石景山发电总厂所属的官厅、下马岭以及下苇甸三个水电站,多年来一直实行集中检修,检修计划统一安排。检修时集中各站人员统一指挥进行。我们从一九七九年开始,对各站设备进行细致地调查摸底、分析研究。根据设备情况,试探性地延长检修间隔。水轮发电机组大修间隔一般为6年,小修每年2次,每次3～5天。主变压器大修间隔一般为15年,小修每年2次 Shijingshan Power Plant belongs to the Guanting, Xiamaling and Xiandian three hydropower stations, over the years has been the implementation of centralized maintenance, maintenance plan unified arrangements. Overhaul focus on the station staff unified command. Starting from 1979, we conducted a thorough investigation and analysis of each station’s equipment. According to equipment, tentatively extend the inspection interval. Hydrogenerator overhaul interval is generally 6 years, minor repair 2 times a year, each 3 to 5 days. The main transformer overhaul interval is generally 15 years, minor repair 2 times a year