Research on power quality improvement system based on dynamic voltage restorer

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-26 DOI:10.1049/pel2.12696

Ancheng Liu, Yipei Wang, Yaochen Zhu, Sung-Jun Park

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Abstract

Power quality is a critical issue in power systems that can affect the performance and reliability of sensitive equipment. The dynamic voltage restorer (DVR) is a widely used technology for improving power quality, but it mainly focuses on mitigating voltage sags and often neglects the issue of harmonic distortion. This paper proposes a DVR voltage compensation strategy based on the discrete Fourier transform (DFT). This strategy utilizes the DFT to analyze the voltage waveform, separating the fundamental and desired harmonic components. With this strategy, the DVR can effectively compensate for voltage sag and achieve selective harmonic compensation, thereby improving the power quality of the power system. Additionally, a method utilizing hardware circuitry and an LED as a timestamp is proposed to dynamically estimate digital siginal processor (DSP) resource occupancy rate in real-time, ensuring effective compensation while minimizing resource occupancy. A 3 kW DVR experimental prototype was constructed and tested to evaluate the practicality of the proposed strategy. The simulation and experimental results show that the method proposed in this paper successfully realizes the compensation of voltage sag and harmonics in the power system, and improves the stability and reliability of the power system.

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基于动态电压恢复器的电能质量改善系统研究

电能质量是电力系统中的一个关键问题，会影响敏感设备的性能和可靠性。动态电压恢复器（DVR）是一种广泛应用的改善电能质量的技术，但它主要侧重于缓解电压骤降，往往忽略了谐波畸变问题。本文提出了一种基于离散傅立叶变换（DFT）的 DVR 电压补偿策略。该策略利用 DFT 分析电压波形，分离出基波和所需谐波成分。利用这一策略，DVR 可以有效补偿电压下陷，并实现选择性谐波补偿，从而改善电力系统的电能质量。此外，还提出了一种利用硬件电路和 LED 作为时间戳的方法，以实时动态估计数字信号处理器（DSP）的资源占用率，从而在确保有效补偿的同时最大限度地减少资源占用。构建并测试了一个 3 kW DVR 实验原型，以评估所提策略的实用性。仿真和实验结果表明，本文提出的方法成功实现了对电力系统中电压骤降和谐波的补偿，提高了电力系统的稳定性和可靠性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.