标题: | 结合降压型直流对直流电源转换器之太阳能板最大功率追踪控制 Maximum Power Point Tracking Control of a Solar Module Combined with the Buck DC-DC Converter |
作者: | 冯佳华 陈永平 Fong, Kah-Hua Chen, Yon-Ping 电机资讯国际学程 |
关键字: | 最大功率点追踪;扰动观察法;增量电导法;可变结构法;Maximum power point tracking;Perturbation and Observation algorithm;Incremental Conductance algorithm;Variable Structure method |
公开日期: | 2015 |
摘要: | 由于太阳能光伏发电系统经常会有低功率与随时会变化的太阳光照射问题,为了解决这些问题,通常采用最大功率点追踪技术(Maximum Power Point Tracking, MPPT)以维持太阳能板的最大功率输出。本论文提出三个不同最大功率点追踪演算法控制太阳能板的最大功率输出,分别为可变结构法(Variable Structure method),扰动观察法(Perturbation and Observation algorithm, P&O)和增量电导法(Incremental Conductance algorithm, INC)。经由模拟结果显示,三个不同最大功率点追踪演算法均可成功的追踪到太阳能板的最大功率点(Maximum Power Point),而其中以增量电导法的稳定度最佳。在实务验证过程当中,扰动观察法和增量电导法的实验结果与理论相符合,并稳定的将输出功率维持在最大功率点;而可变结构法会因为电流感测器的解析度不够,难以量测太阳能板输出电流之微小变化量,导致无法成功追踪其最大功率点。 Since photovoltaic (PV) systems often encounter two problems: low power efficiency and variable solar irradiation. In order to resolve these problems, PV systems must adopt maximum power point tracking (MPPT) technique to maintain the peak output power of the solar module. This thesis proposes three of the MPPT algorithms to control the peak output power of the solar module. These MPPT algorithms are Variable Structure method, Perturbation and Observation algorithm (P&O), and Incremental Conductance algorithm (INC). From the simulation results, all the MPPT algorithms could track the peak output power of the solar module successfully. The INC algorithm is better than the other two MPPT algorithms because it can stay around the maximum power point stably. From the experimental results, only the P&O algorithm and INC algorithm could reach the maximum power point, but the Variable Structure method fails in maximum power point tracking because the current sensor resolution is not able to measure the current change of the solar module. |
URI: | http://etd.lib.nctu.edu.tw/cdrfb3/record/nctu/#GT070260815 http://hdl.handle.net/11536/138762 |
显示于类别: | Thesis |