Sungrow, a global leader in photovoltaic inverters and energy storage systems, has announced that all dynamic models of its inverters sold in Brazil have received official approval from the National Electric System Operator (ONS). This milestone confirms that Sungrow’s inverter models meet Brazil’s stringent compliance standards and accurately reflect their behavior during electromechanical and electromagnetic transients. The approval emphasizes the company’s dedication to technical excellence and its proactive role in enhancing the reliability and modernization of Brazil’s electricity grid.
The significance of accurate dynamic modeling drew considerable attention following a large-scale blackout in Brazil in August 2023. This event underscored the urgent need for reliable performance of inverter-based resources, particularly in situations involving reactive power support and low-voltage ride-through (LVRT) capabilities. In response, the ONS released Report RAP 0012/2023 in October 2023, initiating a structured effort to assess and verify the models of inverters and power plant controllers (PPCs) to enhance the accuracy and robustness of power system simulations.
Ada Li, Vice President of Sungrow Americas, stated, “This achievement reinforces our commitment to delivering high-performance, grid-compliant solutions that contribute to the stability and modernization of Brazil’s national power system.”
Sungrow’s inverters underwent a thorough validation process in close collaboration with ONS, which consisted of two key stages. The first stage, known as Level 1 (L1), involved validating the electromagnetic transient model using PSCAD software and a semi-physical controller to ensure a close alignment between simulation results and actual hardware performance.
In the second stage, Level 2 (L2), the company created a model using ANATEM software to simulate electromechanical transients, which was cross-verified with the PSCAD model to ensure consistency across platforms. These simulations addressed critical dynamic events such as switching operations, faults, and interactions involving power electronics.
To ensure success throughout this intricate process, Sungrow allocated significant resources, including a local Brazilian team, global research and development experts, and specialized consultants. The approval encompasses the entire range of Sungrow’s inverter products, including central, string, and modular inverters. With this achievement, Sungrow reaffirms its commitment to providing high-performance, grid-compliant renewable energy solutions while supporting the stability and sustainability of Brazil’s National Interconnected System (SIN).
Source: Sungrow
