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同步发电机在新安装或大修竣工后,正式投入系统运行前,按现行“部颁”试验标准的规定,都应进行空载特性及三相稳定短路特性试验。做此二项试验的目的,在于检查发电机各参数是否与原设计符合;对检修后的机组,通过此二项试验的特性曲线与历次的特性曲线比较,可作为检查发电机各绕组有无匝间短路存在的参考判据。同时,还可通过特性曲线求出同步发电机的有关参数。采用励磁机励磁的发电机组,做空载特性和三相稳定短路特性试验,方法比较简单,电压(电流)调节也比较容易,一般试验人员(发电厂试验室)都会进行。但对采
Synchronous generators in the new installation or overhaul completed, formally put into operation before the system, according to the current “ministerial” test standards, should be no-load characteristics and three-phase short-circuit characteristics of stable test. The purpose of doing these two tests is to check whether the parameters of the generator are in accordance with the original design. After comparing the characteristic curves of these two tests with the previous characteristic curves of the repaired units, it can be used to check whether the windings of the generators are Reference Criteria for Interturn Short Circuit. At the same time, the relevant parameters of the synchronous generator can also be obtained from the characteristic curve. Exciter excitation using the generator set, no-load characteristics and short-circuit characteristics of three-phase test, the method is relatively simple, voltage (current) regulation is relatively easy, the general test staff (power plant laboratory) will be carried out. But mining