Uncertainty Evaluation of Steam Turbine Performance Tests

A model for uncertainty evaluation on performance tests of complicated industrial systems was established,while the definition of influence factor(IF) and specific evaluation way described.Based on analysis of IF,the selection and arrangement of measuring instruments were suggested.A new method named uncertainty pre-evaluation(UP) was proposed for control of the test uncertainty.Taking the heat rate performance test of a 600 MW ultra-supercritical steam turbine as an example,a case study including a complete procedure of uncertainty evaluation has been performed,after which the measuring points which may have large influences on the uncertainty evaluation are pointed out,while corresponding countermeasures proposed.