中文摘要：

光伏电池是太阳能光伏发电系统的基本组件,其输出特性易受到工作环境的制约,基于此利用优化的最大功率点跟踪（MPPT）策略能够可以有效地提高光伏发电系统的发电效率。文章针对传统电导增量法的实时性和容错性缺陷,提出了一种基于变步长电导增量法的自适应MPPT控制算法,该算法引入了一套全新的步长调节方法,能够根据外界环境的变化实时调整扰动步长,在一定程度上解决了辐照强度剧烈变化情况下传统电导增量法动态响应速度慢且容易发生误判的问题。文章通过仿真实验验证了所提算法的有效性和合理性。

英文摘要：

Photovoltaic cell is one of the most fundamental components in the photovoltaic power system,whose output characteristic is partly depended on the corresponding external working environment.Then,utilizing the optimized maximum power point tracking （MPPT） method is beneficial to improve the entire efficiency of the photovoltaie power system.This paper presents a kind of MPPT control strategy according to the indelible defect in terms of instantaneity and fault-tolerant in traditional incremental conductance algorithm.Specifically,the proposed algorithm provides a novel step-size adjustment method,which can guide the modulation of the step-size based on the variable external environment.Meanwhile,it can address the issues of slow dynamic response and misjudgment in traditional incremental conductance algorithm under the polytropical illumination intensity.Finally,a series of computer experiments are conducted to verify the effectiveness and validity of the entire scheme.