文章摘要
李一琳,董萍,刘明波,等.基于有限时间一致性的直流微电网分布式协调控制[J].电力系统自动化,2018,42(16):96-103. DOI: 10.7500/AEPS20170907003.
LI Yilin,DONG Ping,LIU Mingbo, et al.Distributed Coordinated Control of DC Microgrid Based on Finite-time Consensus Algorithm[J].Automation of Electric Power Systems,2018,42(16):96-103. DOI: 10.7500/AEPS20170907003.
基于有限时间一致性的直流微电网分布式协调控制
Distributed Coordinated Control of DC Microgrid Based on Finite-time Consensus Algorithm
DOI:10.7500/AEPS20170907003
关键词: 直流微电网  分布式控制  有限时间一致性  分层结构
KeyWords: DC microgrid  distributed control  finite-time consensus  hierarchical control
上网日期:2018-07-17
基金项目:国家重点基础研究发展计划(973计划)资助项目(2013CB228205);中央高校基本科研业务费专项资金资助项目(2015ZZ017);国家自然科学基金资助项目(51107042)
作者单位E-mail
李一琳 华南理工大学电力学院, 广东省广州市 510640  
董萍 华南理工大学电力学院, 广东省广州市 510640 epdping@scut.edu.cn 
刘明波 华南理工大学电力学院, 广东省广州市 510640  
林赟 华南理工大学电力学院, 广东省广州市 510640  
摘要:
      直流微电网的主要控制目标是维持母线电压稳定及实现负荷的按比例分配。为克服直流微电网采用集中式控制的缺陷,提出了一种分布式的协调控制策略。该控制策略利用分层结构,在原始下垂控制的基础上引入电压二次控制及发电成本运行控制,各发电单元仅与相邻通信单元进行信息交互,通过有限时间一致性算法,最终实现电压稳定及发电成本最小等多控制目标。所提控制策略兼具分层控制与有限一致性控制的优点,灵活性高、鲁棒性强、收敛性能好。为了验证所提出的控制策略,搭建了相应的直流微电网模型,并对电源投退、负荷波动等不同场景进行了仿真,算例结果验证了该策略的有效性。
Abstract:
      The main control objectives of DC microgrid are to maintain the bus voltage stability and realize the proportional distribution of loads. In order to overcome the shortcomings of the centralized control of DC microgrid, a distributed coordinated control strategy is proposed. By using the hierarchical structure, the voltage secondary control and the operation control of the power generation cost are introduced into the control strategy based on the original droop control, and the power generation unit only exchanges information with the adjacent communication unit, thus the control objectives of the voltage stability and minimum generation cost are finally realized through the finite-time consensus algorithm. The proposed control strategy has both the advantages of hierarchical control and limited consistency control with high flexibility, robustness and good convergence. To verify the proposed control strategy, a corresponding DC microgrid model is built to simulate different scenarios such as power supply switching on and off, load fluctuation. Effectiveness of the proposed strategy is verified by numerical examples.
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