贺婷,龚仁喜,李畸勇.短路电流法与变步长扰动观察法结合的MPPT算法研究[J].电测与仪表,2012,49(7):6-10. HE Ting , GONG Ren-xi , LI Ji-yong.Research on Maximum-power-point Tracking Method Based on the Short-Current Combined with Variable Step P&O[J].Electrical Measurement & Instrumentation,2012,49(7):6-10.
短路电流法与变步长扰动观察法结合的MPPT算法研究
Research on Maximum-power-point Tracking Method Based on the Short-Current Combined with Variable Step P&O
According to the characteristics of small home PV system,an effective improved MPPT method is presented.When the external environment rapidly changes,in order to regulate the PV array operating point near the maximum-power point quickly,the improved short-current method to track MPP is utilized at first,and then the two-level variable step P&O is adopted to adjust the PV array operating point to be at the maximum-power point.The simulation of the improved method and common methods show that,contrast to the latter,the former can trace the maximum-power point more quickly,efficiently and accurately,and also can reduce the energy loss caused by the oscillation of the operating point about the maximum-power point,thus enhancing the PV system efficiency.
