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在水轮机发电机中其转子接地保护是发电机正常运作保护的重中之重。当水轮电机运作正常时,电机转子的回路对于大地有一定的绝缘电阻、和电容分布,发电机的转子结构和冷却方式等条件决定了电机转子的回路对大地的电阻、电容大小。反之,当水轮电机的转子发生转子回路接地故障绝缘损坏时,最为常见的是一点接地。本文针对某单位水轮电机转子接地故障进行保护分析。
In the turbine generator rotor grounding protection is the normal operation of the generator to protect the top priority. When the water wheel motor is operating normally, the circuit of the motor rotor has a certain insulation resistance to the earth, and the capacitance distribution, the rotor structure of the generator and the cooling conditions determine the resistance and capacitance of the motor rotor circuit to the earth. On the other hand, when the rotor of the hydro-motor is damaged due to ground fault of the rotor circuit, the most common one is grounding. In this paper, a unit of hydro-motor rotor ground fault protection analysis.