CN113503194B - Full-load deep peak regulation device and method for steam turbine - Google Patents
Full-load deep peak regulation device and method for steam turbine Download PDFInfo
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- CN113503194B CN113503194B CN202110919170.XA CN202110919170A CN113503194B CN 113503194 B CN113503194 B CN 113503194B CN 202110919170 A CN202110919170 A CN 202110919170A CN 113503194 B CN113503194 B CN 113503194B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a full-load deep peak shaving device of a steam turbine, which relates to the technical field of deep peak shaving of a power plant and comprises a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder and a condenser, wherein the condenser is respectively connected with the high-pressure cylinder and the low-pressure cylinder through pipelines, and the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder are sequentially connected through pipelines. The invention provides a deep peak shaving device and a deep peak shaving method for a steam turbine, which can improve the peak shaving capability of a power grid.
Description
Technical Field
The invention relates to the technical field of deep peak shaving of a power plant, in particular to a full-load deep peak shaving device and a full-load deep peak shaving method for a steam turbine.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
At present, renewable energy power needs to be introduced into a power grid in large quantity, so that the load of a thermal power generating unit needs to be reduced. In addition, since the power production of renewable energy is unstable, a high degree of flexibility is required for the load of the thermal power generating unit. In order to meet the requirement, the thermal power generating unit needs to improve the operation flexibility and meet the requirement of deep peak regulation. In the present stage, the method for deeply regulating the peak of the thermal power generating unit generally comprises the steps of reducing the load of the unit, wherein the load of the unit is required to be reduced to 30% in some regions, and the load of a newly-built unit is reduced to 20%. Under the low-load operation of the thermal power generating unit, a plurality of unstable factors exist, the safety is influenced, the efficiency is reduced, and the coal consumption is improved.
The current peak regulation mode cannot achieve full load peak regulation of 100%.
Therefore, the deep peak regulation device and the deep peak regulation method for the steam turbine can improve the peak regulation capacity of a power grid.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a full-load deep peak shaving device and a full-load deep peak shaving method for a steam turbine.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a turbine full load degree of depth peak-shaving device, includes the turbine, and the turbine includes high pressure cylinder, intermediate pressure cylinder, low pressure cylinder and condenser, the condenser passes through the pipeline and is connected with high pressure cylinder and low pressure cylinder respectively, high pressure cylinder, intermediate pressure cylinder and low pressure cylinder connect gradually through the pipeline.
Furthermore, the high-pressure cylinder is connected with the condenser through a vacuum pipeline, and a vacuum valve is arranged on the vacuum pipeline.
Furthermore, the high-pressure cylinder is provided with a first steam inlet pipeline communicated with the outside, and the intermediate pressure cylinder is provided with a second steam inlet pipeline communicated with the outside.
The full-load deep peak shaving mode of the steam turbine utilizes the full-load deep peak shaving device of the steam turbine and adopts a steam turbine temperature standby full-load deep peak shaving mode and/or a steam turbine heat standby full-load deep peak shaving mode.
Furthermore, the full-load deep peak shaving method for the temperature backup of the steam turbine specifically comprises any one of the following methods:
the generator is split, the steam turbine rotates at a certain rotating speed higher than the 1 st order critical rotating speed to realize warm standby operation, and the energy supply of the steam turbine is supplied by an adjacent furnace or an adjacent machine;
furthermore, in the full load deep peak shaving method for turbine temperature backup, the steam source supply method for the turbine includes:
mode A: the high-pressure cylinder receives steam from an adjacent machine, new steam from an adjacent furnace or reheated steam from the adjacent furnace in a downstream mode, the steam passes through the high-pressure cylinder, then sequentially passes through the medium-pressure cylinder and the low-pressure cylinder and then enters the condenser, and low-speed rotation temperature standby driving of the steam turbine is completed;
mode B: the intermediate pressure cylinder receives the steam extracted by an adjacent machine or reheated steam of an adjacent furnace in a downstream mode, the steam enters the condenser through the intermediate pressure cylinder and the low pressure cylinder to complete the low-speed rotation standby driving of the steam turbine, the high pressure cylinder controls the vacuum degree of the high pressure cylinder through the opening degree of the vacuum valve by utilizing a vacuum connecting pipeline leading to the condenser, and the cooling of the high pressure cylinder is completed;
mode C: the intermediate pressure cylinder receives steam extracted by an adjacent machine or reheated steam of an adjacent furnace in a concurrent flow mode, the steam enters the condenser through the intermediate pressure cylinder and the low pressure cylinder to complete low-speed rotation standby driving of the steam turbine, the high pressure cylinder receives cooling steam in a countercurrent mode and discharges the cooling steam from a steam outlet of the high pressure cylinder to complete cooling of the high pressure cylinder.
