Design of dynamic and thermal stability test system for UHV switchgear based on 330kV grid power supply
To meet the low-voltage, high-current, and long-duration requirements of thermal and dynamic stability tests for UHV disconnectors and earthing switches, this paper proposes a two-stage step-down test system powered by a 330 kV grid. The system employs a 12.5 MVA transformer (330 kV/35 kV) and a 90 MVA short-time-rated...