| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 1 | STEAM TURBINE WITH STEAM STORAGE SYSTEM | US15392703 | 2016-12-28 | US20180179915A1 | 2018-06-28 | Julia Maria Kirchner; Theres Cuche; Kevin Morris |
| A steam turbine system including a steam source for generating a steam flow, a high pressure turbine providing a first steam exhaust, a low pressure turbine fluidly coupled to the high pressure turbine, and, a steam storage system having an inlet for receiving a portion of the first steam exhaust from the high pressure steam turbine and storing in the steam storage system, the steam storage system having an output with a pressure relief valve for discharging a second steam exhaust to the low pressure turbine. | ||||||
| 2 | CONTROL METHOD AND CONTROL DEVICE OF STEAM SYSTEM | US12376375 | 2008-02-14 | US20100161136A1 | 2010-06-24 | Kazuko Takeshita; Susumu Kouno; Haruaki Hirayama; Naohiko Ishibashi; Yosuke Nakagawa |
| A steam system control method applied to a steam system including: a low-pressure header storing low-pressure steam; a high-pressure header storing high-pressure header; a steam turbine connected between them; and a turbine bypass line introducing controlled amount of steam from the high-pressure header to the low-pressure header by bypassing the steam turbine. The low-pressure header has a blow-off valve for discharging excessive steam to the outside. The steam system control method includes: a normal time blow-off valve control step of PI controlling the opening of the blow-off valve; and a trip time blow-off control step of controlling the opening of the blow-off valve by changing the MV value to a predetermined trip time opening set value when the turbine is tripped. According to this method, the opening of the blow-off valve is controlled based on the predetermined MV value when the turbine trips and excessive steam flows into the bypass, so that excessive steam flows into the low-pressure header is quickly discharged to the outside. Stable operation can be achieved even when a turbine trips. | ||||||
| 3 | Steam system, control system thereof and control method thereof | US12375780 | 2008-02-14 | US08656718B2 | 2014-02-25 | Kazuko Takeshita; Susumu Kouno; Haruaki Hirayama; Naohiko Ishibashi; Yosuke Nakagawa |
| In a steam system having a turbine driven by steam supplied from a high-pressure header to a low-pressure header, when the pressure in the low-pressure header drops, a turbine bypass valve is opened and the high-pressure side steam is supplied to the low-pressure side header in a normal control. When the turbine is tripped, steam is rapidly flow into the low-pressure side header and its pressure temporally increases. the steam in the low-pressure header is discharged through a discharge valve. After that, if a steam supply from the low-pressure header to another process increases, the discharge valve is closed. After the discharge valve is fully closed, an after-trip control is performed in which the opening of the turbine bypass valve is increased at an earlier timing than the normal control for preventing the steam amount in the low-pressure header to be too small. The control stability of the steam system when the turbine is tripped can be enhanced. | ||||||
| 4 | Control method and control device of steam system | US12376375 | 2008-02-14 | US08620483B2 | 2013-12-31 | Kazuko Takeshita; Susumu Kouno; Haruaki Hirayama; Naohiko Ishibashi; Yosuke Nakagawa |
| A steam system control method applied to a steam system including: a low-pressure header storing low-pressure steam; a high-pressure header storing high-pressure header; a steam turbine connected between them; and a turbine bypass line introducing controlled amount of steam from the high-pressure header to the low-pressure header by bypassing the steam turbine. The low-pressure header has a blow-off valve for discharging excessive steam to the outside. The steam system control method includes: a normal time blow-off valve control step of PI controlling the opening of the blow-off valve; and a trip time blow-off control step of controlling the opening of the blow-off valve by changing the MV value to a predetermined trip time opening set value when the turbine is tripped. According to this method, the opening of the blow-off valve is controlled based on the predetermined MV value when the turbine trips and excessive steam flows into the bypass, so that excessive steam flows into the low-pressure header is quickly discharged to the outside. Stable operation can be achieved even when a turbine trips. | ||||||
| 5 | STEAM SYSTEM, CONTROL SYSTEM THEREOF AND CONTROL METHOD THEREOF | US12375780 | 2008-02-14 | US20090288414A1 | 2009-11-26 | Kazuko Takeshita; Susumu Kouno; Haruaki Hirayama; Naohiko Ishibashi; Yosuke Nakagawa |
