CN103997277B - A kind of frequency conversion system for thermal power plant - Google Patents
A kind of frequency conversion system for thermal power plant Download PDFInfo
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- CN103997277B CN103997277B CN201410202723.XA CN201410202723A CN103997277B CN 103997277 B CN103997277 B CN 103997277B CN 201410202723 A CN201410202723 A CN 201410202723A CN 103997277 B CN103997277 B CN 103997277B
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- frequency
- frequency conversion
- bus
- power
- subsidiary engine
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a kind of Novel variable-frequency system for thermal power plant, and it comprises at least the adjustable steam turbine of rotating speed, feed pump, generator and change gear box, frequency conversion bus and coupled subsidiary engine；As unit load changes, into the amount of drawing gas and parameter the meeting respective change of the steam turbine, the turbine speed synchronously change, so that the frequency of on the one hand change speed of feedwater, the on the one hand alternating current that change generator exports.The present invention is not required to additionally set the frequency converter of other patterns, simple system；Overcome because of relevant issues caused by the frequency converter using other patterns, reliability is high, takes up an area less.
Description
Technical field
The present invention relates to a kind of frequency conversion system, more particularly to a kind of frequency conversion system for thermal power plant.
Background technology
In the production process in thermal power plant, water is heated in the boiler becomes steam, then utilizes Steam Actuation steamer
Machine rotates, and drives generator rotation, the chemical energy of fuel is ultimately converted into electric energy.During generating, thermal power plant
The rotation subsidiary engine such as a large amount of Pumps ＆ Fans being equipped with needs to consume a large amount of electric energy.Current common practices be by house transformer,
Electricity is drawn into a part to use for station-service subsidiary engine.
Thermal power plant typically chooses the capacity of subsidiary engine in engineering design by greatest requirements and plus certain surplus, because
And the subsidiary engine in actual motion has larger allowance.And when the subsidiary engine of constant speed operation is not run, particularly under full capacity
In underrun, its operating efficiency can drastically decline, and this causes the serious waste of electric energy.If using frequency control skill
It art, then can make the operating point of subsidiary engine as close to high efficient district, and reduce the throttling damage of blower fan baffle plate, valve to greatest extent
Lose, substantially reduce energy consumption during equipment operation, the service life of extension device.By taking blower fan as an example, according to fluid mechanics principle, axle
Power is directly proportional to the cube of rotating speed.When institute's required airflow is reduced, and rotation speed of fan reduces, its power is by under the cube of rotating speed
Drop.Therefore, the energy-saving effect of variable-speed operation is considerable.
Variable-frequency control technique is current energy-saving and emission-reduction, improves technological process to improve product quality and improve environment, promotion
A kind of important means of technological progress.Frequency control with its excellent speed governing and rise a braking ability, high efficiency, high power factor and
The advantages that power savings and be known as most promising mode of speed regulation both at home and abroad.Power plant is mainly become by installing additional at present
Frequency device changes water pump or blower motor frequency to reach, and so as to change the rotating speed of water pump or blower fan, improves its operational efficiency,
Reach energy-saving and emission-reduction purpose.
Present conversion system mainly has controllable silicon frequency conversion, coupling fluid-structure frequency conversion and magnetic couple frequency conversion.In these three frequency conversions
In mode, coupling fluid-structure frequency-converter power is big, and reliability is low, cost is low, and its efficiency is directly proportional to the first power of rotating speed, degree of regulation
It is low.Magnetic couple frequency conversion reliability is high, cost highest, its efficiency and rotating speed it is square directly proportional, when rotating speed is low, efficiency
Low, additionally mounted magnetic couple device needs to change the installation site of motor either equipment, removes original foundation of civil work.Can
Silicon conversion efficiency highest is controlled, and its efficiency is not influenceed by load change, responds most fast, degree of regulation highest.At these three
In conversion method, controllable silicon frequency conversion cost is placed in the middle.From the point of view of cost and efficiency, the more use in thermal power plant is controllable
Silicon converter technique.
