The power characteristic results according to the superconducting magnet coil load test of the motor generator system

When the poloidal field (PF) magnet power supplies (MPS) of 11 units are operated, max power of 200 MVA is required to achieve long pulse operation of Korea Superconducting Tokamak Advanced Research (KSTAR). Motor Generator (MG) system was installed to resolve power shortage because the available grid power is only 100 MVA at the National Fusion Research Institute (NFRI) site. MG system is composed of mechanical devices (stator, rotor, bearings, etc.), power control devices (VVVF, exciter), power facilities (transformers, switchboard, UPS, filter, dynamic brake, etc.), utilities (cooling water pump, heat exchangers, cooling fans, oil circulation pump, mechanical brake, etc.) and control system. MG system supplies power to the PF MPS of 11 units. And we configure the Reactive Power Compensator (RPC) & Harmonic Filter (HF) system to stabilize the MG power system. After installing the MG system, individual tests and dummy coil tests were conducted to determine the safety and performance of MG system. And we completed the commissioning of the MG system by carrying out the superconducting magnet coil load test for 2014 KSTAR experiment. MG system was operated up to 150 MVA of PF MPS with RPC & HF system. And the maximum operating duration was about 100 seconds. In this paper, we discuss about the power characteristic results of the MG system according to the superconducting magnet coil load test.