Fuzzy Logic Controller for strengthening the Voltages in DC Network

Authors: Gundru AlekhyaLahari, Radhika.G

Abstract: In this work, proposed a significant technique in DC distribution system with distributed energy storage (DES). It is reliable method to control the voltage at various dynamic circumstances. Furthermore, the proposed AC and DC distribution system is investigated with virtual inertia and capacitances. It has been situated at the AC microgrid for interfacing with various characteristics as well as to sense promptly when the changes in voltage and frequency of AC grid. In this paper, cascading droop control method with fuzzy is suggested for DES in DC microgrid to mitigate the pressure of voltage deterioration of DC network. The proposed system has designed on MATLAB/Simulink environment. The simulation results disclose that the productive response on mitigating the deviations in voltage and frequency, and enhance the system stability. Fuzzy Logic Controller for strengthening the Voltages in DC Network

Keywords: Distributed energy storage,flexible voltage control strategy,AC and DC networks,fuzzy, voltage stability

Sliding Mode Control with Neutral Networks for Controlling of Wind Power Generation

Authors: Nagamantri uday kumar, k Durga rao, Dr. T Srinivasa rao

Abstract: This paper discuss about the renewable power generation system. Among different sources wind is one of the momentous renewable sources for generating the electric power throughout the world. The toughest task in wind system is to covert the wind energy to load or grid. Hence, power electronic advancements are required for conversion purpose, which contains grid and generator side converters. In this study, suggested the maximum power point tracking (MPPT) approach is implanted for regulating the generator side converter. Moreover, artificial neural network (ANN) method is used with hill climbing search MPPT algorithm for enhancing the speed and accuracy of the system. Likewise, in this work, sliding mode control (SMC) is presented for mitigating the speed at various circumstances, which is performs efficiently rather than other control approaches. The simulation results reveal the greatest performance with proposed control schemes in terms of speed control and accuracy.

Keywords: Wind energy, MPPT, SMC, ANN, Speed control, Accuracy.

Topology Optimization of Gear Box using ANSYS

Authors: P Chandra Rao, M Anil Kumar, M Nirmal Devi Kiran

Abstract: In mechanical transmission systems, gears play major role in transmitting the mechanical power. They operate under high torques or high rotations. these gears are designed with stand stress and forces exerted while operating. A Gear box provide torque multiplication which is widely used in various applications. The aim of this paper is to reduce weight of the conventional gear box without compromising the efficiency by using topology optimization techniques from ANSYS software. Gearbox is designed using PTC CREO parametric and exported to ANSYS. After performing the topology optimization again, the gear box is redesigned and final analysis is performed. Conventional structural steel is selected as material. Analysis is carried out on optimized gear and regular gear. Then by comparing the results the conclusion for optimized gear is selected.

Keywords: Gear box, PTC CREO, ANSYS.

Performance Enhancement of Distribution Network with PV Electric Spring using ANFIS Controller under Grid Fluctuations

Authors: B Lakshminarayana, U Anjaiah, Dr. T Srinivasa Rao

Abstract: This paper presents the electric springs (ES) has introduced in interconnected power system for enhancing the system stability and power qualitywith high penetration level of renewable energy sources. The main task of the ES is to stabilize the grid voltage and natural frequency at various disturbances. In this work, the huge amount of power gathered from PV system, which is directly connected to the grid through ES mechanism. Furthermore, it can achieve the balance the power demand and generation in the presence of losses. In this paper, does not need any supplementary energy storage system because of ES mechanism to mitigate the flaws in PV generation. The system has designed on MATLAB/SIMULINK environment. The simulation results reveal the proposed system performs supremacy role as compared to the other techniques.

Keywords: Electric springs, PV system, Grid, Stability, Renewable energy, ANIS.

Mitigation of Microgrid Frequency Droop Control with Fuzzy based WECS with EV

Authors: L Ramesh, K Durga Rao, Dr. T Srinivasa Rao

Abstract: This paper presents an innovative technique in modern power grids that is to operate the combination of wind generators and plug-in hybrid electric vehicles (PHEVs) for alleviating the difficulties. In spite of all their benefits, these two kinds of sources are restricted by some physical constraints thus, both of these sources are incapable to work efficiently for regulating the primary frequency in grids with alleviated inertia. Nevertheless, the combination of wind generator and PHEVs are protecting the frequency during various circumstance over individual source. In this work, small signal system with fuzzy has suggested to examine the frequency regulation approach. Furthermore, the centralized and distributed control schemes are investigated in the presence of cooperation sources and does not occur any violation. The proposed system is investigated on MATLAB/SIMULINK environment. The suggested approach shown the better performance over other conventional control techniques.

Keywords: wind generator, plug-in hybrid electric vehicles, Fuzzy, Small signal, Sources, Centralized control.