Furthermore, the full-load deep peak shaving method for the steam turbine hot standby specifically comprises any one of the following methods:
mode 1: the generator is not disconnected, the steam turbine rotates at 3000 r/min, the zero load idles, and a hot standby operation mode is implemented; the energy supply of the steam turbine is supplied by a power grid, and the generator steam turbine rotates at 3000 revolutions per minute;
mode 2: the generator is not disconnected, the steam turbine rotates at 3000 r/min, the lowest load of the steam turbine operates, and a hot standby operation mode is implemented; at the moment, the steam source supply of the steam turbine is supplied by an adjacent furnace or an adjacent machine;
mode 3: the generator is disconnected, and the steam turbine rotates at a high speed at the nth-order critical rotating speed which is lower than 3000 revolutions per minute and higher than approximately 3000 revolutions per minute, so that hot standby operation is realized. At the moment, the steam source supply of the steam turbine is supplied by an adjacent furnace or an adjacent machine;
further, the steam source supply of the steam turbine in the modes 2 and 3 in the hot standby full load deep peak shaving mode of the steam turbine specifically comprises:
mode A: the high-pressure cylinder receives steam from an adjacent machine, new steam from an adjacent furnace or reheated steam from the adjacent furnace in a downstream mode, the steam passes through the high-pressure cylinder, then sequentially passes through the intermediate-pressure cylinder and the low-pressure cylinder, and then enters the condenser, and the hot standby driving of the steam turbine is completed;
mode B: the intermediate pressure cylinder receives steam from an adjacent machine or reheated steam of an adjacent furnace in a downstream mode, the steam enters the condenser through the intermediate pressure cylinder and the low pressure cylinder to complete low-speed rotation standby driving of the steam turbine, the high pressure cylinder controls the vacuum degree of the high pressure cylinder through the opening degree of the vacuum valve by utilizing a vacuum connecting pipeline communicated with the condenser, and cooling of the high pressure cylinder is completed;
mode C: the intermediate pressure cylinder receives the reheat steam from an adjacent turbine or an adjacent furnace in a concurrent flow mode, the steam passes through the intermediate pressure cylinder and then enters the condenser through the low pressure cylinder to complete the low-speed rotation standby driving of the steam turbine, the high pressure cylinder receives the cooling steam in a countercurrent mode, and the steam outlet enters the high pressure cylinder and is discharged from the steam inlet of the high pressure cylinder to complete the cooling of the high pressure cylinder.
