Grid-Forming Energy Storage Converter Test Outline

This document provides a comprehensive test outline for grid-forming energy storage converters, detailing 15 test items including low/high voltage ride through, continuous fault ride through, voltage adaptability, active/reactive power control, fast frequency regulation, frequency adaptability, inertia support, phase jump adaptability, damping control, grid-forming mode online switching, multi-machine parallel operation, overload capability, and black start. Tests are conducted under strong and weak grid conditions (SCR≥10 and SCR≤2) with specified X/R ratios. Evaluation criteria reference national standards GB/T 34120-2017 and GB/T 36547-2018. The equipment must simulate ideal voltage source characteristics, consider overcurrent and overload factors (recommended overload factor ≥3), and ensure grid-connected performance not lower than existing grid-following equipment. Test conditions include various load levels, charging/discharging states, and fault depths. The outline emphasizes stable operation, harmonic limits, and reactive power compensation strategies during faults.