Meteorological Forecast Method of Area Rainfall in Hydropower Station Basin Based on GIS Division

Abstract

The invention discloses a hydropower station basin rainfall meteorology forecast method based on a GIS subarea. Based on meteorological observatory forecast products and value forecast products, areal rainfall of each basin within a presidial area is forecasted, integration of computer systems is realized, automatic data acquisition is realized, unified forecast of an electric network and all the hydropower stations in the whole area is carried out, pre-forecast precision is high, a data access function is realized through database linkage, through the web network, website release and browsing of meteorology information are realized, scientific basis is provided for electric production and electric scheduling, and the method has excellent application prospects.

Description

technical field [0001] The invention relates to the technical field of power grid weather forecasting, in particular to a method for forecasting area rainfall in a watershed of a hydropower station based on GIS divisions. Background technique [0002] The power grid is an organic whole. The total production, transmission and use of AC power in the power grid is changing at any time, but it must be kept in balance at any moment, so as to ensure that the power quality indicators meet the standards stipulated by the state. Power dispatching is It is an effective management method adopted to ensure the safe and stable operation of the power grid, reliable external power supply, and orderly progress of various power production tasks. The power production and operation are more and more affected by weather and the environment, and the demand and application of weather information are becoming more and more extensive. However, due to the limitation of meteorological technology equi...

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Problems solved by technology

[0004] 1. Meteorological forecast products are mainly conventional forecasts provided by local meteorological stations. The forecast scope and weather process are broad and difficult to quantify; in addition, the evacuation of hydropower stations in various counties and cities, and the strong locality of precipitation, the forecast range is too large with points instead of planes. Large and insufficiently representative, it is difficult to truly reflect the actual rainfall in each hydropower station area;

[0005] 2. The numerical forecast products of meteorological forecast products are not targeted enough. Most of them only forecast the rainfall of stations or grid points, and there is no weather forecast specifically for power dispatching. In order to carry out cascade interval flow forecasting, hydropower optimization dispatching arrangements, and save land The joint optimal dispatch of large and small hydropower provides a basis for decision-making, and power production often falls into a passive response situation;

[0006] 3. There are limitations in the forecasting method of areal rainfall, and the lack of forecasting experience of forecasters, sometimes the forecast of heavy precipitation is accurate, but the forecast deviation of areal rainfall is relatively large, which also affects power production;

[0007] 4. Some hydropower stations self-built automatic rainfall telemetry stations in the reservoir area were evacuated, and the meteorological information lagged behind, making it difficult to meet the flow forecast requirements. lack of planning forecast

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