Pumped-storage unit operating stability state deterioration warning method and system

Abstract

The invention discloses a pump storage unit operation stability deterioration early warning method and a pump storage unit operation stable state deterioration early warning system. The pump storage unit operation stable state deterioration early warning method comprises the steps that stability real-time monitoring of a pump storage unit is carried out to acquire a monitoring value of a stability parameter; according to the working condition parameter of the pump storage unit, an upper limit value and a lower limit value, which are corresponding to a current working condition and a currently-compared stability parameter, are searched in a pre-established numerical early warning model; when the monitoring value is greater than or equal to the lower limit value, and is smaller than or equal to the upper limit value, the stability state of the pump storage unit is determined to be normal, and the monitoring value is stored in a normal state record library; when the monitoring value is smaller than the lower limit value or greater than the upper limit value, early warning information is output, and the monitoring value is stored in an abnormal state record library. By additionally providing the working condition parameter, and the pre-established early warning model is used to provide different alarming limit values for the different working conditions of the pump storage unit, and therefore the effective early warning in different working conditions is realized, the stability problem of the pump storage unit is discovered timely, and the precision of the early warning is improved.

Description

technical field [0001] The invention relates to the technical field of early warning of unit stability, in particular to a method and system for early warning of state deterioration in operation stability of a pumped storage unit. Background technique [0002] The operating parameters that reflect the stability of hydroelectric units mainly include vibration, swing and pressure pulsation. Due to the many operating conditions of the pumped-storage unit, frequent start-up and shutdown, its operating conditions are complex, and unit stability problems occur from time to time. With the development of pumped-storage units toward high water head, large capacity, and high speed, more and more people pay more and more attention to the stability of their operation. Aiming at the operational stability of pumped storage units, researchers have carried out some work by means of on-site testing or on-line monitoring. The current stability state early warning method is a simple absolute...

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Problems solved by technology

[0015] The present invention provides an early warning method and system for the state deterioration of pumped storage unit operation stability, to at least solve the problems that the existing simple absolute value comparison method has a relatively single limit value, problems are not found in time, and the evaluation accuracy is not high

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