在复杂条件下对光伏MPPT的研究基于先进的大墙建筑算法方法
Liming Wei1, Linghao Cao2, Hongdan Jia1
1School of Electrical and Computer Engineering, Jilin Jianzhu University, Changchun, 130118, Jilin, China.
Scientific reports
|November 14, 2024
概括
结合长城建设算法 (LGWGCA) 和扰乱和观测 (P&O) 的新方法在部分遮阳下提高光伏 (PV) 系统效率. 这种LGWGCA-P&O方法提高了跟踪速度,并最大限度地减少了功耗损失,以实现最佳的能源采集.
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) 系统在部分遮阳下表现出复杂的非线性,多峰电压特性.
- 传统的最大功率点跟踪 (MPPT) 算法在这些具有挑战性的条件下努力实现最佳性能.
- 低于最佳的MPPT会导致显著的能量损耗和整体系统效率的降低.
研究的目的:
- 开发一种新的MPPT算法,克服部分阴影下现有方法的局限性.
- 为了提高光伏系统的MPPT的跟踪速度和准确性.
- 为了最大限度地减少功耗损失,并最大限度地提高光伏系统的能量转换效率.
主要方法:
- 介绍LGWGCA-P&O方法,一种混合方法,将修改后的长城建筑算法 (LGWGCA) 与扰乱和观察 (P&O) 技术相结合.
- 根据LGWGCA的说法,它采用了一种由灰狼优化 (GWO) 启发的位置更新机制,以及利维的飞行策略,以改善代理分配和加速跟踪.
- 算法无地过渡到P&O方法在最大功率点附近的精确识别.
主要成果:
- 通过LGWGCA-P&O方法实现了超过99.96%的光伏转换效率,大大降低了功耗损失.
- 与传统的GWO-P&O方法相比,收速度提高了约40%.
- 拟议的方法在极端条件下展示了优越的性能,计算效率和对粒子群优化和子搜索优化的稳定性.
结论:
- 开发的LGWGCA-P&O方法有效地解决了MPPT在光伏系统中部分遮阳条件下的挑战.
- 这种混合方法在跟踪速度,准确性和整体能量转换效率方面提供了显著的改进.
- 该LGWGCA-P&O方法为优化光伏系统性能提供了强大的和计算效率高的解决方案.
相关概念视频
01:11P-N junction
469
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...
469
01:24Fast Decoupled and DC Powerflow
175
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:
175
01:16Maximum Power Transfer
231
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...
By substituting the entire circuit with...
231
01:26The Power Flow Problem and Solution
172
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...
172
01:20Power Factor Correction
157
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.
157
01:23Maximum Power Flow and Line Loadability
95
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.
95