A distributed cooperative control strategy for MGC considering transient fluctuations in topology switching

Abstract

Microgrid clusters （MGCs）， comprising distributed clean energy sources， play a pivotal role in fostering source-grid-load-storage interaction and efficient utilization of distributed new energy sources. To give full play to the advantages of mutual power support and cooperative MGC operation， electrical boundaries of microgrids can be dynamically adjusted through contact switches to realize source-load transfer and flexible scheduling of regional resources. Given the transient impact caused by the topology switching of MGC， the seamless transfer strategy of distributed supply and demand power and the method of load transfer selection in emergencies are proposed. By reducing the tie line interaction power through cooperative control of distributed power sources， the inrush current during the switching of the contact line is reduced， and power distribution and voltage deviation restoration within each microgrid are implemented. Compared with the conventional optimization strategies focusing on topology reconfiguration， the fluctuations in topology switching can be mitigated by distributed control， which effectively utilizes the potential of distributed power utilization and improves the power supply reliability of the MGC in case of failure.

Keywords

• mgc
• cooperative dg control
• transient fluctuation
• seamless transfer