Conceptual design of the KSTAR Motor Generator

• Published in: Fusion engineering and design 2012-09, Vol.87 (9), p.1576-1582
• Main Authors: Kim, Chang-Hwan, Kong, Jong-Dea, Eom, Dae-Young, Joung, Nam-Young, Lee, Woo-Jin, Kim, Yang-Soo, Kwon, Myeun, Han, Chul-Woo, Lee, Sel-Ki, Parker, F.J., Hopkinson, D., Le Flem, G.D.
• Format: Article
• Language: English
• Subjects: Design engineering; Electric power generation; Electric power systems; Energy storage; Flywheel; Generators; KSTAR; Motor Generator; Motors; Power supplies; Power system; Superconductivity; Tokamak devices
• ISSN: 0920-3796; 1873-7196
• DOI: 10.1016/j.fusengdes.2012.04.020

► The design of the MG which is required to allow the PF MPS to operate at its full power rating has been completed. ► This system will increase the supply capability to the MPS to 200MVA, 1.6GJ and will supply reactive power to the MPS. ► A VVVF of 12MW will control the MG and will supply additional active power to the PF MPS in parallel with the MG. ► The MG will be installed in August 2012. ► The dummy coil testing will commence in December 2012 with superconducting coil testing scheduled for 2013. The Korean Superconducting Tokamak Advanced Research (KSTAR) superconducting magnet power supply is composed of a Poloidal Field Magnet Power Supply (PF MPS) and a Toroidal Field Magnet Power Supply (TF MPS). When the PF MPS is operated, it requires a large amount of power instantaneously from the KSTAR electric power system. To achieve the KSTAR operational goal, with a long pulse scenario, a peak power of 200MVA is required and the total power demand for the KSTAR system can exceed 200MVA. The available grid power is only 100MVA at the KSTAR site. Increasing the available grid power was uneconomical and inefficient which is why NFRI are installing a Motor Generator (MG). National Fusion Research Institute (NFRI) has made a contract with Vitzrotech and Converteam to design, manufacture and install the MG. Converteam has designed the electromagnetic and mechanical specification of the MG and Variable Voltage Variable Frequency (VVVF) converter. In this paper we discuss the conceptual design, including energy saving and electrical capacity of the MG system and the performance of the MG to satisfy the KSTAR 300s operation scenario. In addition, the manufacturing and installation plan for the KSTAR MG is discussed.