Method and system for steady-state modeling of wind power plant based on measured data

Abstract

The invention relates to a method and a system for the steady-state modeling of a wind power plant based on measured data. The method comprises the steps of fitting according to the measured data, including wind speeds and output powers corresponding to all the wind speeds, of all wind power generation sets of the wind power plant, so as to determine a wind speed-power characteristic curve; carrying out cluster analysis on the wind power generation sets in grid-connected operation according to the measured data, including the wind speeds of different time points, of the wind power generation sets in grid-connected operation, and determining an equivalent wind speed of the wind power plant according to the wind speed of a representative wind power generation set, in a cluster analysis result, of the wind power plant; determining the output power of the whole wind power plant according to the wind speed-power characteristic curve in a manner of taking the equivalent wind speed of the wind power plant as an input wind speed; establishing a steady-state equivalent model of the wind power plant according to the equivalent wind speed of the wind power plant and the output power of the whole wind power plant. According to the method, the established steady-state model of the wind power plant has the advantages that the error between equivalent model output of the wind power plant and actual output of the wind power plant is reduced, and the relationship characteristics between wind speed and output power of the wind power plant can be reflected more accurately.

Description

technical field [0001] The invention relates to the field of wind farm modeling, in particular to a wind farm steady-state modeling method based on measured data and a wind farm steady-state modeling system. Background technique [0002] Wind power is currently the most mature and most promising energy utilization method for large-scale development and commercialization among renewable energy development technologies. However, due to the intermittent and random nature of wind energy, the output power of wind farms fluctuating with wind speed is not stable. In order to effectively understand the real situation of the wind farm, reflect the relationship between wind speed and output power of the wind farm, and then effectively control the output power or power supply of the wind farm, the wind farm is modeled to simulate the real situation of the wind farm. It is an important work in the field of wind farm technology. When modeling a wind farm, the ideal situation is to mode...

AI Technical Summary

Problems solved by technology

However, compared with traditional power plants, large-scale wind farms consist of dozens or even hundreds of wind turbines. If each wind turbine is modeled in detail, the model will be very complicated, the calculation will be huge, and the simulation will not be complete. Therefore, it has important application value and academic significance to study how to establish a wind farm model with practical engineering and high accuracy

At present, the traditional wind farm modeling method uses the average wind speed of all wind turbines as the equivalent wind speed of the wind farm, and based on the wind speed-power provided by the wind turbine manufacturer, the wind farm model is modeled accordingly , this modeling method, because the average wind speed of all wind turbines does not represent the actual wind speed of the wind farm, and there is a certain error between the wind speed-power curve provided by the wind turbine manufacturer and the actual operating power characteristics of the wind turbine, resulting in the final establishment of There is a large error between the wind farm model and the output of the wind farm, which cannot truly and effectively reflect the actual situation of the wind farm

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