Optimization of Steam Governing Arrangement for 600MW Sub-critical Steam Turbine Unit

Take a domestically-made imported 600MW sub-critical steam turbine unit as an example to carry on the research on steam governing performance of the regulation valve, get the bending stress ratio of the 1st stage blades and turbine's imbalance steam force by calculating, and then confirm the operating safety of the unit under different steam governing arrangements. Through the analysis of the calculation result, the optimization for a unit's steam governing arrangement is presented. The result of the calculation can offer the feasible theory and optimization basis for the valve's governing adjustment, provide some reference for the optimizing steam governing performance of other types of steam turbines.