Modeling of Steam Turbine's Governing System During Main Steam Valve Activity Test and Control Optimization

doi:10.16182/j.issn1004731x.joss.201710039

Abstract

Abstract: A Model of 300 MW thermal power unit's governing system of steam turbine is established to analyze its load fluctuation during main steam valve activity test. The model contains three sub-models; they are the model of turbine's governor during main steam valve activity test, the model of electric-hydraulic servo actuator, and the model of turbine considering governing valve's discharge characteristic. The analyses on these models indicate that mismatch among control model, configuration of DEH (Digital Electric Hydraulic Control System) and characteristic of the unit is the cause of load fluctuation. Through simulation, the method for load fluctuation suppression was determined. Result of actual main steam valve activity test based on the method shows that load fluctuation is obviously suppressed after control optimization.

Key words: main steam valve activity test, load fluctuation, governing system of steam turbine, control optimization

CLC Number:

TP391.9

Sheng Kai, Peng Shuangjian, Xun Xin, Wang Bochun, Fu Qiang. Modeling of Steam Turbine's Governing System During Main Steam Valve Activity Test and Control Optimization[J]. Journal of System Simulation, 2017, 29(10): 2542-2549.

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