本文選題：直流微電網(wǎng) + 分布式控制��； 參考：《控制理論與應(yīng)用》2017年08期

【摘要】：直流微電網(wǎng)中,大部分控制器在設(shè)計時未考慮通信延時對系統(tǒng)性能的影響,這可能會導致控制器在實際應(yīng)用中失效甚至影響系統(tǒng)的穩(wěn)定性.本文基于一種分布式控制策略,建立了直流微電網(wǎng)系統(tǒng)的時滯模型,重點研究了通信延時對系統(tǒng)穩(wěn)定性的影響.結(jié)合Razumikhin穩(wěn)定性理論,提出了一種針對時變時滯系統(tǒng)的全時滯穩(wěn)定性判據(jù).為了更加適用于實際系統(tǒng),在另一種全時滯穩(wěn)定性判據(jù)的基礎(chǔ)上,對系統(tǒng)時滯相關(guān)穩(wěn)定性進行分析,得到保證系統(tǒng)穩(wěn)定的延時上界,進而給出了一種確定控制參數(shù)范圍的方法.與傳統(tǒng)的將通信延時處理為一階慣性環(huán)節(jié)的分析方法相比,基于時滯系統(tǒng)的分析方法更切合實際,為系統(tǒng)的穩(wěn)定運行提供了一個更寬的時滯范圍,提高了系統(tǒng)的可靠性.仿真和實驗結(jié)果表明本文提出的控制參數(shù)設(shè)計方法能保證系統(tǒng)在最大延時下的穩(wěn)定運行.
[Abstract]:In DC microgrid, most controllers are designed without considering the effect of communication delay on system performance, which may lead to the failure of controller in practical application and even affect the stability of the system. Based on a distributed control strategy, the delay model of DC microgrid system is established in this paper, and the influence of communication delay on the stability of the system is studied. Based on Razumikhin stability theory, a full delay stability criterion for time-varying time-delay systems is proposed. In order to be more suitable for practical systems, the delay-dependent stability of the system is analyzed on the basis of another stability criterion with full delay, and the upper bound of delay is obtained to ensure the stability of the system, and a method to determine the range of control parameters is given. Compared with the traditional analysis method which treats the communication delay as the first order inertial link, the analysis method based on the time-delay system is more practical, which provides a wider time-delay range for the stable operation of the system and improves the reliability of the system. Simulation and experimental results show that the proposed control parameter design method can ensure the stable operation of the system under the maximum delay.
【作者單位】： 中南大學信息科學與工程學院;
【基金】：國家自然科學基金項目(51677194) 國家高技術(shù)研究發(fā)展計劃項目(“863”計劃)(2015AA050604) 湖南省重點科技計劃項目(2016GK2039)資助~~
【分類號】：TM727
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本文編號：1901388