Fractional Order PID Controller Incorporated Decoupled Control of Grid Connected Solar Photovoltaic System

IF 1.204 Q3 Energy
K. Aseem, M. Jayakumar, P. Pramod, B. C. Anilkumar, M. Sarith Divakar
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Abstract

In this paper, Fractional-order PID controller incorporated Decoupled Control (FOPID-DC) method is designed for a grid-connected solar PV system. The fractional calculus-based PID controller is used to estimate the effect of harsh weather changes on the inverter dynamics. The outer active and reactive current control loop and the inner DC link voltage control loop of the proposed FOPID-DC operate in a d-q reference frame that is coupled to the grid voltage vector. The suggested FOPID-DC avoids the drawbacks of the traditional PID controller while maintaining the advantages of the fractional controller. The performance of error tracking is greatly enhanced by the use of fractional operators. The studies are carried out in MATLAB Simulink. To establish the improved dynamic performance of the FOPID-DC, a comprehensive comparative study was carried out between the conventional PID controller combined with decoupled controller (PID-DC) and the FOPID-DC. The performance of the FOPID controller incorporated decoupled controller is assessed under different environmental conditions. Under various stochastic climatic conditions, the key performance indicators, such as DC ink voltage, PV power, and the grid-side quadrature axis current, are plotted. Under these climatic test conditions, time domain metrics such as rise time, maximum overshoot, and settling time are tabulated for PID-DC and FOPID-DC. To illustrate the supremacy of the recommended controller, a radar plot of the DC link voltage error was also plotted. The proposed FOPID-DC is more resilient, efficient, and effective at mitigating the uncertainties brought on by abrupt changes in weather and has a simple control structure.

Abstract Image

Abstract Image

并网太阳能光伏系统的分数阶 PID 控制器解耦控制
摘要 本文为并网太阳能光伏系统设计了结合解耦控制(FOPID-DC)方法的分数阶 PID 控制器。基于分数微积分的 PID 控制器用于估计恶劣天气变化对逆变器动态的影响。所建议的 FOPID-DC 的外部有功和无功电流控制环路以及内部直流链路电压控制环路在与电网电压矢量耦合的 d-q 参考框架中运行。建议的 FOPID-DC 既避免了传统 PID 控制器的缺点,又保持了分数控制器的优点。分数算子的使用大大提高了误差跟踪性能。研究在 MATLAB Simulink 中进行。为了确定 FOPID-DC 所改善的动态性能,对结合解耦控制器(PID-DC)的传统 PID 控制器和 FOPID-DC 进行了全面的比较研究。在不同的环境条件下,对结合了解耦控制器的 FOPID 控制器的性能进行了评估。在各种随机气候条件下,绘制了直流墨水电压、光伏功率和电网侧正交轴电流等关键性能指标。在这些气候测试条件下,列出了 PID-DC 和 FOPID-DC 的上升时间、最大过冲和稳定时间等时域指标。为了说明推荐控制器的优越性,还绘制了直流链路电压误差雷达图。所建议的 FOPID-DC 在缓解天气突变带来的不确定性方面更有弹性、更高效、更有效,而且控制结构简单。
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来源期刊
Applied Solar Energy
Applied Solar Energy Energy-Renewable Energy, Sustainability and the Environment
CiteScore
2.50
自引率
0.00%
发文量
0
期刊介绍: Applied Solar Energy  is an international peer reviewed journal covers various topics of research and development studies on solar energy conversion and use: photovoltaics, thermophotovoltaics, water heaters, passive solar heating systems, drying of agricultural production, water desalination, solar radiation condensers, operation of Big Solar Oven, combined use of solar energy and traditional energy sources, new semiconductors for solar cells and thermophotovoltaic system photocells, engines for autonomous solar stations.
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