628.沸騰水ループ制御系改良の試みから現実的な階層構成制御方式の提案

原子炉プラント制御系への適用性の示唆

抄録

In order to improve the control of an out of pile boiling water loop for testing fuel, a new type of hierarchical control system was developed. The control method consists of a hierarchical control system which has classical P. I. D. sub-loop controllers at the first level and a standard linear optimal regulator at the second level. The design procedure basically consists of two parts. One part is the formulation of the system model which is obtained from the identification experiments, where the system model is determined with the conventional sub-loop controllers included. The other is the design of 2nd level controllers which are constructed based on the standard technique of the linear optimal regulator applied to the system model. Synthesis and evaluation of the control system design have been tested using computer simulation.
The results of the simulation show that the hierarchical control scheme proposed has performed fairly well in comparison with the conventional one using sub-loop controllers only. We suggest that this control method will be useful for the improvement of the performance of nuclear power plant control and it is attractive because it makes use of conventional controllers and has safety advantages in the case of input-output system failure.