CN110067604A - A kind of multiple expansion generator startup stage exhaust conditioning system and method - Google Patents
A kind of multiple expansion generator startup stage exhaust conditioning system and method Download PDFInfo
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- CN110067604A CN110067604A CN201910472037.7A CN201910472037A CN110067604A CN 110067604 A CN110067604 A CN 110067604A CN 201910472037 A CN201910472037 A CN 201910472037A CN 110067604 A CN110067604 A CN 110067604A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000003750 conditioning effect Effects 0.000 title claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 238000010248 power generation Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- 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
- F01D13/00—Combinations of two or more machines or engines
- F01D13/02—Working-fluid interconnection of machines or engines
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of multiple expansion generator startup stage exhaust conditioning system and methods, including high pressure tank and generator, high pressure tank is connected to multiple expansion engine by admission line, multiple expansion engine and generator pass through transmission axis connection, air inlet adjustment valve one and air inlet adjustment valve two are sequentially arranged on admission line, the air inlet of the exhaust outlet access rear class expanding machine of adjacent prime expanding machine in multiple expansion engine, the exhaust outlet of the expanding machine of the last one final stage is discharged into atmosphere, branch pipe is connected to atmosphere to the exhaust outlet tap of chopped-off head expanding machine all the way, exhaust regulating valve is installed on branch pipe.The present invention reduces the acting volumes in multiple expansion engine start-up course, change expanding machine acting energy by adjusting exhaust valve opening, realize in start-up course and be precisely controlled expanding machine revolving speed, prevent hypervelocity accident, improve set grid-connection speed.
Description
Technical field
The invention belongs to expansion power generator air inlets to control equipment technical field, and in particular to a kind of multiple expansion generator opens
Dynamic graduated discharge regulating system and method.
Background technique
Compressed-air energy storage is to start compressed-air energy storage process, consumption electrical energy drive compression in power grid electric surplus
Machine operation, air enter compressed air reservoir after multi-stage compression；When power grid electric is in short supply, start expanding machine power generation process:
Pressure-air in air accumulator enters expanding machine and carries out multiple expansion, driving expanding machine rotation, driven generator power generation.To improve
Efficiency is arranged corresponding heat exchanger and stores to heat, and compression can be absorbed respectively in the stage by releasing in compressed energy-storage stage, expansion
Heat provides swelling heat absorption.
Expansion power generator start-up course includes reaching rated speed, on-load power generation process from stationary state.In the process by
In reservoir pressure height, while expanding machine series is more, in addition connecting pipe and corresponding heat exchanger, do work volume greatly and process
Long, initial start stage be easy to cause adjusting delay length, and the fluctuation of speed is big when special rated speed, and frequency control is difficult when grid-connected, easily
Cause unit hypervelocity accident etc..Therefore a kind of technology is needed, realizes that multiple expansion generator startup stage is precisely controlled revolving speed.
Summary of the invention
The technical problem to be solved by the present invention is provide a kind of multiple expansion generator startup stage exhaust conditioning system and
Method, to solve problems of the prior art.
The technical scheme adopted by the invention is as follows: a kind of multiple expansion generator startup stage exhaust conditioning system, including height
Air accumulator, air inlet adjustment valve one, air inlet adjustment valve two, multiple expansion engine, generator and exhaust regulating valve are pressed, high pressure tank is logical
Cross admission line and be connected to multiple expansion engine, multiple expansion engine and generator by transmission axis connection, air inlet adjustment valve one and into
Gas regulating valve two is sequentially arranged on admission line, and multiple expansion engine point includes chopped-off head expanding machine, middle multi-stage expanding machine and end
Grade expanding machine, the outlet conduit of air inlet adjustment valve two access chopped-off head expanding machine, and the exhaust outlet of chopped-off head expanding machine accesses middle multi-stage
The air inlet of first expanding machine of expanding machine, the exhaust outlet access rear class of adjacent prime expanding machine is swollen in middle multi-stage expanding machine
The air inlet of swollen machine, the exhaust outlet of the last one expanding machine of middle multi-stage expanding machine are connected to the air inlet of final stage expanding machine,
The exhaust outlet of final stage expanding machine is discharged into atmosphere, and branch pipe is connected to atmosphere to the exhaust outlet tap of chopped-off head expanding machine all the way, installs on branch pipe
There is exhaust regulating valve.
Preferably, at least it is connected using an axis between the adjacent expanding machine of above-mentioned multiple expansion engine, final stage expanding machine and hair
Motor passes through transmission axis connection.
