Method for avoiding pump surges in a compressor

Abstract

A method for avoiding pump surges in a compressor is provided, wherein a plurality of parameters of the compressor are monitored during operation and a desired value range for the plurality of parameters is predetermined, wherein a reaction that counteracts the pump surge is triggered if a number of parameters from the desired value range are exceeded or fallen below. The method also reliably prevents pumping of the compressor during a comparatively high running performance. For this purpose, the plurality of parameters has a parameter assigned to the rotational noise of the compressor.

1 .- 13 . (canceled) 
     
     
         14 . A method for avoiding pump surges in a compressor, comprising:
 monitoring a plurality of parameters of the compressor during the operation and predetermining a desired value range for the plurality of parameters,   triggering a reaction that counteracts an imminent pump surge if a number of parameters from the desired value range are exceeded or fallen below,
 wherein the plurality of parameters comprises a parameter assigned to rotational noise of the compressor, and 
 the parameter assigned to the rotational noise of the compressor is a vibration amplitude and/or frequency of a component of a fluid-flow machine, and the component is a shaft and/or a housing of the compressor, and 
   detecting mechanical vibrations with sensors fitted at multiple points on the circumference of the compressor.   
     
     
         15 . The method as claimed in  claim 14 , wherein, in order to determine the rotational noise, accelerations of the component are detected. 
     
     
         16 . The method as claimed in  claim 14 , wherein the plurality of parameters comprises shaft rotational speed, compressor final pressure and/or pre-rotation vane position. 
     
     
         17 . The method as claimed in  claim 14 , wherein the reaction counteracting the pump surge comprises a reduction in the desired value of turbine outlet temperature and/or a reduction in fuel mass flow. 
     
     
         18 . The method as claimed in  claim 14 , wherein the compressor is part of a fluid-flow machine. 
     
     
         19 . A compressor, comprising:
 a control device, which, on the data input side, is connected to a plurality of sensors which are designed to detect parameters during the operation,   wherein the plurality of sensors are designed to detect a parameter assigned to the rotational noise of the compressor,   wherein the plurality of sensors are vibration sensors which are arranged on the compressor of the gas turbine and determine mechanical vibrations of the components, and   wherein the sensors are arranged at multiple points on the circumference of the compressor.   
     
     
         20 . The compressor as claimed in  claim 19 , wherein the plurality of sensors are configured as acceleration sensors. 
     
     
         21 . A fluid-flow machine having a compressor as claimed in  claim 19 . 
     
     
         22 . A power plant having a fluid-flow machine as claimed in  claim 21 .