Ресурсні характеристики валопроводу турбоагрегату К-1000-60/3000 після часткового відновлення ротора

The Ukrainian unified energy system is operated in an extremely difficult condition. A significant share of damaged or inaccessible power units causes a significant shortage of production capacity in the power system. Thus, the decommissioning of a powerful power unit that provides the basic part of the load schedule for long-term overhaul is undesirable. On one of the K-1000-60/3000 LMZ turbo units, the fifth stage of the high-pressure cylinder was damaged. In order to completely restore this damage, it is necessary to involve the production capacities of the manufacturers of this turbine unit, and the repair work will cause a long downtime of the powerful power unit, which covers the basic part of the electrical load schedule. In the article [1], a version of a high-pressure cylinder without working vanes of this degree is proposed. However, in the power industry, there is no experience of operating the power unit K-1000-60/3000 without working blades of one of the stages. Therefore, in this work, a study of the level of metal damage that occurs during the asynchronous inclusion of the turbogenerator in the power system, for a standard shafting and a shafting after restoration. The simulation results showed that asynchronous switching on leads to the appearance of torsional vibrations of the entire shafting. In the case of 30 attempts to connect the turbine generator to the network, damage from torsional vibrations occurs at the level of 2.1 % for the standard shafting and 2 % for the restored shafting.