High speed digital computer simulation of the Virginia Smith DC convertor station

The Virginia Smith converter station is a back-to-back DC converter station located in Sidney, Nebraska. It connects with two AC power grids which operate asynchronously. The station is designed to transfer 200 MW of power either west to east or east to west. The nominal DC voltage is 50 kV and rated direct current is 4140 amps. The station has several special features required by the relative strengths of the two AC systems, electrical locations of generation relative to the station, possible network configurations, and system power transfer requirements. The authors describe the model of the converter station developed for the study of both relatively fast transients (10 to 20 Hz) and the slower electromechanical swings (1 Hz). Comparison of field test results and computer model results are given