CN104295329B - A kind of electricity generation system - Google Patents
A kind of electricity generation system Download PDFInfo
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- CN104295329B CN104295329B CN201410500317.1A CN201410500317A CN104295329B CN 104295329 B CN104295329 B CN 104295329B CN 201410500317 A CN201410500317 A CN 201410500317A CN 104295329 B CN104295329 B CN 104295329B
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Abstract
The present invention discloses a kind of electricity generation system. Described electricity generation system comprises: main steam turbine; The first generator being connected with the output shaft of described main steam turbine; The arrangements for speed regulation that are connected with the output shaft of described the first generator; And the second generator being connected with the output shaft of described arrangements for speed regulation. Adopt electricity generation system provided by the invention, can realize the effective utilization to main generator rear axle surplus power, can effectively avoid the waste to the energy.
Description
The application requires to submit to Patent Office of the People's Republic of China, application number to be on August 28th, 2014201410431577.8, denomination of invention is the priority of the Chinese patent application of " a kind of electricity generation system ", itsFull content is by reference in conjunction with in this application.
Technical field
The present invention relates to actuation techniques field, relate in particular to a kind of electricity generation system.
Background technology
Electric power is the energy using electric energy as power. Invent in 19 century 70s, the invention of electric power andApplication has started industrialization climax for the second time. Since becoming 18th century of human history, the world occur three timesOne of scientific and technological revolution, from then on science and technology has changed people's life. The large-scale electrical power system that 20th century occurredBeing one of most important achievement in the human engineering history of science, is by generating, transmission of electricity, power transformation, distribution and usePower generation and the consume system of the link compositions such as electricity. It fills natural primary energy by mechanical energyPut and change into electric power, then supply power to each user through transmission of electricity, power transformation and distribution. Internet nowEpoch, we still have the demand of sustainable growth to electric power, because we have invented computer, household electrical appliancesDeng the product of more use electric power. What constantly the occurring of undeniable new technology made that electric power becomes people mustEstovers.
At present, generally generated electricity by power plant, then electricity is delivered to electrical network. Generally, main steam turbine drives mainGenerator electricity, accounts for the major part of power plant generated energy.
But in current technology, the power of main steam turbine is very large, while driving main generator, main generatingMachine rear axle still has the power of surplus, causes the waste of the energy.
Summary of the invention
In view of this, the invention provides a kind of electricity generation system, in order to realize main generator rear axle surplus meritEffective utilization of rate, effectively avoids the waste to the energy.
For achieving the above object, the invention provides following technical scheme:
A kind of electricity generation system, comprising:
Main steam turbine;
The first generator being connected with the output shaft of described main steam turbine;
The arrangements for speed regulation that are connected with the output shaft of described the first generator;
And the second generator being connected with the output shaft of described arrangements for speed regulation.
Preferably, the output shaft of described main steam turbine is connected with the power shaft of described the first generator, instituteState the output shaft of the first generator and the power shaft of described arrangements for speed regulation is connected.
Preferably, described arrangements for speed regulation are timing gear roller box.
Preferably, described timing gear roller box is that output speed perseverance is 50 hertz or 60 hertz of power frequency rotating speedsTiming gear roller box.
Preferably, described the second generator is that the electric frequency perseverance sent is 50 hertz or 60 hertzIndustrial frequency generator.
Preferably, described timing gear roller box is that output speed is the timing gear roller box of frequency conversion rotating speed.
Preferably, described the second generator is that the electricity sending is the frequency conversion generator of variable-frequency electric.
Preferably, the main generator that described the first generator is power plant.
Preferably, described the second generator is the small generator that rated power is less than described the first generator.
Preferably, described arrangements for speed regulation are the specified merit that rated power is less than or equal to described the first generatorRate, and be more than or equal to the arrangements for speed regulation of described the second generator rating power.
Preferably, also comprise:
Be arranged between described the first generator and described arrangements for speed regulation, one end and described the first generatorOutput shaft is connected, the clutch that the other end is connected with the power shaft of described arrangements for speed regulation.
