System and method for damping of torsional oscillations in large inertial energy storage systems
AssigneeRaytheon Company
InventorStephen Kuznetsov
Life of this patent
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Abstract
An energy storage system includes a power source configured to generate power. The energy storage system also includes an induction machine coupled to an inertial flywheel, the induction machine configured to receive electrical energy from the power source, store the energy in the flywheel, and deliver a first portion of the energy to a first pulsed load. The energy storage system further includes a damping network configured to receive and absorb a second portion of the energy at a controlled rate to regulate torsional oscillations in a rotary motion of the flywheel caused by load swings or pulsations of the first pulsed load.
Claims20
A rotating energy storage system comprising:
- a power source configured to generate power;
- an induction machine coupled to an inertial flywheel, the induction machine configured to receive electrical energy from the power source, store the energy in the flywheel, and deliver a first portion of the energy to a first pulsed load;
- and
- a damping network configured to receive and absorb a second portion of the energy at a controlled rate to regulate torsional oscillations in a rotary motion of the flywheel caused by load swings or pulsations of the first pulsed load.
The energy storage system of claim 19, wherein the control system comprises:
- a load controller configured to switch pulsed loads responsive to both real and reactive power output of the triply-fed induction machine;
- and
- a torsional oscillation damping controller configured to receive input signals of shaft speed, flywheel torque, and line or load power and commands gating and a current level of the damping network, the torsional oscillation damping controller configured to modulate both real and reactive power draw or regeneration at a line input of the triply-fed induction machine to dampen or suppress oscillations in shaft speed or torque.
A rotating energy storage system comprising:
- a power source configured to generate AC power;
- a triply-fed induction machine coupled to an inertial flywheel and comprising multiple stator ports and at least one rotor port, the triply-fed induction machine configured to receive energy from the power source, store the energy in the flywheel, and deliver a first portion of the energy to a first pulsed load;
- and
- a damping network configured to receive a second portion of the energy at a torsional damping voltage to regulate oscillations in a rotation speed of the flywheel caused by load swings or pulsations of the first pulsed load.
Dependencies are inferred from the claim text.