Analyzer interconnections for power swing curves

THE CALCULATION of power-system swing curves generally is performed by using one of several point-by-point techniques in conjunction with an a-c network analyzer. The technique is well known and while greatly simplified by use of the network analyzer is still laborious and time-consuming. At least one analogue for the automatic and continuous determination of swing curves has been devised and several have been proposed. This digest illustrates a method for direct determination of swing curves by interconnection of a network analyzer with a differential analyzer.¹