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Journal articles on the topic 'Grid Injection'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Djaborebbi, Amina, Boubakeur Zegnini, and Djillali Mahi. "Analysis of the performance of grounding grids buried in heterogeneous soil under impulse current." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 1 (2021): 571. http://dx.doi.org/10.11591/ijeecs.v22.i1.pp571-579.

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The present paper is devoted to analyzing the transient behaviour of simple grounding grids subjected to impulse lightning current. The transmission line method (TLM) involving mutual coupling between conductors will be used. The transient behaviour of grounding grids buried in homogeneous and in heterogeneous soil is going to be evaluated into a complete time domain solution. Different simulations carried out altering, the influence of the grid dimensions, the kind of the ground and the current injection point on the grid voltage and impedance will be presented. Simulation results will be sho

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2

Khorwal, Harish, and Mrs Madhu Upadhyay. "Descriptive Study of Renewable Energy System for Reactive Power Injection and AI Techniques." SMART MOVES JOURNAL IJOSCIENCE 6, no. 1 (2020): 4. http://dx.doi.org/10.24113/ijo-science.v6i1.249.

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Solar Photovoltaic (PV) systems have been in use predominantly since the last decade. Inverter fed PV grid topologies are being used prominently to meet power requirements and to insert renewable forms of energy into power grids. At present, coping with growing electricity demands is a major challenge. This paper presents a detailed review of topological advancements in PV-Grid Tied Inverters along with the advantages, disadvantages and main features of each. The different types of inverters used in the literature in this context are presented. Reactive power is one of the ancillary services p

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Khorwal, Harish, and Mrs Madhu Upadhyay. "Descriptive Study of Renewable Energy System for Reactive Power Injection and AI Techniques." SMART MOVES JOURNAL IJOSCIENCE 6, no. 1 (2020): 37–39. http://dx.doi.org/10.24113/ijoscience.v6i1.249.

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Solar Photovoltaic (PV) systems have been in use predominantly since the last decade. Inverter fed PV grid topologies are being used prominently to meet power requirements and to insert renewable forms of energy into power grids. At present, coping with growing electricity demands is a major challenge. This paper presents a detailed review of topological advancements in PV-Grid Tied Inverters along with the advantages, disadvantages and main features of each. The different types of inverters used in the literature in this context are presented. Reactive power is one of the ancillary services p

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4

Ismail, Fauzan, Asnal Effendi, and Witrionanda Witrionanda. "Power Injection on Single Phase Grid System." ELKHA 11, no. 1 (2019): 47. http://dx.doi.org/10.26418/elkha.v11i1.30932.

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This paper deals with power injection on single phase grid connected inverter. The simple method is introduced to understand the concept of grid connected systems. A phase Lock Loop (PLL) method estimates the phase-angle of grid system. The output of PLL is used to defines Iref , and the current of inverter becomes a feedback (IL). Both current are derived to produce PWM using current mode controller method. As long as the grid system on fault condition like voltage distortion, therefore the single-phase inverter that connected into the grid should change the role and keep stabilization. The v

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Satyanarayana, P. V. V., and P. V. Ramana Rao. "DG integration to distribution system with active power injection control." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 2 (2020): 692. http://dx.doi.org/10.11591/ijpeds.v11.i2.pp692-701.

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Conventional methodology for electrical power generation is vulnerable due to environmental limitations and the availability of fuel. Distributed generation, offering virtuous benefits to the market partakers, is trending in electrical power system in modern era. This paper presents the distributed generation integration to grid with active power injection control. Distributed generation source delivers DC power which is processed through square wave inverter. Inverter circuit is controlled using a simple control technique to match grid code. Fixing the current reference and varying the same,

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6

Bae, Junhyung. "Cost-Effective Placement of Phasor Measurement Units to Defend against False Data Injection Attacks on Power Grid." Energies 13, no. 15 (2020): 3862. http://dx.doi.org/10.3390/en13153862.

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This study presents the phasor measurement unit (PMU) placement strategy in the presence of false data injection attacks which is one of the most serious security threats against power grid. It is focused on applications related to supervisory control and data acquisition (SCADA) systems where measurement data can be easily corrupted by adversaries without getting caught by the system. To safeguard power grids against malicious attacks, procedures have been proposed to facilitate the placement of secure PMUs to defend against false data injection attacks in a highly cost-effective way. It has

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7

Zimann, Felipe J., Eduardo V. Stangler, Francisco A. S. Neves, Alessandro L. Batschauer, and Marcello Mezaroba. "Coordinated Control of Active and Reactive Power Compensation for Voltage Regulation with Enhanced Disturbance Rejection Using Repetitive Vector-Control." Energies 13, no. 11 (2020): 2812. http://dx.doi.org/10.3390/en13112812.

