The invention discloses an exhaust detection method and device of a piezometric pipeline. The method comprises the steps that a healthy parameter sample is established, wherein the healthy parameter sample comprises an upper reservoir water level, a lower reservoir water level, a guide vane opening of a pump turbine, a GCB switching signal and a pressure quantity; a current operation parameter sample is acquired, wherein the current operation parameter sample comprises a current upper reservoir water level, a current lower reservoir water level, a current guide vane opening of the pump turbine, a current GCB switching signal and a current pressure quantity; and the healthy parameter sample and the current operation parameter sample are processed, and whether the piezometric pipeline needsexhaust operation or not is judged according to a processing result. The exhaust detection method and device of the piezometric pipeline can determine an exhaust operation opportunity according to various operation parameters of a pumped storage unit, improve the accuracy of a measurement result, and improve the operation stability of the unit.

Exhaust detection method and device of piezometric pipeline

The invention relates to a method for generating and applying press fitting and tightening curve envelope lines. Firstly, envelope line generating parameters, an envelope line algorithm and an envelope line mode are set; Then, according to a group of qualified curves, calculating upper and lower envelope lines of the qualified curves by configuring set envelope line parameters, an envelope line algorithm and an envelope line mode; And whether the pressing and tightening processes meet the requirements or not is judged according to whether actual process production data are between the upper and lower envelope lines or not. A series of parameters and specific algorithms are applied. generating a complete envelope line through a group of qualified curves; Two envelope lines on the upper portion and the lower portion of the qualified curve are generated to be used for process control, fine adjustment and correction can be conducted on the press fitting and tightening process according tothe process before control, more accurate press fitting and tightening control is obtained, the method is different from a broken line mode with the fixed point number in the past, and therefore the monitoring precision of the press fitting and tightening process is improved.

Press fitting and tightening curve envelope line generation and application method

The invention provides a method and a device for analyzing the pressure fluctuation in a transient process of a pumped storage power station. The method comprises the following steps: decomposing measured pressure data collected under each transient process condition by using an empirical mode decomposition method to obtain pressure fluctuation terms; utilizing a confidence level method to analyzethe pressure fluctuation under each transient condition, and obtaining the peak value of pressure fluctuation under the corresponding transient condition; obtaining a fitting curve of pressure fluctuation by fitting the peak-peak value of pressure fluctuation under the above-mentioned transient process conditions. The pressure fluctuation fitting line determined by the invention has an importantguiding significance to the determination of the design parameters for the regulation and guarantee in the design phase, the calculation of the transition process in the commissioning phase and the stable operation of the power station.

A method and a device for analyzing the pressure fluctuation in a transient process of a pumped storage power station

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A method and a device for analyzing the pressure fluctuation in a transient process of a pumped storage power station