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
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
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.
- 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.
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