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Voltage profile is one of many aspects that affect power quality in low-voltage distribution feeders. Weak grids have a typically high line impedance which results in remarkable voltage drops. Distribution grids generally have a high R/X ratio, which makes voltage regulation with reactive power compensation less effective than in high-voltage grids. Moreover, these networks are more susceptible to unbalance and harmonic voltage disturbances. This paper proposes an enhanced coordinated control of active and reactive power injected in a distribution grid for voltage regulation. Voltage drop miti

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8

Roinila, Tomi, and Tuomas Messo. "Online Grid-Impedance Measurement Using Ternary-Sequence Injection." IEEE Transactions on Industry Applications 54, no. 5 (2018): 5097–103. http://dx.doi.org/10.1109/tia.2018.2825938.

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9

Aryal, Nabin, and Torben Kvist. "Alternative of Biogas Injection into the Danish Gas Grid System—A Study from Demand Perspective." ChemEngineering 2, no. 3 (2018): 43. http://dx.doi.org/10.3390/chemengineering2030043.

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The Danish government has set an ambitious target to achieve 100% fossil independence across all energy sectors, which demands optimum utilization of renewable energy sources, such as wind and biogas, by 2050. Biogas production has increased, and the upgrading of biogas offers a broad range of applications, such as transportation, and gas grid injection for downstream utilization. The biogas has to meet natural gas quality prior to injection into the gas grid system. The investment costs of the gas grid, upgrading cost, and gas compression costs are the major challenges for integrating the bio

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10

English, J. M., O. B. Toon, and M. J. Mills. "Microphysical simulations of sulfur burdens from stratospheric sulfur geoengineering." Atmospheric Chemistry and Physics 12, no. 10 (2012): 4775–93. http://dx.doi.org/10.5194/acp-12-4775-2012.

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Abstract. Recent microphysical studies suggest that geoengineering by continuous stratospheric injection of SO2 gas may be limited by the growth of the aerosols. We study the efficacy of SO2, H2SO4 and aerosol injections on aerosol mass and optical depth using a three-dimensional general circulation model with sulfur chemistry and sectional aerosol microphysics (WACCM/CARMA). We find increasing injection rates of SO2 in a narrow band around the equator to have limited efficacy while broadening the injecting zone as well as injecting particles instead of SO2 gas increases the sulfate burden for

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11

Singh, Ravi Shankar, Vladimir Ćuk, and Sjef Cobben. "Measurement-Based Distribution Grid Harmonic Impedance Models and Their Uncertainties." Energies 13, no. 16 (2020): 4259. http://dx.doi.org/10.3390/en13164259.

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Aggregated Norton’s equivalent models, with parallel impedance and current injection at different harmonic frequencies are used to model the distribution grid in harmonic studies. These models are derived based on measurements and/or prior knowledge about the grid. The measurement-based distribution (sub-)grid impedance estimation method uses harmonic phasors of 3-phase current and voltage measurements to capture the response of the distribution (sub-)grid before and after an event in the utility side of the grid. However, due to increasing non-linear components in the grid, knowledge about un

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12

Vaccariello, Enrico, Riccardo Trinchero, Igor S. Stievano, and Pierluigi Leone. "A Statistical Assessment of Blending Hydrogen into Gas Networks." Energies 14, no. 16 (2021): 5055. http://dx.doi.org/10.3390/en14165055.

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The deployment of low-carbon hydrogen in gas grids comes with strategic benefits in terms of energy system integration and decarbonization. However, hydrogen thermophysical properties substantially differ from natural gas and pose concerns of technical and regulatory nature. The present study investigates the blending of hydrogen into distribution gas networks, focusing on the steady-state fluid dynamic response of the grids and gas quality compliance issues at increasing hydrogen admixture levels. Two blending strategies are analyzed, the first of which involves the supply of NG–H2 blends at

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13

Tio, Adonis E., David J. Hill, and Jin Ma. "Grid inadequacy assessment for high power injection diversity Part II: Finding grid expansion options." International Journal of Electrical Power & Energy Systems 118 (June 2020): 105831. http://dx.doi.org/10.1016/j.ijepes.2020.105831.

