GE’s Power Conversion business was selected by China Machinery International Engineering Design & Research Institute (CMIE) to provide the 50 MVA VFD systems for a high power motor test bench for various types of motors in the range of 3–40MW with highly sophisticated testing configurations and features. The motor test bench has been successfully applied to test 18MW motors supplied by Shanghai Electric Machinery Co. (SEMC) for the West-East Gas Pipeline (WEPP) project, one of the largest infrastructure projects in China transporting natural gas fuel from Xinjiang to the Yangtze River Delta.
The motor test bench can be viewed as a ‘universal’ test bench due to the wide power range (3–40MW) of motors it can test for various types and a diverse range of configurations and operation modes. The test bench delivered by GE is packed full of technology innovations. The MV7tst IGCT VFD system delivered for the motor test bench contains two high-density 27-MVA VFD line-ups. Each VFD line-up provides 9-level (line-to-line) high power quality output with GE patented modulation and control strategy that takes full advantage of power processing capability of power semiconductors in all operating conditions. The two VFD line-ups can be used for dual machine pump-back test configuration, or can be paralleled to test single high power motor load.
