利用不变椭球计算负载和线路不确定性条件下孤岛微电网的稳健分散式即插即用电压跟踪器

Q1 Chemical Engineering
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引用次数: 0

摘要

由分布式发电机组(DGs)组成的微电网(MGs)会受到即插即用操作(PnP)、线路(连接 DGs)参数不确定性和负载变化的影响。本文开发的鲁棒分散电压跟踪器可确保孤岛微电网的稳健性和真实运行。所提出的控制器设计具有以下优点:1)完全分散;2)可扩展;3)在出现 DG 的 PnP、负载变化和线路参数不确定性时仍能保持稳健的稳定性。利用线性矩阵不等式凸优化建立了一个充分条件来解决该问题。MG 的负荷变化和线路参数被模拟为规范约束不确定性。建议的控制器使用来自 DG 的本地测量值,即通过将全局系统分解为子系统来实现分散控制。对于每个子系统,系统的其他影响被视为干扰,必须将其影响降至最低。所提出的干扰抑制控制算法基于无量椭圆法。使用 MATLAB /Sim PowerSystems 工具箱执行了多个时域场景,如连接和断开多个风电机组、本地负载变化和输电线路参数变化,以评估所建议的控制器的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Robust decentralized plug and play voltage tracker of islanded microgrids under loads and lines uncertainties by the invariant ellipsoids

Microgrids (MGs) comprising of distributed generation units (DGs) are subjected to plug-and-play operation (PnP), lines (connecting the DGs) parameters uncertainty, and load changes. Robust stability and an authentic operation for islanded microgrids can be guaranteed through a robust decentralized voltage tracker developed in this paper. The proposed controller design has the following merits: 1) fully decentralized, 2) scalable, and 3) maintains robust stability against PnP of DGs, load changes, and lines parameters’ uncertainties. A sufficient condition is developed by linear matrix inequality convex optimization is exploited to solve the problem. The MGs’ changes in load and the line's parameters are modelled as norm-bounded uncertainties. The suggested controller uses local measurements from DGs, i.e., decentralized by the decomposition of the global system into subsystems. For each subsystem, the rest of the system's impact is considered disturbances, whose influence must be minimized. The proposed disturbance rejection control algorithm is based on the method of invariant-ellipsoids. Several time-domain scenarios such as connecting and disconnecting a number of DGs, local load changes, and variation of transmission line parameters are executed to assess the suggested controller's effectiveness, using MATLAB /Sim PowerSystems Toolbox.

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来源期刊
Journal of King Saud University, Engineering Sciences
Journal of King Saud University, Engineering Sciences Chemical Engineering-Fluid Flow and Transfer Processes
CiteScore
12.10
自引率
0.00%
发文量
87
审稿时长
63 days
期刊介绍: Journal of King Saud University - Engineering Sciences (JKSUES) is a peer-reviewed journal published quarterly. It is hosted and published by Elsevier B.V. on behalf of King Saud University. JKSUES is devoted to a wide range of sub-fields in the Engineering Sciences and JKSUES welcome articles of interdisciplinary nature.
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