Because thermal power plant requires higher, used rotating machinery to equipment dependability, such as water circulating pump, pressure fan
Big Deng plant capacity, voltage class is high, thus to requiring also high for the frequency converter of firepower electrical plant.At present employed in power plant
Frequency conversion equipment mainly uses controllable silicon technology, and the disadvantage of controllable silicon converter technique is that voltage class is higher, and its equipment can
It is lower by property, and frequency conversion equipment floor space is big, and its frequency-conversion harmonic all has an impact to power network and motor.Therefore, in firepower
The popularization and application of controllable silicon converter technique are slower in power plant.With the development of technology, having portioned product at present can be compared with
Solve the above problems well, but because these product prices are high, hinder its further genralrlization.
Therefore, this invention address that developing a kind of low cost, high reliability, high efficiency, simple and easy frequency conversion system.
The content of the invention
In view of the drawbacks described above of prior art, it is an object of the invention to provide a kind of cost is relatively low, high reliability, efficiently
The relatively simple frequency conversion system of rate, system.
A kind of frequency conversion system provided by the invention comprises at least feed pump, feed pump turbine, change gear box, generating
Machine, it is frequency conversion bus, the subsidiary engine being connected on frequency conversion bus that frequency conversion generator assembles set.
A kind of frequency conversion system provided by the invention, its general principle are：Using the adjustable feed pump turbine of rotating speed, driving
Dynamic feed pump simultaneously, promotes a generator, changed according to unit load, and the synchronization of feed pump turbine changes, so as to
Change the frequency of the alternating current of generator output, all electric motor of auxiliary machines being connected thereto are changed by frequency conversion bus
Supply frequency, the final rotating speed for changing subsidiary engine and rotating machinery.
Because the speed adjusting technique of feed pump turbine has developed very perfect, the speed governing that wide scope can be achieved is even whole
Speed governing, therefore the frequency converter of other patterns need not can be set, but utilize feed pump turbine to drive generator, you can obtain
The alternating current of required changeable frequency.As unit load changes, the rotating speed of feed pump turbine can synchronously change, on the one hand, its
Feed pump is directly driven, the change needs of feedwater flow, still further aspect can be met, the steam turbine is promoted by change gear box
Generator, so as to export frequency-changing AC electricity.The generator provides variable frequency power electricity for all subsidiary engines being connected on same bus
Source.The subsidiary engine being wherein connected on frequency conversion bus is also connected to power frequency bus, and power frequency switches as standby each other with frequency conversion.When
When the steam turbine or generator failure or other special operation conditions of frequency conversion, the subsidiary engine of connection frequency conversion bus can switch to power frequency rapidly,
So as to ensure unit safety operation.
Due between feed pump turbine and generator by setting change gear box, it can be ensured that alternator output frequency exists
In required scope.In addition, also can further set clutch between change gear box and generator, when unusual service condition occurs,
Such as differential protection for generator acts, then can cut off generator rapidly by clutch, so that it is guaranteed that safety.Further, may be used also
Corresponding transformer is set after generator output end, makes generator output voltage after transformation, meets different voltage class
Each electric motor of auxiliary machine requirement.
The variable frequency power source of successive step, each auxiliary at the beginning of the frequency conversion system provides a frequency for all subsidiary engines being connected thereto
Movable vane of adjustment structure valve, baffle plate or Axial Fan with Adjustable Vanes on machine etc. can be finely tuned further, to ensure
Meet production requirement.For example, 95% supply frequency of the governor motion aperture to meet the maximum subsidiary engine of regulation aperture as
Variable frequency power source frequency.
Feed pump, the steam turbine of generator are driven while used in the present invention, its work vapour source takes from main steam turbine
Draw gas.
A kind of frequency conversion system provided by the invention mainly has the following advantages that：
1st, the present invention utilizes feed pump turbine, drives generator while feed pump is driven, that is, is not necessary to use other
The frequency converter of pattern is achieved with the alternating current of required frequency, simple and easy.Overcome because using problem caused by frequency converter,
Reliability is high, takes up an area less.
2nd, after using frequency conversion, the subsidiary engine wasted work connected on frequency conversion bus can greatly reduce, so that station service power consumption rate is significantly
Degree reduces.
3rd, because the steam turbine both drives feed pump, and load generator power, thus the relative increase of total driving power, because
This, the relatively conventional feed pump turbine of the steam turbine of selection, can obtain higher internal efficiency.
