Storage system for storing energy useful in starting and regulating electrical systems

A storage system for storing energy useful in starting and regulating electrical systems, comprising

• an energy storage device comprising at least one coil spring housed in a casing and arranged in a rotating shaft to store mechanical energy when the rotating shaft rotates in a first load direction tensing the coil spring, and to release mechanical energy stored in the coil spring when the rotating shaft rotates in a second direction, opposite the first direction, in which the coil spring is unloaded;
• a loading device that delivers the mechanical energy generated by an electric motor to the energy storage device,
• a stored energy unloading device that transmits energy stored in the energy storage device to a power generator;
• and
• a controller connected to the loading device, to the stored energy unloading device and to the storage device, and to a control system:
• an electric machine capable of acting like an electric motor and an electric power generator and is controlled by power electronics;
• a braking and holding element connected to the rotating shaft and controlled by a locking control device to keep the coil spring alternately in a blocked situation in which the rotating shaft does not rotate or in a released situation in which the rotation of the rotating shaft in said first direction driven by the loading device tenses the coil spring to store mechanical energy, whereas the rotation of the rotating shaft in the second direction releases the mechanical energy stored in the coil spring;
• wherein
• the stored energy unloading device comprises a rotational movement transmission system, and a torque and speed variation system;
• wherein
• the transmission system is interconnected between said electric machine and the torque and speed variation system, and the torque and speed variation system is interconnected between the transmission system and the rotating shaft of the storage device;
• and wherein
• when supplied with electricity, the electric machine operates like an electric motor which tenses the coil spring, and when the coil spring releases mechanical energy, the electric machine operates like an electric generator;
• whereby
• the system absorbs or delivers energy by coupling to the electric machine which, controlled by means of the power electronics, converts the mechanical energy stored in the spring into electrical energy and vice versa to start electric motors or regulate electrical systems or networks.