IJEECM Journal of Electrical Engineering (IJEECM-JEE)

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.

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.

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)

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.

PV system integration with grid using fuzzy based H-Bridge multilevel inverter

Authors: Hasen Ali, Dr.T Srinivasa Rao, R Ganesh

Abstract: This paper characterizes another fuzzy based controller based measured fell H-bridge multilevel photovoltaic (PV) inverter for single-or three-phase grid-associated applications. The particular fell multilevel topology enhances the proficiency and adaptability of PV systems. To acknowledge better use of PV modules and maximize the sun based vitality extraction, a disseminated most extreme power point tracking control plan is connected to both single-and three-phase multilevel inverters, which permits free control of each dc-connection voltage. For three-stage network associated applications, PV mismatches may present uneven provided control, leading to lopsided framework current. To unravel this issue, a control scheme with tweak remuneration is likewise proposed. An experimental three-stage seven-level fell H-connect inverter has been built utilizing nine H-connect modules (three modules for every stage). Each H-connect module is associated with a 185-W sun oriented board. Simulation and test results are exhibited to check the possibility of the proposed approach.

Keywords: Fuzzy, Cascaded multilevel inverter, distributed maximum power point (MPP) tracking (MPPT), modular, modulation compensation, photovoltaic (PV).

Study and Analysis of different types of PLLs used in DVR’s for sag swell compensation under grid fault condition

Authors: M Santhosh Kumar, Dr.T Srinivasa Rao, M V Ramana Murty

Abstract: The real system code necessities for the system relationship of appropriated time structures, generally wind and photovoltaic (PV) systems, are ending up being incredibly asking. The transmission system heads (TSOs) are especially worried about the low-voltage-ride-through necessities. Courses of action in view of the foundation of STATCOMs and component voltage controllers (DVRs), and furthermore on front line control functionalities for the current drive converters of scattered time plants, have added to redesign their response under blemished and distorted circumstances and, in this manner, to fulfill these requirements. With a particular true objective to achieve pleasing results with such systems, it is critical to rely on upon exact and speedy system voltage synchronization estimations, which can work under uneven and turned conditions. This paper separates the synchronization capacity of three moved synchronization systems: the decoupled twofold synchronous reference diagram arrange darted circle (PLL), the twofold second demand summed up integrator PLL, and the three-organize enhanced PLL, planned to work under such conditions. Despite the way that distinctive systems in light of repeat darted circles have also been made, PLLs have been picked due to their association with dq0 controllers. In the going with, the unmistakable estimations will be shown additionally, discretized, and their execution will be attempted in an exploratory setup controlled in order to evaluate their precision likewise, execution highlights.

Keywords: Electric variable estimations, electrical designing, recurrence estimation, recurrence bolted circles, consonant examination, observing, synchronization.

PR Controller based VSC for FRT Enhancement of HVDC Distribution Network

Authors: Konada Naga Ravi Kumar, Meesala Shobha

Abstract: This paper proposes a changed current point of confinement methodology (MCLS) and a recurrence hysteresis control (FHC) for enhancing the aggravation ride-through capacity of a VSC-HVDC interface providing aloof mechanical establishments. Since mechanical burdens are more delicate to voltage drops than recurrence deviations, it's fundamental to ensure the solidness of voltage amid extreme flaws. The advancement of the control techniques incorporates three stages. To begin with, the fundamental component that influences the air conditioner voltage in the latent mechanical framework is broke down so as to upgrade the voltage solidness all the more adequately. Besides, as indicated by the scientific outcomes, the MCLS is proposed to build the air conditioner voltage in transient conditions. Thirdly, keeping in mind the end goal to improve the MCLS have a control result, the FHC is added to the VSC controller with the MCLS, which can likewise additionally upgrade the air conditioner voltage of the detached framework. The reenactment tests under metallic single-stage and three-stage deficiencies are done in PSCAD/EMTDC, and the outcomes check the legitimacy of the control strategies.

Keywords: PR Controller, passive industrial installations, voltage stability, Voltage Source Converter (VSC), modified current limit strategy, frequency hysteresis control, SVPWM.
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