CONTROL DEVICE AND METHOD, AND PROGRAM FOR HYBRID POWER GENERATION SYSTEM, AND HYBRID POWER GENERATION SYSTEM WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To control an inter-electrode differential pressure while preventing a blower discharge flow from being varied and without interference with another control end.SOLUTION: A hybrid power generation system 1 comprises: an exhaust fuel gas supply line 27c for supplying an exhaust fuel gas to a combustor 52; a recirculation line 27b that is branched from the exhaust fuel gas supply line 27c and circulates the exhaust fuel gas to a SOFC 10; a first differential pressure control valve 30 which is provided at a downstream side of a branch point and at an upstream side of the combustor on a route of the exhaust fuel gas supply line 27c; and an exhaust fuel blower 29 which is provided at an upstream side of the branch point where the exhaust fuel gas supply line 27c is branched to the recirculation line 27b. The hybrid power generation system stores first correspondence information which makes a load of the SOFC 10 correspondent to information of a rotation speed of the exhaust fuel blower 29 for obtaining a recirculation flow of the recirculation line 27b. The exhaust fuel blower 29 is controlled at a rotation speed that is determined based on the first correspondence information and the load of the SOFC 10, and the first differential pressure control valve 30 is controlled to control the inter-electrode differential pressure in the SOFC 10.SELECTED DRAWING: Figure 1