| Abstract: | This paper has shown the nature of the oscillatory phenomena involved in the parallel operation of A.C. generators driven by governor-controlled prime movers to be either stable or unstable, depending on the magnitude of the various electrical and mechanical quantities in the system. Further, such systems are non-unilateral coupled systems, and thus classify themselves as systems capable of self-induced vibration, i.e. systems which, when once displaced from equilibrium, will oscillate with increasing amplitude. An analogous electric circuit, which permits of easy experimental solution of the more cumbersome actual case, was disclosed, involving vacuum tubes—no analogue being possible with ordinary inductance, capacity, or resistance coupling, because these latter always form unilateral systems, and never display instability. Further investigations concerning these phenomena in allied circumstances will form the basis for future publication. |
