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相关概念视频

Generator Voltage Control01:21

Generator Voltage Control

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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,...
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Half wave rectifier01:20

Half wave rectifier

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A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
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Full wave rectifier01:22

Full wave rectifier

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A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
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Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

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The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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Voltage Doubler Circuit01:23

Voltage Doubler Circuit

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A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
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Load-frequency control01:28

Load-frequency control

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Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
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Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
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连续输入电流buck DC/DC转换器用于小型风能系统,采用无传感器MPPT电流控制.

Nahla E Zakzouk1

  • 1Electrical and Control Engineering Department, Arab Academy for Science, Technology and Maritime Transport, Abukir, Alexandria, 1029, Egypt. nahlaezzeldin@aast.edu.

Scientific reports
|January 3, 2024
PubMed
概括

本研究介绍了用于小型风能系统 (WESs) 的改进的buck转换器,以减少功率波动并消除大型电容器. 这提高了效率,可靠性,并保护了轮机组件.

科学领域:

  • 电气工程 电气工程
  • 可再生能源系统可再生能源系统
  • 电力电子 电力电子 电力电子

背景情况:

  • 偏远地区的分散电气化依赖于小型风能系统 (WES).
  • 在WES中用于最大功率点跟踪 (MPPT) 的传统buck转换器遭受输入电流不连续性,导致功率波动并需要大型缓冲电容器.
  • 这些波纹会对系统运行,轮机性能和安全产生负面影响.

研究的目的:

  • 开发和评估用于WESs的新型buck转换器拓 (C1,D4,D6).
  • 选择输入电流波动最小化的转换器拓,从而消除了对大型缓冲电容的需求.
  • 提出无传感器MPPT算法,以提高WES的性能和成本效益.

主要方法:

  • 执行了三个开发的buck转换器 (C1,D4,D6) 的动态建模.
  • 基于输入电流波纹大小进行了转换器拓的比较.
  • 开发了一种无传感器MPPT算法,利用基于转换器的平均状态空间模型的可变步骤扰乱和观察 (P&O) 方法.

主要成果:

  • 开发的C1,D4和D6转换器表现出连续输入电流,与传统转换器相比,组件尺寸更小.
  • 选择的转换器拓学显著降低了输入电流的波纹,消除了对大型电解缓冲电容的需求.

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  • 拟议的无传感器MPPT算法在不同的风条件下实现了高效的功率跟踪,降低了成本和提高了准确性.
  • 结论:

    • 集成优化的buck转换器和无传感器MPPT算法提高了小型WES的效率,可靠性和成本效益.
    • 消除缓冲电容导致系统寿命改善和维护减少.
    • 拟议的系统有效地减轻了功率,扭矩和振动波动,确保了轮保护和独立应用中的稳定运行.