Known via above-mentioned technical scheme, compared with prior art, the invention provides a kind of system that generates electricitySystem. Electricity generation system provided by the invention, comprising: main steam turbine, and with the output shaft phase of described main steam turbineThe first generator connecting, with the arrangements for speed regulation that the output shaft of described the first generator is connected, Yi JiyuThe second generator that the output shaft of described arrangements for speed regulation is connected. Because the power of main steam turbine is very large, driveWhen moving main generator, the rear axle of main generator still has the power of surplus, can drive tune provided by the inventionSpeed variator, arrangements for speed regulation further drive second after the rotating speed of main generator rear axle is adjustedMotor rotation, the second generator starts generating, realizes the effective utilization to main generator rear axle surplus power,Can effectively avoid the waste to the energy.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will be to realityThe accompanying drawing of executing required use in example or description of the Prior Art is briefly described, apparently, belowAccompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, notPay under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is the structure chart of electricity generation system in prior art;
The structure chart of a kind of electricity generation system that Fig. 2 provides for the embodiment of the present invention;
The structure chart of another electricity generation system that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried outDescribe clearly and completely, obviously, described embodiment is only the present invention's part embodiment, andNot whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art are not doingGo out the every other embodiment obtaining under creative work prerequisite, all belong to the scope of protection of the invention.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawingWith detailed description of the invention, prior art and the present invention are described in further detail.
Refer to Fig. 1, Fig. 1 is the structure chart of electricity generation system in prior art. As shown in Figure 1, existing skillElectricity generation system in art comprises:
Main steam turbine 11, and the main generator 12 being connected with main steam turbine 11.
Main steam turbine drives main generator electricity, accounts for the major part of power plant generated energy. CurrentIn technology, the power of main steam turbine is very large, and while driving main generator, the rear axle of main generator still has surplusPower, but in current technology, do not still have the power of surplus to utilize to the rear axle of main generator,Cause the waste of the energy, more unfortunate.
For this reason, the invention provides a kind of new electricity generation system, existing to solve in above-mentioned prior artProblem, this problem is mainly reflected in the not rear axle to main generator and still has the power of surplus to utilize,Cause the waste of the energy. Specifically refer to following embodiment.
Embodiment
Refer to Fig. 2, the structure chart of a kind of electricity generation system that Fig. 2 provides for the embodiment of the present invention. As Fig. 2Shown in, the electricity generation system that the embodiment of the present invention provides, comprising:
Main steam turbine 21;
The first generator 22 being connected with the output shaft of described main steam turbine 21;
The arrangements for speed regulation 23 that are connected with the output shaft of described the first generator 22;
And the second generator 24 being connected with the output shaft of described arrangements for speed regulation 23.
Concrete, the electricity generation system that the embodiment of the present invention provides, the output shaft of described main steam turbine 21 and instituteThe power shaft of stating the first generator 22 is connected.
It should be noted that the main generator that described the first generator 22 is power plant.
The generated energy that main steam turbine 21 drives described the first generator 22 to produce is power plant generated energyMajor part. The power of main steam turbine 21 is very large, and while driving main generator, the rear axle of main generator stillHave the power of surplus, the electricity generation system that the embodiment of the present invention provides, is meeting described in main steam turbine 21 drivesWhen the first generator 22 provides most of generated energy for power plant, further utilize main generator rear axleThe surplus power still having, to make full use of the energy, avoids the waste of the energy.
Concrete, the electricity generation system that the embodiment of the present invention provides, described arrangements for speed regulation 23 are timing gear roller box,In order to ensure the invariablenes turning speed of described arrangements for speed regulation 23 output shafts, thereby ensure described the second generator 23Generating frequency stabilization.
Further, described timing gear roller box is that output speed perseverance is 50 hertz or 60 hertz of power frequency rotating speedsTiming gear roller box, be that frequency perseverance is 50 hertz in order to the electricity that drives described the second generator 23 to sendOr the power frequency electricity of 60 hertz, the electric energy that described the second generator 23 is sent enough directly deliver to electrical network orPerson supplies with station service and directly uses.