Design, concrete structure and the caused technique effect of the present invention are described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 are the system schematics of the specific embodiment of the present invention；
Marked in figure：
T：Steam turbine；G：Generator；P：Feed pump；GB:Change gear box；C：Clutch；Tr：Two-winding transformer；
Tr’：Three-winding transformer；
a：Frequency conversion bus；b:Power frequency bus；
c：Frequency conversion bus；d：Power frequency bus
1a, 2a, 3a ..., na：Switch between subsidiary engine and frequency conversion bus；
1b, 2b, 3b ..., nb：Switch between subsidiary engine and power frequency bus；
1c, 2c, 3c ..., nc：Switch between subsidiary engine and frequency conversion bus；
1d, 2d, 3d ..., nd：Switch between subsidiary engine and power frequency bus；
M1, M2, M3……MnFor the motor of subsidiary engine.
M1', M2', M3’……Mn' be subsidiary engine motor.
Embodiment one
As shown in figure 1, a kind of specific embodiment for thermal power plant frequency conversion system of the present invention, it includes steam turbine
T, feed pump P, generator G, change gear box GB, frequency conversion bus a and power frequency bus b.Subsidiary engine M1, M2, M3……MnPass through switch
1a, 2a, 3a ... ..., na are connected with frequency conversion bus a, and by switching 1b, 2b, 3b ..., nb is connected with power frequency bus b.With machine
Group load variations, into the extraction flow of steam and parameter meeting respective change, the turbine speed synchronously changes, so as on the one hand
Change speed of feedwater, on the one hand change the frequency of the alternating current of generator output.This generator is to be connected to frequency conversion bus a
On all subsidiary engines variable frequency power power supply is provided, and power frequency bus b can switch as standby each other with frequency conversion bus a.Work as frequency conversion
Steam turbine or generator failure or other special operation conditions when, the subsidiary engine on all frequency conversion bus a can switch to power frequency mother rapidly
Line b, so as to ensure unit safety operation.
Embodiment two
As shown in Fig. 2 a kind of another specific embodiment for thermal power plant frequency conversion system of the present invention, it includes vapour
Turbine T, feed pump P, generator G, change gear box GB, clutch C, frequency conversion bus a and power frequency bus b.Subsidiary engine M1, M2,
M3……MnBy switching 1a, 2a, 3a ... ..., na is connected with frequency conversion bus a, by switching 1b, 2b, 3b ..., nb and power frequency
Bus b is connected.As unit load changes, into the amount of drawing gas and parameter the meeting respective change of the steam turbine, the turbine speed
Synchronous change, so as on the one hand change speed of feedwater, on the one hand change the frequency of the alternating current of generator output.This generates electricity
Machine provides variable frequency power power supply for all subsidiary engines being connected on frequency conversion bus a, and power frequency bus b and frequency conversion bus a can be each other
Switching is as standby.When the steam turbine or generator failure or other special operation conditions of frequency conversion, the subsidiary engine on frequency conversion bus a can be fast
Speed switches to power frequency bus b, so as to ensure safety.
Compared with embodiment one, the embodiment is due to being additionally arranged clutch C, once unusual service condition occurs, as generator is poor
Dynamic protection act etc., then can cut off generator rapidly by clutch, switch to the steam turbine and only bring water pump operation state, it is ensured that
System and equipment safety.
Embodiment three
As shown in figure 3, a kind of another specific embodiment for thermal power plant frequency conversion system of the present invention, it includes vapour
Turbine T, feed pump P, generator G, change gear box GB, two-winding transformer Tr, frequency conversion bus a and power frequency bus b.Subsidiary engine
M1, M2, M3……MnBy switching 1a, 2a, 3a ... ..., na is connected with frequency conversion bus a, by switching 1b, 2b, 3b ..., nb
It is connected with power frequency bus b.As unit load changes, into the amount of drawing gas and parameter the meeting respective change of the steam turbine, the steamer
Machine synchronization changes, and so as on the one hand change speed of feedwater, on the one hand changes the frequency of the alternating current of generator output.This
Individual generator provides variable frequency power power supply for all subsidiary engines for being connected on frequency conversion bus a, and power frequency bus b and frequency conversion bus a
It can switch each other as standby.It is auxiliary on frequency conversion bus a when the steam turbine or generator failure or other special operation conditions of frequency conversion
Machine can switch to power frequency bus b rapidly, so as to ensure safety.
