By introducing a six-phase permanent magnet synchronous motor into FESS, the system could output higher power under the condition of low voltage and the noise and vibration of the motor are optimized during operation. Most importantly, the stability of the FESS is guaranteed in actual operation. 1. Introduction
The results show that the proposed control strategy is reasonable and effective. By introducing a six-phase permanent magnet synchronous motor into FESS, the system could output higher power under the condition of low voltage and the noise and vibration of the motor are optimized during operation.
The six-phase PMSM used in the system comprises two sets of three-phase symmetrical windings connected via a Y-shaped connection; the two sets of windings are separated by a 30° electrical angle in space. Assuming the six-phase PMSM is an ideal motor, the following assumptions are satisfied ( Dhulipati et al., 2019, Che et al., 2013 ):
There are currently few examples of using a six-phase PMSM as flywheel rotor on FESS. In this work, a FESS based on a six-phase PMSM is modeled and experimental tests are performed on the drive motor. A control strategy of the FESS based on a six-phase PMSM is proposed.
To enhance the frequency regulation capability of the FESS, some frequency regulation control strategies for wind-power systems with a flywheel energy storage unit have been proposed ( Peralta et al., 2018, Jia et al., 2022, Yulong et al., 2022, Yao et al., 2017 ).
The feasibility of using the FESS based on a six-phase PMSM for the practical application of frequency modulation of wind power was validated by simulation results, which simultaneously validated the practical significance of FESS as a new form of energy storage in new energy generation.