CN109519230B - Expansion generator conversion fine adjustment system and method - Google Patents
Expansion generator conversion fine adjustment system and method Download PDFInfo
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- CN109519230B CN109519230B CN201910012382.2A CN201910012382A CN109519230B CN 109519230 B CN109519230 B CN 109519230B CN 201910012382 A CN201910012382 A CN 201910012382A CN 109519230 B CN109519230 B CN 109519230B
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- regulating valve
- air inlet
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- air
- branch pipeline
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 title description 3
- 230000001105 regulatory effect Effects 0.000 claims abstract description 66
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000011010 flushing procedure Methods 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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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
- F01D17/10—Final actuators
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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
-
- 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
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a system and a method for converting an expansion generator into fine adjustment, wherein the system comprises a high-pressure air storage tank, an air inlet electric main valve, a first adjusting valve, a second adjusting valve, a third adjusting valve, an air inlet jet device, an expansion machine and a generator, wherein the air inlet electric main valve is arranged on an outlet pipeline of the high-pressure air storage tank; the outlet pipeline behind the electric main air inlet valve is divided into a first branch pipeline and a second branch pipeline, a first regulating valve is arranged on the first branch pipeline, a second regulating valve, an air inlet jet device and a third regulating valve are sequentially arranged on the second branch pipeline in series, the first branch pipeline and the second branch pipeline are connected to the expansion machine after being collected, and the generator is connected with the expansion machine through a transmission shaft. According to the invention, the compressed air entering the expansion generator is converted from high-pressure small flow to low-pressure large flow, so that the fine control of the rotating speed in the starting process of the expansion generator is realized, overspeed accidents are prevented, and the grid-connected speed of the unit is improved.
Description
Technical Field
The invention belongs to the technical field of expansion generator fine adjustment equipment, and particularly relates to an expansion generator fine adjustment system and an expansion generator fine adjustment method.
Background
When the electric quantity of the power grid is excessive, the compressed air energy storage process is started, the electric energy is consumed to drive the compressor to operate, and air enters the compressed air storage tank after being subjected to multistage compression; when the electric quantity of the power grid is short, starting the power generation process of the expander: high-pressure air in the air storage tank enters the expander to carry out multistage expansion, and drives the expander to rotate so as to drive the generator to generate power.
The expansion generator is started to generate power and is divided into two processes, namely, a washing process is started firstly, and the expansion generator enters a load power generation process after reaching the rated rotation speed from a static state. Compressed air is continuously consumed in the two processes, so that the pressure of the air storage tank is gradually reduced, the pressure of the air storage tank is maximum before starting, at the moment, the expansion generator is started in a flushing mode, the opening of the air inlet regulating valve is too small, the rotating speed of the expansion generator is not easy to control, the rotating speed fluctuation is large, the frequency control is difficult during grid connection, overspeed accidents and the like of a unit are easy to cause during rated rotating speed, and the efficiency of the unit is easy to reduce during throttling regulation under high pressure. Therefore, a technology is needed to realize the fine control of the rotating speed when the expansion generator is started and the economy of the unit is considered.
Disclosure of Invention
The invention solves the technical problems that: a system and a method for converting an expansion generator into fine adjustment are provided to solve the technical problems in the prior art.
The technical scheme adopted by the invention is as follows: an expansion generator fine adjustment system comprises a high-pressure air storage tank, an air inlet electric main valve, a first adjusting valve, a second adjusting valve, a third adjusting valve, an air inlet jet device, an expansion machine and a generator, wherein the air inlet electric main valve is arranged on an outlet pipeline of the high-pressure air storage tank; the outlet pipeline behind the electric main air inlet valve is divided into a first branch pipeline and a second branch pipeline, a first regulating valve is arranged on the first branch pipeline, a second regulating valve, an air inlet jet device and a third regulating valve are sequentially arranged on the second branch pipeline in series, the first branch pipeline and the second branch pipeline are connected to the expansion machine after being collected, and the generator is connected with the expansion machine through a transmission shaft.
