光伏发电最大功率点跟踪系统设计及潮流计算

Maximum power point tracking control of photovoltaic generation system design and power flow calculation

由于光伏阵列的输出特性受光照强度和环境温度等外界条件的影响较大,且呈非线性关系。文章首先在Simulink环境下建立了光伏阵列及其MPPT的仿真模型进行仿真处理,然后根据对仿真结果的分析,此模型能够稳定地追踪最大功率,建立稳定的工作状态。最后,采用MPPT控制得到的光伏发电系统的多组输出数据求解数学期望,将期望值经理想化无损逆变后送入改造的IEEE14节点系统,采用牛顿—拉夫逊法进行潮流计算,得到改造的IEEE14节点系统的所有节点数据。

As the output characteristics of photovoltaic(PV)array are greatly affected by external conditions such as light intensity and ambient temperature, and show a non-linear relationship. In this paper, the PV array and its MPPT simulation model were first established in the environment of Simulink for simulation processing. Then, according to the analysis of the simulation results, this model could track the maximum power stably and establish a stable working state. Finally, the multiple sets of the output data of PV array obtained by MPPT system to solve mathematical expectation, by the ideal lossless inversion, mathematical expectation is taken into the modified IEEE14 node system,use the Newton-Raphson method for power flow calculation, and all node data of the modified IEEE14 node system are obtained.