A novel adaptive control strategy of interconnected microgrids for delay-dependent stability enhancement. (July 2018)

• Record Type: Journal Article
• Authors: Hao, Ran; Ai, Qian; Jiang, Ziqing; Zhu, Yuchao
• Is Part Of: International journal of electrical power & energy systems. Volume 99(2018)
• Page Start: 566
• Page End: 576
• Publication Date: 2018-07
• Subjects: Delay-dependent -- Interconnected microgrid -- Adaptive robust control -- LMI -- Stability enhancement; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2018.01.034
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: A sufficient theorem for ensuring delay-dependent system stability is proved. A distributed robust droop management is applied to adaptive adjust droop control. An H ∞ active stabilizer is designed to eliminate the instability caused by delay. Abstract: To enhance the delay-dependent stability of interconnected microgrids, a novel adaptive control strategy is designed in this paper. Firstly, an adaptive robust control model is established to coordinate multi-MGs energy management. By regulating control parameters, Lyapunov stability without delay can be guaranteed. Secondly, stability evaluation methods considering uncertainty, such as mode perturbation and communication failure, are proposed to analyze delay-independent system. On this basis, to eliminate the adverse effects of delay caused by wide-area measurement, an active disturbance rejection stabilizer is designed here, which can be self-adjust adaptively via delayed time, and doesn't require multiple iterations in the parameters regulation. Through Schur complement theorem, the analytic expression of feedback gains is obtained from linear matrix inequalities. Finally, with an IEEE 118-node test feeder as an example, the numerical simulation verifies the feasibility of the proposed stabilizer under the cases of long delays.