Preferably, the air inlet jet device comprises a working nozzle, a mixing chamber, a venturi, a diffuser pipe and a pressure stabilizing pipe, wherein the working nozzle is arranged at the left end of the mixing chamber, the right end of the mixing chamber is provided with the venturi, the lower end of the mixing chamber is provided with an air suction port communicated with the outside, the right end of the venturi is provided with the diffuser pipe with small left and big right, and the right end of the diffuser pipe is connected with the pressure stabilizing pipe with a straight cylinder.
Preferably, a metal filter screen with 80-200 meshes is arranged at the air suction port of the air inlet jet device.
Preferably, an inlet flap type check valve is arranged at the air suction port of the air inlet jet device.
Preferably, an outlet flap type check valve is arranged at the air outlet of the air inlet jet device.
A method for regulating an expansion generator to a fine regulation system, the method comprising: when the unit starts to perform the flushing, the electric main valve is fully opened, the regulating valve III is opened to 20%, then the regulating valve II is gradually opened to perform the unit flushing and the rotating speed lifting, and the regulating valve III is opened to control the air inflow after the regulating valve II is opened.
The regulating method of the expansion generator turning fine regulating system includes the steps of after the set rotation speed reaches the rated rotation speed, gradually opening the regulating valve I to carry load, and gradually closing the regulating valve II and the regulating valve III until the regulating valve II and the regulating valve III are closed.
The invention has the beneficial effects that: compared with the prior art, the invention utilizes the entrainment characteristic of the air inlet jet device to ensure that air is sucked into the room to generate vacuum so as to suck the air in the environment, and converts the compressed air entering the expansion generator from high-pressure low-flow into low-pressure high-flow, thereby realizing the fine control of the rotating speed in the starting process of the expansion generator, preventing overspeed accidents and improving the grid-connected speed of the unit.
Drawings
FIG. 1 is a system diagram of the present invention;
fig. 2 is a schematic structural diagram of an intake jet device.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
Example 1: 1-2, an expansion generator conversion fine adjustment system comprises a high-pressure air storage tank 1, an air inlet electric main valve 2, a first adjusting valve 3, a second adjusting valve 4, a third adjusting valve 6, an air inlet jet device 5, an expansion machine 7 and a generator 8, wherein the air inlet electric main valve 2 is arranged on an outlet pipeline of the high-pressure air storage tank 1; the outlet pipeline behind the electric main air inlet valve 2 is divided into a first branch 9 and a second branch 10, the branch point is marked as an A point, a first regulating valve 3 is arranged on the first branch 9 pipeline, a second regulating valve 4, an air inlet jet device 5 and a third regulating valve 6 are sequentially arranged on the second branch 10 pipeline in series, the first branch 9 pipeline and the second branch 10 pipeline are connected to an expander 7 after being converged, the two branch converging points are marked as B points, a generator 8 is connected with the expander 7 through a transmission shaft, the inlet end of the electric main air inlet valve 2 is connected with the outlet end of the compressed air storage tank 1, and the inlet end of the air inlet jet device 5 is connected with the outlet end of the second regulating valve 4.
When the system works, high-pressure air is stored in the air storage tank 1, the outlet flow is regulated by the air inlet electric main valve 2, and the air enters the expander 7 for expansion after passing through the first branch or the second branch, so that the generator 8 is driven to generate electricity.
Preferably, the air intake jet device 5 includes a working nozzle 501, a mixing chamber 502, a throat 503, a diffuser 504 and a pressure stabilizing tube 505, where the working nozzle 501 is installed at the left end of the mixing chamber 502, the right end of the mixing chamber 502 is provided with the throat 503 and the lower end is provided with an air suction port communicated with the outside, the air suction port is provided with an inlet flap type check valve 507, the right end of the throat 503 is provided with the diffuser 504 with small left and large right, the right end of the diffuser 504 is connected with the pressure stabilizing tube 505 with a straight cylinder, and the inner end of the pressure stabilizing tube 505 is provided with an outlet flap type check valve 506.
