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Fault-tolerant operation control method and device for flywheel energy storage system based on twelve-phase motor

A flywheel energy storage and operation control technology, which is applied in the direction of motor generator control, AC motor control, and electromechanical transmission control, can solve the problems of complex switching process and system dynamic performance degradation, and achieve smooth fault-tolerant operation process and maintain front-to-back The effect of constant power

Active Publication Date: 2020-09-25
TSINGHUA UNIV
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Problems solved by technology

[0004] However, in the above disclosed multi-phase motor fault-tolerant control method, after the multi-phase motor fails, the phase currents of all remaining phases need to be controlled separately to achieve fault-tolerant operation control, and the switching process is complicated, and the dynamic performance of the system is reduced

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  • Fault-tolerant operation control method and device for flywheel energy storage system based on twelve-phase motor
  • Fault-tolerant operation control method and device for flywheel energy storage system based on twelve-phase motor
  • Fault-tolerant operation control method and device for flywheel energy storage system based on twelve-phase motor

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[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0048] Before introducing the fault-tolerant operation control method and device of the flywheel energy storage system based on the twelve-phase motor, a brief introduction to the flywheel energy storage system is given first.

[0049] The flywheel energy storage system includes a flywheel rotor, a twelve-phase permanent magnet synchronous motor and four three-phase converters. The twelve-phase windings of the motor are divided into four groups, which are respectively connected to the AC terminals of the four sets of converters, ...

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Abstract

The invention discloses a twelve-phase motor based fault tolerance operation control method and device of a flywheel energy storage system. The method comprises when a fault occurs in one phase of thetwelve-phase permanent magnet synchronous motor (PMSM), the fault phase is cut off, a residual winding in a three-phase winding corresponding to the fault phase is equivalent to a single-phase PMSM,and the three-phase winding of the phase without fault is equivalent to three three-phase PMSMs; a mathematic model of the one equivalent single-phase PMSM in a rest frame is established, and operation of the equivalent single-phase PMSM is controlled in an adaptive quasi-PR control method; and the weak magnetic current of the three three-phase PMSMs is controlled to generate a magnetic resistancetorque, the magnetic resistance torque compensates the power fluctuation and amplitude loss generated by operation of the equivalent single-phase PMSM, so that fault tolerance operation control is carried out on the flywheel energy storage system. The method can be used to ensure smooth switching from normal operation to fault tolerance operation, power is kept unchanged before and after switching, and the method is easy to realize.

Description

technical field [0001] The invention relates to the technical field of operational reliability of a flywheel energy storage system, in particular to a fault-tolerant operation control method for a flywheel energy storage system based on a twelve-phase motor. Background technique [0002] Flywheel energy storage technology has great application potential in the fields of power grid frequency regulation, power quality management, vehicle regenerative braking energy recovery, and UPS (Uninterruptible Power System / Uninterruptible Power Supply, uninterruptible power supply). The development goals of flywheel energy storage technology are to improve efficiency, reliability and realize high-power operation. Compared with three-phase motors, multi-phase motors can improve the operating efficiency of the system, and have phase redundancy characteristics, which facilitate the use of fault-tolerant control algorithms to ensure that the system can continue to operate at rated power afte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P21/05H02P27/12H02K7/02
CPCY02E60/16
Inventor 姜新建李汶灿吕静亮
Owner TSINGHUA UNIV
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