作者：吴星（华能井冈山电厂，江西 吉安 343009）

摘要：介绍一种简易的发电机铁损试验方法，替代原始复杂的试验方法，即接线简单，而且操作方便。利用两台2000kVA汽机变压器提供励磁电源，由A汽机变低压侧A相用电缆接入发电机定子中间，穿过定子再接到B汽机变低压侧C相，再将A汽机变低压侧C相与B汽机变低压侧A相连起，将两台汽机变的低压侧串接使用；励磁电缆选用185mm2的380V电缆，三相并联使用，不能使用带金属外皮和铠装的电缆；用两台组合仪表、电流、电压表分别测量铁芯损耗及电流、电压值，并用红外热成像仪测量铁芯各部位温度，定子铁心在磁密B=1.18T时试验90min，得到试验数据，经过实际验证，可以实施操作，证实了新方法的可行性。

关键词：发电机；铁损试验；铁芯发热；磁通密度

Abstract: In this paper, we introduce a simple test method for iron damage of generator, which replaces the original complex test method, that is, simple wiring and convenient operation. Two 2000 kVA steam Transformers are used to provide excitation power supply. The A steam engine changes the low-voltage side A phase cable to the middle of the generator stator, passes through the stator, and then connects to the B steam engine to the low-voltage side C phase. Then it connects the C-phase of the A steam engine to the low-voltage side A of the B steam engine and use the low-voltage side of the two steam engines. The excitation cable uses a 185mm2 380V cable, which is used
in three-phase parallel and it cannot use cables with metal skins and armor. The core damage and current and voltage values are measured by two combination meters, current and voltage meters, and the temperature of each part of the core is measured by infrared thermal imager. The stator core tests 90 min when the magnetic density B = 1.18 T, and the test data is obtained. After practical verification, the operation can be carried out and the feasibility of the new method is verified.

Key words: Generator; Iron damage test; Iron core fever; Magnetic flux density

在线预览：大型发电机铁损试验的简易方法

摘自《自动化博览》2019年10月刊