An Improved Maximum Power Tracking Control Method Based on Fan Effective Tracking Interval
A technology of maximum power tracking and tracking interval, which is applied in the control of wind turbines, wind turbines, motors, etc., and can solve the problems that the wind turbine needs to be further improved.
Active Publication Date: 2016-04-20
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0006] Therefore, the existing various MPPT control methods still need to be further improved in terms of the dynamic performance and tracking effect of the fan
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[0043]On the basis of the traditional optimal torque control method, the present invention proposes an improvement idea of accelerating the maximum power tracking process of the fan by shrinking the tracking interval, and designs an improved maximum power tracking control method based on the effective tracking interval and initial rotational speed adjustment, further Improved wind energy capture efficiency.
[0044] to combine figure 1 , an improved maximum power tracking control method based on the effective tracking interval of the fan in the present invention is based on the optimal torque control method based on the shrinking tracking interval, and periodically adjusts the effective tracking interval and the effective tracking interval of the fan by tracking the concentrated distribution area of wind energy The initial generator speed, so as to realize the maximum power point tracking control, the formula used in the optimal torque control method based on the contracti...
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The invention provides an improved maximum power point tracking control method on the basis of effective tracking intervals of fans. The improved maximum power point tracking control method includes searching the effective tracking intervals of rotational speeds and corresponding optimal starting rotational speeds of the effective tracking intervals on the basis of the optimal torque control process based on contraction tracking intervals so as to control maximum power point tracking. By the aid of the improved maximum power point tracking control method, effective tracking intervals of wind speeds are determined according to wind energy concentrated distribution areas, and the effective tracking intervals of the rotational speeds of the fans and the optimal starting power generation rotational speeds are determined according to the effective tracking intervals, so that the wind energy capturing efficiency can be further improved. The improved maximum power point tracking control method has the advantages that wind energy can constantly captured around the wind energy concentrated areas, and the tracking intervals of the rotational speeds can be quickly and periodically optimized along with change of wind speed conditions; the effectiveness and the advancement of the improved maximum power point tracking control method in an embodiment of the invention are verified as compared with an adaptive torque control method.
Description
technical field [0001] The invention belongs to the field of wind power generation, in particular to an improved maximum power tracking control method based on the effective tracking interval of a wind turbine. Background technique [0002] Variable-speed wind power systems (WPGS) have gained great attention in the past decade due to the fact that variable-speed operation of wind turbines can achieve more efficient energy output, reduce mechanical stress, and improve power quality. In order to maintain an optimal tip speed ratio (TSR) and achieve maximum wind energy capture at different wind speeds, a variable speed WPGS needs to adjust the rotor speed accordingly. [0003] Previous studies have mainly focused on the following types of maximum power point tracking (MPPT) control strategies, namely, TSR control, optimal torque (OT) control, power signal feedback (PSF) control, and hill-climbing search (HCS) control (also known as disturbance observation control). And, some ...
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IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 殷明慧周连俊杨曼张刘冬杨志强蔡晨晓杜宝珠邹云
Owner NANJING UNIV OF SCI & TECH