Preferably, a metal filter screen 508 of 80-200 mesh is arranged at the air suction port of the air intake jet device 5.
Preferably, an inlet flap type check valve 507 is provided at the air inlet of the air intake jet device 5, and air can only enter from outside the device.
Preferably, an outlet flap type check valve 506 is arranged at the air outlet of the air inlet jet device 5, and only the mixed air can be discharged from the device.
The outlet flap type check valve 506 is rotatably connected in the circular air suction port through a rotating shaft, can seal the air suction port after being sealed, the outlet flap type check valve 507 can be fully opened and fully closed, air can only enter from outside the device, when the pressure of the compressed air inlet is low and the jet effect is poor, mixed air flows out from the inlet of the jet device, the outlet flap type check valve 506 can be fully opened and fully closed, only mixed air can be discharged from outside the device, and after the jet device is stopped, external compressed air enters the device from the outlet of the device, so that overpressure is caused.
The air inlet electric main valve 2 has the function of ensuring that an air source is reliably cut off during stopping, only has two states of full opening and full closing, is in a full opening position during starting of the unit, is quickly closed after receiving a stopping signal, and is adjusted by the second regulating valve 4 and the third regulating valve 6.
The first regulating valve 3 is used as a load valve and is in a closed position in the rotating speed regulating stage.
When the unit starts to perform the flushing, the fully-opened air inlet electric main valve 2 is opened to 20% by the third regulating valve 6, then the first regulating valve 4 is gradually opened to perform the unit flushing and the rotating speed is increased, at the moment, because of the entrainment characteristic of the air inlet jet device, the air in the air suction chamber is vacuumized to suck the air in the environment, the compressed air entering the expansion generator is converted into low-pressure large-flow air from the third regulating valve 6 by the high-pressure small-flow air at the second regulating valve 4, the third regulating valve 6 is opened after the second regulating valve 4 is opened to control the air inflow, the fine control of the rotating speed in the starting process of the expansion generator is realized, overspeed accidents are prevented, and the grid-connected speed of the unit is increased.
When the rotating speed of the unit reaches the rated rotating speed, the regulating valve I3 is gradually opened to carry load after the unit is integrated into a power grid, and the regulating valve II 4 and the regulating valve III 6 are gradually closed until the regulating valve II 4 and the regulating valve III 6 are completely closed.
Example 2: a method for regulating an expansion generator to a fine regulation system, the method comprising: when the unit starts to perform the flushing, the fully-opened electric main valve 2 and the regulating valve III 6 are opened to 20%, then the regulating valve II 4 is gradually opened to perform the flushing and the rotating speed lifting of the unit, and the regulating valve III 6 is opened to control the air inflow after the regulating valve II 4 is opened, so that the fine control of the rotating speed in the starting process of the expansion generator is realized.
The regulating method of the expansion generator turning fine regulating system is that after the set rotation speed reaches the rated rotation speed, the regulating valve I is opened to connect with load gradually, and the regulating valve II 4 and the regulating valve III 6 are closed gradually until the regulating valve II 4 and the regulating valve III 6 are closed completely.
The above description is only an example of the embodiment of the present invention, and the scope of the present invention is not limited thereto. Variations and alternatives can be readily ascertained by one skilled in the art within the scope of the present disclosure, which is intended to be within the scope of the present disclosure. For this purpose, the scope of the invention shall be subject to the scope of the claims.
