CN103997277A - Novel frequency conversion system for thermal power plant - Google Patents
Novel frequency conversion system for thermal power plant Download PDFInfo
- Publication number
- CN103997277A CN103997277A CN201410202723.XA CN201410202723A CN103997277A CN 103997277 A CN103997277 A CN 103997277A CN 201410202723 A CN201410202723 A CN 201410202723A CN 103997277 A CN103997277 A CN 103997277A
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- Prior art keywords
- frequency
- frequency conversion
- bus
- generator
- 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 novel frequency conversion system for a thermal power plant. The novel frequency conversion system at least comprises a turbine, a feed pump, a generator, a speed change gearbox, a frequency conversion bus and an auxiliary machine connected with the frequency conversion bus, wherein the rotating speed of the turbine can be adjusted. The steam extraction capacity entering the turbine and parameters are changed correspondingly along with the variation of unit loads. The rotating speed of the turbine synchronously changes, and therefore the rotating speed of the feed pump is changed on one hand, and the frequency of alternating currents output by the generator is changed on the other hand. Frequency converters of other types do not need to be additionally arranged, the system is simple, relevant problems brought by using the frequency converters of other types are solved, reliability is high, and occupied land is small.
Description
Technical field
The present invention relates to a kind of Novel variable-frequency system, relate in particular to a kind of Novel variable-frequency system for thermal power plant.
Background technology
In the production process in thermal power plant, water is heated and becomes steam in boiler, then utilizes the rotation of Steam Actuation steam turbine, drives generator rotation, finally converts the chemical energy of fuel to electric energy.In the process of generating, the rotation subsidiary engines such as a large amount of Pumps & Fans that thermal power plant is equipped with need to consume a large amount of electric energy.Current common practices is by station transformer, and electricity is drawn to a part for station-service subsidiary engine.
Thermal power plant is in the time of engineering design, and generally by greatest requirements and add that certain surplus chooses the capacity of subsidiary engine, thereby subsidiary engine in actual motion has larger allowance.And when the subsidiary engine of constant speed operation is not during in lower operation at full capacity, particularly in underrun, its operating efficiency can sharply decline, this causes the serious waste of electric energy.If employing variable-frequency control technique can make the working point of subsidiary engine as far as possible near efficient district, and reduce to greatest extent the throttling loss of blower fan baffle plate, valve, energy consumption when reduction equipment moves greatly, the useful life of extension device.Taking blower fan as example, according to fluid mechanics principle, shaft power is directly proportional to the cube of rotating speed.When Air Quantity Required reduces, when rotation speed of fan reduces, the cube that its power is pressed rotating speed declines.Therefore, the energy-saving effect of variable-speed operation is considerable.
Variable-frequency control technique is current energy-saving and emission-reduction, improve technological process to improve the quality of products and to improve a kind of important means of environment, Promote Technology.Frequency control is known as the most rising mode of speed regulation both at home and abroad with advantages such as its excellent speed governing and a braking ability, high efficiency, high power factor and power savings.Power plant changes water pump or blower motor frequency by attached with frequency converters to reach at present, thereby changes the rotating speed of water pump or blower fan, improves its operational efficiency, reaches energy-saving and emission-reduction object.
Conversion system mainly contains controllable silicon frequency conversion, fluid power coupling frequency conversion and magnetic couple frequency conversion now.In these three kinds of conversion systems, fluid power coupling frequency-converter power is large, and reliability is low, cost is low, and its efficiency is directly proportional to the first power of rotating speed, and degree of regulation is low.Magnetic couple frequency conversion reliability is high, and cost is the highest, square being directly proportional of its efficiency and rotating speed, and when rotating speed is low, efficiency is low, magnetic couple device is installed in addition need to be changed the installation site of motor or equipment, removes original foundation of civil work.Controllable silicon conversion efficiency is the highest, and its efficiency is not subject to the impact of load variations, responds the soonest, and degree of regulation is the highest.In these three kinds of conversion methods, controllable silicon frequency conversion cost is placed in the middle.Consider the employing controllable silicon converter technique that thermal power plant is more from the angle of cost and efficiency.
Owing to having relatively high expectations to equipment dependability in thermal power plant, the rotating machinery adopting, as large in the plant capacity such as circulating water pump, forced draft fan, electric pressure is high, thereby requires also high to the frequency converter for firepower electrical plant.At present in power plant, the frequency conversion equipment that adopts mainly adopts controllable silicon technology, and that the disadvantage of controllable silicon converter technique is electric pressure is higher, and its equipment dependability is lower, and frequency conversion equipment floor space is large, and its frequency-conversion harmonic has impact to electrical network and motor.Therefore, in thermal power plant, controllable silicon converter technique is applied slower.Along with the development of technology, existing portioned product can address the above problem preferably at present, but because these product prices are high, has hindered it and further promoted.