Concrete, the electricity generation system that the embodiment of the present invention provides, the output shaft of described the first generator 22 withThe power shaft of described arrangements for speed regulation 23 is connected.
Concrete, the electricity generation system that the embodiment of the present invention provides, described the second generator 23 is small power generationMachine.
Further, the rated power of described the second generator 23 is less than the volume of described the first generator 22Determine power.
Further, the electricity generation system that the embodiment of the present invention provides, described the second generator 23 is sent out for power frequencyMotor, the electric frequency perseverance of sending is 50 hertz or 60 hertz, in order to realize described the second generator23 electric energy that send are enough directly delivered to electrical network, or offer station service and directly use.
It should be noted that, described arrangements for speed regulation 23 respectively with described the first generator 22 and described secondGenerator 23 matches, and the rated power of described arrangements for speed regulation 23 meets respectively described the first generator 22The requirement of rated power and described the second generator 23 rated power. Optionally, the embodiment of the present invention providesElectricity generation system, the rated power of described arrangements for speed regulation 23 is less than or equal to described the first generator 22Rated power, the rated power of described arrangements for speed regulation 23 is more than or equal to the volume of described the second generator 23Determine power.
Why arrangements for speed regulation 23 being set between main generator and small generator, is because main generatorRotating speed has slippage, and greatly about 1%～2%, if directly drive small generator, small generator cannotKeep constant generating frequency, small generator electricity cannot directly be delivered to electrical network, can not be directOffering power plant is power plant's power supply.
Slippage refers to poor (frequency difference) of generator voltage frequency and system voltage frequency, when generator connecting in parallel with system,Require slippage should be less than permissible value. But if slippage is too little, the time of generator connecting in parallel with system can be very long,Now suitable acceleration generator, thus slippage improved.
When the frequency of generator and the frequency of system are when inconsistent, will be from trend DEH (DigitalElectricHydraulicControlSystem, digital electro-hydraulic control system) send speedup or reduce-speed sign,The frequency difference of the signal pulse width of sending and generator and system is in the same size, i.e. the frequency of generator and systemPoor larger, the pulse width of increasing, reduce-speed sign is wider; On the contrary, the frequency difference of generator and system is less,The pulse width of increasing, reduce-speed sign is less. And the minimum signal width that DEH receives is 200ms, work asAfter the frequency difference of generator and system is less than certain value, the minimum letter that automatic sub-synchronous device sends to DEHNumber width is the minimum signal width that is less than DEH and can receives, and makes that steam turbine can not increase, turn reducing speed,Make eventually the failure of generator automatic paralleling.
Before generator connecting in parallel with system, make frequency or the rotating speed of frequency or a little higher than system of rotating speed of generator,Make the slippage between generator and system be greater than 0.02Hz (1.2 revs/min), to ensure automatic parallelingThe normal regulating of device to DEH.
Therefore, need between the first generator 22 and the second generator 23, arrangements for speed regulation 23 be set, instituteState arrangements for speed regulation 23 for timing gear roller box, in order to eliminate the slippage of described the first generator 22 output speedsOn the impact of described the second generator 23, make the generating frequency stabilization of the second generator 23, thereby makeTwo generator 23 electricity can directly be delivered to electrical network, and supply with station service use.
Further, the technical scheme that the embodiment of the present invention provides, described arrangements for speed regulation 23 are governor gearCase, this timing gear roller box, optional, be that output speed is the timing gear roller box of frequency conversion rotating speed. Concrete,Output speed is the timing gear roller box of frequency conversion rotating speed, optional, is speed governing epicyclic gearbox, this speed governing rowStar gear-box can carry out stepless rotational speed regulation to output speed.
Further, be that the timing gear roller box of frequency conversion rotating speed is corresponding with above-mentioned output speed, describedTwo generators 24 are that the electricity sending is the frequency conversion generator of variable-frequency electric. Concrete, output speed is that frequency conversion turnsThe timing gear roller box of speed, output speed can stepless rotational speed regulation, therefore, drives frequency conversion generator to sendThe frequency of variable-frequency electric adjustable, thereby can directly drive some station-service equipment in power plant, such as sending outAir-introduced machine, blower fan and the condensate pump of power plant etc. (these station-service equipment are provided with variable-frequency motor), therebyCan reduce the power consumption of power plant self station service, the electric energy that is equivalent to send in power plant is enough more sent intoElectrical network, can increase electricity volume, thereby realizes the raising of economic benefit.
