Power supply control device of wind power generation system

Abstract

The invention relates to a power supply control device of a wind power generation system. The wind power generation system comprises a wind turbine, and the wind turbine is sequentially connected witha doubly-fed wind power generator, a transformer, a rectification current, a boost converter, a direct-current cable and a grid-connected power supply interface. The power supply control device comprises a collecting module, a controller and a driving module; the colleting module is used for acquiring data of the wind power generation system; the controller is used for analysis and processing according to the collected data, an operation mode of the wind turbine is determined according to the phase difference and the frequency difference, and a control instruction is output to the driving module; the driving module drives the wind turbine to change the operation mode. According to the device, the output voltage and the phase of the wind turbine are adjusted by rapidly adjusting the running conditions of wind turbine blades so that the wind turbine can meet the requirement of a power grid for power supply stability, and the electric energy quality of grid-connected power supply of thewind power generation system is improved.

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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