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相关概念视频

Maximum Power Transfer01:16

Maximum Power Transfer

195
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
195
Maximum Power Flow and Line Loadability01:23

Maximum Power Flow and Line Loadability

91
The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.
91
Power Factor Correction01:20

Power Factor Correction

148
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.
148
P-N junction01:11

P-N junction

432
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
432
Power Factor01:11

Power Factor

356
The power factor is defined as the ratio of average (or active) power to apparent power, as illustrated by the relation
356
The Maximum Power Transfer Theorem01:20

The Maximum Power Transfer Theorem

515
Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.
515

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全球MPPT的性能验证,用于通过光伏系统在复杂的部分遮阳效应下高效地提取电力.

Muhammad Abu Bakar Siddique1, Dongya Zhao2, Khmaies Ouahada3

  • 1College of New Energy, China University of Petroleum (East China), Qingdao, 266580, China.

Scientific reports
|May 16, 2025
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概括

本研究引入了一种适应的基于扰动和观测的模型预测控制 (APO-MPC) 用于光伏最大功率点跟踪. APO-MPC算法在复杂的部分遮阳条件下有效地跟踪全球最大功率点 (GMPP).

关键词:
能源转换 能源转换最大功率点跟踪 (MPPT) 是指最大功率点的跟踪.最佳的控制控制是最好的控制.可再生能源是可再生的能源.

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科学领域:

  • 可再生能源系统可再生能源系统
  • 电气工程 电气工程
  • 控制系统 控制系统

背景情况:

  • 光伏 (PV) 能源对于可持续发展至关重要.
  • 传统的最大功率点跟踪 (MPPT) 算法与部分遮阳作斗争,导致功率损失.
  • 现有的方法通常被困在局部最大功率点 (LMPPs) 中,在非均的辐射下.

研究的目的:

  • 开发和评估一个先进的MPPT算法,用于增强光伏能源提取.
  • 在部分阴影条件下解决传统MPPT算法的局限性.
  • 确保在复杂情景下稳定有效地跟踪全球最大功率点 (GMPP).

主要方法:

  • 开发一个适应的扰动和观察基于模型预测控制 (APO-MPC) 算法.
  • 在 MATLAB/Simulink 中进行模拟,包括六个串联的光伏模块和一个增压转换器.
  • 在统一,简单部分和复杂部分阴影条件下 (UIC,SPSC,CPSC) 与其他MPPT算法进行比较分析.
  • 使用实时硬件实现和季节性现场数据进行验证.

主要成果:

  • 与其他MPPT方法相比,APO-MPC算法显示出更高的性能.
  • 在GMPP跟踪期间没有实现任何振荡.
  • 平均收时间为0.17秒.
  • 在复杂的部分遮阳条件下达到99.46%的高追踪效率.

结论:

  • APO-MPC方法提供了快速,准确和稳定的GMPP跟踪.
  • 它有效地避免陷入LMPP,即使在复杂的部分遮阳条件下.
  • 这种先进的MPPT策略显著提高了光伏能源产量和系统可靠性.