Engine room wind speed and power curve based method for evaluating theoretical power of wind farm

Abstract

An engine room wind speed and power curve based method for evaluating theoretical power of a wind farm. The method comprises the following steps of: determining measurement data of an engine room wind speed of a wind turbine generator and an actual output power of the wind turbine generator within a normal operation period of the wind turbine generator; determining a wind speed and power curve of the engine room wind speed and the actual output power within the normal operation period of the wind turbine generator; determining theoretical power of the wind turbine generator within an abnormal operation period of the wind turbine generator; and determining the theoretical power of the wind farm within the abnormal operation period of the wind turbine generator. According to the method, a wind tower does not need to be set up, so that operation and maintenance cost of the wind farm can be greatly reduced; errors introduced due to an excessively long distance and improper selection of parameters or methods in the flow field calculation process are avoided and estimation accuracy is improved; and due to refinement of calculation to the single fan degree, the method is convenient to distinguish whether the source of electricity loss is scheduling abandoned wind or a fan failure and the like.

Description

technical field [0001] The invention relates to a method in the technical field of wind power generation, in particular to a method for evaluating theoretical power of a wind farm based on a wind speed power curve of a nacelle. Background technique [0002] With the rapid development of wind power, the phenomenon of wind curtailment due to limited capacity is frequent, and there are also power losses due to failures and shutdowns. How to scientifically evaluate these power losses and their causes has become more and more widely used in the industry focus on. To evaluate the power loss, it is first necessary to evaluate the theoretical power of the wind turbine / wind farm, which is also called "theoretical power". [0003] In actual production, the power loss reported by wind farms to dispatchers, some use the installed capacity as the theoretical power, some use the average value of the power at the beginning and end of the calculation period as the theoretical power, and so...

AI Technical Summary

Problems solved by technology

Existing historical data methods focus on the entire wind farm and analyze it from a macro perspective. It is difficult to carry out detailed calculations, so the calculation accuracy is generally not high.

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