公开(公告)号：JPH08218898A

公开(公告)日：1996-08-27

申请号：JP33183895

申请日：1995-12-20

Applicant: ABB MANAGEMENT AG

Inventor： PEETAA KANBAA ,  ANDERUSU RINDOBUARU ,  PEETAA RUFURI

IPC: F01D21/00 ,  F02C6/00 ,  F02C9/20 ,  F02C9/22 ,  F02C9/28 ,  F02C9/48 ,  F02K3/08

Abstract: PROBLEM TO BE SOLVED: To provide the unharmful absorption of an excessive temperature increase following the effect of adjustment by changing the entire load reduction of a gas-turbine group with maximum load efficiency, the group being run by a sequential combustion system, and by means of entrance temperature interference in both turbines during load reduction introduction. SOLUTION: At the time of partial load running, an entrance temperature into both turbines, i.e., a HP(high pressure) turbine 6 and a LP(low pressure) turbine 10, is reduced to 5% of a rated load. Then, the guiding blade of a compressor 1 is adjusted until a load is below 50%, and the entrance temperature into the HP turbine 6 is kept constant during the adjustment of the guiding blade of the compressor 1. In this case, the entrance temperature into the LP turbine 10 is lowered so as to prevent the exit temperature of the LP turbine 10 from exceeding a designed rated value. After the adjustment of the guiding blade of the compressor 1, the entrance temperature into both turbines 6 and 10 is lowered first in the LP turbine 10, and then in the HP turbine 6 by shifting a phase. Thus, NOx , and CO emission is reduced to a minimum.