Photovoltaic inverter destocking

Can a single-phase single-stage dual-Buck photovoltaic inverter reduce DC-link voltage Puls?

This paper proposes a single-phase single-stage dual-buck photovoltaic (PV) inverter with an active power decoupling (APD) strategy. Using this strategy, the dc-link voltage pulsating caused by a low-frequency power fluctuation in single-phase systems can be reduced without using a bulky dc-link storage.

How does a dual-Buck PV inverter work?

Fig. 2 represents the hardware configuration of the proposed dual-buck PV inverter with the APD circuit. In the dual-buck PV inverter, the switching leg, including Sn and Sp, operates at the grid frequency, while the other legs, including S1, D1, S2, and D2, run at a high switching frequency to achieve a low leakage current and high efficiency.

How much did energy storage inverters export in September 2023?

In September 2023, the domestic exports of energy storage inverters amounted to $650 million, marking a 33% year-on-year decrease and a 6% month-on-month decline. The number of PV and energy storage inverters exported in September stood at 3.91 million units, down by 23% compared to the previous year and 3% on a month-to-month basis.

How much do solar and energy storage inverters export?

The cumulative export amount of domestic solar and energy storage inverters reached $8.25 billion, marking a 39% year-on-year increase. - During the same period, the cumulative export volume of domestic solar and energy storage inverters was 40.92 million units, reflecting a 24% year-on-year increase.

How to improve performance of single-stage dual-Buck PV inverter?

The performance of single-stage dual-buck PV inverter can be improved by combining with the active power decoupling strategy. The active damping control assists to stabilize the control loop for the active power decoupling circuit. The active power decoupling can reduce the physical size of the dc-link storage.

How do static converters affect photovoltaic production systems?

The current distortion due to the use of static converters in photovoltaic production systems involves the consumption of reactive energy. For this, separate control of active and reactive powers using a proportional-integral controller is applied.