基于前馈控制的动态电压恢复器(DVR)仿真研究 毕业论文+任务书+模型源文件
摘 要
本文围绕动态电压恢复器（DVR）的仿真研究展开，旨在探讨前馈控制在单相DVR中的应用及其对于电压暂降的治理效果。随着电力需求的日益增长和电能质量要求的提升，DVR作为一种有效的电能质量控制器，对于解决电压跌落问题具有重要意义。
本文首先对DVR的拓扑结构及其理论进行了深入分析，掌握了DVR各环节电能变换的过程和电压暂降治理的数学模型。接着，重点研究了DVR的前馈控制原理，并通过Simulink仿真验证了其在网侧电压波动正负20%时，负载电压的稳定性和调节时间的优越性。仿真结果表明，前馈控制下的单相DVR能够迅速响应电压变化，使负载电压保持稳定，且负载电压的总谐波失真（THD）趋于零。本研究不仅丰富了DVR控制策略的理论体系，也为实际电力系统的电能质量控制提供了有益的参考。
关键词：动态电压恢复器；前馈控制；Simulink仿真；电压暂降；电能质量
Abstract
This paper focuses on the simulation study of dynamic voltage recovery device (DVR), aiming to discuss the application of feedforward control in single-phase DVR and its control effect on temporary voltage drop. With the increasing power demand and the improvement of power quality requirements, DVR, as an effective power quality controller, is of great significance to solve the problem of voltage sag.
This paper firstly analyzes the topological structure of DVR and the theory of DVR, and grasps the process of electric energy transformation and voltage transient control of DVR. Then, we focus on the feedforward control principle of DVR, and verify the stability of the load voltage in the voltage fluctuation of 20% through Simulink simulation. The simulation results show that the single-phase DVR under feedforward control can quickly respond to voltage changes, keep the load voltage stable, and the total harmonic distortion (THD) of the load voltage tends to zero. This study not only enriches the theoretical system of the DVR control strategy, but also provides a useful reference for the power quality control of the practical power system.
Key words: dynamic voltage recovery device; feedforward control; Simulink simulation; voltage temporary drop; power quality
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