Small hydroelectric generating set considered day-ahead predication for provincial supply load in geographic survey range

A small hydropower, range technology, applied in the direction of load forecasting, circuit devices, and AC network circuits in AC networks, and can solve problems such as unconsidered

Active Publication Date: 2018-03-06
CHINA THREE GORGES UNIV
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Problems solved by technology

[0008] (3): After the precipitation, the impact of rainwater infiltration and collection on the radial unit is not considered

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  • Small hydroelectric generating set considered day-ahead predication for provincial supply load in geographic survey range
  • Small hydroelectric generating set considered day-ahead predication for provincial supply load in geographic survey range
  • Small hydroelectric generating set considered day-ahead predication for provincial supply load in geographic survey range

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Embodiment Construction

[0027] Principle analysis:

[0028] Under normal circumstances, there are a small amount of small thermal power that can be regulated by prefecture-level dispatching, and its regulation ability is insufficient, so the provincial dispatching center is required to provide electric energy. Therefore, prefectural-level dispatching day-ahead load forecasting is a necessary daily work, and its significance is very important. The purpose of the present invention is to improve the accuracy of the reported provincial supply data, based on increasing the prediction accuracy of the power generation of small radial-flow hydroelectric units, and taking historical weather data and load data as references to provide more accurate provincial supply values ​​to improve economic efficiency. benefit.

[0029] The city-level dispatching structure diagram is as follows figure 1 As shown, according to the total load data of the historical load side and the corresponding weather data, etc., the tot...

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Abstract

The invention provides a small hydroelectric generating set considered day-ahead predication for provincial supply load in a geographic survey range. According to the invention, statistics is performed on capacity of runoff sets of different counties / districts according to county / district administration partition of a prefecture-level city and the whole year is divided into a wet season and a dryseason according to history rainfall data. Weighting treatment is performed on the history rainfall data according to the county / district sets. According to local geographical conditions and influenceon power generation of small hydroelectric generating sets by history rainfall, rainfall impact factors are obtained. Final rainfall data is obtained through rainfall data subjected to weighting treatment and the rainfall impact factors of the different counties / districts. Summation of the above rainfall data of the different counties is made according to different time periods, so that rainfalldata of different time periods of the city is obtained. The rainfall data is taken as input data in a BP neural network method and predicated small hydroelectric generating set power generation volumeis obtained. History load data is taken as a training sample and district load data is obtained. By adopting the invention, predication precision of capacity of the runoff small hydroelectric generating sets is improved and a scheduling model of prefecture-level scheduling is optimized.

Description

technical field [0001] The invention belongs to the field of electric power system operation dispatching, and in particular relates to a method for predicting and saving supply load in the range of ground survey including small hydropower. Background technique [0002] The day-ahead load forecasting of the power grid is the premise and basis for coordinating power generation tasks, and is related to the safe and stable operation of the power system. Day-ahead power load forecasting is the basic task of power energy management and the basic condition to ensure power balance. At present, in the dispatching mode of the State Grid, prefecture-level city power supply dispatching units have to report to the provincial power supply unit the power load of the next day that the prefecture-level city power grid needs to provide from the provincial power grid. For prefecture-level power supply units That is to report "provincial supply load". However, the power sources dispatched by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46
CPCH02J3/46H02J3/003H02J2203/20
Inventor 王凌云孙佳星胡兴媛陈黎
Owner CHINA THREE GORGES UNIV
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