Turbine mechanical output computation device and gas turbine control device equipped therewith
View Patent ↗A turbine mechanical output computation device computes a gas turbine mechanical output P from the following equation P = Pe + J × g × ( 2 π 60 ) 2 × N × ⅆ N ⅆ t where Pe represents a generator effective power measured by a generator effective power wattmeter, N represents the rotational speed of a gas turbine measured by a gas turbine tachometer, J represents the moment of inertia of the gas turbine, and g represents gravitational acceleration. A combustion air amount controller controls the amount of combustion air based on the gas turbine mechanical output P.
1. A turbine mechanical output computation device for computing a mechanical output of a turbine for rotationally driving a generator,
said turbine mechanical output computation device being adapted to compute said mechanical output of said turbine from the following equation
P
=
Pe
+
J
×
g
×
(
2
π
60
)
2
×
N
×
ⅆ
N
ⅆ
t
where Pe represents an output of said generator measured by generator output measuring means, N represents a rotational speed of said turbine measured by turbine rotational speed measuring means, J represents a moment of inertia of said turbine, g represents gravitational acceleration, and dN/dt is a differential of the rotational speed of said turbine.
2. A gas turbine control device, comprising:
a turbine mechanical output computation device for computing a mechanical output of a turbine for rotationally driving a generator;
fuel amount control means for controlling an amount of fuel, which is supplied to a combustor, based on a set load value and said generator output measured by said generator output measuring means; and
combustion air amount control means for controlling an amount of combustion air, which is supplied to said combustor, based on a gas turbine mechanical output computed by said turbine mechanical output computation device; wherein
said turbine mechanical output computation device being adapted to compute said mechanical output of said turbine from the following equation
P
=
Pe
+
J
×
g
×
(
2
π
60
)
2
×
N
×
ⅆ
N
ⅆ
t
where Pe represents an output of said generator measured by generator output measuring means, N represents a rotational speed of said turbine measured by turbine rotational speed measuring means, J represents a moment of inertia of said turbine, g represents gravitational acceleration. and dN/dt is a differential of the rotational speed of said turbine.