A Wind Power Prediction Method Considering Air Humidity

Abstract

The invention discloses a wind power prediction method considering air humidity. The method comprises the steps of 1, collecting basic data information; 2, collecting real-time numerical weather forecast data, real-time output power data of a wind power plant, and real-time running state data of wind power units and the wind power plant; 3, according to the real-time data obtained in the step 2, calculating absolute air humidity e' of the wind power plant and air density rho considering the absolute air humidity; 4, performing real-time fitting correction on a power-wind velocity (P-V) curve to obtain a cut-in wind velocity Vci zeta, a cut-out wind velocity Vco zeta, and a rated wind velocity VN zeta after fitting correction at a zeta moment; 5, obtaining a power-wind velocity (P theta zeta-V zeta) curve of the air density rho, considering the absolute air humidity, of a (zeta)th fan at the zeta moment; and 6, calculating a wind power prediction value P zeta of the whole wind power plant at the zeta moment. The problem of low wind power prediction precision in an existing wind power prediction technology is solved.

Description

technical field [0001] The invention belongs to a wind power prediction method, in particular to a wind power prediction method considering air humidity. Background technique [0002] A wind farm uses several or more scientifically calculated wind turbines installed at a reasonable distance within a certain predicted coordinate range, and uses the power generated by wind energy within a controllable range to achieve operational power supply. Since the wind is produced by the air flow caused by the difference in atmospheric pressure, the wind direction and the size of the wind are changing all the time. Therefore, wind power generation has the characteristics of volatility, intermittent and randomness. The power fluctuations of wind farms caused by these characteristics will have an impact on the overall operation of the regional power grid, which in turn will affect the voltage stability in the entire regional power grid. Therefore, when wind farms, especially large-capaci...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a wind power prediction method considering air humidity, so as to solve the problem of wind power prediction accuracy after the actual power curve of the wind turbine deviates from the theoretical power curve without considering the air humidity and the actual power curve of the wind turbine in the existing wind power prediction technology. The influence of wind power, resulting in technical problems such as low accuracy of wind power forecasting

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