How does a power decoupling method work?

To address this issue, this paper introduces a power decoupling method. This method utilizes a bidirectional buck–boost converter, connected in parallel to the DC link, to divert SRP to a small capacitor within the single-phase grid-connected PV inverter, eliminating the need for electrolytic capacitors.

Which metric is best for power decoupling?

The count of the active components in the proposed circuit aligns closely with the other structures with voltage boosting capability. Meanwhile, the proposed circuit has the best μ F × kV/kW metric, which characterizes the performance of power decoupling.

How does MPPT control affect the output power of a PV module?

In the meantime, the output power of the PV module rapidly increases from 800 to 1000 W by the MPPT control. In the decoupling stage control, the decoupling capacitor voltage reference vCs_ref is changed correspondingly. The average voltage and ripple of vCs increase since the decoupling capacitor buffers more SRP.

What is active power decoupling algorithm based on input current ripple control?

Therefore, an active power decoupling algorithm based on input current ripple control is proposed in this paper. By the proposed method, the dc and ac power is controlled directly, so that the accurate active power decoupling can be realized with strong robustness in parameter drifting.

What does k mean in a decoupling capacitor?

The higher the value of k, the more unused redundant energy in the system. The capacitor voltage and the current with k = 1, k = 2, k = 3, and k = 5 are illustrated in Fig. 4. The capacitance of the decoupling capacitor is selected as 30 μF, and the parameters of the filtering elements are listed in Table 1.

Do active power decoupling circuits reduce capacitance?

In recent years, there have been a lot of studies on using active power decoupling circuits to reduce the capacitance of capacitors, but most of them require complex mathematical derivations to generate accurate decoupling capacitors voltage references or to obtain accurate system predictive models, which are weakly robust to parameter drifting.