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An Improved Method for Compensating Moment of Inertia of Wind Turbine Simulator Based on Deviation Suppression

A technology of moment of inertia and wind turbine, applied in the field of improvement of moment of inertia compensation of wind turbine simulator based on deviation suppression, to achieve the effect of simple method and obvious improvement effect

Active Publication Date: 2018-06-12
NANJING UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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  • An Improved Method for Compensating Moment of Inertia of Wind Turbine Simulator Based on Deviation Suppression
  • An Improved Method for Compensating Moment of Inertia of Wind Turbine Simulator Based on Deviation Suppression
  • An Improved Method for Compensating Moment of Inertia of Wind Turbine Simulator Based on Deviation Suppression

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Embodiment I

[0041] Simulation embodiment I: adopt step wind as input quantity, J t Set to 0.3kgm 2 (greater than 2J s ), the deviation suppression link is not used, and the simulation results are as follows figure 2 As shown in , it can be seen that the oscillation of the torque compensation branch leads to the instability of WTS operation.

[0042] Simulation Example II: Using α d The deviation suppression link is 0.9, and the simulation results are as follows image 3 It shows that the deviation suppression link can maintain the stable operation of WTS and make it reproduce the dynamics similar to the actual wind turbine.

Embodiment III

[0043] Simulation Example III: If α d If it is set too large, such as 0.98, the amplitude-frequency response of torque compensation will attenuate too much in the high frequency band, and the instantaneous response will also slow down, resulting in a large deviation between the dynamic process of the improved WTS and the actual wind turbine. The results are as follows Figure 4 shown.

[0044] Then, in order to verify the improvement of the stability and simulation performance of the WTS system by the deviation suppression link, a series of experiments are carried out.

[0045] The WTS experimental platform is established in the laboratory, and the main components are:

[0046] 1) A three-phase asynchronous motor is connected to a permanent magnet synchronous generator;

[0047] 2) Optical rotary encoder with 1024 pulses per revolution;

[0048] 3) ETS based on VACON torque control converter;

[0049] 4) Real-time digital control system (RTDCS) based on Beckhoff PLC;

[0...

experiment Embodiment I

[0053] Experimental embodiment I: at first, make traditional WTS outside the stable domain (J t set to 3J s ). According to the stability judgment condition of traditional WTS (J t s ), WTS is expected to be unstable. Consistent with the estimate, Figure 5 The operational state data shown shows that the WTS system is oscillating, not to mention accurately simulating actual wind turbine dynamics.

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Abstract

The invention discloses a wind turbine simulator rotational inertia compensation improving method based on deviation inhibition. According to the method, the problem that when current wind turbine simulators (WTS) simulate a wind turbine with the large rotational inertia, instability will happen is solved. Through the deviation inhibition link based on a first-order digital low pass filter, divergence deviation components of the WTS rotational inertia compensation link are restrained. According to the method, the problem that when the WTS simulates the wind turbine with the rotational inertia exceeding that of an experimental facility by two times, instability will happen is solved, the stability range of the WTS is expanded, and the WTS can stably simulate the wind turbine with the large rotational inertia.

Description

technical field [0001] The invention belongs to the field of wind turbine simulators, in particular to an improved method for compensating the rotational inertia of a wind turbine simulator based on deviation suppression. Background technique [0002] Because it is very difficult and time-consuming to carry out field experiments on actual wind turbines, the Wind Turbine Simulator (WTS), as an experimental device that can simulate wind turbines in experiments, has an effect close to that of on-site wind turbines, and has become a very important aspect of wind power research. experimental tools. [0003] The difficulty of WTS simulating a wind turbine is that the moment of inertia of the experimental platform is much smaller than that of the actual wind turbine. The commonly used solution is to add a dynamic torque compensation branch to compensate the moment of inertia, so as to realize the simulation of the large moment of inertia wind turbine by the small moment of inertia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D17/00
Inventor 殷明慧李伟杰何立君陈载宇徐洋超路英伟刘尚孟卜京谢云云姚娟蔡晨晓邹云
Owner NANJING UNIV OF SCI & TECH
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