| In a steam system having a turbine driven by steam supplied from a high-pressure header to a low-pressure header, when the pressure in the low-pressure header drops, a turbine bypass valve is opened and the high-pressure side steam is supplied to the low-pressure side header in a normal control. When the turbine is tripped, steam is rapidly flow into the low-pressure side header and its pressure temporally increases. the steam in the low-pressure header is discharged through a discharge valve. After that, if a steam supply from the low-pressure header to another process increases, the discharge valve is closed. After the discharge valve is fully closed, an after-trip control is performed in which the opening of the turbine bypass valve is increased at an earlier timing than the normal control for preventing the steam amount in the low-pressure header to be too small. The control stability of the steam system when the turbine is tripped can be enhanced. | ||||||
| 6 | Steam system and the control system and control method thereof | JP2007036825 | 2007-02-16 | JP4616847B2 | 2011-01-19 | 陽介 中川; 晴章 平山; 進 河野; 直彦 石橋; 和子 竹下 |
| 7 | Steam system and system and method for controlling the same | JP2007036825 | 2007-02-16 | JP2008202432A | 2008-09-04 | TAKESHITA KAZUKO; KONO SUSUMU; HIRAYAMA HARUAKI; ISHIBASHI NAOHIKO; NAKAGAWA YOSUKE |
| PROBLEM TO BE SOLVED: To enhance the stability of the control of a steam system when a turbine trips. SOLUTION: In this steam system having the turbine driven by the steam supplied from a high-pressure side header to a low-pressure side header, during the normal control, a turbine bypass valve is opened when the pressure of the low-pressure side header is lowered, and the steam on the high-pressure side is supplied to the low-pressure side header. When the turbine trips, the steam suddenly flows into the low-pressure side header through a bypass, the pressure of the steam is temporarily increased, and the steam on the low-pressure side header is released through a release valve. Then, when the supply of steam from the low-pressure side header to the other process is increased, the release valve is closed. After the release valve is fully closed, a post-trip operation for increasing the opening of the turbine bypass valve at an earlier timing than in the case of normal control is performed so that the steam amount of the low-pressure side header is not excessively reduced. COPYRIGHT: (C)2008,JPO&INPIT | ||||||
| 8 | STEAM SYSTEM, AND ITS CONTROL SYSTEM AND CONTROL METHOD | EP08711296.7 | 2008-02-14 | EP2119879B1 | 2016-09-28 | TAKESHITA, Kazuko; KOUNO, Susumu; HIRAYAMA, Haruaki; ISHIBASHI, Naohiko; NAKAGAWA, Yosuke |
| 9 | STEAM SYSTEM, AND ITS CONTROL SYSTEM AND CONTROL METHOD | EP08711297.5 | 2008-02-14 | EP2060752A1 | 2009-05-20 | TAKESHITA, Kazuko; KOUNO, Susumu; HIRAYAMA, Haruaki; ISHIBASHI, Naohiko; NAKAGAWA, Yosuke |
A steam system control method applied to a steam system including: a low-pressure header storing low-pressure steam; a high-pressure header storing high-pressure header; a steam turbine connected between them; and a turbine bypass line introducing controlled amount of steam from the high-pressure header to the low-pressure header by bypassing the steam turbine. The low-pressure header has a blow-off valve for discharging excessive steam to the outside. The steam system control method includes: a normal time blow-off valve control step of PI controlling the opening of the blow-off valve; and a trip time blow-off control step of controlling the opening of the blow-off valve by changing the MV value to a predetermined trip time opening set value when the turbine is tripped. According to this method, the opening of the blow-off valve is controlled based on the predetermined MV value when the turbine trips and excessive steam flows into the bypass, so that excessive steam flows into the low-pressure header is quickly discharged to the outside. Stable operation can be achieved even when a turbine trips. |
||||||
| 10 | Control method and apparatus of the steam system | JP2007039671 | 2007-02-20 | JP4699401B2 | 2011-06-08 | 陽介 中川; 晴章 平山; 進 河野; 直彦 石橋; 和子 竹下 |
| 11 | Method and device for controlling steam system | JP2007039671 | 2007-02-20 | JP2008202501A | 2008-09-04 | TAKESHITA KAZUKO; KONO SUSUMU; HIRAYAMA HARUAKI; ISHIBASHI NAOHIKO; NAKAGAWA YOSUKE |
