Development of Reclosing Method in a Distribution System with Distributed Generation and Battery Energy Storage System

Abstract

The connection of distributed generation (DG) and a battery energy storage system (BESS) in distribution systems has recently been increasing. However, little research has been conducted on the reclosing of the distribution system when both the DG and BESS are connected. Therefore, this paper proposes a new reclosing method for a distribution system with a DG and BESS. The proposed method also has a circuit breaker (CB) installed in the distribution line. A CB close to the DG and BESS is first reclosed after a fixed dead time and, then, the fault clearance is detected using the current flowing to the fault point. Once the fault is cleared, the reclosing of the CB at the source side is attempted after completing a synchronism check. The proposed method is modeled using an electromagnetic transient program. We perform various simulations according to the capacities of the DG and the fault clearance time, and analyze the simulation results. The simulation results show that steady-state power is supplied to the load from the DG and BESS before reclosing to prevent outage, and that the reclosing is successfully performed.

Uninterrupted power supply to BESS based microgrid system using adaptive reclosing approach

“…© 2020 The Authors. IET Generation, Transmission & Distribution published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology not available [4]. The use of an adaptive reclosing scheme provides adaptive dead time by sensing the exact instant of fault clearance [5][6][7].…”

“…During this dead time, BESS often gets unnecessarily engaged even if fault gets cleared. It also causes increased outages in the other non-critical loads or sections where a backup system is not available [4]. The use of an adaptive reclosing scheme provides adaptive dead time by sensing the exact instant of fault clearance [5][6][7].…”

Systematization of the Simulation Process of Transformer Inrush Current Using EMTP

“…Therefore, this paper establishes the simulation process of transformer inrush current using EMTP, which simulates transient electromagnetic phenomena and is one of the most widely used electric utilities programs. Alternative Transients Program Draw (ATPDraw) is a graphical, mouse-driven pre-processor to the ATP version of EMTP [18][19][20]. Based on the established simulation process, the simulation example of transformer inrush current is presented using 154 kV transformer test data in Korea.…”