How to Select Power Converters for High-Performance BESS Applications?

In this video, we will introduce the importance and operation of solar energy storage systems (BESS) , as well as suitable converters must meet requirements.

"Energy storage" refers to a convenient technology that saves excess power for later use, enhancing grid stability and saving energy.

Taking a solar battery energy storage system as an example, solar panels generate renewable energy to power loads, while excess electricity is stored in the battery. When solar energy is unavailable, the system intelligently allocates stored energy to meet demand.

This diagram shows a typical PV power generation system. The high-voltage DC bus utilizes a 150V-1500V input DC-DC converter, aiming to simplify power design and adapt to different scales PV output, and the power range from 100 watts to 1000 watts. Then, point-of-load converters supply the precise DC voltages needed for various modules, ensuring efficient operation.

For gate driver power supply, isolation capacitance Cio represents a key EMI propagation

path to be controlled in order to avoid high-frequency noise coupling, leakage current, and stability. By optimizing transformer design, such as reducing the winding surface area and increasing the winding distance, helps reduce these effects.

Considering the energy storage market‘s trend toward high performance and energy-saving, the non-isolated power converters have the advantage of miniaturization, support a wide input voltage range, and achieve efficiency up to 95%, meeting key market demands.

Since silicon carbide (SiC) shows rapid voltage transients during switching, it presents design challenges. The gate driver power supply adopts a reinforced insulation design with isolation capacitance below 5pF, effectively suppressing common-mode noise current caused by fast voltage transients.

These power converters is designed to achieve high insulation capability, low isolation capacitance, and high efficiency. Its purpose is to help simplify the design of energy storage systems. Also, we provide full technical support and after-sales service, giving customers peace of mind when using our products.

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