Mersen has developed new overcurrent protection technologies for renewable energy storage systems with their ABAT and GBAT series fuses. These series of fuses include product lines designed for applications from 1000V to 1500VDC.

In 2015, 196 countries agreed to the Paris Climate Agreement to limit global warming to 2 ° C. Renewable energy sources must replace fossil energy sources in order to achieve this goal. Battery or energy storage systems (ESS) store periodic energy produced from renewable sources, such as solar or wind generators, and then distribute it back into the grid.

Change the game for Smart Grid

Energy storage systems provide utilities with the critical flexibility to integrate renewable energy into the modern smart grid. With regard to changes in battery technology worldwide, ESS integrators continue to design systems with higher power levels. Electricity storage systems often have a capacity of several hundred MWh. The global energy storage market continues to be resilient to the effects of COVID-19 and restrictions on the supply of lithium-ion batteries. It will enter a long period of growth, with annual installations reaching more than 30 GW by 2030 – 250% more than 2021 levels – according to the latest report from the Clean Energy Technology Service at IHS Markit. This places extreme demands on protection systems, not to mention challenging load profiles with ever-changing charge and discharge cycles.

Figure 1: Mersen’s new ABAT and GBAT fuses are ideal for renewable energy and photovoltaic applications

“As a result of climate change, we will need more and more storage systems to store all the renewable energy generated. In addition, a standard is needed to protect these new electrical systems, ”explains Mersen expert Dr. Philip Russell.

To protect these power storage systems, Mersen Electrical Power introduces the ABAT and GBAT series of fuses. These products complement Mersen’s portfolio of DC overcurrent protection from products designed to meet the different needs of customers and applications of energy storage systems. All products meet the new additional requirement of the IEC 60269-7 standard for fuses for protection of batteries and accumulator systems.

ABAT15A is designed primarily for integrated suppliers that provide battery racks. The battery rack is a set of battery modules sequentially in one rack or a series of batteries controlled by Battery Management System (BMS). The fuse is installed to protect the battery and contactors from short circuits located inside the BMS. The rated current of the fuse varies from 100 to 500A.

Mersen ABAT fuses are designed for batteries and air conditioning systems and are suitable for short-circuit currents up to 250 kA - energy storage
Figure 2: Mersen ABAT fuses are designed for batteries and air conditioning systems and are suitable for short-circuit currents up to 250 kA

ABAT15C and ABAT15D are designed for system integrators and manufacturers of power conditioning systems (PCS). By choosing the number of parallel batteries in a system, system integrators can determine the input and output power according to the needs of their customers. The racks can be mounted in sections, which can then be mounted in a container. Multiple racks can also be mounted directly in a container. The PCS manufacturer provides the inverter needed to connect the entire battery system to the mains by converting the power supply from DC to AC. Depending on the system integrators, they may or may not provide both the full range of battery systems and PCS. Because multiple battery systems are installed, the output power is higher than that of the trunk, resulting in rated fuses of 500 to 1600A.

All ABAT fuses are tested with short-circuit currents up to 250 kA.

Energy storage solutions for small and large overcurrents

GBAT series fuses are designed for use in batteries and inverters. These fuses provide protection against both short circuit and overload, covering smaller overcurrents and constant fault currents up to 150 kA, at time constants (L / R) of 1 to 3 milliseconds.

Mersen GBAT fuses are designed for use in battery containers and inverters and cover smaller overcurrents and DC fault currents up to 150 kA
Figure 3: Mersen GBAT fuses are designed for use in battery containers and inverters and cover smaller overcurrents and DC fault currents up to 150 kA

GBAT fuses are available in two rated voltages: fuses for system voltages up to 1000 V DC in sizes NH1 and NH2 (up to 50 kA) and 1500 V DC fuses with sizes up to NH3XL (up to 150 kA). All GBAT fuses are available with either screw blades for direct mounting or ordinary blades.

Renewable energy applications

As a global expert in electricity, Mersen offers a wide portfolio of products for use in renewable energy applications. These include an extensive line of electrical protection equipment for photovoltaic solar systems.

https://www.powerelectronicsnews.com/protection-solutions-for-renewable-energy-storage-systems/

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