NDLI: Advanced unified decentralised control method with voltage restoration for DC microgrids

Content Provider	IET Digital Library
Author	Xia, Yanghong Peng, Yonggang Hu, Huiyong Wang, Yu Wei, Wei
Abstract	This study introduces an advanced decentralised control method for DC microgrids which can be adopted both in the grid-connected mode and the islanded mode with a small change. Compared with the conventional droop control methods, there are three improvements in this proposed control method. First, in the grid-connected mode, the proposed control method can output the specified current, which is useful for the economic dispatch of the microgrid. Second, in the islanded mode, the proposed control method can realise accurate current sharing among distributed generations (DGs). Third, in the islanded mode, the proposed control method can directly restore the average voltage of the bus without the extra secondary control, which can ensure the power quality and reduce the complexity of the control system. The high reliability of the proposed control method is illustrated by the analysis of the stability. Also, the time-delay effect caused by the finite bandwidth of the communication network is analysed and the limited bandwidth of the communication network can be calculated out. All the conclusions are verified by the corresponding simulation tests based on MATLAB/Simulink, also the real-time hardware-in-loop tests are conducted to evaluate the performance of the control method when applied practically.
Starting Page	861
Ending Page	871
Page Count	11
ISSN	17521416
Volume Number	10
e-ISSN	17521424
Issue Number	Issue 6, Jul (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/10/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2015.0433
Journal	IET Renewable Power Generation
Publisher Date	2016-07-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Advanced Unified Decentralised Control Method Communication Network Control of Electric Power System Dc Microgrid Decentralised Control Delay Distributed Parameter Control System Distributed Power Generation Droop Control Method Economic Dispatch Grid-connected Mode Harmonics Islanded Mode Line Resistance Load Dispatching Multivariable Control System Power Distribution Control Power Distribution Economics Power Quality Power Supply Quality Power System Economics Power System Managemen Power System Operation Real-time Hardware-in-loop Tests Stability Stability in Control Theory Time-delay Theory Voltage Restoration
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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