IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0667991
(2008-09-03)
|
등록번호 |
US-8386147
(2013-02-26)
|
우선권정보 |
JP-2007-228451 (2007-09-04) |
국제출원번호 |
PCT/JP2008/065805
(2008-09-03)
|
§371/§102 date |
20100302
(20100302)
|
국제공개번호 |
WO2009/031552
(2009-03-12)
|
발명자
/ 주소 |
- Tanaka, Satoshi
- Harada, Shoichi
|
출원인 / 주소 |
- Mitsubishi Heavy Industries, Ltd.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
In a heating apparatus for heating the air sucked into a gas turbine by a heat exchanger, the temperature fluctuation of the heated air is suppressed even in the period, for which a steam source to be fed to the heat exchanger is changed. For suppression, a heat exchanger is fed with both a self-can
In a heating apparatus for heating the air sucked into a gas turbine by a heat exchanger, the temperature fluctuation of the heated air is suppressed even in the period, for which a steam source to be fed to the heat exchanger is changed. For suppression, a heat exchanger is fed with both a self-can steam, the feed rate of which is controlled by a self-can steam control valve, and the auxiliary-steam, the feed rate of which is controlled by an auxiliary-steam control valve. At starting time, the quantity of the auxiliary-steam is reduced at a constant rate, and that of the self-can steam is increased while a feedback control and a feedforward control are being made. At stopping time, the quantity of the self-can steam is reduced at a constant rate, and that of the auxiliary-steam is increased while the feedback control and the feedforward control are being made.
대표청구항
▼
1. An apparatus for controlling intake air heating of a gas turbine comprising: a heat exchanger which is supplied with self-generated steam whose supply amount is controlled in response to a valve opening of a self-generated steam control valve and auxiliary steam whose supply amount is controlled
1. An apparatus for controlling intake air heating of a gas turbine comprising: a heat exchanger which is supplied with self-generated steam whose supply amount is controlled in response to a valve opening of a self-generated steam control valve and auxiliary steam whose supply amount is controlled in response to a valve opening of an auxiliary steam control valve to heat air which is taken by a gas turbine utilizing supplied steam;a thermometer which measures the temperature of air which is heated by the heat exchanger and taken by the gas turbine;a steam source switching signal generating unit which outputs a first steam source switching signal when output of a generator rotationally driven by the gas turbine decreases from a value equal to or higher than a predetermined prescribed value to a value less than the prescribed value and which outputs a second steam source switching signal when the output of the generator increases from a value less than the predetermined prescribed value to a value equal to or higher than the prescribed value; a self-generated steam usage coefficient generating unit which outputs a self-generated steam usage coefficient whose value gradually changes from 1 to 0 along time elapsing in a predetermined set time when the first steam source switching signal is outputted and whose value gradually changes from 0 to 1 along time elapsing in a predetermined set time when the second steam source switching signal is outputted; a self-generated steam control unit which feeds a self-generated steam correction valve opening instruction obtained by adding a self-generated steam valve opening correction instruction for performing feedback control so as to make a deviation between a measurement temperature measured by the thermometer and a preset target temperature zero and a self-generated steam valve opening preceding instruction for performing preceding control such that the measurement temperature reaches the target temperature to the self-generated steam control valve, thereby controlling a valve opening of the self-generated steam control valve; andan auxiliary steam control unit which feeds an auxiliary steam correction valve opening instruction obtained by adding an auxiliary steam valve opening correction instruction for performing feedback control so as to make a deviation between the measurement temperature and the preset target temperature zero and an auxiliary steam valve opening preceding instruction for performing preceding control such that the measurement temperature reaches the target temperature to the auxiliary steam control valve, thereby, controlling a valve opening of the auxiliary steam control valve, whereinwhen the first steam source switching signal is outputted, the self-generated steam control unit maintains a value of the self-generated steam correction valve opening instruction at a time point when the first steam source switching signal is outputted and gradually decreases the value of the self-generated steam correction valve opening instruction from a held value of the self-generated steam correction valve opening instruction to zero in a predetermined set time, while the auxiliary steam control unit controls a valve opening of the auxiliary steam control valve according to an auxiliary steam adjustment valve opening instruction obtained by multiplying the auxiliary steam correction valve opening instruction by a difference value obtained from subtracting the self-generating steam usage coefficient from a value of 1, andwhen the second steam source switching signal is outputted, the auxiliary steam control unit maintains a value of the auxiliary steam correction valve opening instruction at a time point when the second steam source switching signal is outputted and gradually decreases the value of the auxiliary steam correction valve opening instruction from the held value of the self-generated steam correction valve opening instruction to 0 in a predetermined set time, while the self-generated steam control unit controls a valve opening of the self-generated steam control valve according to a self-generated steam adjustment valve opening instruction obtained by multiplying the self-generated steam correction valve opening instruction by the self-generated steam usage coefficient. 