What is the frequency coordinated control strategy of the wind-storage system?

In the frequency coordinated control strategy of the wind-storage system, the required inertia is jointly provided by the SG, wind turbine, and energy storage. Moreover, the function of primary frequency regulation is undertaken by the SG and energy storage devices.

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 control of energy storage?

The primary frequency regulation control of energy storage increases the active power to compensate for the shortfall in the SG's primary frequency regulation capability. As a result, Δ fst is reduced from −0.566 Hz to −0.491 Hz, meeting the requirement of system frequency safety.

What is energy storage adaptive coordinated control strategy?

The energy storage adaptive coordinated control strategy ground on VSG technology is applied in the power system. Modern computer technology are crucial for ensuring frequency stability of the power grid and improving system adaptability (Yao et al. 2023).

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.