Claims (5)
1. An adjusting method for an expansion generator turning fine adjusting system is characterized by comprising the following steps of: the system comprises a high-pressure air storage tank (1), an air inlet electric main valve (2), a first regulating valve (3), a second regulating valve (4), a third regulating valve (6), an air inlet jet device (5), an expander (7) and a generator (8), wherein the air inlet electric main valve (2) is arranged on an outlet pipeline of the high-pressure air storage tank (1); an outlet pipeline behind the air inlet electric main valve (2) is divided into a first branch pipeline (9) and a second branch pipeline (10), a first regulating valve (3) is arranged on the first branch pipeline (9), a second regulating valve (4), an air inlet jet device (5) and a third regulating valve (6) are sequentially arranged on the second branch pipeline (10) in series, the first branch pipeline (9) and the second branch pipeline (10) are connected to an expansion machine (7) after being collected, and a generator (8) is connected with the expansion machine (7) through a transmission shaft;
the adjusting method comprises the following steps: when the unit starts to perform the flushing, the electric main valve (2) is fully opened, the third regulating valve (6) is opened to 20%, then the second regulating valve (4) is gradually opened to perform the flushing and the rotating speed lifting of the unit, and the third regulating valve (6) is opened to control the air inflow after the second regulating valve (4) is opened; when the rotating speed of the unit reaches the rated rotating speed, the first regulating valve (3) is gradually opened to connect with load, and the second regulating valve (4) and the third regulating valve (6) are gradually closed until the second regulating valve (4) and the third regulating valve (6) are completely closed.
2. The method for adjusting a fine adjustment system for an expansion power generator according to claim 1, wherein: the air inlet jet device (5) comprises a working nozzle (501), a mixing chamber (502), a throat pipe (503), a diffuser pipe (504) and a pressure stabilizing pipe (505), wherein the working nozzle (501) is arranged at the left end of the mixing chamber (502), the throat pipe (503) is arranged at the right end of the mixing chamber (502), an air suction port communicated with the outside is arranged at the lower end of the mixing chamber, the diffuser pipe (504) with small left and large right is arranged at the right end of the throat pipe (503), and the pressure stabilizing pipe (505) with a straight cylinder is connected at the right end of the diffuser pipe (504).
3. The method for adjusting a fine adjustment system for an expansion power generator according to claim 1, wherein: an air inlet jet device (5) is provided with a metal filter screen (508) with 80-200 meshes at the air suction port.
4. The method for adjusting a fine adjustment system for an expansion power generator according to claim 1, wherein: an inlet flap type check valve (507) is arranged at the air suction port of the air inlet jet device (5).
5. The method for adjusting a fine adjustment system for an expansion power generator according to claim 1, wherein: an outlet flap type check valve (506) is arranged at the air outlet of the air inlet jet device (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910012382.2A CN109519230B (en) | 2019-01-07 | 2019-01-07 | Expansion generator conversion fine adjustment system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910012382.2A CN109519230B (en) | 2019-01-07 | 2019-01-07 | Expansion generator conversion fine adjustment system and method |
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| Publication Number | Publication Date |
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| CN109519230A CN109519230A (en) | 2019-03-26 |
| CN109519230B true CN109519230B (en) | 2024-03-26 |
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| CN201910012382.2A Active CN109519230B (en) | 2019-01-07 | 2019-01-07 | Expansion generator conversion fine adjustment system and method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973158A (en) * | 2019-05-09 | 2019-07-05 | 贵州电网有限责任公司 | A kind of expansion power generator combination regulating system and method |
| CN109973161A (en) * | 2019-05-09 | 2019-07-05 | 贵州电网有限责任公司 | A kind of the expansion power generator gas handling system and method for multistage switching |
| CN110224433A (en) * | 2019-06-14 | 2019-09-10 | 贵州电网有限责任公司 | A kind of expansion power generation phase modifier system and method |
| CN110410664A (en) * | 2019-09-03 | 2019-11-05 | 贵州电网有限责任公司 | A kind of compressed-air energy storage combined type gas storage can system and its adjusting method |
| CN112377270B (en) * | 2020-11-11 | 2022-05-17 | 贵州电网有限责任公司 | Method for rapidly stabilizing rotating speed in impact rotation process of expansion generator set |
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2019
- 2019-01-07 CN CN201910012382.2A patent/CN109519230B/en active Active
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| KR20090021807A (en) * | 2007-08-28 | 2009-03-04 | 주식회사 효성 | Fuel cell system having air conditioning function |
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