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14

Azzahra, Septianissa, Agus Yogianto, and Ibnu Hajar. "Studi Dampak Level Penetrasi Pembangkit Listrik Fotovoltaik pada Jaringan Distribusi." Energi & Kelistrikan 11, no. 1 (2019): 1–8. http://dx.doi.org/10.33322/energi.v11i1.388.

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Recently distribution network have connected with power plant unit also with photovoltaic power plant. Therefore voltage profile of distribution grid not any more distance from source there is voltage drop but connected with photovoltaic power plant would be increase grid voltage in this connected point also in the grid line. In this study, the distribution grid with connected with photovoltaic power plant is modelled. By using through MATHLAB / SIMULINK, modeling and simulation can be done ondistribution grid with two point connected to the photovoltaic power plant. From the simulation and an

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15

English, J. M., O. B. Toon, and M. J. Mills. "Microphysical simulations of sulfur burdens from stratospheric sulfur geoengineering." Atmospheric Chemistry and Physics Discussions 12, no. 1 (2012): 2517–58. http://dx.doi.org/10.5194/acpd-12-2517-2012.

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Abstract. Recent microphysical studies suggest that geoengineering by continuous stratospheric injection of SO2 gas may be limited by the growth of the aerosols. We study the efficacy of SO2, H2SO4 and aerosol injections on aerosol mass and optical depth using a three-dimensional general circulation model with sulfur chemistry and sectional aerosol microphysics (WACCM/CARMA). We find increasing injection rates of SO2 in a narrow band around the equator to have limited efficacy while broadening the injecting zone as well as injecting particles instead of SO2 gas increases the sulfate burden for

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16

Margossian, Harag, Mohammad Ali Sayed, Wissam Fawaz, and Zahi Nakad. "Partial grid false data injection attacks against state estimation." International Journal of Electrical Power & Energy Systems 110 (September 2019): 623–29. http://dx.doi.org/10.1016/j.ijepes.2019.03.039.

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17

Nawaz, Rehan, Rabbaya Akhtar, Muhammad Awais Shahid, Ijaz Mansoor Qureshi, and Muhammad Habib Mahmood. "Machine learning based false data injection in smart grid." International Journal of Electrical Power & Energy Systems 130 (September 2021): 106819. http://dx.doi.org/10.1016/j.ijepes.2021.106819.

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18

Xu, Aidong, Tengyue Zhang, Liang Chen, et al. "Research on False Data Injection Attack in Smart Grid." IOP Conference Series: Earth and Environmental Science 693, no. 1 (2021): 012010. http://dx.doi.org/10.1088/1755-1315/693/1/012010.

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19

Moisseyeva, Yekaterina, Altynshash Naimanova, Yerzhan Belyayev, and Nurtoleu Shakhan. "Third Order ENO Scheme on Non-Uniform Grid for Supersonic Flows." Applied Mechanics and Materials 789-790 (September 2015): 330–35. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.330.

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In the present paper the third order finite-difference shock-capturing essentially non-oscillatory (ENO) scheme for a non-uniform grid has been developed. The design of the ENO scheme is based on the methodology for uniform grids. To construct the essentially non-oscillatory piecewise polynomial, the Newtoninterpolant of the third order degree is adapted for the non-uniform grid. Also, the implementation of the symmetrical form of the slope limiters on non-uniform meshes is examined. The efficiency of the developed algorithm is demonstrated by the numerical experiments on the simulation of the

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20

Hemalatha, N., and Seyezhai Ramalingam. "MODIFIED CAPACITOR ASSISTED EXTENDED BOOST QUASI Z-SOURCE INVERTER FOR THE GRID-CONNECTED PV SYSTEM." IIUM Engineering Journal 20, no. 1 (2019): 140–57. http://dx.doi.org/10.31436/iiumej.v20i1.1042.