In order to overhaul conveniently, be unlikely to affect the normal operation of the first generator (power plant main generator),The embodiment of the present invention also discloses another electricity generation system.
Refer to Fig. 3, the structure chart of another electricity generation system that Fig. 3 provides for the embodiment of the present invention. AsShown in Fig. 3, this system, comprising:
Main steam turbine 31;
The first generator 32 being connected with the output shaft of described main steam turbine 31;
The clutch 33 being connected with the output shaft of described the first generator 32;
The arrangements for speed regulation 34 that are connected with described clutch 33;
Concrete, described clutch 33 is connected with the power shaft of described arrangements for speed regulation 34.
And the second generator 35 being connected with the output shaft of described arrangements for speed regulation 34.
Concrete, between described the first generator 32 and described arrangements for speed regulation 34, described clutch is set33, in the time that described arrangements for speed regulation 34 or described the second generator 35 break down, with described fromClose the outputting power that device 33 cuts off the output shaft of described the first generator 32, to described arrangements for speed regulation34 or described the second generator 35 keep in repair.
Known via above-mentioned technical scheme, compared with prior art, the invention provides a kind of system that generates electricitySystem. Electricity generation system provided by the invention, comprising: main steam turbine, and with the output shaft phase of described main steam turbineThe first generator connecting, with the arrangements for speed regulation that the output shaft of described the first generator is connected, Yi JiyuThe second generator that the output shaft of described arrangements for speed regulation is connected. Because the power of main steam turbine is very large, driveWhen moving main generator, the rear axle of main generator still has the power of surplus, can drive tune provided by the inventionSpeed variator, arrangements for speed regulation further drive second after the rotating speed of main generator rear axle is adjustedMotor rotation, the second generator starts generating, realizes the effective utilization to main generator rear axle surplus power,Can effectively avoid the waste to the energy.
Meanwhile, electricity generation system provided by the invention, because the power of main steam turbine is very large, drives main generatingWhen machine, the rear axle of main generator still has the power of surplus, can drive arrangements for speed regulation provided by the invention,Arrangements for speed regulation further drive the second generator operation after the rotating speed of main generator rear axle is adjusted,The second generator starts generating, has realized the effective utilization to main generator rear axle surplus power, has improvedThe Integrated using efficiency of the first generator, the electric energy that the second generator sends is enough directly delivered to electrical network, orFor station service directly, or be directly used in and drive the power plant such as air-introduced machine, blower fan and condensate pumpWith equipment, deliver to the electric weight of electrical network (electricity volume) or reduce station service thereby can improve power plantPower consumption, thereby can increase economic efficiency.
Finally, also it should be noted that, in this article, the relational terms such as the first and second gradesOnly be used for an entity or operation and another entity or operating space to separate, and not necessarily requirementOr imply the relation or the order that between these entities or operation, there are any this reality. And, artLanguage " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, therebyThe process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, andAlso comprise other key elements of clearly not listing, or be also included as this process, method, article orThe key element that person's equipment is intrinsic. In the situation that there is no more restrictions, by statement " comprising ... "The key element limiting, and be not precluded within process, method, article or the equipment that comprises described key element and also depositAt other identical element.
In this description, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stressesBe and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field can be realized or useThe present invention. To be aobvious and easy for those skilled in the art to the multiple amendment of these embodimentSee, General Principle as defined herein can be in the situation that not departing from the spirit or scope of the present invention,Realize in other embodiments. Therefore, the present invention will can not be restricted to these embodiment shown in this article,But to meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an electricity generation system, is characterized in that, comprising:
Main steam turbine;
The first generator being connected with the output shaft of described main steam turbine, described the first generator is generatingThe main generator of factory;
The arrangements for speed regulation that are connected with the output shaft of described the first generator;
And the second generator being connected with the output shaft of described arrangements for speed regulation.