Therefore, the present invention be devoted to develop that a kind of cost is low, high reliability, high efficiency, simple Novel variable-frequency system.
Summary of the invention
In view of the above-mentioned defect of prior art, the object of this invention is to provide that a kind of cost is lower, high reliability, high efficiency, the relatively simple frequency conversion system of system.
A kind of Novel variable-frequency system provided by the invention at least comprises water supply pump, feed pump turbine, change gear box, generator, for the frequency conversion bus of frequency conversion generator assembly cover, be connected to the subsidiary engine on frequency conversion bus.
A kind of Novel variable-frequency system provided by the invention, its general principle is: utilize the adjustable feed pump turbine of rotating speed, driving water supply pump simultaneously, promote a generator, change according to unit load, the synchronization of feed pump turbine changes, thereby changes the frequency of the alternating current of generator output, connect the supply frequency of all electric motor of auxiliary machines thereon by frequency conversion bus and then change, finally change the rotating speed of subsidiary engine rotary machine.
Because the speed adjusting technique of feed pump turbine has developed very perfectly, can realize the even full distance speed regulating of speed governing of wide region, therefore can not need to arrange the frequency converter of other patterns, but utilize feed pump turbine to drive generator, can obtain the alternating current of required changeable frequency.Along with unit load changes, the rotating speed of feed pump turbine can synchronously change, and on the one hand, it directly drives water supply pump, can meet the variation needs of feedwater flow, and in addition on the one hand, this steam turbine is by change gear box pushing generator, thus output frequency-changing AC electricity.This generator provides frequency conversion electrical source of power for all subsidiary engines that are connected on same bus.The subsidiary engine being wherein connected on frequency conversion bus also can be connected to power frequency bus, and power frequency and frequency conversion are switched each other as for subsequent use.In the time of the steam turbine of frequency conversion or generator failure or other special operation conditions, the subsidiary engine that connects frequency conversion bus can switch to rapidly power frequency, thereby ensures unit safety operation.
Due between feed pump turbine and generator by change gear box is set, can guarantee generator output frequency within the required range.In addition, also can further between change gear box and generator, clutch be set, when there is unusual service condition, as differential protection for generator action etc., can excise rapidly generator by clutch, thereby guarantee safety.Further, corresponding transformer also can be set after generator output end, make generator output voltage after transformation, meet the requirement of each electric motor of auxiliary machine of different electric pressures.
This frequency conversion system provides a preliminary variable frequency power source of adjusting of frequency for connecting all subsidiary engines thereon, the movable vane of the adjustment structure on each subsidiary engine such as valve, baffle plate or Axial Fan with Adjustable Vanes etc. can further be finely tuned again, to ensure to meet production requirement.For example,, using 95% the supply frequency of governor motion aperture that meets the subsidiary engine that regulates aperture maximum as variable frequency power source frequency.
When the present invention is used, drive the steam turbine of water supply pump, generator, drawing gas of main steam turbine taken from its work vapour source.
The main tool of a kind of Novel variable-frequency system provided by the invention has the following advantages:
1, the present invention utilizes feed pump turbine, drives generator driving in water supply pump, must not adopt the frequency converter of other patterns just can obtain the alternating current of required frequency, simple.Overcome the problem because using frequency converter to bring, reliability is high, takes up an area less.
2, adopt after frequency conversion, the subsidiary engine wasted work connecting on frequency conversion bus can greatly reduce, thereby station service power consumption rate is significantly reduced.
3, because this steam turbine had both driven water supply pump, load generator power again, thereby always driving power increases relatively, therefore, the relatively traditional feed pump turbine of this steam turbine of selecting, can obtain higher internal efficiency.
Below with reference to accompanying drawing, the technique effect of design of the present invention, concrete structure and generation is described further, to understand fully object 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 schematic of specific embodiments of the invention;
Mark in figure:
T: steam turbine; G: generator; P: water supply 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: the switch between subsidiary engine and frequency conversion bus;
1b, 2b, 3b ..., nb: the switch between subsidiary engine and power frequency bus;
1c, 2c, 3c ..., nc: the switch between subsidiary engine and frequency conversion bus;
1d, 2d, 3d ..., nd: the switch between subsidiary engine and power frequency bus;
M
1, M
2, M
3m
nfor the motor of subsidiary engine.
