Wind vane fault redundant operation method and system for wind power generator

Abstract

The invention provides a wind vane fault redundancy operation method and system of a wind turbine generator. The method comprises the steps of collecting the wind speed value output from an anemometerof the wind turbine generator, wherein the anemometer is a wind cup anemometer with three wind cups; determining the change rule of the wind speed value; and judging whether the wind direction changes on the basis of the change rule of the wind speed value so as to control the yaw operation of a wind turbine of the wind turbine generator when wind vanes of the wind turbine generator malfunction.According to the operation method provided by the invention, based on the change rule of the wind speed value output from the anemometer of the wind turbine generator, the wind turbine is subjected toyaw control so that the redundancy operation is achieved after the wind vanes of the wind turbine generator malfunction; the problem of inaccurate data that the redundancy operation of the wind turbine is based on is solved, and the normal operation of the wind turbine generator is ensured; and the cost is saved.

Description

Technical field [0001] The invention relates to the field of wind power, and more specifically, to a method and system for redundant operation of a wind vane failure of a wind generator. Background technique [0002] With the gradual expansion of the scale of wind turbines and the improvement of unit safety protection, the power generation performance of the operation of wind turbines, that is, to improve the power generation and availability of wind turbines, has received more and more attention. The main control system of the wind turbine is the main body of the control system of the wind turbine. It realizes important control functions such as automatic start, automatic wind adjustment, automatic speed regulation, automatic grid connection, automatic disconnection, automatic cable unwinding, automatic recording and monitoring, and fault protection functions. Among them, the fault protection function of the fan is very important to the safe operation of the fan. The fault prot...

AI Technical Summary

Problems solved by technology

[0004] At present, the fault protection of wind turbines is mostly single-fault protection, that is, when a fault occurs in the wind turbine, the main control system immediately controls the wind turbine to shut down, thus causing a certain amount of downtime and loss of power generation

When the wind vane fails, the unit will be shut down, and it will take at least 2 to 4 hours for the maintenance personnel to replace the wind vane; if there is no spare parts for the wind vane, the turbine will be shut down for 1 to 2 weeks, resulting in more downtime

The cost of installing multiple wind vanes is higher

[0005] Among the existing wind vane failure redundant operation methods, some methods use the historical data before the wind vane failure as the operation basis to achieve redundant operation. In this case, when the wind direction changes, it will cause the wind turbine The affected wind force is severely reduced or even shut down, affecting power generation

There are also some methods to achieve redundant operation by using the data of adjacent wind turbines. In this case, the central monitoring and forwarding data of the wind farm is required, which will consume a long communication cycle, but the change of wind direction is instantaneous, so In the case of frequent wind direction changes, the data has a certain lag and is difficult to use as a reference; in addition, due to the wake effect of the wind turbines in the wind farm, the wind direction will change to a certain extent among the wind turbines. In addition, in some areas (especially in mountainous areas), the wind speed and wind direction values ​​are also different at each location, which makes the wind condition data of adjacent wind turbines cannot be used as a reference. Therefore, the wind vane failure redundant operation method in the prior art is widely used. have certain limitations

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