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首页> 外文期刊>Journal of Power and Energy Engineering >Design Analysis of DC-DC Converters Connected to a Photovoltaic Generator and Controlled by MPPT for Optimal Energy Transfer throughout a Clear Day
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Design Analysis of DC-DC Converters Connected to a Photovoltaic Generator and Controlled by MPPT for Optimal Energy Transfer throughout a Clear Day

机译:连接到光伏发电机并受MPPT控制的DC-DC转换器的设计分析,可在整个晴天实现最佳的能量传输

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摘要

The DC-DC converters are widely used in photovoltaic generating systems as an interface between PV module and the load. These converters must be chosen to be able to match the maximum power point (MPP) of PV module when climatic conditions change with different resistive load values. So DC-DC converters must be used with MPPT controller in order to reduce losses in the global PV system. This article focuses on the effect of climatic conditions on design of two components (inductance, capacitance) for three topologies of DC-DC converters commonly used in PV systems. When climatic conditions change, the boundary of inductance and capacitance parameters of DC-DC converter will change. These two parameters must be properly sized to achieve optimal efficiency for each converter. The design optimization is based on two principles: 1) for a steady-state operation in a continuous conduction mode, the inductance value for all choppers must be greater than the maximum value of boundary inductance, and 2) in order to limit the output voltage ripple of DC-DC converter below a desired value, the filter capacitance must be larger than the maximum value of boundary capacitance.
机译:DC-DC转换器广泛用作光伏发电系统中的PV模块和负载之间的接口。当气候条件随着电阻负载值的变化而变化时,必须选择这些转换器以使其能够匹配PV模块的最大功率点(MPP)。因此,必须将DC-DC转换器与MPPT控制器一起使用,以减少全局PV系统中的损耗。本文重点讨论气候条件对光伏系统中常用的DC-DC转换器的三种拓扑的两个组件(电感,电容)的设计的影响。当气候条件改变时,DC-DC转换器的电感和电容参数的边界将改变。这两个参数的大小必须适当调整,以实现每个转换器的最佳效率。设计优化基于两个原则:1)对于连续导通模式下的稳态操作,所有斩波器的电感值必须大于边界电感的最大值,以及2)为了限制输出电压如果DC-DC转换器的纹波低于所需值,则滤波器电容必须大于边界电容的最大值。

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