Dual feedback control energy storage

What is a dual-feedback damping strategy?

In a different approach, a dual-feedback damping strategy was proposed in and , where output power and angular frequency were fed back through a first-order inertia link to correct power deviation. However, this method increased system order and introduced numerous parameters, complicating the overall design.

What is a grid-connected energy storage system?

The energy storage grid-connected system utilizing the TVSG control strategy, as illustrated in Fig. 1, is divided into circuit topology and control structure . The circuit topology comprises an equivalent DC power source, a grid-connected inverter, an LC filter, line impedance, and an equivalent grid.

Does a grid-forming energy storage system respond quickly to changes?

It proposes a damping strategy based on bidirectional proportional adjustment, which ensures that the grid-forming energy storage system can respond quickly and stably to changes in active power reference and grid frequency. Furthermore, the research findings and contributions of this paper are summarized as follows:

Are frequency feedback controller and power feedforward compensator proportional?

As shown in Fig. 4 (a), the frequency feedback controller and the power feedforward compensator are proportional elements with a coefficient of Hf.

Why does energy storage have a dynamic oscillation and overshoot?

As a result, when disturbances occur in the power grid frequency and the reference value of active power, there is a tendency for the output power Pe of the grid-forming energy storage to exhibit dynamic oscillation and overshoot, which is not conducive to the rapid and stable tracking of power.

What are dynamic response characteristics of grid-forming energy storage bpdc-VSG?

Dynamic response characteristics of a Grid-Forming Energy Storage BPDC-VSG. (a) Variation of the output power Pe response curve with Hf under a step disturbance in the active power reference value. (b) Variation of the output frequency f response curve with Hf under a step disturbance in grid frequency.