Robust Load Frequency Control on Ship Integrated Power System Using H∞ and μ-Synthesis Approaches

Jian Chen ； Dan Yu ； Xihuai Wang ； Hongyue Li

《International Core Journal of Engineering》 5卷10期 (2019/09) Pp. 305-318

https://doi.org/10.6919/ICJE.201909_5(10).0044

摘要

This paper focuses on Load Frequency Control (LFC) on ship Integrated Power System (IPS). In the ship IPS with energy storage, the load frequency is fluctuated significantly by external disturbance such as the load change and internal parameters perturbation such as battery internal resistance, damping or inertia coefficient of power system, and hence design a controller to keep the frequency stable is necessary. In response to these problems, the H∞ and μ-synthesis robust control approaches respectively based on mixed sensitivity principle and structure singular value are used to deal with the load frequency control. In the proposed control scheme, the batteries are utilized to balance the load power and diesel generators output power and the state space model of two-area interconnected power system on the ship is established. The controllers' robust stability and robust performance based on H∞ and μ-synthesis are verified in the presence of external disturbances and parametric perturbation. The results are simulated in computer and compared with classical PI controller. It is show that both the H∞ and μ-synthesis controllers have good performances than classical PI controller and the μ-synthesis controller provides better performance than the H∞ control method due to considering parameter perturbation.

關鍵字

Load frequency control ； Ship integrated power system ； H∞ control ； μ-synthesis analysis ； Robust control ； Uncertainty

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