Preferably, above-mentioned air inlet adjustment valve one, air inlet adjustment valve two and exhaust regulating valve use electric and pneumatic control.
Preferably, above-mentioned branch diameter is greater than chopped-off head expander exhaust gas pipe diameter.
A kind of adjusting method of multiple expansion generator startup stage exhaust conditioning system, method includes the following steps:
Step 1: standard-sized sheet exhaust regulating valve, air inlet adjustment valve one is put into before unit starting red switch, air inlet adjustment valve is controlled
Pressure is multiple expansion engine rated pressure P after onee；
Step 2: gradually opening air inlet adjustment valve two, expanding machine air inflow, expanding machine red switch since stationary state are promoted
With promote revolving speed, compressed air through branch pipe arranges Xiang great Qi after the acting of chopped-off head expanding machine at this time, at this time because of exhaust regulating valve standard-sized sheet,
Therefore only chopped-off head expanding machine does work, and does work much smaller than all expanding machines, it may be assumed thatW is that expanding machine is defeated
Power out；W1For chopped-off head expanding machine output power；Δh1Enthalpy drop is imported and exported for chopped-off head expanding machine；It is done for all expanding machines
Function, N indicate expanding machine series, and the corresponding output power of two aperture of air inlet adjustment valve is small, realizes the precise controlling of revolving speed；
Step 3: when generating unit speed to 80% rated speed neWhen, it keeps two aperture of air inlet adjustment valve constant, gradually closes
Exhaust regulating valve, compressed air are arranged to the air supply of atmosphere through branch pipe and are gradually decreased after the discharge of chopped-off head expanding machine, flow into
Middle multi-stage expanding machine and the air supply of final stage expanding machine acting gradually increase, and promote multiple expansion engine revolving speed, adjust at this time
Whole output power is only that expanding machine, the acting of chopped-off head expanding machine below are constant, it may be assumed that
For the second level and the expanding machines acting of all grades of back, the corresponding output power of exhaust regulating valve aperture is closed
It is small, realize the precise controlling of revolving speed；
Step 4: promoting expanding machine to rated speed n by closing exhaust regulating valvee, it is then incorporated into power grid tape splicing load,
Continue to close exhaust regulating valve increasing productivity, until controlling air inflow using air inlet adjustment valve two to control expansion after completely closing
Machine starting and operation.
Beneficial effects of the present invention: compared with prior art, the present invention increases row using the pipeline among multiple expansion engine
The branch pipe and exhaust regulating valve of gas control reduce the acting volume in multiple expansion engine start-up course, by adjusting exhaust valve
Aperture changes expanding machine acting energy, realizes in start-up course and is precisely controlled expanding machine revolving speed, prevents hypervelocity accident, mention
High set grid-connection speed.
Detailed description of the invention
Fig. 1 is system diagram of the invention.
Specific embodiment
With reference to the accompanying drawing and the present invention is described further in specific embodiment.
Embodiment 1: as shown in Figure 1, a kind of multiple expansion generator startup stage exhaust conditioning system, including high-pressure gas
Tank 1, air inlet adjustment valve 1, air inlet adjustment valve 23, multiple expansion engine 4, generator 5 and exhaust regulating valve 6, high pressure tank 1
Multiple expansion engine 4, multiple expansion engine 4 and generator 5, which are connected to, by admission line passes through transmission axis connection, air inlet adjustment valve one
2 and air inlet adjustment valve 23 be sequentially arranged on admission line, multiple expansion engine points 4 includes chopped-off head expanding machine 401, middle multi-stage
The outlet conduit of expanding machine 402 and final stage expanding machine 403, air inlet adjustment valve 23 accesses chopped-off head expanding machine 401, chopped-off head expanding machine
401 exhaust outlet accesses the air inlet of first expanding machine of middle multi-stage expanding machine 402, phase in middle multi-stage expanding machine 402
The air inlet of the exhaust outlet access rear class expanding machine of adjacent prime expanding machine, the last one expanding machine of middle multi-stage expanding machine 402
Exhaust outlet be connected to the air inlet of final stage expanding machine 403, the exhaust outlet of final stage expanding machine 403 is discharged into atmosphere, chopped-off head expanding machine
Branch pipe 7 is connected to atmosphere to 401 exhaust outlet tap all the way, is equipped with exhaust regulating valve 6 on branch pipe 7.
Preferably, at least it is connected using an axis between the adjacent expanding machine of above-mentioned multiple expansion engine 4, final stage expanding machine 403
Pass through transmission axis connection with generator 5.
