This method does not require any additional controller and the synchronous machine can be operated as a synchronous condenser to control the reactive power in distribution systems and/or operate as a motor or generator set. However, its compensation characteristics depend on zero-sequence impedance of...
Figure 8confirms that this method gives stable results, as it shows the change of the load angle of the pumped-storage hydro unit under three operation modes: synchronous condenser, pumping and generator, with different active and reactive power. The measurements shown inFigure 8were taken from ...