Frequency control of power systems under uncertain disturbances based on input-output finite-time stability

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Lixuan Zhu, Yiping Yu, Ping Ju
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引用次数: 0

Abstract

In modern power systems, the uncertainty and volatility of generation and loads greatly increase the balance discrepancy between the power supply and demand, creating major potential security hazards. To limit out-of-bound frequencies, an effective frequency control method for power systems with interval uncertain disturbances is proposed. Based on the state space model of the system frequency response with delays, linear matrix inequalities are constructed based on the input‒output finite-time stability of the system frequency. By searching for the output feedback gain and altering the time delay with the Padé approximation, the feasibility of the linear matrix inequalities is improved, and a frequency controller is designed. The simulation results show that the proposed method can effectively control frequency deviations. When the closed-loop system is disturbed by uncertain power fluctuations, its frequency will always remain within the allowable range to ensure the secure operation of the power system.

Abstract Image

基于输入输出有限时间稳定性的不确定扰动下的电力系统频率控制
在现代电力系统中,发电和负荷的不确定性和波动性大大增加了电力供需之间的平衡差异,造成了重大的安全隐患。为了限制超限频率,本文提出了一种针对具有区间不确定性扰动的电力系统的有效频率控制方法。根据带延迟的系统频率响应状态空间模型,构建了基于系统频率输入输出有限时间稳定性的线性矩阵不等式。通过寻找输出反馈增益和改变 Padé 近似的时间延迟,提高了线性矩阵不等式的可行性,并设计了频率控制器。仿真结果表明,所提出的方法能有效控制频率偏差。当闭环系统受到不确定功率波动的干扰时,其频率将始终保持在允许范围内,以确保电力系统的安全运行。
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
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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