| 摘要 |
PURPOSE:To reduce the difference of the controlled variable of a control system and to switch the control system without disturbing a power system by preparing a feedback path which feeds the controlled variable selected by a changeover switch back to a PI arithmetic circuit of an automatic control system and a feedback path which feeds the controlled variable back to a manual control system. CONSTITUTION:The controlled variable selected by a changeover switch 13 is fed back to a manual control system 6 in an automatic control selection state. The system 6 can be initialized so as to be equal to the output Iauto of an automatic control system 8 at all times. As a result, the controlled variable set right after the system 8 is switched to the system 6 is equal to that set right before the switch of both systems. Thus the disturbance due to the switch of both systems 6 and 8 can be reduced. Furthermore the change of the controlled variable set before/after the switch can be reduced in the same way also at selection of the system 6. As a result, the controlled variables before and after the switching of control system are reduced, and both systems 6 and 8 are switched to each other without disturbing a power system. |
