How is the energy storage capacity configured based on frequency regulation demand?
In Section 3, the energy storage capacity is configured based on the system frequency regulation demand, and a wind-storage coordinated frequency regulation control strategy is proposed, which makes reasonable use of the frequency support potential of wind power and energy storage and ensures the dynamic stability of the system frequency.
What is the primary frequency regulation requirement of energy storage system?
First of all, energy storage needs to meet the frequency regulation needs of the system. With the frequency deviation constraint determined, the primary frequency regulation requirement of the system depends on the power disturbance.
Does energy storage participate in frequency regulation?
The energy storage participates in frequency regulation according to the system frequency regulation requirements, which can reduce the maximum value of frequency deviation to ±0.5 Hz and meet the safety constraints and effectively reduce the steady-state frequency deviation.
Can energy storage provide power support based on frequency deviation?
After activating the frequency regulation control of the energy storage system, as shown in Fig. 7(c1)- (c2), the energy storage can provide power support according to the system frequency deviation signal until the system frequency returns to the steady-state value.
Can wind power and energy storage participate in frequency regulation?
Currently, research on the control of wind power and energy storage to participate in frequency regulation and configuration of the energy storage capacity is at its nascent stage. Similar to wind generators, energy storage can be involved in system frequency regulation through additional differential-droop control.
What is the primary frequency regulation coefficient of energy storage?
Since the frequency deviation of the system should not exceed 0.5 Hz according to standards, the primary frequency regulation coefficient of energy storage, Kb can be in the range of 0 and 100. To maximize the power support from the energy storage when the power disturbance is large, the energy storage is supported by rated power, i.e., Kb = 100.
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