Preferably, above-mentioned air inlet adjustment valve 1, air inlet adjustment valve 23 and exhaust regulating valve 6 use electric and pneumatic control
System.
Preferably, above-mentioned 7 caliber of branch pipe is greater than chopped-off head expander exhaust gas pipe diameter.
When system works, pressure-air is stored in air storage tank, and rate of discharge is by air inlet adjustment valve one, air inlet adjustment
Valve two controls, and enters chopped-off head expanding machine by pipeline and carries out expansion work, exhaust regulating valve is opened at this time, and compressed air is through branch pipe
Drain into atmosphere.
It can be converted into shaft power output, starting for interior in expanding machine using compressed air in the stage that expanding machine power generation, which is released,
Stage includes that rotor drives generator from stationary state red switch to rated speed, being connected to the grid exports two stages of electric energy.
The calculating of single-stage expansion machine output power sees below formula:
W=(hC-ho)×qm=Δ h × qm (1)
In formula: W is expanding machine output power；hCFor expander inlet enthalpy；hoFor expander outlet enthalpy；Δ h is expansion
Machine imports and exports enthalpy drop；qmFor expanding machine mass flow.
The output power of multiple expansion engine is the sum of expanding machine output powers at different levels:
In formula: N is expanding machine series, expanding machine mass flow q at different levelsmIt is constant.
When exhaust regulating valve is opened, compressed air does work heel row to atmosphere through chopped-off head expanding machine, and output power is formula
(1), when exhaust regulating valve is closed, compressed air enters all expanding machine actings of junior, and output power is formula (2).
The relationship of expanding machine output power and revolving speed, torque sees below formula:
W=a × n × T (3)
In formula: W is output power, and a is constant, and n is revolving speed, and T is torque.
When not grid-connected in expanding machine start-up course, constant torque is constant, i.e., output power is directly proportional to revolving speed, output
Power is bigger, and revolving speed is higher.
Therefore, expanding machine revolving speed is finely controlled in startup stage, prevents hypervelocity accident, improve set grid-connection speed
Degree, need to reduce its corresponding output power of air inlet adjustment valve opening.From above formula (1), formula (2) it is known that reduce output work
Rate, multiple expansion engine can reduce difference (the Δ h), expanding machine mass flow (q of expanding machine inlet and outlet enthalpym), or reduce and do
The expander capacity (series) of function.
Embodiment 2: a kind of adjusting method of multiple expansion generator startup stage exhaust conditioning system, this method include with
Lower step:
Before the first step, unit starting red switch, standard-sized sheet exhaust regulating valve, the investment of air inlet adjustment valve one is automatically controlled, and controls mesh
Pressure is multiple expansion engine rated pressure P after being designated as air inlet adjustment valve onee；
It carries out unit red switch step 2: gradually opening air inlet adjustment valve two and controlling air inflow and promotes revolving speed, at this time because of row
Gas regulating valve standard-sized sheet, therefore only chopped-off head expanding machine does work, and does work much smaller than all expanding machines, it may be assumed thatW is expanding machine output power；W1For chopped-off head expanding machine output power；Δh1For chopped-off head expanding machine into
Export enthalpy drop；For the acting of all expanding machines.The corresponding output power of two aperture of air inlet adjustment valve is small, realizes the essence of revolving speed
Thin control；
Step 3: when generating unit speed to 80% rated speed neWhen, it keeps two aperture of air inlet adjustment valve constant, gradually closes
Exhaust regulating valve, compressed air are arranged to the air supply of atmosphere through branch pipe and are gradually decreased after the discharge of chopped-off head expanding machine, flow into
Middle multi-stage expanding machine and the air supply of final stage expanding machine acting gradually increase, and promote multiple expansion engine revolving speed.It adjusts at this time
Whole output power is only that expanding machine, the acting of chopped-off head expanding machine below are constant, it may be assumed that
For the second level and the expanding machines acting of all grades of back.Close the corresponding output power of exhaust regulating valve aperture
It is small, realize the precise controlling of revolving speed.
Step 4: promoting expanding machine to rated speed n by closing exhaust regulating valvee, it is then incorporated into power grid tape splicing load.
Continue to close exhaust regulating valve increasing productivity, until controlling air inflow using air inlet adjustment valve two to control expansion after completely closing
Machine starting and operation.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims lid.
