Abstract
High power density energy storage permanent magnet (PM) motor is an important energy storage module in flywheel energy storage system for urban rail transit. To expand the application of the PM motor in the field of urban rail transit, a predictive power control (PPC) strategy for the N*3-phase PM energy storage motor is proposed in this paper. Firstly, the output characteristics of the N*3-phase PM energy storage motor are analyzed by using the finite element method, and the mathematical model of the N*3-phase PM energy storage motor is established. Then, the topological structure and operation principle of N*3-phase PM energy storage motor system is illustrated. Furthermore, the N*3-phase PM energy storage motor system driven by six parallel voltage source inverters (VSIs) is proposed to generate the required power. Finally, a novel predictive direct power control method is developed for the N*3-phase PM energy storage motor. The feasibility and effectively of the proposed PPC method are verified by experiment and simulation. Comprehensive simulation and experimental results both show that the proposed PPC method can obtain the lower torque/stator flux ripple, smaller values of THD of stator winding currents, and zero error tracking of stator winding flux.
Highlights
Urban public transport is the lifeblood of urban economic life and an important infrastructure related to national economy and social stability
PPCTaking algorithm is verified on the by this paper, the predictive power control (PPC) method of N*3-phase motor is verified using the tor as an example, the feasibility and effectively of proposed algorithm is verified on the RT-Lab platform
This paper started from analyzing the output characteristics of the N*3-phase permanent magnet (PM) energy storage motor drive, based on which the PPC method was developed to obtain the performance of lower torque ripple, smaller values of THD of stator winding currents under the charge state and discharge state
Summary
Urban public transport is the lifeblood of urban economic life and an important infrastructure related to national economy and social stability. Flywheel energy storage technology has the advantages of high power density, fast response speed and green environmental protection [3] It has unique advantages in stabilizing the traction grid voltage and improving the regenerative energy recovery of train braking. In the field of urban rail transit with higher and stricter reliability requirements, the novel N*3-phase PM energy storage motor with strong fault tolerance and high reliability has more advantages than the conventional three-phase PM motor. In [23], a predictive stator flux control algorithm was proposed for PM synchronous motor drives, which can obtain low torque ripple, low stator current harmonics, and excellent steady-state performance. In [25], a cascaded robust fault-tolerant predictive control strategy based on integral terminal sliding mode observer was presented for PM synchronous motor drives, which can obtain high performance speed loop and current loop. The predictive direct power control of novel N*3-phase PM energy storage motor in Section 4. inThe simulation and experimental results are results given in and 6, respectively
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