Compared with embodiment one, the embodiment can make generator output electricity due to being additionally arranged two-winding transformer Tr
Pressure met the requirement of each electric motor of auxiliary machine with voltage class by transformation later.
Embodiment four
As shown in figure 4, a kind of another specific embodiment for thermal power plant frequency conversion system of the present invention, it includes vapour
Turbine T, feed pump P, generator G, change gear box GB, two-winding transformer Tr, frequency conversion bus a, power frequency bus b, frequency conversion are female
Line c, power frequency bus d.Subsidiary engine M1, M2, M3……MnBy switching 1a, 2a, 3a ... ..., na is connected with frequency conversion bus a, by opening
1b, 2b, 3b ... are closed, nb is connected with power frequency bus b；Subsidiary engine M1', M2', M3’……Mn' by switching 1c, 2c, 3c ... ...,
Nc is connected with frequency conversion bus c, and by switching 1d, 2d, 3d ..., nd is connected with power frequency bus d.As unit load changes, enter
The amount of drawing gas and parameter meeting respective change, the turbine speed for entering the steam turbine synchronously change, so as to one side change feed pump
Rotating speed, on the one hand change the frequency of the alternating current of generator output.This generator be connected to it is all auxiliary on frequency conversion bus a
Machine provides variable frequency power power supply, and power frequency bus b can switch as standby each other with frequency conversion bus a；Become simultaneously by double winding
After depressor Tr, variable frequency power power supply is provided for all subsidiary engines on the frequency conversion bus c of different voltage class, and power frequency bus d with
Frequency conversion bus c can switch as standby each other.
When the steam turbine or generator failure or other special operation conditions of frequency conversion, the subsidiary engine on frequency conversion bus a can be cut rapidly
Power frequency bus b is shifted to, while the subsidiary engine on frequency conversion bus c can switch to power frequency bus d rapidly, so as to ensure safety.
The present embodiment both directly can meet generator output voltage the voltage request of part electric motor of auxiliary machine, while again may be used
Voltage is set to meet the requirement of other voltage class electric motor of auxiliary machines after two-winding transformer Tr transformations.
Embodiment five
As shown in figure 5, a kind of another specific embodiment for thermal power plant frequency conversion system of the present invention, it includes vapour
Turbine T, feed pump P, generator G, change gear box GB, three-winding transformer Tr ', frequency conversion bus a, power frequency bus b, frequency conversion are female
Line c, power frequency bus d.Subsidiary engine M1, M2, M3……MnBy switching 1a, 2a, 3a ... ..., na is connected with frequency conversion bus a, by opening
1b, 2b, 3b ... are closed, nb is connected with power frequency bus b；Subsidiary engine M1', M2', M3’……Mn' by switching 1c, 2c, 3c ... ...,
Nc is connected with frequency conversion bus c, and by switching 1d, 2d, 3d ..., nd is connected with power frequency bus d.As unit load changes, enter
The amount of drawing gas and parameter meeting respective change, the turbine speed for entering the steam turbine synchronously change, so as to one side change feed pump
Rotating speed, on the one hand change the frequency of the alternating current of generator output.This generator be connected to it is all auxiliary on frequency conversion bus a
Machine provides variable frequency power power supply, and power frequency bus b can switch as standby each other with frequency conversion bus a；Become simultaneously by double winding
After depressor Tr, variable frequency power power supply is provided for all subsidiary engines on the frequency conversion bus c of different voltage class, and power frequency bus d with
Frequency conversion bus c can switch as standby each other.
When the steam turbine or generator failure or other special operation conditions of frequency conversion, the subsidiary engine on frequency conversion bus a can be cut rapidly
Power frequency bus b is shifted to, while the subsidiary engine on frequency conversion bus c can switch to power frequency bus d rapidly, so as to ensure safety.
Generator output voltage after three-winding transformer Tr ' transformations, then is passed through frequency conversion bus by the present embodiment respectively
A, c provides variable frequency power power supply for the electric motor of auxiliary machine of two kinds of different voltage class.
