BOILER AUTOMATIC CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a boiler automatic control device suitable to effect pressure control of air or combustion gas suitable for a thermal power generation plant where an inverter is applied on a blower and suitable for control of a motor output. SOLUTION: The boiler automatic control device comprises a means to produce a control command to a flow rate regulating operation end based on proportional integration computation by a control deviation of a pressure of air or combustion gas being an object to be controlled and generate a motor output control command by a program responding to a boiler load; a means to add a bias by a program, corresponding to a boiler load, to a control command to a flow rate control element; and a control means during switching of a motor power source, and a control means during single system operation.