Meteorological radar wind power plant clutter rejection method based on two-dimensional combined interpolation

Abstract

The invention discloses a meteorological radar wind power plant clutter rejection method based on two-dimensional combined interpolation. The method comprises the following steps: under the conditionof low signal to noise ratio, firstly carrying out zero setting on a distance unit containing wind turbine clutter (WTC) and meteorological signals simultaneously, taking the distance unit as a center, selecting two adjacent distance units at two ends respectively, and thus improving the signal to noise ratio through coherent integration; then calculating the one-dimensional interpolation meteorological signal estimated value of a distance domain and the one-dimensional interpolation meteorological signal estimated value of a Doppler domain respectively, and finally carrying out two-dimensional combined interpolation according to a two-dimensional weight coefficient calculated by a least square method. Simulation experiments indicate that the interpolation precision can be improved effectively under the condition of low signal to noise ratio, accurate recovery of meteorological signals is realized, the calculation quantity is small, and the method is applicable for engineering application.

Description

technical field [0001] The present invention relates to a weather radar wind farm clutter suppression method based on two-dimensional joint interpolation, in particular to a weather radar wind farm clutter suppression method based on range-Doppler domain two-dimensional joint interpolation, which belongs to weather radar clutter Inhibition field. Background technique [0002] Rising oil prices, coupled with global climate change, have paved the way for many alternative energy sources—renewable clean energy, the fastest growing of which is wind power. As a clean and renewable energy source, wind power has attracted widespread attention from all over the world. Due to the exponential increase in the number and scale of wind farms, the time-varying motion clutter caused by the high-speed rotation of wind turbine blades has become the main limiting factor restricting the detection performance of weather radars. [0003] The traditional clutter suppression technology is based o...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a weather radar wind farm clutter suppression method based on two-dimensional joint interpolation, which improves the problem that the traditional interpolation cannot restore the weather signal under the condition of low signal-to-noise ratio, and the one-dimensional interpolation Extended to two-dimensional interpolation, which effectively improves the interpolation performance and realizes the accurate recovery of meteorological signals

Images