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A grid-tied, single stage, three phase, PV system provides higher efficiency than a two-stage PV system. This paper presents a three-phase, single stage, grid-connected PV system with MPPT and reactive power injection capability into the grid using modified capacitor assisted extended boost quasi Z-source inverter (MCAEB q-ZSI) as the grid-tied PV inverter. The adaptability of the inverter for irradiance changes and the boost factor control with its shoot-through duty ratio adjustment made it highly recommended for the grid system. The shoot-through control technique like maximum constant boos

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21

Unsal, Derya Betul, Taha Selim Ustun, S. M. Suhail Hussain, and Ahmet Onen. "Enhancing Cybersecurity in Smart Grids: False Data Injection and Its Mitigation." Energies 14, no. 9 (2021): 2657. http://dx.doi.org/10.3390/en14092657.

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Integration of information technologies with power systems has unlocked unprecedented opportunities in optimization and control fields. Increased data collection and monitoring enable control systems to have a better understanding of the pseudo-real-time condition of power systems. In this fashion, more accurate and effective decisions can be made. This is the key towards mitigating negative impacts of novel technologies such as renewables and electric vehicles and increasing their share in the overall generation portfolio. However, such extensive information exchange has created cybersecurity

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22

Du, Jun, Yan Zhang, and Zeliang Cai. "Simulation and Experimental Study of SCR Injection System." Polish Maritime Research 25, s2 (2018): 49–55. http://dx.doi.org/10.2478/pomr-2018-0073.

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Abstract According to actual engineering test, we design a linear controlled spray ammonia grille, and apply it to the SCR injection system of ship tail gas treatment. In this paper, the geometric model of ammonia injection grid was built in the flue of diesel engine, and the effects of spray atomization, ammonia uniformity and urea droplet distribution on spray atomization were simulated. Then the test bench was set up to observe the injection status of the ammonia injection grille. The NOx content of the outlet was measured by the original data of the flue gas, and the experimental data were

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23

Ikni, Djamel, Ahmed Ousmane Bagre, Mamadou Bailo Camara, and Brayima Dakyo. "An offshore wind farm energy injection mastering using aerodynamic and kinetic control strategies." E3S Web of Conferences 61 (2018): 00002. http://dx.doi.org/10.1051/e3sconf/20186100002.

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The injection of wind farm production into a grid, needs optimal strategies for energy transfer management. Usually, the power produced by the wind farms does not fulfil all the grid code requirements. The main problem is generally based on the way to reduce the impacts of power production fluctuations on the grid voltage and its frequency. To solve this problem, some authors suggest the use of an interface such as energy storage devices in order to compensate the wind power fluctuations. In fact, the storage devices installed between the wind farm and the grid can improve the power quality in

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24

Pandey, Madhusudhan, Dietmar Winkler, Roshan Sharma, and Bernt Lie. "Using MPC to Balance Intermittent Wind and Solar Power with Hydro Power in Microgrids." Energies 14, no. 4 (2021): 874. http://dx.doi.org/10.3390/en14040874.

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In a microgrid connected with both intermittent and dispatchable sources, intermittency caused by sources such as solar and wind power plants can be balanced by dispatching hydro power into the grid. Both intermittent generation and consumption are stochastic in nature, not known perfectly, and require future prediction. The stochastic generation and consumption will cause the grid frequency to drift away from a required range. To improve performance, operation should be optimized over some horizon, with the added problem that intermittent power varies randomly into the future. Optimal managem

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25

Rodarte Gutiérrez, Francisco Emilio, Oscar Carranza Castillo, Jaime José Rodríguez Rivas, Rubén Ortega González, Edgar Peralta Sánchez, and Luis Gerardo González Morales. "Harmonics Reduction and Reactive Power Injection in Wind Generation Systems." Electronics 10, no. 16 (2021): 1964. http://dx.doi.org/10.3390/electronics10161964.

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In this work, methods are implemented to improve two aspects of energy quality in a wind generation system. First, the harmonic reduction is achieved by applying a linear control technique in the Grid Side Converter; and second, the power factor of the wind generation system using a Doubly Fed Induction Generator (DFIG) is adjusted by injecting reactive power. The reduction of the harmonic content is performed with a digital resonant controller, which tracks the periodic signals corresponding to the current harmonics of the Grid Side Converter (GSC), which is part of a “back to back” converter

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Zhang, Anan, Shi Chen, Fan Zhang, Xuliang Zhang, Hongwei Li, and Xue Gong. "Coordinated reactive power optimization for multi-TSO grids in an autonomous way." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 35, no. 5 (2016): 1724–40. http://dx.doi.org/10.1108/compel-11-2015-0427.