Further, in the steam turbine hot standby full load deep peak shaving mode, the cooling mode of the steam turbine in the mode 1 specifically includes:
mode D: the high-pressure cylinder receives cooling steam from an adjacent machine or an adjacent furnace in a downstream mode, the cooling steam is directly discharged into the condenser through a steam outlet of the high-pressure cylinder, the intermediate-pressure cylinder receives the cooling steam from the adjacent machine, and the cooling steam is output into the condenser after passing through the intermediate-pressure cylinder and the low-pressure cylinder;
mode E: the high-pressure cylinder receives cooling steam from an adjacent machine or an adjacent furnace in a countercurrent mode, the cooling steam enters the high-pressure cylinder from a steam outlet of the high-pressure cylinder and is directly discharged into the condenser from a steam inlet of the high-pressure cylinder, the intermediate-pressure cylinder receives the cooling steam from the adjacent machine, and the cooling steam is output into the condenser after passing through the intermediate-pressure cylinder and the low-pressure cylinder;
mode F: the intermediate pressure cylinder receives cooling steam from an adjacent machine, the cooling steam sequentially passes through the intermediate pressure cylinder and the low pressure cylinder and then is output to the condenser, the high pressure cylinder utilizes a vacuum connecting pipeline leading to the condenser, the vacuum degree of the high pressure cylinder is controlled through the opening degree of a vacuum valve, and cooling of the high pressure cylinder is completed.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the deep peak shaving mode for the hot standby of the steam turbine, the power generation load of the steam turbine is zero, and 100% full load deep peak shaving can be realized; or the lowest load or lower load operation of the steam turbine can realize nearly 100 percent full load deep peak regulation, and the steam turbine is in a hot standby state and can quickly turn to a power generation state, so that the flexibility of the unit is improved, the speed of the load of the belt after restarting is improved, the deep peak regulation of the unit is realized, the amplitude of the peak regulation load is improved, and the flexibility is also improved;
by adopting the steam turbine temperature standby deep peak regulation mode, the power generation load of the steam turbine is zero, and 100% full load deep peak regulation can be realized. And the steam turbine is in a warm standby state, so that the steam turbine can be quickly transited to a power generation state, and the flexibility of the unit is improved. Not only the deep peak regulation of the unit is realized, but also the flexibility is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of a full-load deep peak shaving mode A for warm standby of a steam turbine according to the present invention;
FIG. 2 is a schematic structural diagram of a full-load deep peak shaving mode B for warm standby of a steam turbine according to the present invention;
FIG. 3 is a schematic structural diagram of a full load deep peak shaving mode C for steam turbine warm standby according to the present invention;
FIG. 4 is a schematic structural diagram of a full-load deep-peaking mode D for a steam turbine warm standby according to the present invention;
FIG. 5 is a schematic structural diagram of a full load deep peak shaving mode E for warm standby of a steam turbine according to the present invention;
fig. 6 is a schematic structural diagram of a full-load deep peak shaving mode F for turbine warm standby according to the present invention.
In the figure: 1-high pressure cylinder, 2-intermediate pressure cylinder, 3-low pressure cylinder, 4, condenser, 5, vacuum pipeline, 6, vacuum valve, 14-from adjacent machine steam extraction or adjacent furnace new steam or adjacent furnace reheat steam high pressure cylinder inlet pipeline, 15-from adjacent machine steam extraction or adjacent furnace reheat steam intermediate pressure cylinder inlet pipeline, 18, high pressure cylinder cooling steam inlet pipeline, 19, high pressure cylinder cooling steam outlet pipeline, 24-from adjacent machine or adjacent furnace high pressure cylinder cooling steam inlet pipeline, 25-high pressure cylinder cooling steam outlet to condenser pipeline, 26-from adjacent machine intermediate pressure cylinder cooling steam inlet pipeline, 27, low pressure cylinder cooling steam inlet pipeline, 28, low pressure cylinder cooling steam outlet to condenser pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
A full-load depth peak regulation device of a steam turbine comprises a high-pressure cylinder 1, an intermediate-pressure cylinder 2, a low-pressure cylinder 3 and a condenser 4, wherein the condenser 4 is respectively connected with the high-pressure cylinder 1 and the low-pressure cylinder 3 through pipelines, and the high-pressure cylinder 1, the intermediate-pressure cylinder 2 and the low-pressure cylinder 3 are sequentially connected through pipelines; wherein the connecting pipeline of the high pressure cylinder 1 and the condenser 5 is a vacuum pipeline 5, and a vacuum valve 6 is arranged on the vacuum pipeline 5; in other embodiments, the high pressure cylinder 1 is provided with a first steam inlet pipeline communicated with the outside, and the intermediate pressure cylinder 2 is provided with a second steam inlet pipeline communicated with the outside.
A steam turbine energy supply mode comprises a mode A, a mode B and a mode C,
referring to fig. 1, the mode a includes: the steam comes from an inlet pipeline 14 of a high-pressure cylinder for extracting steam from an adjacent machine or new steam from an adjacent furnace or reheat steam from the adjacent furnace, the pipeline is communicated with the high-pressure cylinder 1, the steam sequentially flows through the high-pressure cylinder 1, the intermediate-pressure cylinder 2 and the low-pressure cylinder 3 and enters the condenser 4, and the low-speed rotation temperature standby driving of the steam turbine is completed.
