| Title |
Required Capacity Assessment of Energy Storage System for Relieving Operation Condition of SPS Using Generator Acceleration Energy |
| Authors |
송승헌(Seung-Heon Song) ; 최우영(Woo-Yeong Choi) ; 권한나(Han-Na Gwon) ; 국경수(Kyung Soo Kook) |
| DOI |
http://doi.org/10.5370/KIEE.2019.68.1.1 |
| Keywords |
Energy Storage System(ESS) ; Special Protection System(SPS) ; Transient stability |
| Abstract |
Due to the highly concentrated power plants integrated through the limited transmission lines in Korea, a Special Protection System(SPS) has been applied to stabilize the power systems by instantly tripping the pre?determined generators in a large-scaled power plant when a fault occurs on the drawing transmission lines. Moreover, power outputs of those generators are constrained to avoid any activation of Under Frequency Load Shedding(UFLS) even after those generators are tripped by SPS action. For this, this paper proposes a method for calculating the required capacity of Energy Storage System(ESS) expected to relieve the operating constraints to generators using its fast response for controlling power system frequency. The proposed method uses the generator acceleration energy to derive the stable condition during the SPS action. In addition, its effectiveness is verified by the case studies adopting actual SPS operations in Korean power systems. |