Multi-cave multi-machine water conservancy and hydropower engineering energy index calculating method

Abstract

The invention relates to an energy index calculation technology, in particular to a multi-cave multi-machine water conservancy and hydropower engineering energy index calculating method. The method mainly solves the problems that currently, due to a processing mode with constant force coefficients, the influence of the difference of the energy conversion efficiency of a water turbine at differentmoments on the force and the power generation amount of a power station cannot be truly reflected, and the energy index accuracy is poor; moreover, due to an existing multi-cave multi-machine power station energy index calculation method, power generation diversion flow distribution among caves and machines is conducted generally with the assistance of manual experience, since a calculation targetand principle are not definite and the subject factors are large, during design of cave-machine schemes, it is difficult to ensure that energy indexes among the schemes have a consistent comparison basis, and the scheme reliability is poor. The multi-cave multi-machine water conservancy and hydropower engineering energy index calculating method is characterized in that with the maximum annual power generation amount of a hydropower station being a target energy index, a calculation model is built to calculate other energy indexes, when the multi-cave multi-machine water conservancy engineering power generation flow is optimally distributed, the annual power generation amount of the hydropower station is the largest, and the method is applicable to multi-cave multi-machine water conservancy and hydropower engineering.

Description

technical field [0001] The invention relates to the technology of multi-cavity and multi-machine hydropower and water conservancy projects, in particular to the technology of the energy index calculation method of multi-hole and multi-machine hydropower and water conservancy projects. Background technique [0002] A multi-hole multi-machine hydropower project refers to a hydropower and water conservancy project with multiple water diversion tunnels, each of which corresponds to multiple water turbines. Energy index calculation refers to the process of inflow runoff, reservoir conditions, reservoir power station operation mode, water diversion power generation conditions etc. are known, calculate the power generation output process, power generation head process, power generation and other indicators of the power station. [0003] Calculation of energy index is a very important and basic work in the investigation, design and operation management of hydropower and water conser...

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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for calculating the energy index of multi-cavity and multi-machine water conservancy projects, which solves the problem that the current processing method using fixed output coefficients cannot truly reflect the impact of differences in the energy conversion efficiency of hydraulic turbines at different times on the output and power generation of power stations. The accuracy of the index is lacking, and in the current energy index calculation method of multi-cavity multi-machine power station, the power generation reference flow distribution between the tunnel and the machine is generally based on manual experience. Because of the unclear calculation objectives and principles and relatively subjective factors, in the When designing tunnel drilling schemes, it is difficult to ensure that the energy indicators between the schemes have a consistent basis for comparison, resulting in a problem of lack of reliability of the schemes

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