M
1', M
2', M
3' ... M
n' be the motor of subsidiary engine.
embodiment one
As shown in Figure 1, a kind of specific embodiment for thermal power plant Novel variable-frequency system of the present invention, it comprises T Steam Turbine, water supply pump P, generator G, change gear box GB, frequency conversion bus a and power frequency bus b.Subsidiary engine M
1, M
2, M
3m
nby switch 1a, 2a, 3a ..., na is connected with frequency conversion bus a, by switch 1b, 2b, 3b ..., nb is connected with power frequency bus b.Along with unit load changes, enter this extracted steam from turbine amount and parameter meeting respective change, this turbine speed synchronously changes, thereby changes speed of feedwater on the one hand, changes on the one hand the frequency of the alternating current of generator output.This generator provides frequency conversion electrical source of power for all subsidiary engines that are connected on frequency conversion bus a, and power frequency bus b and frequency conversion bus a can switch each other as for subsequent use.In the time of the steam turbine of frequency conversion or generator failure or other special operation conditions, the subsidiary engine on all frequency conversion bus a can switch to rapidly power frequency bus b, thereby ensures unit safety operation.
embodiment two
As shown in Figure 2, a kind of another specific embodiment for thermal power plant Novel variable-frequency system of the present invention, it comprises T Steam Turbine, water supply pump P, generator G, change gear box GB, clutch C, frequency conversion bus a and power frequency bus b.Subsidiary engine M
1, M
2, M
3m
nby switch 1a, 2a, 3a ..., na is connected with frequency conversion bus a, by switch 1b, 2b, 3b ..., nb is connected with power frequency bus b.Along with unit load changes, enter the amount of drawing gas and the parameter meeting respective change of this steam turbine, this turbine speed synchronously changes, thereby changes speed of feedwater on the one hand, changes on the one hand the frequency of the alternating current of generator output.This generator provides frequency conversion electrical source of power for all subsidiary engines that are connected on frequency conversion bus a, and power frequency bus b and frequency conversion bus a can switch each other as for subsequent use.In the time of the steam turbine of frequency conversion or generator failure or other special operation conditions, the subsidiary engine on frequency conversion bus a can switch to rapidly power frequency bus b, thereby ensures safety.
Compared with embodiment mono-, this embodiment is owing to having set up clutch C, once there is unusual service condition; as differential protection for generator action etc.; can excise rapidly generator by clutch, transfer this steam turbine to and only bring water pump operation state, guarantee system and device security.
embodiment three
As shown in Figure 3, a kind of another specific embodiment for thermal power plant Novel variable-frequency system of the present invention, it comprises T Steam Turbine, water supply pump P, generator G, change gear box GB, two winding transformer Tr, frequency conversion bus a and power frequency bus b.Subsidiary engine M
1, M
2, M
3m
nby switch 1a, 2a, 3a ..., na is connected with frequency conversion bus a, by switch 1b, 2b, 3b ..., nb is connected with power frequency bus b.Along with unit load changes, enter the amount of drawing gas and the parameter meeting respective change of this steam turbine, this turbine speed synchronously changes, thereby changes speed of feedwater on the one hand, changes on the one hand the frequency of the alternating current of generator output.This generator provides frequency conversion electrical source of power for all subsidiary engines that are connected on frequency conversion bus a, and power frequency bus b and frequency conversion bus a can switch each other as for subsequent use.In the time of the steam turbine of frequency conversion or generator failure or other special operation conditions, the subsidiary engine on frequency conversion bus a can switch to rapidly power frequency bus b, thereby ensures safety.
Compared with embodiment mono-, this embodiment, owing to having set up two winding transformer Tr, therefore can make generator output voltage meet afterwards the requirement with each electric motor of auxiliary machine of electric pressure through transformation.
