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field winding 【物理學】(磁)場繞組。

field work

The two - point to earth short fault may cause short currents whic h can lead to serious accident . so it is necessary to monitor the state of field windings of turbo - generator and detect the kind of fault and predict its inclination . thus the security level of power system will be improved 由于發電機轉子兩點接地故障時會產生較大的短路電流,導致惡性事故的發生,因此對發電機轉子繞組進行狀態監測,判斷短路故障的形式和趨勢是十分必要,有助于提高系統安全運行水平。

Because the fault of field windings turn - to - turn shorted do not cause much effect of the operation of the machine or its fault characteristics are not very clear , most of the faults are neglected 轉子匝間短路故障對機組正常運行影響不大或故障特征不明顯,因此許多匝間短路故障被忽略了,但長期運行匝間短路故障會導致轉子線圈一點甚至兩點接地。

In the second part , provided that the operating mode of the turbo generator keeps unchanged when the rotor winding appears fault , the magnetic motive force of the field winding will keep unvaried 通過對發電機磁動勢的分析,得出發電機在故障前后運行工況不發生變化的條件下,勵磁磁動勢將會維持不變的結論。

So far , there has existed several kinds of theory of ground fault protection for field winding of generator . in these methods , pingpong bridge field ground protection is a simple and effective one 目前已有多種原理的發電機勵磁回路接地保護,其中乒乓式勵磁回路接地保護是一種簡單有效的保護原理。

The winding through which a current is passed to produce the primary source of flux in the machine is called the field winding 電流通過其在電機中產生主磁通的繞組稱為勵磁繞組。

Alternator field winding 交流發電機磁場繞