A Current Sensorless Delay–Based Control Scheme for MPPT–Boost Converters in Photovoltaic Systems
A Current Sensorless Delay–Based Control Scheme for MPPT–Boost Converters in Photovoltaic Systems
复制标题
光伏系统中 MPPT-Boost 转换器的基于电流无传感器延迟的控制方案
DOI：
10.1109/access.2020.3024566
复制
发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
Ernesto Bárcenas
中科院分区：
文献类型：
--
作者：
J. Hernandez;C. Méndez‐Barrios;S. Niculescu;Ernesto Bárcenas
针对采用Boost DC/DC转换器的MPPT方案，设计了一种基于无电流传感器延迟的光伏系统闭环镇定控制器。这种拓扑的一些应用是直流微电网、太阳能车辆或独立系统，仅举几例。该控制方案的基础是反馈线性化控制技术和基于时滞的低阶控制器相结合。为了研究稳定性，该方法采用几何观点，允许将控制器参数空间划分为具有相似稳定性特征(相同数目的不稳定特征根)的区域。本文最重要的贡献在于提供了实用的指导方针来调整所提出的基于时滞的控制器的增益，确保闭环系统的渐近稳定性，并满足光伏应用的要求。此外，所提出的方法允许设计关于控制器增益的非脆弱控制器。此外，为了验证所提出的控制方案的有效性，以太阳能电池阵列模拟器和电池组为负载，给出了闭环系统在设定值变化和突变照度干扰下的性能评估实验结果。
The results presented in this paper deal with the design of a current sensorless delay–based controller for the closed–loop stabilization of a photovoltaic system under an MPPT scheme using a boost dc/dc converter. Some applications of such topology are dc microgrids, solar vehicles, or stand-alone systems, to mention a few. The basis of this control scheme relies on the feedback linearization control technique coupled with a delay–based low-order controller. In order to study the stability, the proposed approach uses a geometric point of view which allows the partitioning of the controller parameters space into regions with similar stability characteristics (same number of unstable characteristic roots). The most important contribution of the paper relies on providing practical guidelines to tune the gains of the proposed delay–based controller, ensuring asymptotic stability of the closed–loop system and fulfilling the requirements for photovoltaic applications. In addition, the proposed approach allows the design a non-fragile controller with respect to the controller gains. Furthermore, in order to test the effectiveness of the control scheme presented, experimental results evaluating the closed–loop system performance under set-point changes and abrupt irradiance disturbances are addressed using a solar array simulator and a battery bank as load.