embodiment four
As shown in Figure 4, a kind of another specific embodiment for thermal power plant Novel variable-frequency system of the present invention, it comprises T Steam Turbine, water supply pump P, generator G, change gear box GB, two winding transformer Tr, frequency conversion bus a, power frequency bus b, frequency conversion bus c, power frequency bus d.Subsidiary engine M
1, M
2, M
3m
nby switch 1a, 2a, 3a ..., na is connected with frequency conversion bus a, by switch 1b, 2b, 3b ..., nb is connected with power frequency bus b; Subsidiary engine M
1', M
2', M
3' ... M
n' by switch 1c, 2c, 3c ..., nc is connected with frequency conversion bus c, by switch 1d, 2d, 3d ..., nd is connected with power frequency bus d.Along with unit load changes, enter the amount of drawing gas and the parameter meeting respective change of this steam turbine, this turbine speed synchronously changes, thereby changes speed of feedwater on the one hand, changes on the one hand the frequency of the alternating current of generator output.This generator provides frequency conversion electrical source of power for all subsidiary engines that are connected on frequency conversion bus a, and power frequency bus b and frequency conversion bus a can switch each other as for subsequent use; By after two winding transformer Tr, for all subsidiary engines on the frequency conversion bus c of different electric pressures provide frequency conversion electrical source of power, and power frequency bus d and frequency conversion bus c can switch each other as for subsequent use simultaneously.
In the time of the steam turbine of frequency conversion or generator failure or other special operation conditions, the subsidiary engine on frequency conversion bus a can switch to rapidly power frequency bus b, and the subsidiary engine on the bus of frequency conversion simultaneously c can switch to rapidly power frequency bus d, thereby ensures safety.
The present embodiment both can directly meet generator output voltage the voltage request of part electric motor of auxiliary machine, can make again voltage after two winding transformer Tr transformation simultaneously, met the requirement of other electric pressure electric motor of auxiliary machine.
embodiment five
As shown in Figure 5, a kind of another specific embodiment for thermal power plant Novel variable-frequency system of the present invention, it comprises T Steam Turbine, water supply pump P, generator G, change gear box GB, three-winding transformer Tr ', frequency conversion bus a, power frequency bus b, frequency conversion bus c, power frequency bus d.Subsidiary engine M
1, M
2, M
3m
nby switch 1a, 2a, 3a ..., na is connected with frequency conversion bus a, by switch 1b, 2b, 3b ..., nb is connected with power frequency bus b; Subsidiary engine M
1', M
2', M
3' ... M
n' by switch 1c, 2c, 3c ..., nc is connected with frequency conversion bus c, by switch 1d, 2d, 3d ..., nd is connected with power frequency bus d.Along with unit load changes, enter the amount of drawing gas and the parameter meeting respective change of this steam turbine, this turbine speed synchronously changes, thereby changes speed of feedwater on the one hand, changes on the one hand the frequency of the alternating current of generator output.This generator provides frequency conversion electrical source of power for all subsidiary engines that are connected on frequency conversion bus a, and power frequency bus b and frequency conversion bus a can switch each other as for subsequent use; By after two winding transformer Tr, for all subsidiary engines on the frequency conversion bus c of different electric pressures provide frequency conversion electrical source of power, and power frequency bus d and frequency conversion bus c can switch each other as for subsequent use simultaneously.
In the time of the steam turbine of frequency conversion or generator failure or other special operation conditions, the subsidiary engine on frequency conversion bus a can switch to rapidly power frequency bus b, and the subsidiary engine on the bus of frequency conversion simultaneously c can switch to rapidly power frequency bus d, thereby ensures safety.
The present embodiment after three-winding transformer Tr ' transformation, then provides frequency conversion electrical source of power by frequency conversion bus a, c for the electric motor of auxiliary machine of two kinds of different electric pressures respectively by generator output voltage.
Should be noted, in above embodiment of the present invention, two winding transformer Tr, three-winding transformer Tr ' and clutch C can be combined into various embodiments, but all should be in scope of patent protection of the present invention.
In addition, on subsidiary engine of the present invention, also can be provided with the governor motion such as baffle plate or valve.These governor motions can be finely tuned the operating condition of subsidiary engine, to meet production requirement.
The present invention utilizes the synchronous feature changing of feed pump turbine rotating speed random groups load, and then drives frequency conversion generator, and realization changes the frequency of subsidiary engine power supply that is connected, thereby changes the running speed of these subsidiary engines.
More than describe specific embodiments of the invention in detail.The ordinary skill that should be appreciated that this area just can design according to the present invention be made many modifications and variations without creative work.Therefore, all technical staff in the art, all should be in by the determined protection range of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (6)
1. for the Novel variable-frequency system in thermal power plant, which comprises at least the adjustable steam turbine of rotating speed, water supply pump, generator and change gear box, frequency conversion bus and coupled subsidiary engine; Water supply pump drag the generating of described generator described in described Steam Turbine Driven; Described generator is connected with the motor of the subsidiary engine in described thermal power plant by frequency conversion bus; By changing turbine speed, thereby change the generating frequency of described generator, finally change the working speed of described frequency conversion subsidiary engine that bus connects.
