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

• Main Authors: OSAWA HIROYUKI, NAGAI TAKUMA
• Format: Patent
• Language: English; Japanese
• Published: 23.05.2016
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; ELECTRICITY; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINEPLANTS; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NOT OTHERWISE PROVIDED FOR; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; STEAM ACCUMULATORS; STEAM ENGINE PLANTS; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; USE OF WASTE HEAT OF COMBUSTION ENGINES; WEAPONS

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 【課題】ブロワ吐出流量は変動させず且つ他の制御端と干渉なく極間差圧を制御する。【解決手段】燃焼器５２に排燃料ガスを供給する排燃料ガス供給ライン２７ｃと、排燃料ガス供給ライン２７ｃから分岐してＳＯＦＣ１０に排燃料ガスを流通させる再循環ライン２７ｂと、排燃料ガス供給ライン２７ｃの経路上で分岐点より下流かつ燃焼器の上流に設ける第１差圧制御弁３０と、排燃料ガス供給ライン２７ｃが再循環ライン２７ｂに分岐する分岐点より上流側に設ける排燃料ブロワ２９とを備える複合発電システム１であって、ＳＯＦＣ１０の負荷と再循環ライン２７ｂの再循環流量を得るための排燃料ブロワ２９の回転数の情報とを対応付けた第１対応情報を格納しており、第１対応情報とＳＯＦＣ１０の負荷とに基づいて決定される回転数で排燃料ブロワ２９が調整されており、第１差圧制御弁３０を制御して、ＳＯＦＣ１０における極間差圧を制御する。【選択図】図１