Chinese power transformer manufacturer TBEA introduced a grid-forming string power conversion system (PCS) for utility-scale storage, basic renewable energy projects and weak grid applications.
The TE435/392K-HV-BL high power converter focuses on improving power density and grid support. According to TBEA, the fully integrated liquid cooling design increases volumetric power density by 78% and gravimetric power density by 32% compared to the previous generation, reducing the footprint of energy storage installations by approximately 10%.
The PCS is designed to support a wide range of large format battery cells, including capacities from 500 Ah to over 1,000 Ah from multiple vendors, as well as cluster-based configurations from 314 Ah. This aligns with the industry’s ongoing shift toward larger battery cells in utility-scale storage, the company said.
The ability to form grids is an important feature. Based on the company’s high-speed control platform TE-PowerHUB 3.0, the system can switch between net following and net forming modes within milliseconds. It is designed to operate within a short circuit ratio (SCR) range of 1 to 40, allowing deployment in both strong and weak networks.
According to TBEA, the PCS can provide inertial response, fast frequency control, reactive power and voltage support, and black start capabilities. The company is positioning the system not only as a bidirectional inverter for battery charging and discharging, but also as network support.
Key specifications include a rated power of 435 kW/392 kW, IP66+C5-M protection rating, an operating temperature range of -40 C to 70 C and an altitude capability of up to 5,000 meters without derating. The conversion efficiency is listed at 99%.
TBEA identified four primary application segments: large standalone and shared storage projects in China, storage combined with large renewable energy bases, overseas grid-forming markets with high renewable energy penetration, and projects in deserts, high altitudes and other harsh environments.
Unlike conventional PCS systems, which mainly inject power into the grid and rely on existing grid conditions, grid-forming PCS is designed to emulate the behavior of synchronous generators. This includes providing virtual inertia and damping, which can help stabilize networks with a high share of renewable generation. As a result, network-forming systems are increasingly suitable for applications with weak networks and high renewables, where maintaining system stability becomes a crucial requirement.
This content is copyrighted and may not be reused. If you would like to collaborate with us and reuse some of our content, please contact: editors@pv-magazine.com.
