SAO PAULO, July 30, 2025 — Sungrow, a globally recognized provider of PV inverters and energy storage systems, has announced with pride that all dynamic models for its inverters distributed in Brazil have received official validation from Brazil’s National Electric System Operator (ONS). This achievement signifies that Sungrow’s offerings adhere to rigorous compliance requirements and precisely illustrate their dynamic performance during electromechanical and electromagnetic transient events, underscoring the company’s persistent dedication to technical superiority and its significant role in advancing the modernization and dependability of the country’s power grid.
Addressing Challenges Brought to Light by Grid Disruptions
A widespread power outage struck Brazil in August 2023, emphasizing the critical need for precise dynamic modeling in wind and solar energy facilities. This incident highlighted concerns regarding the reliability of inverter-based resources’ performance during grid disruptions, especially concerning reactive power support and low-voltage ride-through (LVRT) capabilities.
Consequently, in October 2023, the ONS issued Report (RAP 0012/2023), initiating a systematic program to assess and validate models of inverters and power plant controllers (PPCs), with the goal of improving the accuracy and resilience of power system simulations.
Rigorous Validation Procedures for Grid Adherence
Working in close collaboration with ONS, Sungrow’s inverters were subjected to comprehensive simulation and testing. This involved using PSCAD for electromagnetic transients and ANATEM for RMS-based electromechanical transients, both vital for examining dynamic occurrences such as switching, faults, and power electronics interactions. The entire process was organized into two primary phases, each presenting notable complexities.
- Inverter Level 1 (L1): Sungrow performed validation of its PSCAD model utilizing a semi-physical controller, thereby confirming the coherence between simulated outcomes and real hardware operation.
- Inverter Level 2 (L2): Building upon the validated PSCAD model, an ANATEM model was subsequently developed and cross-referenced to verify harmony across both platforms.
Sungrow profoundly appreciates and values the operator’s involvement throughout this process, consistently demonstrating a high degree of technical expertise and a cooperative approach to guarantee the resilience of the Brazilian National Interconnected System (SIN).
The company committed substantial resources to ensure its inverters successfully satisfied all necessary modeling verification criteria. It also established a committed local team, engaged global R&D specialists, and enlisted expert consultants to oversee the process from commencement to completion. Consequently, Sungrow obtained official approval for its entire range of inverters sold, encompassing central, string, and modular models.
“This accomplishment underscores our dedication to providing high-performance, grid-compliant solutions that enhance the stability and update Brazil’s national electricity infrastructure,” stated Ada Li, Vice President of Sungrow Americas.
Regarding Sungrow
Sungrow, a leading global innovator in renewable energy technology, has been at the forefront of sustainable power solutions for more than 28 years. By December 2024, Sungrow had deployed 740 GW of power electronic converters globally. The company holds the distinction of being the world’s most bankable PV inverter and energy storage firm (according to BloombergNEF). Its groundbreaking advancements energize clean energy initiatives worldwide, backed by a network of 520 service centers that ensure outstanding customer satisfaction. Sungrow is dedicated to facilitating a sustainable future through advanced technology and unmatched service. For additional details, please visit: .
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