Specifically, the method comprises the following steps: the high-pressure cylinder receives steam from an adjacent turbine, new steam of an adjacent furnace or reheated steam of the adjacent furnace in a downstream mode, the steam passes through the high-pressure cylinder and then sequentially passes through the medium-pressure cylinder and the low-pressure cylinder and then enters the condenser, and low-speed rotation temperature standby driving of the steam turbine is completed.
Referring to fig. 2, approach B, includes: steam flows through the intermediate pressure cylinder 2 and the low pressure cylinder 3 in sequence from an inlet pipeline 15 of a reheat steam high pressure cylinder of an adjacent machine or an adjacent furnace to enter the condenser 4, and low-speed rotation temperature standby driving of the steam turbine is completed. The high-pressure cylinder 1 is cooled by controlling the degree of vacuum of the high-pressure cylinder 1 by the opening degree of a vacuum valve 6 through a vacuum connection line 5 leading to a condenser 4.
Specifically, the method comprises the following steps: the intermediate pressure cylinder receives the steam extracted by the adjacent turbine or reheated steam of the adjacent furnace in a downstream mode, the steam enters the condenser through the intermediate pressure cylinder and the low pressure cylinder to complete the low-speed rotation temperature standby driving of the steam turbine, the high pressure cylinder controls the vacuum degree of the high pressure cylinder through the opening degree of the vacuum valve by utilizing a vacuum connecting pipeline leading to the condenser, and the cooling of the high pressure cylinder is completed.
Referring to fig. 3, the mode C includes: steam flows through the intermediate pressure cylinder 2 and the low pressure cylinder 3 in sequence from an inlet pipeline 15 of a reheat steam high pressure cylinder of an adjacent machine or an adjacent furnace to enter the condenser 4, and low-speed rotation temperature standby driving of the steam turbine is completed.
The high pressure cylinder is connected to the pipe 18 by cooling steam and flows in the high pressure cylinder 1 in a reverse flow manner, thereby cooling the high pressure cylinder 1.
Specifically, the method comprises the following steps: the intermediate pressure cylinder receives the steam extracted by the adjacent machine or reheated steam of the adjacent furnace in a downstream mode, the steam enters the condenser through the intermediate pressure cylinder and the low pressure cylinder to complete the low-speed rotation standby driving of the steam turbine, and the high pressure cylinder receives the cooling steam in a countercurrent mode and discharges the cooling steam from a steam inlet of the high pressure cylinder to complete the cooling of the high pressure cylinder.
A cooling mode of a steam turbine comprises a mode D, a mode E and a mode F,
referring to fig. 4, the mode D includes: a high-pressure cylinder cooling steam inlet pipeline 24 from an adjacent machine or an adjacent furnace, a high-pressure cylinder cooling steam outlet to a condenser pipeline 25, a medium-pressure cylinder cooling steam inlet pipeline 26 from the adjacent machine and a low-pressure cylinder cooling steam inlet pipeline 27; the high-pressure cylinder 1, the intermediate-pressure cylinder 2 and the low-pressure cylinder 3 all adopt a smooth cooling mode, and the high-pressure cylinder 1 is connected with a condenser 4 through a high-pressure cylinder cooling steam outlet to a condenser pipeline 25;
specifically, the method comprises the following steps: the high-pressure cylinder receives cooling steam from an adjacent machine or an adjacent furnace in a concurrent flow mode, the cooling steam is directly discharged into the condenser through a steam outlet of the high-pressure cylinder, the intermediate-pressure cylinder receives the cooling steam from the adjacent machine, and the cooling steam is output into the condenser after passing through the intermediate-pressure cylinder and the low-pressure cylinder.
Referring to fig. 5, the mode E includes: a high-pressure cylinder cooling steam inlet pipeline 24 from an adjacent machine or an adjacent furnace, a medium-pressure cylinder cooling steam inlet pipeline 26 from the adjacent machine, a high-pressure cylinder cooling steam outlet to a condenser pipeline 25, a low-pressure cylinder cooling steam inlet pipeline 27 and a low-pressure cylinder cooling steam outlet to a condenser pipeline 28; the high pressure cylinder 1 adopts counter flow cooling, and the intermediate pressure cylinder 2 and the low pressure cylinder 3 both adopt a concurrent flow cooling mode.
