Suppression Strategy of Ultra-Low Frequency Oscillation in Yunnan Power Grid with BESS
- Resource Type
- Conference
- Authors
- Chen, Yixuan; Zhao, Yuanxiao; Geng, Guangchao; Jiang, Quanyuan; Liu, Wenlong; Li, Lingfang
- Source
- 2019 North American Power Symposium (NAPS) Power Symposium (NAPS), 2019 North American. :1-6 Oct, 2019
- Subject
- Power, Energy and Industry Applications
Automatic generation control
Frequency control
Power grids
Hydroelectric power generation
Oscillators
Power transmission lines
Regulation
Battery Energy Storage System (BEES)
Automatic Generation Control (AGC)
Ultra-Low Frequency Oscillation (ULFO)
Yunnan Power Grid
- Language
Many problems related to power system frequency have occurred in Yunnan Province ─a province in southwestern China with high proportion of hydro-turbine generators. Yunnan Power Grid is a typical direct-current (DC) sending grid and the installed capacity of hydro-generators has accounted for more than 70% of the total capacity after asynchronous interconnection between Yunnan Power Grid and China Southern Power Grid in 2016. But the high hydropower proportion of Yunnan Power Grid makes ultra-low frequency oscillation (ULFO) more prone to occur. Battery Energy Storage System (BESS) has broad application prospects in frequency regulation. Aiming at the ULFO problem caused by AGC daily operation, a coordinated AGC strategy based on BESS is proposed. It is able to eliminate ULFO caused by AGC action by ramping the AGC signal assigned to the units and self-adaptive action of BESS with a small energy storage capacity once the system is judged to be at risk of oscillation. The effectiveness of the proposed method is verified using real-world data from Yunnan Power Grid in China based on MATLAB\SINMULINK.