It is noted that the present invention above example in, two-winding transformer Tr, three-winding transformer Tr ' and
Clutch C is can be combined into various embodiments, but all should be in scope of patent protection of the present invention.
In addition, the governor motions such as baffle plate or valve can be also provided with the subsidiary engine of the present invention.These governor motions can be to auxiliary
The operating condition of machine is finely adjusted, to meet production requirement.
The characteristics of present invention is using the change of feed pump turbine rotating speed random groups synchronizing at load, and then drive variable-frequency power generation
Machine, the frequency for changing the subsidiary engine power supply that is connected is realized, so as to change the running speed of these subsidiary engines.
Specific embodiment of the invention described in detail above.It should be appreciated that the ordinary skill of this area is without creative
Work can makes many modifications and variations according to the design of the present invention.Therefore, all technician in the art are according to this
The design of invention passes through the available technical side of logical analysis, reasoning, or a limited experiment on the basis of existing technology
Case, all should be in the protection domain being defined in the patent claims.
Claims (5)
1. a kind of frequency conversion system for thermal power plant, it comprise at least the adjustable steam turbine of rotating speed, feed pump, generator and
Change gear box, frequency conversion bus, power frequency supply, power frequency bus and the subsidiary engine being connected with the frequency conversion bus；It is characterized in that
Feed pump described in the Steam Turbine Driven simultaneously drags the electrical power generators；The generator passes through frequency conversion bus and the firepower
The motor of the subsidiary engine in power plant is connected, and the subsidiary engine to be connected on the frequency conversion bus provides variable frequency power power supply,
The subsidiary engine of the frequency conversion bus connection, while be also connected by power frequency bus with the power frequency supply；Changed according to unit load,
The synchronization of the steam turbine changes, female by the frequency conversion so as to change the frequency of the alternating current of the generator output
Line and then change are connected thereto the supply frequency of all electric motor of auxiliary machines, finally change the subsidiary engine and rotate machinery
Rotating speed.
2. frequency conversion system as claimed in claim 1, wherein also include clutch, the clutch be arranged on change gear box with
Between the generator.
3. frequency conversion system as claimed in claim 1, wherein also including corresponding transformer, the transformer is arranged on generator
After output end.
4. frequency conversion system as claimed in claim 1, wherein the motor of the subsidiary engine passes through switch and the frequency conversion bus phase
Even；The motor of the subsidiary engine is connected by switching with the power frequency bus.
5. frequency conversion system as claimed in claim 1, wherein the subsidiary engine is at least 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202723.XA CN103997277B (en) | 2014-02-24 | 2014-05-14 | A kind of frequency conversion system for thermal power plant |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410061594 | 2014-02-24 | ||
| CN201410061594.7 | 2014-02-24 | ||
| CN2014100615947 | 2014-02-24 | ||
| CN201410202723.XA CN103997277B (en) | 2014-02-24 | 2014-05-14 | A kind of frequency conversion system for thermal power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103997277A CN103997277A (en) | 2014-08-20 |
| CN103997277B true CN103997277B (en) | 2018-03-27 |
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ID=51311309
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410202723.XA Active CN103997277B (en) | 2014-02-24 | 2014-05-14 | A kind of frequency conversion system for thermal power plant |
| CN201420245755.3U Expired - Lifetime CN203911829U (en) | 2014-02-24 | 2014-05-14 | Novel frequency conversion system for thermal power station |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420245755.3U Expired - Lifetime CN203911829U (en) | 2014-02-24 | 2014-05-14 | Novel frequency conversion system for thermal power station |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN103997277B (en) |
