Dynamic operation of an a.c. network analyser

Methods are described for representing synchronous machines, by means of which an a.c. network analyser can be constructed to solve both steady-state and transient power-system problems automatically, without the need for tedious step-by-step processes. An existing a.c. network analyser may readily be converted to dynamic operation by modification of the generator units only, as herein lies the only radical alteration in representation proposed. Choice of time scale for the study of electro-mechanical transients is arbitrary. However, advantages are indicated for a time scale of the order of 1 min on the analyser corresponding to 1 sec on the actual power system. Results of tests (employing a.c. network analyser units) are included, and possible improvements are discussed.