Expansion installation and installation for obtaining electrical energy from heat

[0193]The fifth exemplary embodiment operates such that—as described in conjunction with the first exemplary embodiment—the generator 34 can be connected up by the power switch 206 if it delivers AC voltage at a frequency corresponding to the grid frequency of the grid 210.

[0194]In addition to connecting the generator 34 up to the grid 210 by means of the power switch 206, it is also possible for the connection switch 260 to connect the capacitor set 242 to the stator windings 254, 256 and 258 in parallel, wherein the capacitor set 242, with its capacitors 244, 246 and 248, serves to make an adaptation to the output as regards reactive and active power.

[0195]In this case, the controller 200′ closes the connection switch 260 if the power switch 206 is likewise closed and so the generator 34 outputs electrical energy to the grid 210. However, if the power switch 206 is opened the connection switch 260 initially continues to remain closed.

[0196]In addition, the resistor connection switch