Renewable energy course#02
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This document discusses vertical axis wind turbine (VAWT) performance prediction theories and a single stream tube model for VAWTs. It presents the angle of attack equation for the single stream tube model assuming zero tilt angle. It also provides the iterative equation used to determine the induction factor and the power equation that is integrated over a full rotation to predict average power. The document indicates that understanding and integrating various engineering disciplines is required to make meaningful contributions to wind turbine research and development.
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The document outlines new features in the PVsyst software. Version 6.39 includes improvements to meteorological input data, system definitions to support optimizers and multi-MPPT inverters, 3D editing tools, and batch simulations. Version 6.40 will introduce a text-based file format, faster 3D rendering, and expanded battery system modeling. Future versions will provide more detailed battery and hybrid system simulations.
Examples on load curve
Here are the steps to solve this homework problem:
1) To draw the load curves and load duration curves, list the loads from each region in descending order. Plot these on two sets of axes to show regions A and B separately, and on a third set of axes to show the total loads.
2) To find the average load and load factor of the total system:
- Calculate the total load at each time interval by adding regions A and B
- Calculate the total area under the load curve by summing the load × time intervals
- Divide total area by total hours to get average load
- Calculate load factor as average load/max load
3) The reserve capacity is the plant capacity (10 MW
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2) To find the average load and load factor of the total system:
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3) Renderings showing the false color lighting distribution.
4) Valuation field details for the roadway including isolines, average lux, minimum lux, maximum lux, and uniformity ratios.
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Among the Renewable Energy Sources, Wind Energy is taken up with careful prior efforts before implementation as it requires all capital and technical inputs before payback starts. However, it is a clean source of electric power compared to coal based thermal power. India is a country that has made progress in wind power investment.
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This presentations includes the basic fundamentals of time series data forecasting. It starts with basic naive, regression models and then explains advanced ARIMA models.
Science (1)
This document summarizes a research paper about modeling and controlling a cascaded doubly-fed induction generator (CDFIG) system for power generation. The key points are:
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2) The behavior and efficiency of the CDFIG system depends on parameters like the number of pole pairs of each DFIM and the electrical coupling sequence between rotor windings.
3) A dynamical modeling approach using equivalent circuits is developed to design an controller for the CDFIG system. Simulation and experimental results are used to validate the controller.
5378086.ppt
This document discusses techniques for reducing power consumption in integrated circuits and systems. It begins by providing background on technology trends that increase power needs such as rising transistor counts. It then discusses sources of power dissipation in CMOS circuits and how power is affected by voltage, frequency, capacitance, and switching activity. The document outlines a design flow for analyzing power at different levels of abstraction. It presents techniques for reducing dynamic, short-circuit, and leakage power through voltage scaling, transistor sizing, clock gating, and other methods. Architecture-level, circuit-level, and logic-level power optimization techniques are also summarized.
Karnataka PGCET Electrical Science - Part B 2018 syllabus
This document contains the syllabus and model question paper for the electrical sciences subject area of Biomedical Engineering & Medical Electronics.
The syllabus covers topics like human anatomy and physiology, biomedical instrumentation, medical imaging systems, signals and systems/DSP, biomedical signal processing, and medical image processing.
The model questions are divided into two sections - Section I contains one mark questions, Section II contains two mark questions. The questions test knowledge of topics like biomedical transducers, medical devices, imaging modalities, filtering, segmentation, etc.
However, the model question papers for Sections I and II are not fully provided in the document. They need to be appended by the Instrumentation Board of Studies.
Ph.D. Defence on "High power medium voltage dc/dc converter technology for D...
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Power extraction from wind energy..pptx
The document presents the theoretical and computational investigation of an optimized horizontal-axis wind turbine blade for power extraction at wind farms in Bangladesh. The researchers designed and modeled a blade using the SD7080 airfoil profile. Computational fluid dynamics simulations validated the blade element momentum theory used in the design. The optimized blade was found to have higher annual power output and lower unit cost of energy than a commercial Enercon turbine, while requiring more land area for a wind farm.
Power extraction from wind energy..pptx
Primary goal was to theoretically construct a wind farm at Hatiya island (Bangladesh) by designing an area
optimal blade and estimating the potential power extraction along with Energy Cost per Unit. Additionally, we determined the necessary land and contrasted it with the commercial turbine's Energy Cost per Unit
Nonlinear control of grid-connected wind energy conversion system without mec...
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This document summarizes a research article that addresses controlling a wind energy conversion system (WECS) consisting of a wind turbine connected to the grid via a doubly fed induction generator (DFIG) and an AC/DC/AC converter. The control objectives are to: 1) control the generator speed to track an optimal reference, 2) control the stator reactive power to be null, 3) regulate the DC-link voltage to a constant value, and 4) ensure a unitary power factor. A high gain observer is designed to estimate unmeasurable mechanical variables. A sliding mode controller is developed using the observer to achieve the control objectives. Simulation results using MATLAB/SIMULINK evaluate the performance of the proposed controller under a1233
This document discusses the analysis of overcurrent fault conditions in high temperature superconducting (HTS) generator field coil systems. It presents a finite element model for analyzing coil temperatures during faults. The model includes the coil assembly, cryogenic cooling system, and heat transfer. Fault scenarios are analyzed to ensure the coil remains superconducting after faults. Optimizing coil design by controlling temperature variations can reduce AC power losses across different magnetic field regions in the coil.