| WO (1) | WO2015124122A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997277B (en) * | 2014-02-24 | 2018-03-27 | 冯伟忠 | A kind of frequency conversion system for thermal power plant |
| CN105317474B (en) * | 2015-08-30 | 2017-06-06 | 华电电力科学研究院 | A kind of power plant additional steam turbine band Frequency auxiliary system and control method |
| CN105703676A (en) * | 2016-04-13 | 2016-06-22 | 冯伟忠 | Generalized frequency conversion system used for steam turbine generator unit |
| EP3444940B1 (en) | 2016-04-13 | 2022-11-23 | Weizhong Feng | Generalized frequency conversion system for steam turbine generator unit |
| CN106208153B (en) * | 2016-07-27 | 2018-09-18 | 西安西热节能技术有限公司 | A kind of power generation station-service subsidiary engine system tune power source system |
| CN106379154A (en) * | 2016-09-12 | 2017-02-08 | 新疆广汇中化能源技术开发有限公司 | Hybrid driving system |
| CN106849090A (en) * | 2017-03-24 | 2017-06-13 | 上海申能电力科技有限公司 | A kind of electric energy conversion of new multiport and switching system |
| CN106887992A (en) * | 2017-03-24 | 2017-06-23 | 上海申能电力科技有限公司 | A kind of electric energy conversion of many buses and switching system |
| CN106849091A (en) * | 2017-03-24 | 2017-06-13 | 上海申能电力科技有限公司 | It is a kind of to realize novel system, method and application that electric energy conversion switches with motor |
| CN106849089A (en) * | 2017-03-24 | 2017-06-13 | 上海申能电力科技有限公司 | A kind of electric energy conversion and switching system, method and its application |
| CN108832641B (en) * | 2018-06-06 | 2021-05-14 | 三峡大学 | Intelligent auxiliary control device and control method for station service power supply |
| CN108757164A (en) * | 2018-07-10 | 2018-11-06 | 福州大学 | Improve the device and method of engine exhaust turbine generating efficiency |
| CN109306876B (en) * | 2018-07-28 | 2024-09-06 | 西安热工研究院有限公司 | Auxiliary machinery system power source regulating system with heat supply in double-output shaft form of generator |
| CN111794935A (en) * | 2020-08-13 | 2020-10-20 | 刘亚辉 | Method for splitting steam feed pump system into small steam turbine power generation system and full-frequency-conversion electric feed pump system |
| CN112727788B (en) * | 2021-01-14 | 2022-06-28 | 西安陕鼓动力股份有限公司 | Speed regulation method of energy recovery system of speed regulation type double four-quadrant frequency converter |
| CN113806680B (en) * | 2021-09-28 | 2024-02-27 | 西安热工研究院有限公司 | Method for calculating correction amount of steam turbine internal efficiency caused by steam turbine inlet pressure loss |
| CN114837761A (en) * | 2022-05-06 | 2022-08-02 | 西安热工研究院有限公司 | Frequency conversion system for improving internet power and working method |
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|---|---|---|---|---|
| CN202678979U (en) * | 2012-01-10 | 2013-01-16 | 冯伟忠 | Variable-frequency general power system for thermal power plant |
| CN103398005A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Straight condensing car driving water-feeding pump system and method adopting variable-frequency power generator for speed regulation |
| CN203362436U (en) * | 2013-08-02 | 2013-12-25 | 山东电力工程咨询院有限公司 | Novel integrated drive system of water-feeding pump and booster pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352824B (en) * | 2013-08-02 | 2016-05-11 | 山东电力工程咨询院有限公司 | The New type driving system of main feed pump and method |
| CN103997277B (en) * | 2014-02-24 | 2018-03-27 | 冯伟忠 | A kind of frequency conversion system for thermal power plant |
-
2014
- 2014-05-14 CN CN201410202723.XA patent/CN103997277B/en active Active
- 2014-05-14 CN CN201420245755.3U patent/CN203911829U/en not_active Expired - Lifetime
-
2015
- 2015-04-20 WO PCT/CN2015/076943 patent/WO2015124122A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202678979U (en) * | 2012-01-10 | 2013-01-16 | 冯伟忠 | Variable-frequency general power system for thermal power plant |
| CN203362436U (en) * | 2013-08-02 | 2013-12-25 | 山东电力工程咨询院有限公司 | Novel integrated drive system of water-feeding pump and booster pump |
| CN103398005A (en) * | 2013-08-13 | 2013-11-20 | 中国电力工程顾问集团华东电力设计院 | Straight condensing car driving water-feeding pump system and method adopting variable-frequency power generator for speed regulation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203911829U (en) | 2014-10-29 |
| WO2015124122A1 (en) | 2015-08-27 |
| CN103997277A (en) | 2014-08-20 |
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