2. The apparatus for controlling intake air heating of a gas turbine according to claim 1, wherein the self-generated steam control unit comprises:a deviation calculating unit for self-generated steam which obtains a deviation temperature for self-generated steam which is the deviation between the target temperature and the measurement temperature;a proportional-integral calculating unit for self-generated steam which performs proportional-integral calculation of the deviation temperature for self-generated steam to obtain a valve opening correction instruction for self-generated steam;a second deviation calculating unit for self-generated steam which obtains a temperature difference between the target temperature and an atmospheric temperature;a valve opening instruction calculation function unit for self-generated steam which outputs a valve opening instruction for self-generated steam whose value becomes large when a rotation number of the gas turbine increases;an inlet guide vane correction coefficient calculation function unit for self-generated steam which outputs an inlet guide vane correction coefficient for self-generated steam whose coefficient value becomes large when an opening of an inlet guide vane of the gas turbine increases;a temperature difference correction coefficient calculation function unit for self-generated steam which outputs a temperature difference correction coefficient for self-generated steam whose coefficient value becomes large when the temperature difference increases;a steam pressure correction coefficient calculation function unit for self-generated steam which outputs a steam pressure correction coefficient for self-generated steam whose coefficient value becomes 1 when a pressure of self-generated steam supplied to the heat exchanger is equal to a predetermined reference pressure, whose coefficient value becomes smaller than 1 when the pressure becomes larger than the reference pressure, and whose coefficient value becomes larger than 1 when the pressure becomes smaller than the reference pressure;a steam temperature correction coefficient calculation function unit for self-generated steam which outputs a steam temperature correction coefficient for self-generated steam whose coefficient value becomes 1 when a temperature of self-generated steam supplied to the heat exchanger is equal to a predetermined reference temperature, whose coefficient value becomes smaller than 1 when the temperature becomes larger than the reference temperature, and whose coefficient value becomes larger than 1 when the temperature becomes smaller than the reference temperature;a multiplying unit for self-generated steam which performs multiplication of the valve opening instruction for self-generated steam, the inlet guide vane correction coefficient for self-generated steam, the temperature difference correction coefficient for self-generated steam, the steam pressure correction coefficient for self-generated steam, and the steam temperature correction coefficient for self-generated steam to output a valve opening preceding instruction for self-generated steam; andan adding unit for self-generated steam which adds the valve opening correction instruction for self-generated steam and the valve opening preceding instruction for self-generated steam to output a correction valve opening instruction for self-generated steam, andthe auxiliary steam control unit comprises:a deviation calculating unit for auxiliary steam which obtains a deviation temperature for auxiliary steam which is the deviation between the target temperature and the measurement temperature;a proportional-integral calculating unit for auxiliary steam which performs proportional-integral calculation of the deviation temperature for auxiliary steam to obtain a valve opening correction instruction for auxiliary steam;a second deviation calculating unit for auxiliary steam which obtains a temperature difference between the target temperature and an atmospheric temperature;a valve opening instruction calculation function unit for auxiliary steam which outputs a valve opening instruction for auxiliary steam whose value becomes large when the rotation number of the gas turbine increases;an inlet guide vane correction coefficient calculation function unit for auxiliary steam which outputs an inlet guide vane correction coefficient for auxiliary steam whose coefficient value becomes large when the opening of the inlet guide vane of the gas turbine increases;a correction coefficient calculation function unit for auxiliary steam temperature difference which outputs a temperature difference correction coefficient for auxiliary steam whose coefficient value becomes large when the temperature difference becomes large;a steam pressure correction coefficient calculation function unit for auxiliary steam which outputs a steam pressure correction coefficient for auxiliary steam whose coefficient value becomes 1 when a pressure of auxiliary steam supplied to the heat exchanger is equal to a predetermined reference pressure, whose coefficient value becomes smaller than 1 when the pressure becomes larger than the reference pressure, and whose coefficient value becomes larger than 1 when the pressure becomes smaller than the reference pressure;a steam temperature correction coefficient calculation function unit for auxiliary steam which outputs a steam temperature correction coefficient for auxiliary steam whose coefficient value becomes 1 when a temperature of auxiliary steam supplied to the heat exchanger is equal to a predetermined reference temperature, whose coefficient value becomes smaller than 1 when the temperature becomes larger than the reference temperature, and whose coefficient value becomes larger than 1 when the temperature becomes smaller than the reference temperature;a multiplying unit for auxiliary steam which performs multiplication of the valve opening instruction for auxiliary steam, the inlet guide vane correction coefficient for auxiliary steam, the temperature difference correction coefficient for auxiliary steam, the steam pressure correction coefficient for auxiliary steam, and the steam temperature correction coefficient for auxiliary steam to output a valve opening preceding instruction for auxiliary steam; andan adding unit for auxiliary steam which adds the valve opening correction instruction for auxiliary steam and the valve opening preceding instruction for auxiliary steam to output a correction valve opening instruction for auxiliary steam.
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