Prakash narendra
This document presents a comparative study of using a thyristor controlled series capacitor (TCSC) and an induction machine damping unit (IMDU) to dampen subsynchronous resonance (SSR) oscillations in a series compensated power transmission system. The study develops linearized mathematical models of the system components including the generator, transmission line, TCSC, and IMDU. Eigenvalue analysis is performed on the models with and without the TCSC and IMDU to evaluate their effectiveness in damping torsional vibration modes. Time domain simulations under large disturbances also show that the IMDU provides better damping than the TCSC, though the TCSC is also effective and has the added capability of controlling active power flow.
IRJET- Design and Fabrication of a Single-Phase 1KVA Transformer with Aut...
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2) A temperature sensor circuit with a thermistor is used to sense the temperature. When the temperature increases above a preset level, a DC fan is automatically switched on to cool the transformer. It is switched off once the temperature decreases.
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Must-hybrid-power-generation-station {wind turbine (hawt)&solar (pv)}
hybrid-power-generation-station {wind turbine (hawt)&solar (pv)}
To communicate
https://www.facebook.com/profile.php?id=100007667891034
01148362618
poster
This document summarizes the feasibility of small and medium scale wind power projects in Leeds, UK. It analyzes five potential wind turbine sites based on their wind speeds and calculates the annual energy generation and capacity factors for different turbine types. It then estimates the investment potential and payback periods for turbines with varying export fractions. Finally, it examines how the generated electricity could support community energy needs or electric vehicle charging requirements.
Analysis of Low Frequency Oscillations in Autonomous Microgrid in Staic and D...
This presentation gives a overview of my B.E. final project we were working on in 2016.The hardware implementation and MATLAB simulation were main objectives.Hope you find it useful in your research.Use the reference given at the end of the slides.
for any more info please contact me- 7745058138-godwin1994lobo@gmail.com
10.1.1.192.9435(1)
This document discusses the design of an earthing system for a 230 kV substation. It presents standard equations used to calculate parameters necessary for a safe earthing system design, such as touch and step voltage criteria, earth resistance, conductor size, and electrode size. It describes using MATLAB to simulate an earthing system design for a substation in Myanmar that meets safety requirements for touch and step voltages. The design includes calculating the grid conductor length, number of electrodes, and confirming the mesh and step voltages are below the defined safety limits.
Performance analysis and enhancement of direct power control of DFIG based wi...
Performance analysis and enhancement of direct power control of DFIG based wi...International Journal of Power Electronics and Drive Systems
The paper proposes a complete modeling and control technique of variable speed wind turbine system (WTS) based on the doubly fed induction generator (DFIG). Two levels back-to-back converter is used to ensure the energy transfer between the DFIG rotor and the grid. The wind turbine to operate efficiently, a maximum power point tracking (MPPT) algorithm is implemented. Then, direct power control (DPC) strategy has been combined with the MPPT technique in order to guarantee the selection of the appropriate rotor voltage vectors and to minimize the active and reactive power errors. Finally, the simulation is performed by using MATLAB/simulink platform basing on 7.5KW DFIG wind generation system, and the results prove the effectiveness of our proposed control technique.Similar to Renewable energy course#02 (20)
Feasibility analysis of offshore wind power plants with DC collection grid
Feasibility analysis of offshore wind power plants with DC collection grid
Karnataka PGCET Electrical Science - Part B 2018 syllabus
Karnataka PGCET Electrical Science - Part B 2018 syllabus
Ph.D. Defence on "High power medium voltage dc/dc converter technology for D...
Ph.D. Defence on "High power medium voltage dc/dc converter technology for D...
A stand-alone, solar powered commercial bank with EV for public transport
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Nonlinear control of grid-connected wind energy conversion system without mec...
Nonlinear control of grid-connected wind energy conversion system without mec...
IRJET- Design and Fabrication of a Single-Phase 1KVA Transformer with Aut...
IRJET- Design and Fabrication of a Single-Phase 1KVA Transformer with Aut...
Must-hybrid-power-generation-station {wind turbine (hawt)&solar (pv)}
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Analysis of Low Frequency Oscillations in Autonomous Microgrid in Staic and D...
Analysis of Low Frequency Oscillations in Autonomous Microgrid in Staic and D...
Performance analysis and enhancement of direct power control of DFIG based wi...
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Renewable energy course#06
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Renewable energy course#05
Flat plate solar collectors consist of an absorber plate, transparent cover sheets, and an insulated box. The absorber plate absorbs solar radiation and conducts the heat to a heat transfer fluid. Common materials for the absorber plate include metals with coatings to maximize absorption while minimizing emittance. Cover sheets such as glass allow sunlight to pass through while reducing convective heat losses. Flat plate collectors are widely used for low temperature applications like domestic hot water and space heating.
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The document discusses various concepts related to solar power including:
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2. It explains equinoxes and how the Earth's axis is not tilted toward or away from the sun on these dates.
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This document provides information about power patterns in Colorado during winter, wind turbine performance prediction theories, and the fields required to contribute to wind energy technology. It summarizes:
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The document discusses renewable energy sources and wind energy technology. It provides an overview of Pakistan's current energy scenario and targets for renewable energy. It also summarizes key concepts in wind turbine engineering design, including theories of wind turbine aerodynamics, optimal rotor design equations, blade shape optimization, and calculations for gear ratios and power output based on wind speed. Sample data on wind speeds and accumulated power at different sites are shown.
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This document discusses the design and performance analysis of a 2 kW parabolic trough solar thermal power plant. It includes diagrams of the system layout showing the parabolic trough collectors, booster mirrors, water container, and tracking mechanism. The performance analysis provides equations to calculate the solar irradiance and actual solar intensity over time based on location and date. It analyzes the experimental and theoretical energy generation and finds an efficiency of 40.7%. Tables show monthly average solar radiation levels in major Pakistani cities, and Pakistan has significant solar potential at 28-30 degrees North latitude, estimated at 85 trillion kWh per year.
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