Specifically, the method comprises the following steps: the high-pressure cylinder receives cooling steam from an adjacent machine or an adjacent furnace in a countercurrent mode, the cooling steam is directly discharged into the condenser through a steam inlet of the high-pressure cylinder, the intermediate-pressure cylinder receives the cooling steam from the adjacent machine, and the cooling steam is output into the condenser after passing through the intermediate-pressure cylinder and the low-pressure cylinder.
Referring to fig. 6, the mode F includes: the vacuum pipeline 5 and the vacuum valve 6 between the high-pressure cylinder exhaust steam and the condenser control the vacuum degree of the high-pressure cylinder 1 by controlling the opening degree of the vacuum valve 6, thereby realizing the control of the cooling of the high-pressure cylinder 1;
specifically, the method comprises the following steps: the intermediate pressure cylinder receives cooling steam from an adjacent machine, the cooling steam sequentially passes through the intermediate pressure cylinder and the low pressure cylinder and then is output to the condenser, the high pressure cylinder controls the vacuum degree of the high pressure cylinder through the opening degree of a vacuum valve by utilizing a vacuum connecting pipeline leading to the condenser, and cooling of the high pressure cylinder is completed.
A full load deep peak regulation mode for steam turbine temperature backup specifically comprises the following steps: in the state where the boiler of the unit block is stopped,
the generator is split, the steam turbine rotates at a certain rotating speed higher than the 1 st order critical rotating speed to realize warm standby operation, and the energy supply of the steam turbine is supplied by an adjacent furnace or an adjacent machine; wherein, the energy supply mode of the steam turbine adopts any one of a mode A, a mode B and a mode C;
a full-load deep peak shaving mode for hot standby of a steam turbine comprises any one of the following modes:
in the state where the boiler of the unit block is stopped,
mode 1: the generator is not disconnected, the steam turbine rotates at 3000 r/min, the zero load idles, and a hot standby operation mode is implemented; the energy supply of the steam turbine is supplied by a power grid, and the generator steam turbine rotates at 3000 revolutions per minute;
mode 2: the generator is not disconnected, the steam turbine rotates at 3000 r/min, the lowest load of the steam turbine operates, and a hot standby operation mode is implemented; at the moment, the energy supply of the steam turbine is supplied by an adjacent furnace or an adjacent machine;
mode 3: the generator is disconnected, and the steam turbine rotates at a high speed at the nth-order critical rotating speed which is lower than 3000 revolutions per minute and higher than approximately 3000 revolutions per minute, so that hot standby operation is realized. At the moment, the energy supply of the steam turbine is supplied by an adjacent furnace or an adjacent machine;
wherein the cooling method of the embodiment 1 adopts any one of the above-described embodiments D, E and F,
the steam turbine power supply method in the method 2 and the method 3 includes any one of the method a, the method B, and the method C.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. A full load deep peak shaving mode of a steam turbine is characterized in that a full load deep peak shaving device of the steam turbine is utilized, and a full load deep peak shaving mode of steam turbine hot standby is adopted;
a full-load deep peak regulation device of a steam turbine comprises the steam turbine, wherein the steam turbine comprises a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder and a condenser, the condenser is respectively connected with the high-pressure cylinder and the low-pressure cylinder through pipelines, and the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder are sequentially connected through pipelines; the high-pressure cylinder is connected with the condenser through a vacuum pipeline, and a vacuum valve is arranged on the vacuum pipeline; the high-pressure cylinder is provided with a first steam inlet pipeline communicated with the outside, and the intermediate pressure cylinder is provided with a second steam inlet pipeline communicated with the outside;
the full-load deep peak shaving mode for the hot standby of the steam turbine specifically comprises any one of the following modes:
mode 1: the generator is not disconnected, the steam turbine rotates at 3000 r/min, the zero load idles, and a hot standby operation mode is implemented; the energy supply of the steam turbine is supplied by a power grid, and the generator drives the steam turbine to rotate at 3000 revolutions per minute;