2. frequency conversion system as claimed in claim 1, wherein also can comprise power frequency supply, the motor of described subsidiary engine is connected with described power frequency supply by described power frequency bus, make in the time of described steam turbine or described generator failure or other special operation conditions, can switch to rapidly power frequency supply, thereby ensure unit safety operation.
3. frequency conversion system as claimed in claim 1, wherein also can comprise clutch, described clutch is arranged between change gear box and described generator, in the time of described generator failure or other special operation conditions, can be by the described clutch described generator of excision rapidly, make described steam turbine only be with described water supply pump operation, to guarantee system and device security.
4. frequency conversion system as claimed in claim 1, wherein also can comprise corresponding transformer, and described transformer is arranged on after generator output end, makes generator output voltage after transformation, meets the requirement of each electric motor of auxiliary machine of different electric pressures.
5. frequency conversion system as claimed in claim 1, the motor of wherein said subsidiary engine is connected with described frequency conversion bus by switch; The motor of described subsidiary engine is connected with described power frequency bus by switch.
6. frequency conversion system as claimed in claim 1, wherein said 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 |
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| CN103997277A true CN103997277A (en) | 2014-08-20 |
| CN103997277B CN103997277B (en) | 2018-03-27 |
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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 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420245755.3U Expired - Lifetime CN203911829U (en) | 2014-02-24 | 2014-05-14 | Novel frequency conversion system for thermal power station |
Country Status (2)
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|---|---|
| CN (2) | CN103997277B (en) |
| WO (1) | WO2015124122A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317474A (en) * | 2015-08-30 | 2016-02-10 | 华电电力科学研究院 | Power plant system with additional steam turbine and variable frequency auxiliary machines and control method |
| CN105703676A (en) * | 2016-04-13 | 2016-06-22 | 冯伟忠 | Generalized frequency conversion system used for steam turbine generator unit |
| 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 |
| 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 |
| WO2017177612A1 (en) * | 2016-04-13 | 2017-10-19 | 冯伟忠 | Generalized frequency conversion system for steam turbine generator unit |
| CN108832641A (en) * | 2018-06-06 | 2018-11-16 | 三峡大学 | A kind of intelligent sub-controlling unit and control method of service power |
| CN109306876A (en) * | 2018-07-28 | 2019-02-05 | 西安热工研究院有限公司 | A kind of subsidiary engine system tune power source system of the double shaft forms of generator with heat supply |
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| CN103997277B (en) * | 2014-02-24 | 2018-03-27 | 冯伟忠 | A kind of frequency conversion system for thermal power plant |
| 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 |
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| 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 |
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- 2014-05-14 CN CN201420245755.3U patent/CN203911829U/en not_active Expired - Lifetime
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| 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 |
| CN105317474A (en) * | 2015-08-30 | 2016-02-10 | 华电电力科学研究院 | Power plant system with additional steam turbine and variable frequency auxiliary machines and control method |
| WO2017177612A1 (en) * | 2016-04-13 | 2017-10-19 | 冯伟忠 | Generalized frequency conversion system for steam turbine generator unit |
| CN105703676A (en) * | 2016-04-13 | 2016-06-22 | 冯伟忠 | Generalized frequency conversion system used for steam turbine generator unit |
| US11329583B2 (en) | 2016-04-13 | 2022-05-10 | Weizhong Feng | Generalized frequency conversion system for steam turbine generator unit |
| EP3444940A4 (en) * | 2016-04-13 | 2019-04-24 | Weizhong Feng | Generalized frequency conversion system for steam turbine generator unit |
| US20190071992A1 (en) * | 2016-04-13 | 2019-03-07 | Weizhong Feng | Generalized frequency conversion system for steam turbine generator unit |
| 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 |
| 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 |
| 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 |
| 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 |
| CN108832641A (en) * | 2018-06-06 | 2018-11-16 | 三峡大学 | A kind of intelligent sub-controlling unit and control method of service power |
| CN108832641B (en) * | 2018-06-06 | 2021-05-14 | 三峡大学 | Intelligent auxiliary control device and control method for station service power supply |
| CN109306876A (en) * | 2018-07-28 | 2019-02-05 | 西安热工研究院有限公司 | A kind of subsidiary engine system tune power source system of the double shaft forms of generator with heat supply |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203911829U (en) | 2014-10-29 |
| CN103997277B (en) | 2018-03-27 |
| WO2015124122A1 (en) | 2015-08-27 |
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