首页|基于MPPT变换器开关频率调节的光伏系统效率优化研究

基于MPPT变换器开关频率调节的光伏系统效率优化研究

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针对光伏发电系统的效率提升,提出一种基于MPPT变换器开关频率调节的优化策略.首先,使用三电平Boost拓扑作为MPPT变换器,并详细研究了其工作模态.然后,通过电路建模得到三电平Boost变换器的损耗模型,基于损耗模型研究最大功率点变化对光伏系统整体效率的影响,并通过调节MPPT变换器的开关频率来提升系统效率.研究结果表明,这种控制策略能够有效提升光伏系统的整体效率,易于实现且成本较低.
PV System Efficiency Optimization by Adjusting MPPT Switching Frequency
In order to improve the efficiency of PV generation system,a strategy of adjusting MPPT switching frequency is proposed.First the three-level Boost topology is employed as the MPPT and its operation modes are studied in detail. Then the loss model of three-level Boost converter is derived through circuit modeling.The influence of maximum power point variation on PV system overall efficiency is analyzed based on loss model,and system efficiency is improved by ad-justing the MPPT switching frequency.The research results demonstrate that the proposed control strategy facilitates ef-fective improvement of PV system overall efficiency and is easy to implement with relatively low cost.

MPPTthree-level Boostefficiency optimizationphotovoltaic

严永辉、李新家、杨慧敏

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江苏方天电力技术有限公司,江苏 南京 211100

东南大学,江苏 南京 211189

MPPT 三电平Boost 效率优化 光伏

2024

电工技术
重庆西南信息有限公司(原科技部西南信息中心)

电工技术

影响因子:0.177
ISSN:1002-1388
年,卷(期):2024.(20)