Control method for mechanical energy storage system

A control method and technology of mechanical energy storage, which are applied in the direction of single motor speed/torque control, electronic commutator, AC network load balancing, etc., can solve the problem of low robustness of the speed control accuracy system of the flywheel energy storage system, etc. Achieve the effect of improving speed control accuracy and improving stability

Active Publication Date: 2013-08-14
迪比(重庆)智能科技研究院有限公司 +1
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Problems solved by technology

[0015] The control methods designed for the three-phase permanent magnet synchronous flywheel drive motor in the prior art all need vector control, and the speed control accuracy and system robustness of the flywheel energy storage system are not high.

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  • Control method for mechanical energy storage system
  • Control method for mechanical energy storage system
  • Control method for mechanical energy storage system

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] A control method for a mechanical energy storage system, which takes the output power of the DC side of the flywheel energy storage system as the detection object, and designs a new type of neuron adaptive PID control on the basis of the traditional speed-current double closed-loop control system algorithm to control the flywheel drive motor, such as figure 1 , 2 shown. The speed-current double closed-loop control needs to design two controllers: an inner loop current controller and an outer loop speed controller. Wherein, the current controller adopts the traditional PID control algorithm, and the speed controller of the outer loop adopts the neuron self-adaptive PID control algorithm designed by the present invention.

[0039] In the figure, n * is the flywheel reference speed signal, its unit is r / min, it is related to t...

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Abstract

The invention discloses a control method for a mechanical energy storage system, which comprises the following steps that 1, one flywheel energy storage unit is connected in parallel with one wind driven generator, or a flywheel energy storage matrix is formed by the one flywheel energy storage unit and a plurality of other flywheel energy storage units; 2, a rotor position sensor acquires a rotating speed of a flywheel motor, and a current sensor acquires a current signal of a DC (Direct Current) bus; 3, a sampling value of a rotating speed error is calculated; 4, a neuron self-adaptive PID (Proportion Integration Differentiation) controller is used as a rotating speed controller, and an output control quantity of the neuron self-adaptive PID controller is calculated; 5, a current error signal of the DC bus is calculated; and 6, the current error signal is input into a current controller for controlling output of a PWM (Pulse-Width Modulation) wave, and PWM drives a bidirectional converter to control the flywheel motor to operate in an accelerated or decelerated manner. The control method is fundamentally different from other control methods designed for a three-phase permanent magnetic synchronous flywheel driving motor; vector control does not need to be carried out; and rotating speed control accuracy of the flywheel energy storage system and robustness of the system are greatly improved.

Description

technical field [0001] The invention relates to a flywheel control method of a wind farm, in particular to a control method for a mechanical energy storage system. Background technique [0002] The flywheel energy storage matrix system composed of multiple flywheel energy storage units can cooperate with renewable energy power systems such as wind power generation to smooth the active output power of the system and stabilize the output voltage of the system, thereby improving the stability of the power system, increasing the renewable energy and network capacity. [0003] The basic principle of flywheel energy storage technology is that the electric energy generated by the wind power generation system is driven by the motor to rotate the flywheel, and the electric energy is converted into kinetic energy and stored in the high-speed rotating flywheel. When the energy needs to be released, the flywheel drives the motor to generate electricity, converts the kinetic energy into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/16H02P6/06H02J3/30
CPCY02E60/16
Inventor 王磊宋永端杜晓强陈柳王玉兴
Owner 迪比(重庆)智能科技研究院有限公司
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