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Related Concept Videos

Wind Turbine Machine Models01:24

Wind Turbine Machine Models

300
In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
300
Generation of Three-Phase Voltage01:21

Generation of Three-Phase Voltage

564
A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
564
Design Example: Calculating Safe Diameter for Wind-Exposed Disc01:17

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

242
Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
242
The Power Flow Problem and Solution01:26

The Power Flow Problem and Solution

445
Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk​, phase angle δk​, real power Pk​, and reactive power Qk​. Two of these four variables are inputs, while the power flow program computes...
445
Turbine-Governor Control01:17

Turbine-Governor Control

543
Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
543
Power Factor Correction01:20

Power Factor Correction

339
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
339

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Related Experiment Video

Updated: Nov 15, 2025

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
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Optimal path for overcoming barriers in developing China's wind energy industry.

Huifang Sun1, Yaoguo Dang2, Wenxin Mao3

  • 1College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Jiangjunlu Campus, Nanjing, 211106, China. sunhuifang2014@163.com.

Environmental Science and Pollution Research International
|March 6, 2021
PubMed
Summary

China

Keywords:
Barrier interactionsDEMATEL-NKPath analysisRenewable and clean energyWind energy industry

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Area of Science:

  • Energy Policy
  • Sustainable Development
  • Renewable Energy Systems

Background:

  • China's long-term strategy to develop the wind energy industry (WEI) addresses energy crises and greenhouse gas emissions.
  • Despite favorable prospects, China's WEI encounters significant barriers hindering its growth.
  • Systematic development requires understanding and prioritizing these barriers.

Purpose of the Study:

  • To propose a path analysis approach for identifying optimal methods and timing to overcome barriers in WEI development.
  • To reveal the priority phases for addressing diverse barriers in the Chinese wind energy sector.
  • To provide a strategic framework for sustainable wind energy system development.

Main Methods:

  • Identification of a multidimensional barrier set (institutional, economic, social, technical, market) through literature review and interviews.
  • Construction of a path analysis model using the grey group DEMATEL-NK model to extract barrier causality and intensity.
  • Development of a path simulation algorithm with heuristics for optimizing barrier resolution.

Main Results:

  • Prioritizing the completion of the legal and regulatory framework is crucial for securing financial incentives and stakeholder coordination.
  • Developing an efficient talent cultivation system and strengthening industry-academia cooperation are key for short-term technical and R&D enhancement.
  • The study generates an optimal path for systematically overcoming barriers in WEI development.

Conclusions:

  • The proposed path analysis approach offers novel insights for prioritizing barrier mitigation in WEI development.
  • Managers can utilize this strategic instrument to foster sustainable and clean wind energy systems.
  • Addressing institutional and human capital barriers is essential for unlocking China's wind energy potential.