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水轮发电机组是水电站的主要设备之一,规程规定,小型水轮发电机组每2～3年进行一次大修,以便对机组的电气及机械设备进行全面的检查和更换,确保机组能在原设计要求下满负荷运行。 大修后水轮发电机组起动试运行,是为了全面综合鉴定机组检修及安装质量,试验主机与有关电气及机械设备整机动作的正确性,以及自动化元件的可靠性,有时也对某些参数进行测定。 1.起动前的检查 起动前的检查,是试运行最重要的部分,检查的仔细程度是能否保证机组长期正常运行的关键。在这一过程中,应着重检查以下各项: (1)转动部件所有螺母应点焊无开裂,所有止动垫片均已妥善地折角。
Hydroelectric generating set is one of the main equipment of hydropower station, the regulation stipulates that the small hydro-generator set undergoes a major overhaul every 2 to 3 years in order to conduct a complete inspection and replacement of the electrical and mechanical equipment of the generating set so as to ensure that the unit can meet the original design requirements Under full load operation. After the overhaul hydro-generator set to start the trial run, in order to comprehensively identify the unit overhaul and installation quality, test the host and the electrical and mechanical equipment, the correctness of the whole movement, as well as the reliability of automation components, and sometimes some of the parameters Determination. 1. Pre-start inspection Pre-start inspection is the most important part of the trial run, check the degree of detail is the key to ensure long-term normal operation of the unit. In this process, should focus on the following items: (1) rotating parts All nuts should be spot welding without cracking, all the stop washers are properly angled.