Small fixed-pitch permanent magnet synchronous wind turbine generator system controller

Abstract

The invention provides a small fixed-pitch permanent magnet synchronous wind turbine generator system controller. The wind turbine generator system controller comprises a main controller, a signal acquisition module and a PWM driving module, wherein a main controller built-in algorithm is used for carrying out wind turbine generator system control according to signals; the control strategy is characterized in that when a wind turbine generator system is in a low wind speed area, a maximum power tracking MPPT control is carried out, the wind energy utilization coefficient is maximum so as to obtain the maximum wind energy, when the wind turbine generator system is in a high wind speed area, the wind turbine generator system is maintained to run below the rated rotating speed, the wind energy utilization coefficient is changed, the constant-power control of the wind turbine generator system is realized, and the rated power operation of the wind turbine generator system is guaranteed; andon the basis of the above control strategy, the main controller controls the wind turbine generator system to run at a variable speed according to the wind speed signal through the PWM driving module. According to the wind turbine generator system controller, the small wind turbine generator system controller can stably run at the full wind speed, so that the small wind turbine generator system controller can be smoothly transited at all operation stages, the reliability and the safety of the fixed-pitch variable-speed wind turbine generator system controller are improved, and the instant overload phenomenon in the high-wind-speed region can be effectively inhibited.

Description

technical field [0001] The invention mainly relates to the technical field related to wind power generators, in particular to a controller of a small fixed-blade permanent magnet synchronous wind power generator set. Background technique [0002] With the maturity of wind power generation technology, the development of wind power has become an important means for my country to promote energy production, improve the energy system, and promote the prevention and control of air pollution. Moreover, the stand-alone capacity of wind turbines has grown from tens of kilowatts to megawatts; the control method has gradually developed from simple fixed-pitch stall control to variable pitch variable speed and variable speed constant frequency. The ideal working mode of wind turbines usually consists of three working conditions: the maximum power tracking operation below the rated wind speed AB section, the constant speed operation BC section exceeding the rated speed, and the constant ...

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Problems solved by technology

[0004] Due to the rapid increase in the installed capacity of wind turbines in recent years, some technical equipment supporting wind power has lagged behind. Among them, the controllers of small wind turbines have problems in this regard, such as high cost of use, simple control and lack of integrity. system power control, etc.

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