| 摘要 |
The gas turbine (1) has a compressor (2) with variable inlet guide vanes (6). The gas turbine output power is controlled at least by controlling the variable inlet guide vanes opening. The variable inlet guide vanes opening is controlled between a maximum opening and a minimum opening. A function (F) indicative of the mechanical stress undergone by compressor blades downstream of the variable inlet guide vanes (6) has an increasing line trend (T) from the maximum opening to the minimum opening of the variable inlet guide vanes (6). The function (F) has operating windows (OW1, OW2, OW3) in which the function (F) is smaller than a stress limit (L) and at least one intermediate window (IW1, IW2) between two operating windows (OW1, OW2, OW3), in the intermediate window (IW1, IW2) the function (F) being greater than the stress limit (L). Regulation of the variable inlet guide vanes (6) in the operating windows (OW1, OW2, OW3) is done by opening or closing the variable inlet guide vanes (6) with a given velocity when moving from one operating window (OW1, OW2, OW3) to another operating window (OW1, OW2, OW3) passing through an intermediate window (IW1, IW2). |