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Purpose It is very indispensable for the various control centers of multi-transmission system owners (TSOs) grids to coordinate their reactive power optimization (RPO) efforts. However, such coordinated equilibrium point is comparatively hard to achieve unless one TSO control center could obtain all grids’ information in detail, which may lead to confidential issue and heavy communicating load. The purpose of this paper is to propose a solution to optimizing the reactive power control efforts among multi-TSOs grids with a mathematic interconnection model and reasonable communication cost. Desi

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Dharavath, Malsur, P. Manna, and Debasis Chakraborty. "Computational Study of Transverse Slot Injection in Supersonic Flow." Defence Science Journal 68, no. 2 (2018): 121. http://dx.doi.org/10.14429/dsj.68.11069.

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The knowledge of transverse sonic injection flow field is very important for the design of scramjet combustor. Three dimensional Reynolds-Averaged Navier Stokes equations alongwith turbulence models are solved to find the effect of transverse sonic slot injection into a supersonic flow. Grid sensitivity of the results is studied for various structured grids. Simulations with different turbulence models (i.e., k-ε, k-ω, SST-kω, and RNG-kε) reveals that RNG-kε turbulence model better predicts the flow features. Computational fluid dynamics predicted wall pressure distribution for various injecti

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28

Serem, Noah, Lawrence K. Letting, and Josiah Munda. "Voltage Profile and Sensitivity Analysis for a Grid Connected Solar, Wind and Small Hydro Hybrid System." Energies 14, no. 12 (2021): 3555. http://dx.doi.org/10.3390/en14123555.

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Due to increase in integration of renewable energy into the grid and power quality issues arising from it, there is need for analysis and power improvement of such networks. This paper presents voltage profile, Q-V sensitivity analysis and Q-V curves analysis for a grid that is highly penetrated by renewable energy sources; solar PV, wind power and small hydro systems. Analysis is done on IEEE 39 bus test system with Wind power injection alone, PV power injection alone, with PV and wind power injection and with PV, wind and micro hydro power injection to the grid. The analysis is used to deter

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29

Park, Chan-Sol, Seung-Ho Song, and Ji-Hoon Im. "Equivalent Grid Impedance Estimation Method Using Negative Sequence Current Injection in Three-Phase Grid-connected Inverter." Transactions of the Korean Institute of Power Electronics 20, no. 6 (2015): 526–33. http://dx.doi.org/10.6113/tkpe.2015.20.6.526.

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Liu, Zipeng, Jinjun Liu, and Zeng Liu. "Analysis, Design, and Implementation of Impulse-Injection-Based Online Grid Impedance Identification With Grid-Tied Converters." IEEE Transactions on Power Electronics 35, no. 12 (2020): 12959–76. http://dx.doi.org/10.1109/tpel.2020.2995016.

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31

Young, C. D., J. C. Han, Y. Huang, and R. B. Rivir. "Influence of Jet-Grid Turbulence on Flat Plate Turbulent Boundary Layer Flow and Heat Transfer." Journal of Heat Transfer 114, no. 1 (1992): 65–72. http://dx.doi.org/10.1115/1.2911269.

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The influence of high mainstream turbulence on turbulent boundary layer flow and heat transfer is experimentally investigated for length Reynolds numbers between 4 × 104 and 1.5 × 106. The high mainstream turbulence is produced by a round tube grid with uniform jet injection. Injected air is blown in either an upwind or downwind direction at a controllable flow rate. A flat plate test section instrumented with foil thermocouples is located downstream from the jet grid. The turbulence intensity decay and length scale growth along the test plate, the mean velocity and temperature profiles across

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32

Feng, Zhao, and Peng Jiaqi. "Islanding Detection Based on High Frequency Injection for Multi Inverter Microgrid." Open Electrical & Electronic Engineering Journal 9, no. 1 (2015): 560–65. http://dx.doi.org/10.2174/1874129001509010560.

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Islanding detection is one of the indispensable protection detections for grid-connected inverters. The detection of islanding is the key factor that should be considered in the analysis of grid-connection security. The non-detection zone is the performance index of anti-islanding plan. According to the phase feature, quantitative analyses of the non-detection zone of several frequency disturbance schemes are conducted under several different coordinate systems by increasing disturbance, namely injecting third harmonic to the modulating wave that produces inverter drive signal and detects the

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Chen, Liang, Songlin Gu, Ying Wang, Yang Yang, and Yang Li. "Stacked Autoencoder Framework of False Data Injection Attack Detection in Smart Grid." Mathematical Problems in Engineering 2021 (July 3, 2021): 1–8. http://dx.doi.org/10.1155/2021/2014345.

