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基于FOPDT模型和CHR方法的飞轮储能集成微电网控制

FOPDT model and CHR method based control of flywheel energy storage integrated microgrid.

作者信息

Varshney T, Waghmare A V, Meena V P, Singh V P, Ramprabhakar J, Khan Baseem, Singh S P

机构信息

Department of EECE, Sharda University, Greater Noida, UP, 201310, India.

Department of Electrical Engineering, Malaviya National Institute of Technology, Jaipur, Rajasthan, 302017, India.

出版信息

Sci Rep. 2024 Sep 16;14(1):21550. doi: 10.1038/s41598-024-72131-6.

DOI:10.1038/s41598-024-72131-6
PMID:39284872
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11405521/
Abstract

The main causes of frequency instability or oscillations in islanded microgrids are unstable load and varying power output from distributed generating units (DGUs). An important challenge for islanded microgrid systems powered by renewable energy is maintaining frequency stability. To address this issue, a proportional integral derivative (PID) controller is designed in this article. Firstly, islanded microgrid model is constructed by incorporating various DGUs and flywheel energy storage system (FESS). Further, considering first order transfer function of FESS and DGUs, a linearized transfer function is obtained. This transfer function is further approximated into first order plus time delay (FOPTD) form to design PID control strategy, which is efficient and easy to analyze. PID parameters are evaluated using the Chien-Hrones-Reswick (CHR) method for set point tracking and load disturbance rejection for 0% and 20% overshoot. The CHR method for load disturbance rejection for 20% overshoot emerges as the preferred choice over other discussed tuning methods. The effectiveness of the discussed method is demonstrated through frequency analysis and transient responses and also validated through real time simulations. Moreover, tabulated data presenting tuning parameters, time domain specifications and comparative frequency plots, support the validity of the proposed tuning method for PID control design of the presented islanded model.

摘要

孤立微电网中频率不稳定或振荡的主要原因是负载不稳定以及分布式发电单元（DGU）的功率输出变化。对于由可再生能源供电的孤立微电网系统而言，一个重要挑战是维持频率稳定。为解决此问题，本文设计了一种比例积分微分（PID）控制器。首先，通过纳入各种分布式发电单元和飞轮储能系统（FESS）构建孤立微电网模型。进一步地，考虑飞轮储能系统和分布式发电单元的一阶传递函数，得到线性化传递函数。该传递函数进一步近似为一阶加时滞（FOPTD）形式，以设计高效且易于分析的PID控制策略。使用Chien-Hrones-Reswick（CHR）方法评估PID参数，以实现设定值跟踪以及针对0%和20%超调量的负载扰动抑制。与其他讨论的整定方法相比，用于20%超调量负载扰动抑制的CHR方法成为首选。通过频率分析和暂态响应证明了所讨论方法的有效性，并通过实时仿真进行了验证。此外，列出的整定参数、时域规范和比较频率图数据，支持了所提出的整定方法对所呈现的孤立模型进行PID控制设计的有效性。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6afa/11405521/e4bee5213d34/41598_2024_72131_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6afa/11405521/51eb5f2289c5/41598_2024_72131_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6afa/11405521/4bbbe5f18343/41598_2024_72131_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6afa/11405521/9dda22b6ec53/41598_2024_72131_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6afa/11405521/7a3e6e7b96fa/41598_2024_72131_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6afa/11405521/601d9cf53625/41598_2024_72131_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6afa/11405521/fee9d1bdcaf7/41598_2024_72131_Fig13_HTML.jpg

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