Faculty of Science, Department of Physics, University of Maroua, Maroua, Cameroon.
Faculty of Science, Department of Physics, University of Ngaoundere, Ngaoundere, Cameroon.
PLoS One. 2024 Sep 3;19(9):e0309460. doi: 10.1371/journal.pone.0309460. eCollection 2024.
This article presents the contribution of multicellular converters in improving of the quality of power produced in photovoltaic chain, with the aim of exploiting the maximum power produced by the photovoltaic generator with low oscillations around of the maximum power point (MPP) at steady state and to reduce switching losses. After modeling the multicellular parallel boost converter, fractional short circuit current (FSCC) MPPT was modified to get an estimated photocurrent as a reference to control the inductance current for good functioning of the converter in pursuit of the maximum power point. To verify the performance of the proposed solution, the system was submitted to irradiance and temperature variations. The simulations carried out in the Matlab/Simulink environment presented satisfactory results of the proposed solution, in comparison with the high-gain quadratic boost converter we have a response time of 0.04 s, power oscillations at maximum point around 0.05 W and efficiency of 99.08%; in comparison with the interleaved high-gain boost converter the results show a response time of 0.1 s for the transferred power, a very low output voltage ripples of 0.001% and 98.37% as efficiency of the chain. The proposed solution can be connected to a grid with a reduction of level of the inverter and active filter.
本文提出了多单元转换器在提高光伏链中功率质量方面的贡献，旨在利用光伏发电机在稳态时最大功率点（MPP）周围的低振荡来最大限度地提高功率，并降低开关损耗。在对多单元并联升压转换器进行建模后，对分数短路电流（FSCC）MPPT 进行了修改，以获得估计的光电流作为参考，以控制电感电流，使转换器能够良好地工作，以追求最大功率点。为了验证所提出解决方案的性能，系统经受了辐照度和温度变化的影响。在 Matlab/Simulink 环境中进行的仿真结果表明，与我们具有 0.04s 响应时间的高增益二次升压转换器相比，该解决方案在最大功率点周围的功率振荡约为 0.05W，效率为 99.08%；与交错式高增益升压转换器相比，结果表明传输功率的响应时间为 0.1s，输出电压纹波非常低，为 0.001%，链的效率为 98.37%。所提出的解决方案可以与电网连接，从而降低逆变器和有源滤波器的电平。
