电动钻机的发电机保护系统

The Protecting System of Electric Rig's Electric Generator

对电力系统某公司为电动钻机配备的发电机保护系统进行分析，其中包括过电压、欠电压、过频率、欠频率、逆功率和相序等保护措施．每套保护系统都采用集成元件和分离元件混合电路进行检测．如果发生上述一个或几个不正常运行状况，都能产生保护信号，使发电机断路器跳闸，并用灯光报警．有的还使柴油机关闭．有的保护电路还输出调节信号，自动调整驱动系统，使其正常运行．当调整无效时才断电关机．

The paper analyses the protecting system of the electric generator installed in the electric rig.Thesystem includes voltage,over voltage,under voltage,over frequency,under frequency,reverse power,phase sequence etc.Each system is detected by a mixed circuit of integrated components and separate components. Whenone or more of the above mentioned units work in abnormal condition.there will produce signals of protection tomake the electric generator's chopper operate,giving an alarm light or even turn off the diesel engine. Some protecting circuits output regulating signals to adjust the driving system automatically to make it operate normally.When the adjustment becomes invalid,the power will be cut off to stop the machine.