Maximum power point (MPP) tracked and controlled improved mountain climbing algorithm based on wind power generation

A technology of maximum power point and tracking control, which is applied in the control of wind power generators, wind power generation, wind power generators, etc., can solve the problems of less research on wind power generation systems, and achieve the goal of overcoming the interference of search direction judgment, efficient development and utilization, and improving The effect of wind energy capture efficiency

Inactive Publication Date: 2011-11-16
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] The hill-climbing method was first applied to the MPPT method of photovoltaic power generation systems, so the research on the above two issues is mainly based on the field of photovoltaic power generation, and there are few related studies based on wind power generation systems.

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  • Maximum power point (MPP) tracked and controlled improved mountain climbing algorithm based on wind power generation
  • Maximum power point (MPP) tracked and controlled improved mountain climbing algorithm based on wind power generation
  • Maximum power point (MPP) tracked and controlled improved mountain climbing algorithm based on wind power generation

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Embodiment Construction

[0037] The present invention will propose an MPP detection function and a stop / restart mechanism on the basis of the existing variable step length climbing method. And partially solve the problem of wind speed interference on the search direction, that is, when the wind speed changes again after the stop mechanism takes effect, the interference of the wind speed change on the search direction judgment can be eliminated. Thus, the disturbance-free and efficient MPPT control at the MPP is realized.

[0038] 1. Implementation principle of MPP detection and stop mechanism

[0039] When the wind speed is constant, the power-speed curve of the wind turbine has a unique extreme value, and the extreme point satisfies . in, is the mechanical power of the wind turbine, in units of W , is the speed of the wind turbine, in units of rad / s . Therefore, the as the search stop condition and consider the algorithm to have detected an MPP. in, Output power for wind power generat...

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Abstract

The invention provides an improved mountain climbing algorithm with a disturbance stop mechanism, aiming at the problem of erroneous judgement of a searching direction resulted from rotation speed oscillation and wind speed change existing in a mountain climbing algorithm at an MPP. The algorithm not only inherits an advantage of a variable step length mountain climbing method for rapidly searching to neighbourhoods of the MPP but also has an MPP detection and stop mechanism. When a fan tracks to the neighbourhoods of the MPP, the MPP detection and stop mechanism not only can be used for effectively reducing the abrasion of the rotation speed oscillation to mechanical parts of a fan system but also can overcome the interference on judging a searching direction when a wind speed changes again after an algorithm stop mechanism becomes effective so as to further increase a wind power capturing efficiency. The effectiveness and the superiority of the algorithm can be verified by a simulation result.

Description

technical field [0001] The invention belongs to the field of wind power generation, in particular to an improved hill-climbing algorithm based on maximum power point tracking control of wind power generation. Background technique [0002] With the increasingly serious energy crisis, the development and utilization of renewable energy is becoming more and more important. Wind power is one of the most widely studied renewable energy sources. How to capture wind energy with maximum efficiency and extend the life of the unit is a hot issue in wind power research. The emergence of variable-speed constant-frequency wind power generation systems provides a technical approach for maximum wind energy tracking. Adjusting the speed of wind turbines in real time according to changes in wind speed to ensure that the wind turbines run on the MPP is the basic idea to achieve maximum power point tracking (MPPT, Maximum Power Point Tracking). . [0003] Commonly used maximum power point t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 张小莲殷明慧蔡晨晓邹云叶星
Owner NANJING UNIV OF SCI & TECH
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