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Reservoir level process smoothing method

A reservoir water level and smoothing technology, which is applied in image data processing, instruments, calculations, etc., can solve unsatisfactory problems, achieve the effects of saving construction management costs, improving calculation accuracy, and having versatility

Inactive Publication Date: 2013-05-22
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +2
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  • Application Information

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Problems solved by technology

So far, there are various solutions to this problem, but none are very ideal, and a clear solution is still needed

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  • Reservoir level process smoothing method

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Embodiment 1

[0035] This embodiment is a method for smoothing the reservoir water level process. The idea of ​​the method is as follows:

[0036] The original water level data collected by the reservoir is assumed to be a discrete random signal. Due to the existence of random interference, the process drawn by the random signal is mostly in the shape of a broken line, indicating that the sampling data has the characteristics of a non-stationary random process. In order to eliminate or weaken the influence of disturbance, the water level process data need to be smoothed. The principle of smoothing is not only to eliminate the interference components in the data, but also to keep the original basic shape of the water level process unchanged. The smoothing method uses the five-point cubic method and the moving average method, and its principle is as follows:

[0037] set 2 n +1 equidistant nodes X -n , X -n+1 ..., X -1 , X 0 , X 1 ,... X n-1 , X n The experimental data on the...

Embodiment 2

[0077]This embodiment is an improvement of the first embodiment, and it is about the parameters of the first embodiment K detailed description. The parameters described in this example K The value range of is 1.0~0.0. The water level process of the output smoothing process also follows the K The value tends to be gentler from large to small, according to the formula It can be seen that:

[0078] If take K =1.0, then the output smoothing result is the processing result of the five-point cubic smoothing method, and its process is closest to the original process shape; if K =0.0, the output smoothing process is the processing result of the moving average method, and the smoothness of the process is strong; if K =0.5, the smoothness of the output process is in the middle of the processing results of the five-point cubic smoothing method and the moving average method. In general, the smoothness of the output process after the sliding average method is stronger than that of ...

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Abstract

The invention relates to a reservoir level process smoothing method. The method includes the steps of processing actual reservoir level measurement process; calculating the process of equal-duration level time sequences; and selecting different process outputs according to parameters. Level data with fluctuation anomaly during the smoothed reservoir level process can be filtered, smooth reservoir level output process is guaranteed, and reservoir operation conditions are reflected more really. Abnormal data such as negative flow and jagged fluctuation can be avoided by subjecting the smoothed reservoir level process to entry flow reversing, and calculating accuracy can be improved effectively. The requirements for installation position and precision of level meters on reservoir dams can be lowered moderately by the use of the method, and cost in construction and management of level observation stations is lowered. The reservoir level process smoothing method is universal and adjustable and meets the requirements of various reservoirs for smoothing of actual level measurement process.

Description

technical field [0001] The invention relates to a method for smoothing the water level process of a reservoir, and provides a water level data reorganization and correction scheme, which is mainly used for effectively processing the measured data of the water level of the reservoir. Background technique [0002] Because the original reservoir water level value directly monitored by the reservoir is affected by many factors such as fluctuations (power generation start-up and shutdown, opening and closing gates, dynamic storage capacity, etc.), it is difficult to represent the real reservoir water level process, and the measured reservoir water level process is used to directly calculate the storage. Most of the flow process fluctuates sharply in a jagged shape, and even has negative values. The calculation results are seriously distorted and can only be used after manual correction. In specific applications, how to effectively process the collected measured reservoir water le...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 陆玉忠陈标胡宇丰吴剑锋郭易黄馗安波苏景辉张云辉徐海卿李匡于茜武炜孙扬马岚
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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