Abstract
This paper proposes a new configuration and novel reclosing procedure of a distribution system with a battery energy storage system (BESS) used as an uninterruptible power supply (UPS) in a smart grid. The proposed new configurations of the distribution systems are the installation of a circuit breaker (CB) on both sides of the distribution line, the replacement of the recloser with a CB and protective relay, and the requirement of a communication method. The proposed reclosing procedure performs the reclosing of the CB at the load side and then judges the fault clearance using the load current. If the fault is cleared, the synchronism checking between the main source and the BESS is performed. After completing this, the CB at the main source side is reclosed. The smart grid environment, including a new distribution system, BESS, and reclosing method are modeled with the Electromagnetic Transients Program (EMTP)/ATPDraw. To verify the proposed method, the various simulations according to the fault clearance time are performed and analyzed. The simulation results show that the BESS can be operated as a UPS and successful reclosing is possible.
Highlights
For the establishment of a smart grid, a field test and related research on the connection of a battery energy storage system (BESS) to the distribution system have been carried out
We propose the new configuration and novel reclosing reclosing procedure of a distribution system utilizing a BESS as a uninterruptible power supply (UPS) in a smart grid
This paper proposes a novel reclosing method considering the BESS
Summary
For the establishment of a smart grid, a field test and related research on the connection of a battery energy storage system (BESS) to the distribution system have been carried out. The field test of the BESS for frequency regulation has been carried out at the Jochon Substation in Jeju, Korea. In [1,2,3,4,5], the control strategies for the output smoothing through linkage of the BESS and renewable energy were discussed. In [12,13,14] the control strategy for frequency regulation and peak load shaving using a BESS was discussed. As more and more BESSs for smart grids will be adopted in power distribution networks, utilities will have to adapt/change their practices/procedures with respect to the interconnection of BESSs. the previous references do not explore this issue. This paper focuses on the reclosing study among various practices/procedures
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