Stability Analysis of Sampled-Data Load Frequency Control Systems With Multiple Delays

被引：40

作者：

Luo, Haocheng ^{[1
]}

Hu, Zechun ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

来源：

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY | 2022年 / 30卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Delays; Stability criteria; Power system stability; Mathematical model; Frequency control; Time-varying systems; Load modeling; Delay margin; delay-dependent stability; linear matrix inequality (LMI); load frequency control (LFC); sampled-data system; POWER-SYSTEMS; COMMUNICATION; GENERATION; CONSTANT;

D O I：

10.1109/TCST.2021.3061556

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The load frequency control (LFC) system equipped with communication networks includes both sampled-data and time-delay characteristics. How to consider both characteristics effectively in stability analysis is of great importance to obtain accurate results. In this brief, we investigate the delay-dependent stability of sampled-data systems with multiple delays by separately considering the effects of sampling and delays. We first build a discrete-time model for an LFC system with both conventional units and energy storage systems, where the effect of time-varying delays is modeled as matrix uncertainty. Based on this model, we propose a stability criterion for delay margin computation using the region-division technique. A heuristic algorithm is further developed to enhance the computational efficiency and accuracy of the proposed criterion. Case studies are carried out to show the effectiveness and advantages of the proposed method.

引用

页码：434 / 442

页数：9

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