大型發電機鐵損試驗的簡易方法
企業: 日期:2019-11-01
領域: 點擊數:316

作者:吳星(華能井岡山電廠,江西 吉安 343009)

摘要:介紹一種簡易的發電機鐵損試驗方法,替代原始復雜的試驗方法,即接線簡單,而且操作方便。利用兩臺2000kVA汽機變壓器提供勵磁電源,由A汽機變低壓側A相用電纜接入發電機定子中間,穿過定子再接到B汽機變低壓側C相,再將A汽機變低壓側C相與B汽機變低壓側A相連起,將兩臺汽機變的低壓側串接使用;勵磁電纜選用185mm2的380V電纜,三相并聯使用,不能使用帶金屬外皮和鎧裝的電纜;用兩臺組合儀表、電流、電壓表分別測量鐵芯損耗及電流、電壓值,并用紅外熱成像儀測量鐵芯各部位溫度,定子鐵心在磁密B=1.18T時試驗90min,得到試驗數據,經過實際驗證,可以實施操作,證實了新方法的可行性。

關鍵詞:發電機;鐵損試驗;鐵芯發熱;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

在線預覽:大型發電機鐵損試驗的簡易方法

摘自《自動化博覽》2019年10月刊

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