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Transformers are critical components in power distribution networks, responsible for adjusting voltage levels to ensure efficient electricity transmission. However, as demand for electricity grows, transformers often face the challenge of operating near or beyond their rated capacities. This can lead to overheating, reduced efficiency, and a shortened lifespan. Traditional solutions, such as installing new transformers, are costly and time-consuming. Therefore, enhancing the dynamic capacity of existing transformers is essential for meeting increasing demand without compromising the reliability or longevity of the equipment.
Under a dynamic capacity enhancement strategy, the Battery Energy Storage System (BESS) charges when the transformer has surplus capacity during low-load conditions, which often corresponds to lower electricity prices. Conversely, when the battery discharges to achieve dynamic capacity enhancement, it typically occurs during high-load conditions with higher electricity prices. Therefore, the BESS dynamic capacity enhancement strategy can also passively capitalize on peak-valley price arbitrage, thereby generating additional revenue.
FFD Power’s Cabinet BESS delivers a nominal output of 60 kW / 100 kW for both charging and discharging power. This scalable solution, which can range from 60 kW to 3 MW, is perfectly suited for small to medium-sized businesses and industrial users implementing a dynamic capacity enhancement strategy. Each battery cluster is connected to its own independent Power Conversion System (PCS), ensuring that each cabinet operates autonomously. In the event of a fault in one cabinet, the other cabinets continue to operate smoothly, maintaining uninterrupted performance and ensuring system reliability.
FFD Power’s Containerized BESS offers a nominal output power of 1250 kW / 1725 kW. This scalable solution, with output power extending from 1.25 MW to 51.75 MW, is perfect for medium to large-scale dynamic capacity enhancement. Each container is equipped with advanced thermal management and fire suppression systems, ensuring safe and reliable operation under various environmental conditions. Additionally, the modular design allows for easy transportation and installation, making it an ideal choice for rapidly deploying energy storage solutions across multiple sites.
FFD Power’s system can connect up to 30 cabinets in parallel on the AC side, with each cabinet featuring a Power Conversion System (PCS) capable of delivering up to 100 kW of continuous charging and discharging power. The BESS is AC-coupled with the transformer, ensuring seamless integration. A central EMS communicates with all cabinet EMS units and the meter at the connection point, coordinating the charging and discharging power and timing. The EMS continuously monitors the grid input from the meter and compares it to the transformer’s capacity, charging the batteries when the input is below the transformer’s capacity and discharging when the input exceeds the transformer’s capacity.
FFD Power’s system can connect up to 30 containerized BESS units in parallel on the AC side, following transformers that convert the 690Vac output from the 1725 kVA PCS to the rated connection point voltage. The BESS is seamlessly integrated with the transformer on the AC side.
A central EMS communicates with all container EMS units and the meter at the connection point, coordinating the charging and discharging power and timing. The EMS continuously monitors the grid input from the meter and compares it to the transformer’s capacity, charging the batteries when the input is below the transformer’s capacity and discharging when the input exceeds the transformer’s capacity.
100kWp Photovoltaic System with 20kW Transformer for a 120kW Charge Station Project, Mallorca, Spain.
The transformer in this system has a capacity of only 20kW, while the charge station’s maximum design capacity is 120kW. Although the photovoltaic system has a peak capacity of 100kWp, its output is highly variable, leading to a significant risk of overloading the transformer. This could severely impact the safety and lifespan of the transformer and associated equipment.
To address these challenges, integrate an FFD POWER 100kW/215kWh Battery Energy Storage System (BESS) on the AC side. The BESS will store excess energy generated during peak sunlight periods and charge from the grid when the transformer has spare capacity, as detected by the EMS monitoring grid input at levels below the transformer’s 20kW rating. If the PV output is insufficient or the charge station load exceeds capacity, leading to transformer overload, the EMS will detect grid input exceeding the transformer’s rating. The BESS will then discharge, reducing the transformer load to within its safe operating limit of 20kW, effectively enhancing the transformer’s capacity and ensuring reliable operation.
