scholarly journals Two-Stage Battery Energy Storage System (BESS) in AC Microgrids with Balanced State-of-Charge and Guaranteed Small-Signal Stability

Energies ◽  
2018 ◽  
Vol 11 (2) ◽  
pp. 322 ◽  
Author(s):  
Bing Xie ◽  
Yiqi Liu ◽  
Yanchao Ji ◽  
Jianze Wang
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
State Of Charge ◽  
Small Signal ◽  
Small Signal Stability ◽  
Battery Energy Storage System ◽  
Battery Energy Storage ◽  
Signal Stability ◽  
Battery Energy

scholarly journals Battery Energy Storage System for Aggregated Inertia-Droop Control and a Novel Frequency Dependent State-of-Charge Recovery

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2003 ◽  
Author(s):  
Ujjwal Datta ◽  
Akhtar Kalam ◽  
Juan Shi
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
State Of Charge ◽  
Battery Energy Storage System ◽  
Frequency Dependent ◽  
Battery Energy Storage ◽  
Battery Energy ◽  
Dependent State

To deal with the technical challenges of renewable energy penetration, this paper focuses on improving the grid voltage and frequency responses in a hybrid renewable energy source integrated power system following load and generation contingency events. A consolidated methodology is proposed to employ a battery energy storage system (BESS) to contribute to voltage regulation through droop-type control and frequency regulation by assimilated inertia emulation (IE) and droop-type control. In addition, a novel frequency-dependent state-of-charge (SOC) recovery (FDSR) is presented to regulate BESS power consumption within the FDSR constraints and recharge the battery during idle periods whenever needed. The efficacy of the proposed BESS controller is demonstrated in an IEEE-9 bus system with a 22.5% photovoltaics (PV) and wind penetration level. The simulation results obtained manifest the satisfactory performance of the proposed controller in regulating simultaneous voltage and frequency in terms of lower rate of change of frequency and better frequency nadir. Furthermore, the proposed FDSR demonstrates its superiority at the time of SOC recovery compared to the conventional approach.

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