湖北省黄龙滩电厂1号机励磁调节器于1988年元月更新,并通过工业调试投运以来,连续多次发现运行不稳定现象。当电力系统外界条件干扰(如单相接地、线路跳闸、大马达起动等),无功有较大幅度波动,发电机端电压不能维持恒定,从额定电压13.8KV缓缓爬升至15KV或缓缓降低至12.7KV,无功也 Huanglongtan power plant in Hubei Province No. 1 machine excitation regulator in January 1988, updated, and put into operation through industrial commissioning, the continuous discovery of unstable phenomena. When the power system external conditions (such as single-phase ground, line trip, motor start, etc.), there is more volatility of reactive power, the generator terminal voltage can not be maintained from the rated voltage of 13.8KV gradually climb to 15KV or slowly Reduce to 12.7KV, reactive also