Title :
Research of subharmonic injection schemes for hydro-generator stator ground protection
Author :
Tai, Nengling ; Yin, Xianggen ; Zhang, Zhe ; Chen, Deshu
Author_Institution :
Dept. of Electr. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
Based on the different grounding methods which are probably used in hydro-generators of Three-Gorges Power Plant, the paper presents the comparison results of the protection effects of different subharmonic injection schemes. The different application characteristics by injecting a certain voltage from the generator neutral or its terminals are also described. For obtaining higher sensitivity, the more effective fault contribution current is induced, and the corresponding protection scheme is developed in this paper
Keywords :
earthing; harmonics; hydroelectric generators; machine protection; stators; Three-Gorges Power Plant; equivalent circuits; generator neutral; generator terminals; hydro-generator stator ground protection; induced fault contribution current; protection effects; subharmonic injection; voltage injection; Circuit faults; Current measurement; Equivalent circuits; Grounding; Inductors; Power generation; Power transformer insulation; Protection; Stator windings; Voltage;
Conference_Titel :
Power Engineering Society Winter Meeting, 2000. IEEE
Print_ISBN :
0-7803-5935-6
DOI :
10.1109/PESW.2000.847648