High Priority based Secure Transmission in Spectrum Sharing Relaying Networks with Multiple Antennas

Authors: Akkurada Roja, M S R N Naidu

Abstract: To implement spectrum sharing networks in practice, a number of challenging issues, including security, need to be addressed. On account of the open and dynamic features, spectrum sharing CR networks are vulnerable to various malicious attacks, making secure communications to be a difficult task. In the traditional networks, multiple antenna techniques, which can provide extra spatial degrees of freedom, have been exploited to enhance the security of data transmission. we investigate the secrecy performance of a multi-antenna spectrum sharing relaying network in the presence of an eavesdropper. To exploit the inherent benefits of multiple antenna techniques, MRC/ZFB scheme at the relay is used to improve the security of the considered system. Spectrum Sensing algorithm is introduced after ML equalizer. So it will identified the high priority channel quickly. By this processing we can increase the spectral efficiency is proposed. In doing so, we derive exact and simple asymptotic closed-form expressions for the secrecy outage probability of spectrum sharing relaying wiretap channels with the consideration of both the maximum transmit power constraint and the interference temperature constraint.

Keywords: Barcode, data transfer, differential phase shift keying, orthogonal frequency-division multiplexing (OFDM) modulation.

Design and Analysis of a Novel Amorphous Core transformer in Distribution Networks

Authors: K V Gopalachary

Abstract: This paper defines about alloyed (Amorphous) core of a distribution transformer. Traditionally transformer cores have been constructed of grain orientated steel alloys, but a new material which has an amorphous structure is being used increasingly in distribution transformers. The material offers advantages over traditional materials and transformers using the core material are being used in a wide range of applications. According to the measured results, the lowest core loss occurs with an annealing temperature 360℃ under a dc magnetic field density 800A/m. Besides, no load test, sudden short circuit test, and lightning impulse test are performed to ensure the transformer performance. Finally, at the same specifications and rated power, experimental results are presented for the amorphous alloy SA1 core transformer and traditional silicon steel core transformer.

Keywords: Amorphous materials; Transformer design; Core loss; Exciting power; Annealing.

DC-DC Converter fed BLDC Pumping system with MPPT based Solar PV System

Authors: K V Gopalachary

Abstract: This paper describes about design and integration of solar photovoltaic (SPV) array. The power generated from PV system is fed to brushless DC (BLDC) motor driven water pump through a DC-DC boost converter to enhance efficiency of solar system. Voltage regulator is used in inverter control system to get soft switching and to regulate the voltage given to BLDC motor to get desired speed. The speed control of BLDC motor is performed by PWM (Pulse Width Modulation) control of the voltage source inverter (VSI) using DC link voltage regulator. The test system performance is analyzed in MATLAB/Simulink software environment.

Keywords: MPPT, solar PV array, BLDC motor, Water pump, Voltage source inverter (VSI)

An Advanced Sales Forecasting System using XGBoost Algorithm

Authors: Rashmi Priyanka Saradhi V S, Naresh Nelaturi

Abstract: In this paper we have performed deals gauging for stores utilizing diverse data mining methods. The paper included anticipating the deals on some random day at any store. Keeping in mind the end goal to acclimate ourselves with the paper we have examined past work in the space including Time Series Algorithm and also a spatial methodology. A great deal of investigation was performed on the data to recognize examples and anomalies which would supporter obstruct the forecast calculation. The highlights utilized ran from store data to client data also relate land data. Data mining techniques like Linear Regression, Random Forest Regression and XGBoost were executed and the outcomes analyzed. XGBoost which is an enhanced angle boosting calculation was seen to play out the best at expectation. With effectiveness being the route forward in many enterprises today, we mean to extend our answer for help stores enhance efficiency and increment income by exploiting Data Analysis.Applied just three calculations i.e Time Series algo, irregular backwoods and XGBoost. So there is degree for applying more calculations like time arrangement straight models, KNN Regression, Unobserved Component Model, and Principle Component Regression. By taking the relapse of the considerable number of models for every one of the business data may anticipate the business better. For our situation weighted normal of Random Forest yield and XGBoost gives preferable outcome over individual calculations.

Keywords: Sales Prediction, Linear Regression, XGBoost, Time Series, Gradient Boosting.

Comparison and Analysis of DVR with Different Controlling Methods under Sag Condition in Distribution Network

Authors: Shehnaaz Chandini, G.Vanitha

Abstract: In industries due to power fluctuations and other factors the power quality gets effects in the distribution system. Hence Power Quality is the major concern in case of sensitive loads that are present in Distribution System. One of the most frequently occurring power quality problems in distribution network is voltage sag/swell. The main objective is to compensate voltage sag by using Dynamic Voltage Restorer (DVR), here DVR performance is simulated using four control methods. Those methods are Pre sag compensation method, In phase compensation method, Energy Optimization method, In phase advanced method which are used whenever voltage sag occurs. All the four methods are compared and In phase advanced method has found to be better in compensating magnitude of voltage sag and it is also consuming less power observed from simulation results. The performance of DVR is evaluated using simulation in MATLAB/SIMULINK Software.

Keywords: Power Quality, Distribution System, DVR, compensation methods, MATLAB.
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