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A time-sharing tracking method for maximum power of wind-solar hybrid power generation system

A technology of wind-solar hybrid power generation and wind power generation system, applied in wind power generation, photovoltaic power generation, control/regulation system, etc., can solve the problem of high cost, achieve the effect of simple structure, resource optimization and cost reduction

Active Publication Date: 2019-04-30
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

But its cost is higher

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  • A time-sharing tracking method for maximum power of wind-solar hybrid power generation system
  • A time-sharing tracking method for maximum power of wind-solar hybrid power generation system
  • A time-sharing tracking method for maximum power of wind-solar hybrid power generation system

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Embodiment Construction

[0024] The invention is a time-sharing tracking method for the maximum power of a wind-solar hybrid power generation system, such as figure 1 As shown, the wind power generation system and the photovoltaic power generation system share a DC / DC conversion circuit, and the steps are:

[0025] Step 1: Collect the output current i of the wind power generation system under the normal operation of the wind power generation system w , The output current i of the photovoltaic power generation system s , the output voltage E of the wind power generation system and the photovoltaic power generation system in parallel, the output voltage U of the DC / DC conversion circuit in the wind-solar hybrid power generation system 0 ;Detect the speed ω of the wind turbine; calculate the output power variation ΔP of the wind power generation system according to the collected output voltage and output current of the wind power generation system w =P k -P k-1 , where P k ,P k-1 Indicates the outp...

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Abstract

The invention relates to a wind-solar complementary power generation system maximum power time-division tracking method. According to the method, a DC / DC conversion circuit is utilized to realize the time-division tracking of system maximum power; prediction is performed on the basis of the prediction values of a BP neural network for wind speed and illumination intensity; when it is predicted that the illumination intensity is to charge largely, a system begins to track a photovoltaic power generation system; if the wind speed is to change largely, the system switches a tracking target; and in a whole operation process, system switching frequency can be prevented from becoming too high, so that system stability will not be affected; minimum judgment values in tracking target switching are determined according to the prediction values of the wind speed and illumination intensity and the simulation model, so that malfunction can be prevented. The method is simple and can achieve the time-division tracking of the maximum power and reduce costs; and the method can make system output stable and achieve the optimal configuration of resources.

Description

technical field [0001] The invention relates to a time-sharing tracking method for maximum power of a wind-solar hybrid power generation system, in particular to a method for realizing time-sharing tracking of the maximum power of a wind-solar hybrid power generation system by using a DC / DC direct current conversion circuit. Background technique [0002] In recent years, with the rapid development of industry, human's demand for energy has been increasing. The excessive exploitation and utilization of fossil and mineral energy will inevitably lead to energy depletion and damage to the ecological environment. Accelerating the popularization and promotion of clean energy has become an inevitable choice for countries all over the world to implement sustainable development. The complementarity of solar energy and wind energy in terms of time makes the wind-solar hybrid power generation system have a good match in resource distribution. [0003] In the initial stage, the wind-s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/46G05F1/67
CPCG05F1/67H02J3/385H02J3/386H02J3/46H02J2203/20Y02E10/56Y02E10/76
Inventor 王兴贵李源启王海亮杨维满马平郭群
Owner LANZHOU UNIVERSITY OF TECHNOLOGY