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The advanced communication technology provides new monitoring and control strategies for smart grids. However, the application of information technology also increases the risk of malicious attacks. False data injection (FDI) is one kind of cyber attacks, which cannot be detected by bad data detection in state estimation. In this paper, a data-driven FDI attack detection framework of the smart grid with phasor measurement units (PMUs) is proposed. To enhance the detecting accuracy and efficiency, the multiple layer autoencoder algorithm is applied to abstract the hidden features of PMU measure

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Yi Huang, M. Esmalifalak, Huy Nguyen, et al. "Bad data injection in smart grid: attack and defense mechanisms." IEEE Communications Magazine 51, no. 1 (2013): 27–33. http://dx.doi.org/10.1109/mcom.2013.6400435.

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Chen, Po-Yu, Shusen Yang, Julie A. McCann, Jie Lin, and Xinyu Yang. "Detection of false data injection attacks in smart-grid systems." IEEE Communications Magazine 53, no. 2 (2015): 206–13. http://dx.doi.org/10.1109/mcom.2015.7045410.

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Jiang, Jing, and Yi Qian. "Defense Mechanisms against Data Injection Attacks in Smart Grid Networks." IEEE Communications Magazine 55, no. 10 (2017): 76–82. http://dx.doi.org/10.1109/mcom.2017.1700180.

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Hamlich, Mohamed, Noureddine Belbounaguia, and Abdelkarim El Khantach. "Machine learning methods against false data injection in smart grid." International Journal of Reasoning-based Intelligent Systems 12, no. 1 (2020): 51. http://dx.doi.org/10.1504/ijris.2020.10026679.

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Hamlich, Mohamed, Abdelkarim El Khantach, and Noureddine Belbounaguia. "Machine learning methods against false data injection in smart grid." International Journal of Reasoning-based Intelligent Systems 12, no. 1 (2020): 51. http://dx.doi.org/10.1504/ijris.2020.104991.

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Guan, Zhitao, Nan Sun, Yue Xu, and Tingting Yang. "A comprehensive survey of false data injection in smart grid." International Journal of Wireless and Mobile Computing 8, no. 1 (2015): 27. http://dx.doi.org/10.1504/ijwmc.2015.066756.

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George, Sneha Sunny, Robins Anto, and Sreenath B. "Analysis of Output DC Current Injection in Grid Connected Inverters." International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering 03, no. 09 (2014): 11905–11. http://dx.doi.org/10.15662/ijareeie.2014.0309057.

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Roinila, Tomi, Matti Vilkko, and Jian Sun. "Online Grid Impedance Measurement Using Discrete-Interval Binary Sequence Injection." IEEE Journal of Emerging and Selected Topics in Power Electronics 2, no. 4 (2014): 985–93. http://dx.doi.org/10.1109/jestpe.2014.2357494.

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42

Pasini, G., A. Baccioli, L. Ferrari, M. Antonelli, S. Frigo, and U. Desideri. "Biomethane grid injection or biomethane liquefaction: A technical-economic analysis." Biomass and Bioenergy 127 (August 2019): 105264. http://dx.doi.org/10.1016/j.biombioe.2019.105264.

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43

Adil Sbaï, M., and N. Amraoui. "Development and application of diagnostic tools for seawater intrusion analysis in highly heterogeneous coastal aquifers." E3S Web of Conferences 54 (2018): 00030. http://dx.doi.org/10.1051/e3sconf/20185400030.

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We developed novel, computationally efficient, methods as effective screening tools to analyze seawater intrusion processes in highly heterogeneous coastal aquifer systems. They enable delineation of pumping wells capture zones and swept zones associated to injection wells for remediation of seawater encroachment. Forward or backward travel times and residence time distributions are robustly simulated and visualized on the computational grid. These steady-state indicators, precomputed at fine grids, are used to generate optimal locally refined grids for efficient transient solute transport sim

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Kotla, Rahul Wilson, and Srinivasa Rao Yarlagadda. "Grid Tied Solar Photovoltaic Power Plants with Constant Power Injection Maximum Power Point Tracking Algorithm." Journal Européen des Systèmes Automatisés 53, no. 4 (2020): 567–73. http://dx.doi.org/10.18280/jesa.530416.

