Device for preprocessing automatic generating control target load

A device for preprocessing an automatic generating control target load, comprises a signal quality testing loop (I), a high-low limit monitoring and alarming loop (II), a deviation calculating and monitoring and alarming loop (III), a signal holding and receiving loop (VI), a signal abnormity integrated alarming loop (V) and a signal holding and receiving loop (VI). The device can alarm and effectively avoid the impact of the AGC signal abnormity to the set, and also can avoid the frequent change of the load, fuel, water supply, steam temperature and the like of the set due to little fluctuation of the AGC signal, thus having the good effect for improving the running stability of the set, being safe and having obvious economic benefit.