基于LLC谐振变换器的电导增量法MPPT直接控制策略  

Direct Control Strategy of Incremental Conductance MPPT Based on LLC Resonant Converter

作　　者：石俊[1] 陈丁[1] 

机构地区：[1]九江学院电子工程学院,江西九江332005

出　　处：《电气传动》2015年第4期33-36,共4页Electric Drive

基　　金：江西省科技厅青年基金科技项目(20132BAB211038)

摘　　要：提出了一种基于LLC谐振变换器的电导增量法最大功率点跟踪(MPPT)直接控制策略的实现方案。通过采用LLC谐振变换器实现电气隔离,同时获得较高的功率变换效率;另一方面,通过采用直接控制策略省略了传统的双环控制中PI调节器。该直接控制策略的基本思想是:在每个采样周期中直接计算得到LLC谐振变换器的所需开关频率并在下一个采样周期中实时更新以实现MPPT。最后通过1台650 W的样机试验验证了所提出方案的有效性。A direct control strategy of incremental conductance maximum power point tracking based on LLC resonant converter was proposed. Electrical isolation is achieved by using LLC resonant converter, meanwhile power conversion efficiency is ensured. On the other hand, by using the direct control strategy, the traditional PI regulator is omitted. The basic idea of the direct control strategy is that the desired switching frequency of LLC resonant converter is calculated at each sampling period and updated in the next period in order to achieve MPPT. Finally, the effectiveness of the proposed strategy is verified through a 650 W prototype test.

关 键 词：MPPT 电导增量法 LLC谐振变换器 直接控制 

分 类 号：TM46[电气工程—电器]