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Maximum Power Flow and Line Loadability01:23

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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.
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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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A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
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基于算术优化的MPPT用于在非均情况下运行的光伏系统.

Maheshwari Adaikkappan1, Nageswari Sathiyamoorthy2, Durga Devi Ravichandran3

  • 1Department of Electronics and Communication Engineering, M. Kumarasamy College of Engineering, Karur, Tamilnadu, India.

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概括

本研究介绍了一种算术优化算法 (AOA),用于在面临非均条件的光伏系统中进行最大功率点跟踪 (MPPT). 在AOA-MPPT有效提高功率输出和效率,即使在不同的太阳辐射.

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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
  • 优化算法 优化算法

背景情况:

  • 光伏 (PV) 模块通常在不均的太阳辐射下运行,导致输出功率降低和无效的最大功率点跟踪 (MPPT).
  • 太阳能模块中绕道二极管的存在在不同辐射强度下产生多峰功率-电压 (P-V) 曲线,使标准MPPT复杂化.
  • 当前的MPPT方法在光伏系统遇到部分遮阳或阳光分布不均时,难以保持最佳性能.

研究的目的:

  • 提出和验证一个算术优化算法 (AOA),用于在非均照射条件下在光伏系统中强大的MPPT.
  • 通过克服多峰P-V曲线带来的挑战,提高光伏系统的跟踪效率和动态响应.
  • 将AOA-MPPT与单端初级感应转换器 (SEPIC) 集成,以实现高效的电压调节和操作点跟踪.

主要方法:

  • 使用算术优化算法 (AOA) 在光伏系统中执行最大功率点跟踪 (MPPT).
  • 使用单端初级感应转换器 (SEPIC) 具有电压升级/降低功能,以排除非操作电压区域.
  • AOA-MPPT算法将光伏模块的电流和电压作为输入来计算转换器的工作周期并保持最大功率点 (MPP).

主要成果:

  • 拟议的AOA-MPPT在各种非均阳光照射模式下的模拟中表现出快速响应和出色的稳定状态性能.
  • 在所有测试的非均条件下,AOA-MPPT的跟踪效率始终保持在99%以上.
  • 观察到AOA-MPPT的结算时间在200至300毫秒之间,表明快速收.

结论:

  • 数学优化算法 (AOA) 为在非均条件下运行的光伏系统中MPPT提供了有效的解决方案.
  • 将AOA-MPPT与SEPIC转换器集成,可以确保可靠地跟踪最大功率点,尽管存在部分遮阳等挑战.
  • 拟议的方法显著提高了跟踪效率和响应速度,使光伏系统更加稳健和高效.