中文摘要：

光伏发电是一非线性系统，针对光伏系统易受电网工作方式和工作环境的影响。在分析电导增量法的基础上，利用MATLAB／Simulink搭建了光伏阵列数学模型，针对传统电导增量法存在跟踪速度慢及误判的问题，采用微分一跟踪器方法，对电导增量法进行改进优化。仿真结果表明，采用微分一跟踪器改进后的电导增量法能够快速、准确地跟踪光伏系统最大功率，能够有效抑制各种扰动，减少了误判几率．系统的动态性能及稳定性都优于常规电导增量法，从而提高了系统的鲁棒性。

英文摘要：

Photovoltaic system is nonlinear, photovoltaic power generation is easily affected by grid and working environment. Aiming at the problems such as slow tracking speed, misjudgment existing in the traditional incremental conductance method, a PV array model, which uses differential tracker method to improve the incremental conductance method, is built in MATLAB/Simulink after analyzing incremental conductance method. The simulation results show that, the proposed method can track maximum power point of photovohaic system quickly and accurately, effectively inhibit various distur- bances, reduce the misjudgment rate, dynamic performance and stability of the system is better than that of the conventional incremental conductance method, which improves the robustness of the system.