would be unloaded when the load increases beyond the base load under normal operation the switch blocks are connecting the gas turbine 16 to pebb block or converter 70 and then to ac grid 100 at this time switch 152 is connecting the motor 14 to flywheel 18 to keep the flywheel spinning i e storing energy and ready for use when the generator 12 and turbine 16 is disconnected from the system by switches 40 42 46 the flywheel generator 14 is connected to feed the base load and the additional pulsed or peaking load when a pulsed or peaking load is completed switches 40 42 46 reconnect gas turbine 16 which is still operational even through having been disconnected from the system the switch 152 connecting flywheel 18 is the same as switches 40 42 46 and comprise dual pole transfer switches either for connecting the generator turbine generator to the ac grid 100 or for connecting the flywheel generator 14 18 to the grid 100 the pebb is used to control the electric machine coupled to the turbine such that it switches between functioning as a motor or a generator u201c on the fly u201d i e the direction of power flow determines if the electric machine is a motor or generator the pebb corresponds to the ac dc blocks forming converter 70 alternatively a separate active module could be used for motoring and a separate possible module used for generating in this case a contactor can be used to toggle which pebb is active.