A kind of wind power generation system power supply control method

Abstract

The present application relates to a power supply control method for a wind power generation system, the wind power generation system including a wind turbine, including the following steps: (1) detecting the first current Io and the first voltage Vo at the power supply end of the wind power generation system; (2) detecting the wind power generation The second current Ii output by the wind turbine of the system; (3) Establish an equivalent model of the power supply line, calculate the first phase angle between the first voltage Vo and the first current Io and the first frequency of the power supply terminal; (4) Calculate the difference between the first phase and the preset phase and the frequency difference between the first frequency and the preset frequency, and adjust the output voltage and phase angle of the wind turbine of the wind power generation system according to the phase difference and the frequency difference. 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 method for controlling power supply of 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...

AI Technical Summary

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

Images