A grid-connected wind power generator controller and its control method

Abstract

The invention belongs to the technical field of wind power generation, and discloses a grid-connected wind driven generator controller and a control method thereof. The grid-connected wind driven generator controller is provided with a rectification and filtering circuit module, a sampling circuit module, a control circuit module, a contactor module, a voltage reduction circuit module, a voltage stabilizing circuit module, a charging circuit module, a brake control circuit module and a display circuit module, wherein the rectification and filtering circuit module is connected with the sampling circuit module and used for rectifying three-phase alternating current of a grid-connected wind driven generator into smooth direct voltage or current and transmitting the smooth direct voltage or current to a grid-connected inverter, and the grid-connected inverter inverts the direct voltage or current into grid voltage or current or the like required by grid-connected power generation. The control module performs multiple times of similarity calculation, namely, multiple times of enhanced non-linear transformation, a similarity standard is established by using a weighted average of multiple values and multiple standards, and the effects of high efficiency and strong stability of the algorithm are achieved.

Description

Technical field [0001] The invention belongs to the technical field of power generation, and particularly relates to a grid-connected wind power generator controller and a control method thereof. Background technique [0002] As a kind of clean renewable energy, wind energy has a huge amount and is receiving more and more attention from all over the world. As the main control component of the grid-connected wind power generation system, the grid-connected wind turbine controller plays an important role in grid-connected wind power generation. Its important role, but the current grid-connected wind turbine controller, the control circuit adopts battery power supply, when the grid power is cut off, because the battery still supplies power to the controller, the battery loses power, causing permanent damage to the battery. [0003] Grid-connected wind power generation is a large-scale wind power farm with a capacity of about several megawatts to hundreds of megawatts. It consists of d...

AI Technical Summary

Problems solved by technology

This design can meet the requirements for occasional gusts of wind, but if it is a typhoon or a strong wind, the fan will stop, stop, stop, stop..., this cycle goes back and forth The alternate working mode has a great impact on the wind turbines and grid-connected inverters, which seriously affects the service life of the wind turbines and inverters, and the maintenance cost is high

Of course, in order to maintain the continuous operation of the braking circuit, some manufacturers connect the external power supply to the braking circuit, but this solution requires regular maintenance of the external power supply, which consumes a lot of labor and does not fundamentally solve the problem

[0004] To sum up, when encountering strong winds, wind turbine idling accidents are prone to occur

The output voltage of the wind turbine cannot be accurately controlled during the operation of the wind turbine, so that it is impossible to ensure that all components of the grid-connected wind power generation system work at the optimal voltage; moreover, the traditional grid-connected wind turbine controller still has complex design, and the cost of purchasing components high

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