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Open AccessArticle

Adaptive Control Strategy of Energy Storage System Participating in Primary Frequency Regulation

1
State Grid Fujian Economic Research Institute, Fuzhou 350000, China
2
College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China
*
Author to whom correspondence should be addressed.
Processes 2020, 8(6), 687; https://doi.org/10.3390/pr8060687
Received: 20 March 2020 / Revised: 20 April 2020 / Accepted: 24 April 2020 / Published: 12 June 2020
(This article belongs to the Special Issue Energy Storage System: Integration, Power Quality, and Operation)
In order to solve the capacity shortage problem in power system frequency regulation caused by large-scale integration of renewable energy, the battery energy storage-assisted frequency regulation is introduced. In this paper, an adaptive control strategy for primary frequency regulation of the energy storage system (ESS) was proposed. The control strategy combined virtual droop control, virtual inertial control, and virtual negative inertial control. The virtual inertial control was used to reduce the frequency change rate, and the virtual droop control was used to reduce the steady-state frequency deviation. The virtual droop control and the virtual inertia control were adopted in the frequency deterioration stage to slow down the frequency drop. While in the frequency recovery stage, the virtual negative inertia control worked together with the virtual droop control to accelerate the frequency recovery. Besides, the coefficients of the control methods were related to the state of charge (SOC) of ESS to avoid over-charging and over-discharging of the battery. Finally, a simulation model was built in MATLAB/SIMULINK, and case studies were conducted to verify the proposed control strategy. Results showed that the proposed method could meet the demand for frequency regulation and was beneficial to the cycle life of ESS. View Full-Text
Keywords: energy storage; primary frequency regulation; drop control; virtual inertial control energy storage; primary frequency regulation; drop control; virtual inertial control
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MDPI and ACS Style

Fang, C.; Tang, Y.; Ye, R.; Lin, Z.; Zhu, Z.; Wen, B.; Ye, C. Adaptive Control Strategy of Energy Storage System Participating in Primary Frequency Regulation. Processes 2020, 8, 687.

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