| 主权项 |
1. A method for operating a gas turbine below its rated power, comprising:
determining a lower power limit value (p1) for the gas turbine as that power limit value beyond which further lowering of the output gas turbine power leads to departure from a partial load range of the gas turbine in accordance with CO emissions limits, preparing a predefined limit value (p2) for an output gas turbine power, wherein the predefined limit value (p2) is smaller than the rated power of the gas turbine, operating the gas turbine with an output gas turbine power above the predefined limit value (p2) with a constant averaged exhaust gas temperature, or a control variable calculated therefrom, lowering the output gas turbine power,
wherein in order to lower the output gas turbine power the inlet guide vanes of a compressor of the gas turbine are closed further, andwherein, if the output gas turbine power drops below the predefined limit value (p2), the exhaust gas temperature of the gas turbine continues to be raised, as the gas turbine power continues to be lowered, up to a maximum exhaust gas temperature, and wherein the predefined limit value (p2) is chosen such that the temperature rises extend over as large as possible a partial load range of the gas turbine in accordance with CO emissions limits. |
