Abstract
AbstractIn this study, we investigate two kinds of control modes of battery energy storage systems (BESSs) to improve the short‐term frequency stability after a sudden loss of generation. One is a current control mode that directly controls current output, and the other is a voltage control mode that controls the frequency of the voltage output. The methods are verified by numerical simulation in a multi‐machine power system model considering transmission network. Numerical examples show that the voltage control mode is more effective than the current control mode for suppressing frequency drop and the rate of change of frequency (RoCoF) on condition that RoCoF data is unavailable for the control of the BESSs. It is also shown that the use of RoCoF data makes the current control mode effective for the alleviation of frequency drop and RoCoF as well as the voltage control mode.
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