Unipro PJSC Shaturskaya GRES Branch has summed up interim results of the maintenance program. In accordance with the approved schedule, the Branch is planning to carry out overhauls of Power Units Nos. 2 and 5 and current repairs of Power Units Nos. 1, 3, 4, 6, and 7 in 2020.
To date, the Branch has completed the overhaul of 210 MW Power Unit No. 5. Overhaul operations involved the opening of the turbine and technical diagnostics. Within the framework of the campaign, the Branch has repaired the boiler (TN 104), force-draft mechanisms, and air preheaters at the power unit. In addition, the branch has carried out an overhaul of the generator involving replacement of the culvert and transformers (5T, 25T). All activities were conducted with due regard for the findings of industrial safety expert review.
Power Units Nos. 1, 4, 6 and Power Unit No. 7 CCGT-400 have been subjected to standard current repairs. All operations have been completed in time according to the annual equipment maintenance schedule. The power engineers are about to complete the current repairs of Power Unit No. 3 and embark upon the overhaul of Power Unit No. 2. The branch has replaced over 230 porcelain cylindrical post insulators with polymer insulators on Sections 1 and 2 of 220 kV outdoor type open air insulated switchgears (AIS). These activities are performed in accordance with the schedule approved by MosRDO. Polymer insulators are characterized by high reliability and resistance to physical and environmental impacts. Pursuant to the requirements of federal regulations FNP “Industrial Safety Rules for Oil and Petroleum Products Warehouses and findings of industrial safety expert review, the power engineers are repairing fuel oil reservoir No. 7 with a capacity of 20,000 m3.
By early October, the Branch will complete similar works at fuel oil reservoir No. 8 with an identical capacity of 20,000 m3. To improve the quality of heat supply to Shatura residents, the maintenance campaign included reinstallation of a pipeline section on trunk heating network No. 3 that has been duly completed. Currently, repairs of the heat network on Shkolnaya Street and Sovetskaya Street are continuously in progress. Maintenance operations have been carried out for a year and will be completed by November 2020.