论文标题
高级两阶段网格连接的光伏系统：分数订单控制器
An Advanced Two-Stage Grid Connected PV System: A Fractional-Order Controller
论文作者
论文摘要
本文介绍了针对网格连接的PV系统的基于分数阶（FO）的控制器。单相两阶段网格连接的光伏发电机（PVG）用于测试FO控制器的性能。提出的控制器的主要目标是：（1）在绘制最大功率的点处调节PVG的输出电压。 （2）恒定直流链路电压控制。 （3）逆变器输出的功率因数控制（PFC），总谐波失真（THD）。为了解决第一个问题，使用一种称为分数后式式控制控制（FOBSC）的非线性控制方法来调节PVG的输出电压。一种称为扰动和观察（P＆O）的最大功率点跟踪（MPPT）技术用于生成参考电压，该参考电压适用于跟踪最大发电的PVG。生成的参考用于使用FOBSC调节PVG的输出电压。使用基于FO的PI控制器解决DC-Link电压波动问题。最后一个目标是使用FOBSC实现的，以获得网格的最大功率因数。 Lyapunov候选功能用于验证系统的稳定性。为了测试所提出的控制器的性能，将其与常规已知的整数（IO）控制器进行比较。结果表明，系统的THD和效率有显着提高。与IO控制器相比，拟议的控制器分别以100％，80％和70％的发电能力分别提供0.94％，1.43％和1.86％的THD。系统的整体效率在100％，80％和70％的动态功能的情况下，在FO控制器的情况下会更好。
A fractional-order (FO) based controller for a grid-connected PV system is presented in this paper. A single phase two-stage grid-connected photovoltaic generator (PVG) is used to test the performance of the FO controller. The main objectives of the proposed controller are: (1) To regulate the output voltage of PVG at a point where the maximum power is drawn. (2) Constant DC-link voltage control. (3) Power factor control (PFC) at the inverter output with low total harmonic distortion (THD). To solve the first problem, a non-linear control method known as fractional-order back-stepping control (FOBSC) is used to regulate the output voltage of PVG. A maximum power point tracking (MPPT) technique known as perturb and observe (P & O) is used to generate a reference voltage which is suitable for tracking the maximum power generation of PVG. The generated reference is used to regulate the output voltage of PVG using FOBSC. The DC-link voltage fluctuation issue is tackled using FO based PI controller. The last objective is achieved using FOBSC to obtain maximum power factor of the grid. Lyapunov candidate function is used to verify the stability of the system. To test the performance of the proposed controller, it is compared to conventionally known Integer-order (IO) controller. Results have shown a significant improvement in THD and efficiency of the system. The proposed controller offers 0.94%, 1.43% and 1.86% lower THD in comparison with IO controller at 100%, 80% and 70% of the power generation capacity of PVG, respectively. The overall efficiency of the system for 100%, 80%, and 70% of the dynamic powers of the system is noticed to be better in case of FO controller.
