A wind power generation system power supply control device

Abstract

This application relates to a power supply control device for a wind power generation system, the wind power generation system includes a wind turbine, and the wind turbine is sequentially connected to a doubly-fed wind power generator, a transformer, a rectifier current, a boost converter, a DC cable, and a grid-connected power supply interface The power supply control device includes an acquisition module, a controller, and a drive module; the acquisition module is used to acquire data of the wind power generation system; the controller performs analysis and processing according to the collected data, and according to the phase difference and the frequency difference , determine the operation mode of the wind turbine, and output a control instruction to the driving module, and the driving module drives the wind turbine to change the operation mode. The application quickly adjusts the operation of the blades of the wind turbine, adjusts the output voltage and phase of the wind turbine, so that the wind turbine can meet the demand for stable power supply of the grid, and improves the power quality of the grid-connected power supply of the wind power generation system.

Description

technical field [0001] The application belongs to the technical field of new energy power supply, and in particular relates to a power supply control device for a wind power generation system. Background technique [0002] In the prior art, there are a lot of harmonics in the wind power supply, and it is difficult to stably supply grid-connected power to the grid. As a result, although the wind generator uses wind energy to generate electricity, it cannot be transmitted well. In some existing technologies, in order to be able to stably To transmit the electric energy generated by the wind power generation system to the grid, it is necessary to convert the electric energy generated by the wind power generation system multiple times to form a stable direct current, store it in the battery, and then transmit the electric energy from the battery when the grid or load needs it Going out, this will cause multiple conversions of electric energy, and the energy is easily lost. At th...

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Problems solved by technology

[0002] In the prior art, there are a lot of harmonics in the wind power supply, and it is difficult to stably supply grid-connected power to the grid. As a result, although the wind generator uses wind energy to generate electricity, it cannot be transmitted well. In some existing technologies, in order to be able to stably To transmit the electric energy generated by the wind power generation system to the grid, it is necessary to convert the electric energy generated by the wind power generation system multiple times to form a stable direct current, store it in the battery, and then transmit the electric energy from the battery when the grid or load needs it Going out, this will cause multiple transformations of electric energy, and the energy is easily lost. At the same time, a large number of batteries need to be used, resulting in increased power supply costs

[0003] In the existing technology, due to its intermittent nature, the wind power generation system cannot be directly connected to the grid because it cannot quickly track the phase, frequency, and there are a large number of harmonics, which will cause pollution to the grid. There is an urgent need for a fast and direct grid connection. The wind power system of the network can directly control the wind turbine by quickly tracking the phase and frequency to achieve fast power supply

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