Method of regulating the rotational speed of a gas turbine during load disconnection
First Claim
1. A method for regulating the rotational speed of a gas turbine during load disconnection, wherein the gas turbine includes a combustion chamber having a plurality of premixing burners, a first group of premixing burners operated as main burners and a second group of premixing burners operated as idling burners, a main fuel line to the combustion chamber having a regulating valve to control a flow of fuel to said plurality of premixing burners, the main line branching into a first branch for the first group and a second branch for the second group, the first branch having a shut-off valve, and wherein a bypass line having regulating means is connected to the main line to bypass the regulating valve, the method comprising the steps, upon load disconnection, of:
- closing the shut-off valve in the first branch;
closing the regulating valve; and
supplying fuel to the idling premixing burners through the bypass line to maintain operation of the idling premixing burners.
4 Assignments
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Accused Products
Abstract
In a method of regulating the rotational speed of a gas turbine during load disconnection, the fuel line (8) of which to the combustion chamber (10) can be controlled via regulating valves (5) and via burner control valves (6), and the combustion chamber of which is operated with premixing burners (11), some of the premixing burners are used as idling premixing burners (11a) and the rest are operated only as main burners. During load disconnection, the main burners are shut off by means of the burner control valve (6), and the idling premixing burners are supplied with fuel via a regulated bypass line (3).
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Citations
5 Claims
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1. A method for regulating the rotational speed of a gas turbine during load disconnection, wherein the gas turbine includes a combustion chamber having a plurality of premixing burners, a first group of premixing burners operated as main burners and a second group of premixing burners operated as idling burners, a main fuel line to the combustion chamber having a regulating valve to control a flow of fuel to said plurality of premixing burners, the main line branching into a first branch for the first group and a second branch for the second group, the first branch having a shut-off valve, and wherein a bypass line having regulating means is connected to the main line to bypass the regulating valve, the method comprising the steps, upon load disconnection, of:
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closing the shut-off valve in the first branch; closing the regulating valve; and supplying fuel to the idling premixing burners through the bypass line to maintain operation of the idling premixing burners. - View Dependent Claims (2, 3, 4, 5)
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Specification