Claims (5)
1. a kind of multiple expansion generator startup stage exhaust conditioning system, it is characterised in that: including high pressure tank (1), into
Gas regulating valve one (2), air inlet adjustment valve two (3), multiple expansion engine (4), generator (5) and exhaust regulating valve (6), high-pressure gas
Tank (1) is connected to multiple expansion engine (4) by admission line, and multiple expansion engine (4) and generator (5) pass through transmission axis connection,
Air inlet adjustment valve one (2) and air inlet adjustment valve two (3) are sequentially arranged on admission line, and multiple expansion engine point (4) includes chopped-off head
Expanding machine (401), middle multi-stage expanding machine (402) and final stage expanding machine (403), the outlet conduit of air inlet adjustment valve two (3) connect
Enter chopped-off head expanding machine (401), first expansion of exhaust outlet access middle multi-stage expanding machine (402) of chopped-off head expanding machine (401)
The air inlet of machine, the air inlet of the exhaust outlet access rear class expanding machine of adjacent prime expanding machine in middle multi-stage expanding machine (402),
The exhaust outlet of the last one expanding machine of middle multi-stage expanding machine (402) is connected to the air inlet of final stage expanding machine (403), final stage
The exhaust outlet of expanding machine (403) is discharged into atmosphere, and branch pipe (7) is connected to atmosphere, branch to the exhaust outlet tap of chopped-off head expanding machine (401) all the way
Exhaust regulating valve (6) are installed on pipe (7).
2. a kind of multiple expansion generator startup stage exhaust conditioning system according to claim 1, it is characterised in that: more
At least it is connected using an axis between the adjacent expanding machine of grade expanding machine (4), final stage expanding machine (403) and generator (5) pass through biography
Moving axis connection.
3. a kind of multiple expansion generator startup stage exhaust conditioning system according to claim 1, it is characterised in that: into
Gas regulating valve one (2), air inlet adjustment valve two (3) and exhaust regulating valve (6) use electric and pneumatic control.
4. a kind of multiple expansion generator startup stage exhaust conditioning system according to claim 1, it is characterised in that: branch
It manages (7) caliber and is greater than chopped-off head expander exhaust gas pipe diameter.
5. a kind of adjusting side of multiple expansion generator startup stage exhaust conditioning system according to claim 1 to 4
Method, it is characterised in that: method includes the following steps:
Step 1: standard-sized sheet exhaust regulating valve, air inlet adjustment valve one is put into before unit starting red switch, after controlling air inlet adjustment valve one
Pressure is multiple expansion engine rated pressure Pe；
Step 2: gradually opening air inlet adjustment valve two, expanding machine air inflow is promoted, expanding machine red switch and is mentioned since stationary state
Revolving speed is risen, compressed air arranges Xiang great Qi through branch pipe after the acting of chopped-off head expanding machine at this time；
Step 3: when generating unit speed to 80% rated speed neWhen, it keeps two aperture of air inlet adjustment valve constant, gradually closes exhaust
Regulating valve, compressed air are arranged to the air supply of atmosphere through branch pipe and are gradually decreased after the discharge of chopped-off head expanding machine, are flowed into intermediate
Multiple expansion engine and the air supply of final stage expanding machine acting gradually increase, and promote multiple expansion engine revolving speed；
Step 4: promoting expanding machine to rated speed n by closing exhaust regulating valvee, it is then incorporated into power grid tape splicing load, is continued
Exhaust regulating valve increasing productivity is closed, until controlling air inflow after completely closing using air inlet adjustment valve two and opening to control expanding machine
Dynamic and operation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910472037.7A CN110067604B (en) | 2019-05-31 | 2019-05-31 | Exhaust regulation system and method for starting stage of multistage expansion generator |
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| CN110067604B CN110067604B (en) | 2024-03-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377270A (en) * | 2020-11-11 | 2021-02-19 | 贵州电网有限责任公司 | Method for rapidly stabilizing rotating speed in impact rotation process of expansion generator set |
| CN112431643A (en) * | 2020-11-11 | 2021-03-02 | 贵州电网有限责任公司 | Method for rapidly stabilizing load shedding self-brought service power rotating speed of expansion generator set |
| CN113006875A (en) * | 2021-03-24 | 2021-06-22 | 佛山玄同科技有限公司 | Pressure energy recovery system and grid connection method |
| CN115199347A (en) * | 2022-07-26 | 2022-10-18 | 北京全四维动力科技有限公司 | Air turbine system and method of operating the same |
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| CN110067604B (en) | 2024-03-26 |
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