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电网技术  2015 

基于阻抗适配的独立光伏系统协调控制方法

DOI: 10.13335/j.1000-3673.pst.2015.04.006, PP. 911-915

Keywords: 阻抗适配,光伏发电,协调控制,最大功率点跟踪,负载功率跟踪

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Abstract:

以独立光伏发电协调控制系统为研究对象,为了减少系统工作模式转换带来的控制结构切换问题,在动态等效阻抗匹配法的基础上改进提出了阻抗适配法,实现了一种无需系统结构改变的双模式转换协调控制技术。特点是通过对光伏电池等效内、外阻抗的适配,能使光伏电池根据需要连续调节输出功率,完成最大功率跟踪与负载跟踪模式的平滑转换。系统中的双向变换器工作在稳压模式;协调控制系统不需切换判断逻辑,实现相对简单。最后通过实验验证了所提策略的有效性。

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