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関連する概念動画

Generation of Three-Phase Voltage01:21

Generation of Three-Phase Voltage

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...
Wind Turbine Machine Models01:24

Wind Turbine Machine Models

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...
Turbine-Governor Control01:17

Turbine-Governor Control

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...
Generator Voltage Control01:21

Generator Voltage Control

Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand, use...
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
Electric Generator: Alternator01:25

Electric Generator: Alternator

Electric generators induce an emf by rotating a coil in a magnetic field. A simple alternator is an AC generator that creates electrical energy that varies sinusoidally with time. A simple alternator consists of a conducting loop that is placed inside a uniform magnetic field. The loop is connected to split rings connected to the external circuit with the help of brushes.
The magnetic flux passing through the coil varies sinusoidally as the loop rotates inside the magnetic field. This...

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関連する実験動画

中国における風力発電による電力の可能性

Michael B McElroy1, Xi Lu, Chris P Nielsen

  • 1School of Engineering and Applied Science and Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, USA. mbm@seas.harvard.edu

Science (New York, N.Y.)
|September 12, 2009
PubMed
まとめ
この要約は機械生成です。

中国における風力エネルギーは,石炭の重要な代替品であり,二酸化炭素排出量を大幅に削減します. 有利な価格設定があれば,風力発電は2030年に予測されるすべての電力需要を満たし,石炭発電による電力の重要な部分を置き換えることができます.

関連する実験動画

科学分野:

  • 再生可能エネルギーの再生可能エネルギー
  • 環境科学 環境科学
  • エネルギー政策 エネルギー政策

背景:

  • 石炭は中国の主要なエネルギー源であり,二酸化炭素の排出に大きく貢献しています.
  • 電力需要の増加に対応するために,持続可能なエネルギーの代替手段の必要性が高まっています.
  • 入札手続きを含む政府の政策は,新しいエネルギー源の採用に影響を与えます.

研究 の 目的:

  • 中国における風力発電による発電の可能性を評価する.
  • 将来の電力需要を満たし,石炭への依存を減らすための風力発電の能力を評価する.
  • 政府が承認した現在の入札手続きの下で,風力エネルギーの経済的実現可能性を分析する.

主な方法:

  • 同化された気象データから派生した利用された風力場.
  • 中国の既存の政府承認の入札手続きの枠組みの中で,風力発電の可能性を評価した.
  • 保証された電力価格 (0.516 RMB/kWh) とコンセンション価格 (0.4 RMB/kWh) をベースにしたシナリオを分析した.

主要な成果:

  • 風力発電は,2030年までに中国が予測する全電力需要を満たす可能性がある.
  • 0.4 RMB/kWhという低価格で,風力発電は石炭発電の23%を代替することができる.
  • この研究は,風力エネルギーの採用の増加によって,二酸化炭素排出量の大幅な削減が達成可能であることを確認しています.

結論:

  • 風力発電は,中国における発電における石炭の有効かつ重要な代替手段である.
  • 利便な価格構造は,風力エネルギーの国有電網への統合を加速させることができます.
  • 風力発電の普及が拡大すれば,中国の炭素排出削減目標に大きく貢献できる.