By taking a single temper-are control loop in the thermal manikin as an example, the paper introduced the whole temperature control system, which included the means of improving the precision of temperature measuring through software calibration, the means of suppressing the integration saturation, and the ways of how to restrain the temperature undulation caused by the swi.

The problem of integral saturation occurred in engineering application of PID controller which is most common in the computer control system was analyzed.

This paper discusses the cause and solution of integral saturation in the thermal power plant automatic control system,such as coordinated control system,steam temperature control system and flue gas oxygen content control system.

We successfully solve the problems of integral saturation and derivative mutation with them, moreover, we obtain good effects in developmental Video Codec.