A Scalable Strategy for Consensus-Based Secondary Reliable Control of DC Microgrids by Graph Decomposition
作者单位：Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronic Engineering and Automation Shanghai University
会议名称：《第35届中国过程控制会议》
会议日期：1000年
学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学]
关 键 词：DC microgrids Consensus algorithms Graph Decomposition ADMM
摘 要：This article examines a consensus-based method for reliable distributed secondary control in DC microgrids（mGs）,focusing on achieving effective current sharing and voltage balancing. To accomplish this objective, it is assumed that each Distributed Generation Unit（DGU） is equipped with a decentralized primary controller to maintain voltage stability. However,the core issue is that the problem exhibits non-convexity and demonstrates poor scalability as the size of DC mGs ***, Our objective is to develop a scalable strategy for distributed H control design. considering limited model information exchange and arbitrary control structures. To achieve this, we adopt a graph-theoretical perspective for the structured optimal H design of DC mGs, incorporating linear matrix inequality（LMI） constraints. By utilizing chordal graph decomposition,we decompose the design problem into low-dimensional problems with coupled constraints. Finally, we introduce a scalable strategy based on the alternating direction method of multipliers（ADMM） to solve the H optimization problem. This strategy ensures the stability of the closed-loop DC m Gs system by tolerating certain faults in DC mGs components through limited model information exchange.