Engine room-type laser wind finding radar for multi-distance layered measurement of wind field and measurement method thereof

Abstract

The invention discloses an engine room-type laser wind finding radar for multi-distance layered measurement of a wind field. An output end of a narrow linewidth seed light source is connected with an input end of an optical fiber amplifier; the output end of the optical fiber amplifier is connected with the input end of an optical fiber splitter; a first output end of the optical fiber splitter is connected with the input end of an acoustooptic frequency shifter; a second output end of the optical fiber splitter is connected with a first port of an optical fiber circulator; the output end of the acoustooptic frequency shifter is connected with a first input end of an optical fiber combiner; a third port of the optical fiber circulator is connected with a second input end of the optical fiber combiner; a second port of the optical fiber circulator is connected with the input end of a photoswitch; a plurality of output ports of the photoswitch are connected with an even number of optical antennas; the output end of 2*2 optical fiber combiner is connected with the input end of a balanced photoelectric detector; and the output end of the balanced photoelectric detector is connected with a signal processing circuit. The invention further provides a measurement method of the engine room-type laser wind finding radar for the multi-distance layered measurement of the wind field. The engine room-type laser wind finding radar and the measurement method thereof have the beneficial effects that the radar cost is reduced and the measurement capability of the radar wind field is improved.

Description

technical field [0001] The invention relates to the technical field of meteorological radar detection, in particular to a nacelle-type laser wind-measuring radar for multi-distance and layered wind field measurement and a measurement method thereof. Background technique [0002] Wind power generation is to convert wind energy into electrical energy, accurately and timely measure the wind direction and wind speed of the wind power plant, and adjust the wind turbine to the best position, which is the key to improving power generation efficiency and reducing equipment wear and tear. There is a large deviation between the data obtained by the traditional wind measurement tower wind measurement method adopted by the wind power plant and the actual wind direction and wind speed faced by a single wind turbine, so that the wind turbine cannot be adjusted to the best position, which affects the wind power efficiency. In order to improve power generation efficiency, foreign manufactur...

AI Technical Summary

Problems solved by technology

Both Wind Iris and Nacelle Lidar can be layered in distance, that is, they can measure wind speed and wind direction at multiple distances at the same time, but they use pulsed lasers, which are bulky and costly, which is unaffordable for small wind turbines.

ZephIR DM adopts the continuous laser system, and realizes the adjustable measurement distance of 10-300 meters by means of motor focusing, and can measure the wind field at 10 distances. The focusing method makes it time-consuming to complete the entire wind field measurement at one time, and the mechanical scanning and focusing components make the whole machine poor in reliability and short in life

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