Atmospheric boundary layer height inversion method and system based on multi-source atmospheric parameters

Through dual-wavelength lidar measuring color ratio and deviation ratio, setting thresholds to identify cloud layers and finding gradient peaks, solving the problem of lidar inversion of the atmospheric boundary layer in the cloud conditions, improving the operating stability of the power system and Scheduling efficiency.

CN118938248BActive Publication Date: 2025-01-14STATE GRID HUBEI ELECTRIC POWER CO LTD +2
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Patent Information

Application Number
CN202411437532.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-15
Publication Date
2025-01-14
Estimated Expiration
2044-10-15

AI Technical Summary

Technical Problem

The existing lidar is difficult to accurately invert the height of the atmospheric boundary layer under adverse weather conditions such as clouds, resulting in low stable operation and scheduling efficiency of the power system.

Method used

The color ratio and deviation ratio are measured by dual-wavelength lidar, set thresholds to identify cloud layers, find the minimum local peak of the gradient of the lidar distance correction signal, and make threshold judgments to define the height of the atmospheric boundary layer.

Benefits of technology

The stability and accuracy of the height inversion of the atmospheric boundary layer under cloud conditions are improved, the accuracy of wind power and photovoltaic power generation output prediction in the power system is enhanced, and the power load prediction and scheduling efficiency is optimized.

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Abstract

The present application relates to an atmospheric boundary layer height inversion method and system based on multi-source atmospheric parameters, the method comprising the following steps: calculating the laser radar color ratio and depolarization ratio according to the dual-wavelength laser radar echo signal; obtaining the thresholds of the color ratio and depolarization ratio when there are clouds by statistically analyzing typical cases when there are clouds; finding the minimum local peak value of the laser radar distance correction signal gradient; performing threshold judgment on the color ratio and depolarization ratio of the position of the minimum local peak value of the laser radar distance correction signal gradient in turn, and defining the minimum local peak position of the distance correction signal judged by the threshold as the atmospheric boundary layer height. The present application has the characteristics of simple execution, high accuracy and wide applicability, can overcome the influence of the existence of clouds on the atmospheric boundary layer height inversion, and effectively improve the stability of the atmospheric boundary layer height inversion.
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Citation Information

Patent Citations

  • Method and system for identifying atmospheric aerosol and cloud

    CN112698354A

  • Boundary layer height inversion method based on dual-wavelength laser radar

    CN116125494A