2. electricity generation system according to claim 1, is characterized in that, the output of described main steam turbineAxle is connected with the power shaft of described the first generator, the output shaft of described the first generator and described speed governingThe power shaft of device is connected.
3. electricity generation system according to claim 1, is characterized in that, described arrangements for speed regulation are speed governingGear-box.
4. electricity generation system according to claim 3, is characterized in that, described timing gear roller box is defeatedGoing out rotating speed perseverance is the timing gear roller box of 50 hertz or 60 hertz power frequency rotating speeds.
5. electricity generation system according to claim 1, is characterized in that, described the second generator is for sending outThe electric frequency perseverance going out is the industrial frequency generator of 50 hertz or 60 hertz.
6. electricity generation system according to claim 3, is characterized in that, described timing gear roller box is defeatedGoing out rotating speed is the timing gear roller box of frequency conversion rotating speed.
7. electricity generation system according to claim 1, is characterized in that, described the second generator is for sending outThe electricity going out is the frequency conversion generator of variable-frequency electric.
8. electricity generation system according to claim 1, is characterized in that, described the second generator is volumeDetermine the small generator that power is less than described the first generator.
9. electricity generation system according to claim 1, is characterized in that, described arrangements for speed regulation are specifiedPower is less than or equal to the rated power of described the first generator, and is more than or equal to described the second generatorThe arrangements for speed regulation of rated power.
10. electricity generation system according to claim 1, is characterized in that, also comprises:
Be arranged between described the first generator and described arrangements for speed regulation, one end and described the first generatorOutput shaft is connected, the clutch that the other end is connected with the power shaft of described arrangements for speed regulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410500317.1A CN104295329B (en) | 2014-08-28 | 2014-09-26 | A kind of electricity generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410431577.8 | 2014-08-28 | ||
| CN201410431577 | 2014-08-28 | ||
| CN2014104315778 | 2014-08-28 | ||
| CN201410500317.1A CN104295329B (en) | 2014-08-28 | 2014-09-26 | A kind of electricity generation system |
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| CN104295329A CN104295329A (en) | 2015-01-21 |
| CN104295329B true CN104295329B (en) | 2016-05-11 |
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| CN107701244A (en) * | 2017-11-02 | 2018-02-16 | 国电龙源节能技术有限公司 | Steam turbine coaxially drags the system and its combination method of two asynchronous generating units |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204140142U (en) * | 2014-08-28 | 2015-02-04 | 北京联优创展科技有限公司 | A kind of power generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS57116104A (en) * | 1981-01-09 | 1982-07-20 | Toshiba Corp | Steam turbine generating set |
| CN2869331Y (en) * | 2006-01-27 | 2007-02-14 | 沈同银 | Steam turbine condensing-back pressure two-purpose machine |
| CN102384048B (en) * | 2011-07-21 | 2013-04-24 | 中国科学院广州能源研究所 | Low-temperature-difference solar energy and ocean energy combined power generation system |
| CN103397915B (en) * | 2013-08-13 | 2016-03-30 | 中国电力工程顾问集团华东电力设计院有限公司 | The pure condensate formula small turbine drive blower fan system of industrial frequency generator speed governing and method |
| CN103362770B (en) * | 2013-08-13 | 2016-08-10 | 中国电力工程顾问集团华东电力设计院有限公司 | The back pressure type small turbine of industrial frequency generator speed governing drives feed-water pump and method |
| CN103398005B (en) * | 2013-08-13 | 2016-08-10 | 中国电力工程顾问集团华东电力设计院有限公司 | The pure condensate formula small turbine drive feed-water pump of frequency conversion generator speed governing and method |
| CN103397918B (en) * | 2013-08-13 | 2016-03-16 | 中国电力工程顾问集团华东电力设计院有限公司 | The back pressure type small turbine drive blower fan system of frequency conversion generator speed governing and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204140142U (en) * | 2014-08-28 | 2015-02-04 | 北京联优创展科技有限公司 | A kind of power generation system |
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