Open AccessVoltage and frequency control during microgrid islanding in a multi‐area multi‐microgrid system
Author(s) -
John Thomas,
Ping Lam So
Publication year - 2017
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2016.1113
Subject(s) - islanding , microgrid , control theory (sociology) , voltage , automatic frequency control , electric power system , computer science , power (physics) , electronic engineering , engineering , control (management) , electrical engineering , telecommunications , artificial intelligence , physics , quantum mechanics
This study presents a control method to regulate load voltage and system frequency during microgrid islanding in a multi‐area multi‐microgrid (MMG) system. In the event of islanding of a microgrid from the distribution grid in the proposed MMG system, load voltage of the islanded microgrid and system frequency are affected. To overcome these problems, a control system for the MMG system is proposed. The proposed control system facilitates desired power exchange between grid‐connected and islanded microgrids, and achieves effective voltage and frequency regulation in the MMG system. The main significance of the proposed MMG system is that multiple microgrids in different locations can be interconnected to meet larger bulk power demands. This ensures improved reliability and security of power supply in the MMG system. An improved model predictive control (MPC) algorithm is used to regulate various parameters such as output voltage, frequency and power of the inverters in the MMG system. The proposed MMG system is tested during islanding and load shedding using simulation studies. The simulation studies show that the inverters can operate effectively using MPC to provide the desired voltage, frequency and power during islanding and load shedding.