mode 2: the generator is not disconnected, the steam turbine rotates at 3000 r/min, the lowest load of the steam turbine operates, and a hot standby operation mode is implemented; at the moment, the steam source supply of the steam turbine is supplied by an adjacent furnace or an adjacent machine;
mode 3: the generator is split, the steam turbine rotates at high speed at the nth order critical rotating speed which is lower than 3000 r/min and higher than approximately 3000 r/min, the hot standby operation is realized, and the steam source supply of the steam turbine is supplied by an adjacent furnace or an adjacent machine;
the steam source supply mode of the steam turbine of the mode 2 and the mode 3 specifically includes any one of the following:
mode A: the high-pressure cylinder receives steam from an adjacent machine, new steam from an adjacent furnace or reheated steam from the adjacent furnace in a downstream mode, and the steam enters the condenser after passing through the high-pressure cylinder and then sequentially passes through the intermediate-pressure cylinder and the low-pressure cylinder to complete the driving of the steam turbine;
mode B: the intermediate pressure cylinder receives steam from an adjacent machine or reheated steam of an adjacent furnace in a downstream mode, the steam enters the condenser through the intermediate pressure cylinder and then the low pressure cylinder to drive the steam turbine, and the high pressure cylinder controls the vacuum degree of the high pressure cylinder through the opening degree of a vacuum valve by utilizing a vacuum connecting pipeline leading to the condenser to complete cooling of the high pressure cylinder;
mode C: the intermediate pressure cylinder receives steam extracted by an adjacent machine or reheated steam of an adjacent furnace in a concurrent flow mode, the steam passes through the intermediate pressure cylinder and then enters the condenser through the low pressure cylinder to complete the driving of the steam turbine, the high pressure cylinder receives cooling steam in a countercurrent mode and discharges the cooling steam from a steam inlet of the high pressure cylinder to complete the cooling of the high pressure cylinder;
the cooling method of the steam turbine in the mode 1 specifically includes:
mode D: the high-pressure cylinder receives cooling steam from an adjacent machine or an adjacent furnace in a downstream mode, the cooling steam is directly discharged into the condenser through a steam outlet of the high-pressure cylinder, the intermediate-pressure cylinder receives the cooling steam from the adjacent machine, and the cooling steam is output into the condenser after passing through the intermediate-pressure cylinder and the low-pressure cylinder;
mode E: the high-pressure cylinder receives cooling steam from an adjacent machine or an adjacent furnace in a countercurrent mode, the cooling steam enters the high-pressure cylinder from a steam outlet of the high-pressure cylinder and is then discharged into the condenser from a steam inlet, the intermediate pressure cylinder receives the cooling steam from the adjacent machine, and the cooling steam is output into the condenser after passing through the intermediate pressure cylinder and the low-pressure cylinder;
mode F: the intermediate pressure cylinder receives cooling steam from an adjacent machine, the cooling steam sequentially passes through the intermediate pressure cylinder and the low pressure cylinder and then is output to the condenser, the high pressure cylinder utilizes a vacuum connecting pipeline leading to the condenser, the vacuum degree of the high pressure cylinder is controlled through the opening degree of a vacuum valve, and cooling of the high pressure cylinder is completed.
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| CN202110919170.XA CN113503194B (en) | 2021-08-11 | 2021-08-11 | Full-load deep peak regulation device and method for steam turbine |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673101A (en) * | 2016-01-07 | 2016-06-15 | 山西漳泽电力股份有限公司电力技术研究中心 | Turbine with deep peak regulation function and thermodynamic system |
| CN106988795A (en) * | 2017-04-14 | 2017-07-28 | 高文松 | A kind of turbine system |
| CN111042881A (en) * | 2018-10-12 | 2020-04-21 | 上海明华电力技术工程有限公司 | Wide-load high-efficiency steam turbine generator unit with part of cylinders capable of being cut off |
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- 2021-08-11 CN CN202110919170.XA patent/CN113503194B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673101A (en) * | 2016-01-07 | 2016-06-15 | 山西漳泽电力股份有限公司电力技术研究中心 | Turbine with deep peak regulation function and thermodynamic system |
| CN106988795A (en) * | 2017-04-14 | 2017-07-28 | 高文松 | A kind of turbine system |
| CN111042881A (en) * | 2018-10-12 | 2020-04-21 | 上海明华电力技术工程有限公司 | Wide-load high-efficiency steam turbine generator unit with part of cylinders capable of being cut off |
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