and multistage/-level, and each has its own merits and demerits depending on application, in terms of cost, complexity, power density, reliability, and efficiency. To meet the growing demand for such applications, new power converter topologies that use the above voltage-boosting techniques, as well as some active and passive components, are continuously being proposed. The permutations and combinations of the various voltage-boosting techniques with additional components in a circuit allow for numerous new topologies and configurations, which are often confusing and difficult to follow. Therefore, to present a clear picture on the general law and framework of the development of next-generation step-up dc–dc converters, this paper aims to comprehensively review and classify various step-up dc–dc converters based on their characteristics and voltage-boosting techniques. In addition, the advantages and disadvantages of these voltage-boosting techniques and associated converters are discussed in detail. Finally, broad applications of dc–dc converters are presented and summarized with comparative study of different voltage-boosting techniques.

1,230 citations

Journal ArticleDOI
TL;DR: In this paper, the most common multilevel inverter topologies and control schemes have been reviewed, and the selection of topology and control techniques may vary according to power demands of inverter.

574 citations

Journal ArticleDOI
TL;DR: A comprehensive review of signal processing and intelligent techniques for automatic classification of the power quality (PQ) events and an effect of noise on detection and classification of disturbances is presented in this paper.
Abstract: Requirement of green supply with higher quality has been consumers’ demand around the globe The electrical power system is expected to deliver undistorted sinusoidal rated voltage and current continuously at rated frequency to the consumers This paper presents a comprehensive review of signal processing and intelligent techniques for automatic classification of the power quality (PQ) events and an effect of noise on detection and classification of disturbances It is intended to provide a wide spectrum on the status of detection and classification of PQ disturbances as well as an effect of noise on detection and classification of PQ events to the researchers, designers and engineers working on power quality More than 150 research publications on detection and classification techniques of PQ disturbances have been critically examined, classified and listed for quick reference

326 citations

Journal ArticleDOI
TL;DR: Fireworks Algorithm is used to simultaneously reconfigure and allocate optimal DG units in a distribution network using a new swarm intelligence based optimization algorithm conceptualized using the fireworks explosion process of searching for a best location of sparks.

281 citations

Patent
06 Dec 2007
TL;DR: A monitoring system and method for monitoring performance of individual powers sources in a distributed power source system is presented in this paper, where a monitoring module is coupled to each of the power sources or to each string of serially connected power sources to monitor and collect data regarding current, voltage, temperature and other environmental factors at the power source.
Abstract: A monitoring system and method for monitoring performance of individual powers sources in a distributed power source system A monitoring module is coupled to each of the power sources, or to each string of serially connected power sources, to monitor and collect data regarding current, voltage, temperature and other environmental factors at the power source The collected data is transmitted over a power line to a central analysis station for analysis Data collected from each source indicates malfunction or degradation at the source Comparison of data collected from adjacent sources filters for environmental factors impacting neighboring sources such as cloudy days for a solar panel Comparison of data collected from the same source at different times indicates soiling or degradation of the source with time or periodic events such as a moving shade from an adjacent building

268 citations