Comparative study of the techniques’ performance.

Diesel engines (DEs) commonly power pumps used in agricultural and grassland irrigation. However, relying on unpredictable and costly fuel sources for DEs pose’s challenges related to availability, reliability, maintenance, and lifespan. Addressing these environmental concerns, this study introduces an emulation approach for photovoltaic (PV) water pumping (WP) systems. Emulation offers a promising alternative due to financial constraints, spatial limitations, and climate dependency in full-scale systems. The proposed setup includes three key elements: a PV system emulator employing back converter control to replicate PV panel characteristics, a boost converter with an MPPT algorithm for efficient power tracking across diverse conditions, and a motor pump (MP) emulator integrating an induction motor connected to a DC generator to simulate water pump behaviors. Precise induction motor control is achieved through a controlled inverter. This work innovatively combines PV and WP emulation while optimizing system dynamics, aiming to develop a comprehensive emulator and evaluate an enhanced control algorithm. An optimized scalar control strategy regulates the water MP, demonstrated through MATLAB/Simulink simulations that highlight superior performance and responsiveness to solar irradiation variations compared to conventional MPPT techniques. Experimental validation using the dSPACE control desk DS1104 confirms the emulator’s ability to faithfully reproduce genuine solar panel characteristics.

柴油发动机（DEs）常作为农业与草原灌溉水泵的动力来源。但柴油发动机需依赖难以预测且成本高昂的燃料，会带来可用性、可靠性、维护难度及使用寿命等多方面的挑战。为应对这些环境与使用层面的问题，本研究提出了一种面向光伏（photovoltaic, PV）水泵（WP）系统的仿真方案。鉴于实际规模系统存在资金约束、空间局限以及气候依赖性等局限，仿真技术成为极具前景的替代方案。本次搭建的系统包含三大核心组件：一是采用反激变换器（back converter）控制以复现光伏面板特性的光伏系统仿真器；二是搭载最大功率点跟踪（MPPT）算法的升压变换器，可在多样工况下实现高效功率追踪；三是集成感应电动机与直流发电机的电机水泵（MP）仿真器，用以模拟水泵的运行行为。借助受控逆变器可实现感应电动机的精准控制。本研究创新性地将光伏与水泵仿真技术相结合，并对系统动力学进行优化，旨在开发一套完整的仿真平台并评估改进后的控制算法。研究采用优化后的标量控制策略对电机水泵进行调控，通过MATLAB/Simulink仿真验证可知，相较于传统最大功率点跟踪技术，该方案在性能表现以及对太阳辐照度变化的响应速度上均更具优势。借助dSPACE控制桌DS1104开展的实验验证结果证实，该仿真器能够精准复现真实光伏面板的特性。