Method for improving exhaust capacity of wind turbine generator system through dynamic lookup table control algorithm

Abstract

The invention discloses a method for improving the exhaust capacity of a wind turbine generator system through a dynamic lookup table control algorithm. The method includes the steps that firstly, an atmospheric pressure sensor is mounted on the wind turbine generator system and used for collecting the air pressure value of ambient air, and an environment temperature sensor of the wind turbine generator system is used for collecting the temperature value of the ambient air; then the collected air pressure value and the collected temperature value of the ambient air are substituted into a gas state equation to obtain the air density value of the ambient air; and finally, the air density, the maximum wind-power utilization coefficient of an impeller, the optimal impeller tip speed ratio of the impeller and the energy transmission efficiency of a driving chain are input to the calculation formula for converting wind energy into electric energy for the wind turbine generator system, the optimal given power of generator rotating speed down converters is obtained, the optimal given power is input to a power controller of the wind turbine generator system, and the highest exhaust capacity of the system is achieved finally. By means of the method, the problem that the saturability of a generating capacity and power curve of the middle and medium air speed sections of an existing wind turbine generator system is low can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of improving the efficiency of wind power generators, in particular to a method for improving the output of wind power generators by using a dynamic look-up table control algorithm. Background technique [0002] At present, there are two optimal wind energy utilization coefficient tracking control methods for wind turbines, which are the conventional speed-power look-up table control method (method 1) and the speed-torque based PI control method (method 2). Method 1 or Method 2, the given power or torque in the algorithm controller is the optimal given under a fixed air density, because the air density is related to the air pressure and temperature of the environment, and the air pressure and ambient temperature in a day are It changes in real time, which will lead to some deviation between the actual given power or torque and the optimal given after the air density changes, which will affect the power gener...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a method for improving the output of wind power generators using a dynamic look-up table control algorithm, which can effectively solve the saturation of power generation and power curves of such wind power generators in the middle and low wind speed segment low degree problem

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