| <P>PROBLEM TO BE SOLVED: To provide a method of controlling a steam system capable of stably operating a steam system when a turbine trips. <P>SOLUTION: This method of controlling a steam system is applicable to a steam system having a low-pressure side header for accumulating a low-pressure steam, a high-pressure side header for accumulating a high-pressure steam, a steam turbine connected therebetween, and a turbine bypass line for flowing a controlled amount of steam in the high-pressure side header to the low-pressure side header while bypassing the steam turbine. The low-pressure side header comprises an air release valve for releasing an excess steam to the outside. This method of controlling a steam system comprises a normal air release valve control step for PI-controlling the opening of the air release valve and a trip air release valve control step for controlling the opening of the air release valve by changing an MV value to a specified trip opening set value when the turbine trips. By the method, since the opening of the air release valve is controlled to the specified MV value when the turbine trips and an excess steam flows into the bypass, the excess steam flowing into the low-pressure side header is quickly discharged to the outside. <P>COPYRIGHT: (C)2008,JPO&INPIT | ||||||
| 12 | Pressure control procedure | JP11566382 | 1982-07-02 | JPS595810A | 1984-01-12 | MINAGAWA MASATOSHI |
| PURPOSE:To improve the operating efficiency of steam generator, by controlling a dead zone or a pressure in accordance with a specific condition of absolute pressure variation ratio, in a pressure control procedure for an accumulator. CONSTITUTION:The pressure value PV of accumulator is inputted to a variation ratio computing circuit 10, and the absolute value AV thereof is obtained in an absolute value computing circuit 11. If the absolute value AV exceeds a preset value MS, a selection signal SL1 serves to output the pressure value PV in a selection circuit 16 and does not control a dead zone line. If there is a tendency for the absolute value AV of variation ratio VP to decrease, a selection circuit 18 is switched by means of a selection signal SL2 for thereby outputting a hold value HPV as held in a hold circuit 19 as a control output MV. In this manner, the accumulator can provide an improved pressure controllability for thereby improving the operating efficiency of steam evaporator. | ||||||
| 13 | STEAM TURBINE WITH STEAM STORAGE SYSTEM | EP17205005.6 | 2017-12-01 | EP3346101A1 | 2018-07-11 | KIRCHNER, Julia Maria; CUCHE, Theres; MORRIS, Kevin |
A steam turbine system (14, 200) including a steam source for generating a steam flow, a high-pressure turbine (16, 206) providing a first steam exhaust (208), a low-pressure turbine (18, 210) fluidly coupled to the high-pressure turbine (206), and, a steam storage system (212) having an inlet (216) for receiving a portion (214) of the first steam exhaust (208) from the high-pressure steam turbine (16, 206) and storing in the steam storage system (212), the steam storage system (212) having an output with a pressure relief valve for discharging a second steam exhaust (222) to the low-pressure turbine (18, 210).
|
||||||
| 14 | STEAM SYSTEM, AND ITS CONTROL SYSTEM AND CONTROL METHOD | EP08711297.5 | 2008-02-14 | EP2060752B1 | 2016-10-05 | TAKESHITA, Kazuko; KOUNO, Susumu; HIRAYAMA, Haruaki; ISHIBASHI, Naohiko; NAKAGAWA, Yosuke |
| 15 | STEAM SYSTEM, AND ITS CONTROL SYSTEM AND CONTROL METHOD | EP08711296 | 2008-02-14 | EP2119879A4 | 2010-04-07 | TAKESHITA KAZUKO; KOUNO SUSUMU; HIRAYAMA HARUAKI; ISHIBASHI NAOHIKO; NAKAGAWA YOSUKE |
| 16 | STEAM SYSTEM, AND ITS CONTROL SYSTEM AND CONTROL METHOD | EP08711297 | 2008-02-14 | EP2060752A4 | 2010-04-07 | TAKESHITA KAZUKO; KOUNO SUSUMU; HIRAYAMA HARUAKI; ISHIBASHI NAOHIKO; NAKAGAWA YOSUKE |
| 17 | STEAM SYSTEM, AND ITS CONTROL SYSTEM AND CONTROL METHOD | EP08711296.7 | 2008-02-14 | EP2119879A1 | 2009-11-18 | TAKESHITA, Kazuko; KOUNO, Susumu; HIRAYAMA, Haruaki; ISHIBASHI, Naohiko; NAKAGAWA, Yosuke |
In a steam system having a turbine driven by steam supplied from a high-pressure header to a low-pressure header, when the pressure in the low-pressure header drops, a turbine bypass valve is opened and the high-pressure side steam is supplied to the low-pressure side header in a normal control. When the turbine is tripped, steam is rapidly flow into the low-pressure side header and its pressure temporally increases. the steam in the low-pressure header is discharged through a discharge valve. After that, if a steam supply from the low-pressure header to another process increases, the discharge valve is closed. After the discharge valve is fully closed, an after-trip control is performed in which the opening of the turbine bypass valve is increased at an earlier timing than the normal control for preventing the steam amount in the low-pressure header to be too small. The control stability of the steam system when the turbine is tripped can be enhanced. |
||||||
QQ群二维码
意见反馈
意见反馈