| H∞ control of DC bus voltage in uncertain AC/DC microgrid with time delays |
| 投稿时间：2023-07-18 修订日期：2024-01-21 |
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| English Abstract: |
| Aiming at the problem of DC bus voltage stability of uncertain AC/DC microgrid with communication network delay, a method combining state space method and impedance analysis method is proposed to construct a norm-bounded uncertain AC/DC microgrid model with time delay. Based on the solution of the robust quadratic stability of the system, the conditions of the delay-independent state feedback controller satisfying the H∞ control performance are obtained. Then, by using S-procedure theorem, a method is proposed to reduce the difficulty of functional construction of delay-dependent Lyapunov method without taking the derivative again. By citing the Wirtinger integral inequality and the free matrix integral inequality, a delay-dependent H∞ controller is obtained. Simulation analysis shows that the proposed control method can suppress the effect of uncertain parameters on DC bus voltage under certain communication delay constraints. |
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| English and key words:H∞ controller AC/DC microgrid DC bus voltage uncertain system time-delay system |
| 基金项目:国家重点研发计划项目(2022YFE0105200) |
| DOI：10.16081/j.epae.202401017 |
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