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Day to day there is an increase in installations of new Solar Photovoltaic Power plants (SPVPP’s) which directly reflects the grid. As the SPVPP’s output power is fluctuating in nature, which is directly injected to the utility grid faces the challenges like overloading. Therefore, to overcome the overloading situations of grid, its infrastructure should be replaced by higher ratings which will increase the system cost. Due to this there is a need to limit the grid injected power from SPVPP’s to overcome the overloading situations. In this article a Constant power injection (CPI) algorithm is

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Ou, S., A. B. Mehendale, and J. C. Han. "Influence of High Mainstream Turbulence on Leading Edge Film Cooling Heat Transfer: Effect of Film Hole Row Location." Journal of Turbomachinery 114, no. 4 (1992): 716–23. http://dx.doi.org/10.1115/1.2928024.

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The effect of film hole row location on leading edge film cooling effectiveness and heat transfer coefficient under high mainstream turbulence conditions was experimentally determined for flow over a blunt body with semicylinder leading edge and a flat afterbody. Two separate cases of film injection film holes located only at ± 15 or ± 40 deg were studied. The holes were spaced three hole diameters apart in the spanwise direction and inclined 30 and 90 deg to the surface in the spanwise and streamwise directions, respectively. A bar grid (Tu = 5.07 percent), a passive grid (Tu = 9.67 percent),

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Rech, Cassiano, Julian Giacomini, Leandro Michels, and Humberto Pinheiro. "Impact Of Common Mode Signal Injection On The Leakage Current Of A Grid-connected Transformerless Pv Inverter." Eletrônica de Potência 21, no. 4 (2016): 296–304. http://dx.doi.org/10.18618/rep.2016.4.2633.

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Buraimoh, Elutunji, Innocent E. Davidson, and Fernando Martinez-Rodrigo. "Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control." Energies 12, no. 20 (2019): 3994. http://dx.doi.org/10.3390/en12203994.

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The growing level of grid-connected renewable energy sources in the form of microgrids has made it highly imperative for grid-connected microgrids to contribute to the overall system stability. Consequently, secondary services which include the fault ride-through (FRT) capability are expected to be possessed characteristics by inverter-based microgrids. This enhances the stable operation of the main grid and sustained microgrid grid interconnection during grid faults in conformity with the emerging national grid codes. This paper proposes an effective FRT secondary control strategy to coordina

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Alavian, Sayyed Ahmad, and Curtis H. Whitson. "CO2 EOR Potential in Naturally Fractured Haft Kel Field, Iran." SPE Reservoir Evaluation & Engineering 13, no. 04 (2010): 720–29. http://dx.doi.org/10.2118/139528-pa.

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Summary We present results studying the enhanced-oil-recovery (EOR) potential for carbon dioxide (CO2) injection in the naturally fractured Haft Kel field, Iran, on the basis of detailed compositional simulations of a homogeneous single matrix block surrounded by fractures. Oil recoveries from CO2 injection in this idealized model approach 90% for reservoir pressures of 1,400 psia and higher (i.e., at and above current reservoir pressure of 1,500–1,800 psia). It is expected that heterogeneity will reduce recovery on the field scale. This compares with 15–25% recoveries reported for gas-cap exp

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Song, Zhanfeng, and Yun Yu. "Dual-Loop-Based Current Controller for Transformerless Grid-Tied Converters with Improved Disturbance Attenuation against Voltage Measurement Errors." Energies 12, no. 5 (2019): 903. http://dx.doi.org/10.3390/en12050903.

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To eliminate current harmonics and to obtain enhanced dynamic behaviors, the voltage feedforward scheme is normally adopted in the control process of transformerless grid-tied converters. However, voltage measurement errors caused by parameter variation of sampling resistance and zero-voltage drift in analog devices will result in DC current injection and distorted grid currents in grid-tied systems. Conventional compensation strategies based on plug-in repetitive controllers and multiple resonant controllers are considered to be effective solutions to solve this problem. Even though undesired

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Rawat, Danda B., and Chandra Bajracharya. "Detection of False Data Injection Attacks in Smart Grid Communication Systems." IEEE Signal Processing Letters 22, no. 10 (2015): 1652–56. http://dx.doi.org/10.1109/lsp.2015.2421935.

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