The project utilizes the COENG HD8000 series medium-voltage three-level high-power inverter, applied to the left coiler (8 MVA), main mill (10 MVA), and right coiler (8 MVA) of a single-frame 20-roll reversible rolling mill. Since the project commenced production in 2023, it has been operating stably and reliably, demonstrating excellent control performance and high control accuracy, with no abnormal faults. It fully meets the control requirements of the cold continuous rolling process. Since its commissioning, the customer's production efficiency has significantly improved, receiving unanimous praise from the client.