CN208057170U - Two-shipper backheat generating set and its backheat electricity generation system - Google Patents
Two-shipper backheat generating set and its backheat electricity generation system Download PDFInfo
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- CN208057170U CN208057170U CN201820334871.0U CN201820334871U CN208057170U CN 208057170 U CN208057170 U CN 208057170U CN 201820334871 U CN201820334871 U CN 201820334871U CN 208057170 U CN208057170 U CN 208057170U
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Abstract
The utility model is related to a kind of two-shipper backheat generating set and its backheat electricity generation systems, including steam turbine, frequency converter and industrial frequency generator, the opposite both ends of steam turbine offer steam inlet pipe road and blow-off line, and frequency converter includes planetary gear, frequency converter and adjustable frequency motor.Planetary gear includes gear ring, sun gear, planetary gear and planet stent, the output shaft of gear ring and steam turbine is sequentially connected, sun gear is engaged by planetary gear with gear ring, and the shaft of sun gear is sequentially connected with industrial frequency generator, and one end of planet stent is connect with planet gear transmission；The exportable frequency conversion voltage signal of frequency converter；Adjustable frequency motor is electrically connected with frequency converter.The output shaft of adjustable frequency motor is sequentially connected with the one end of planet stent far from planetary gear；Wherein, adjustable frequency motor can adjust rotating speed according to frequency conversion voltage signal.Two-shipper backheat generating set provided by the utility model and its backheat electricity generation system have higher capacity usage ratio.
Description
Technical field
The utility model is related to thermal power generating technology fields, more particularly to a kind of two-shipper backheat generating set and its backheat
Electricity generation system.
Background technology
Traditional backheat technology is the steam discharge to do work from the ultra-high pressure cylinder or high pressure cylinder of main steam turbine to water generating system
Extraction section steam on pipeline is sent into condensing-type small turbine.Condensing-type small turbine shaft is sequentially connected with feed pump.Steam
The work(part done in condensing-type small turbine is boiler feedwater for driving the shaft of feed pump to rotate.
However, the demand of different period external world's power grids is different, therefore the load of generating set carrying also can
Follow the demand of extraneous power grid and different.In this way, the rotating speed that condensing-type small turbine section shaft in different times will be led to
It differs.And the power frequency and rotating speed when industrial frequency generator power generation are fixed.Therefore, the condensing-type small turbine of variation
Rotating speed can not be with the rotational speed matches of industrial frequency generator, and the work(for causing shafting more than needed is unable to fully utilize, and capacity usage ratio is low.
Utility model content
Based on this, it is necessary to for the relatively low problem of existing capacity usage ratio, provide a kind of two-shipper that capacity usage ratio is high
Backheat generating set and its backheat electricity generation system.
A kind of backheat electricity generation system, including steam turbine, frequency converter and industrial frequency generator, the steam turbine are opposite
Both ends offer steam inlet pipe road and blow-off line, which is characterized in that the frequency converter includes：
Planetary gear, including gear ring, sun gear, planetary gear and planet stent, the output of the gear ring and the steam turbine
Axis is sequentially connected, and the sun gear is engaged by the planetary gear with the gear ring, and the shaft of the sun gear and the work
Frequency generator is sequentially connected, and one end of the planet stent is connect with the planet gear transmission；
The frequency converter of exportable frequency conversion voltage signal；And
The adjustable frequency motor being electrically connected with the frequency converter, the output shaft of the adjustable frequency motor are remote with the planet stent
One end from the planetary gear is sequentially connected；
Wherein, the adjustable frequency motor can adjust rotating speed according to the frequency conversion voltage signal.
Further include the biography of controller and the output shaft tachometer value for detecting the steam turbine in one of the embodiments,
Sensor, the controller are connect with the sensor and the inverter communication, and the controller is used for according to the tachometer value
It controls the frequency converter and generates the frequency conversion voltage signal.
The frequency converter further includes parallel gears in one of the embodiments, and the steam turbine passes through described
Parallel gears is sequentially connected with the gear ring, and the adjustable frequency motor is connected by the parallel gears and planet stent transmission
It connects.
The sun gear and the industrial frequency generator are coaxially connected in one of the embodiments,.
The steam turbine is that speed change takes out back of the body formula small turbine in one of the embodiments,.
In one of the embodiments, regulating valve is provided in the steam inlet pipe road of the steam turbine.
Further include high-pressure heater in one of the embodiments, multichannel extraction line, institute are offered on the steam turbine
Multichannel extraction line is stated to be connected to the high-pressure heater.
A kind of two-shipper backheat generating set, including：
Feed pump；
Main steam turbine；
Oxygen-eliminating device；And
Such as above-mentioned backheat electricity generation system, the main steam turbine includes high pressure cylinder, and the high pressure cylinder offers venthole, described
Venthole is connected to the steam inlet pipe road, and the oxygen-eliminating device is offered into steam ports, it is described enter steam ports be connected to the blow-off line,
The one end of the output shaft of the steam turbine far from the gear ring is sequentially connected with the feed pump.
Above-mentioned two-shipper backheat generating set and its backheat electricity generation system, frequency converter include planetary gear, frequency converter
And adjustable frequency motor.For steam turbine to gear ring input speed, gear ring drives planetary gear rotation.When the speed of steam turbine changes
When, frequency converter controls the rotating speed of adjustable frequency motor by exporting corresponding frequency conversion voltage signal.Due to planet stent and gear ring
Rotating speed can synthesize with the matched rotating speed of industrial frequency generator, and be input on industrial frequency generator from sun gear, therefore pass through to change and become
Frequency voltage signal can make the rotating speed of industrial frequency generator keep stablizing.Therefore, above-mentioned two-shipper backheat generating set and its backheat power generation
System has higher capacity usage ratio.
Description of the drawings
Fig. 1 is the structural schematic diagram of two-shipper backheat generating set in the utility model preferred embodiment；
Fig. 2 is the structural schematic diagram of backheat electricity generation system in the utility model preferred embodiment.
Specific implementation mode
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms
It realizes, however it is not limited to embodiment described herein.Make to the utility model on the contrary, purpose of providing these embodiments is
The understanding of disclosure is more thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more relevant Listed Items.
Referring to Fig. 1, the two-shipper backheat generating set 200 in the utility model preferred embodiment includes feed pump 210, master
Steam turbine 220, oxygen-eliminating device 230 and backheat electricity generation system 100.Under normal circumstances, it can also be wrapped in two-shipper backheat generating set 200
Include boiler 240 and main generator.The opening being connected to boiler 240 is offered on main steam turbine 220.The output of main steam turbine 220
Axis is sequentially connected with main generator.
Main steam turbine 220 is used in the superheated steam generated by boiler 240 into fashionable expansion work.Steam is in main steam turbine
In 220 when acting, the shaft of main steam turbine 220 drives the shaft rotation of main generator and generates electricity.Specifically, main steam turbine can be with
It is the steam turbine of condensing-type, sucking condensing turbine, back pressure turbine or other forms.
Oxygen-eliminating device 230 is for removing the dissolved oxygen and other gases being dissolved in 240 water supply of boiler, to ensure equipment
Safe operation and longer service life.Specifically, oxygen-eliminating device 230 can be atmospheric type deaerator, higher-pressure deaerator, chemistry remove
Oxygen device or the oxygen-eliminating device of other forms 230.
Feed pump 210 is used to the water supply with certain temperature in oxygen-eliminating device 230 being conveyed to boiler 240, is carried for boiler 240
For water.Specifically, feed pump 210 can be single water supply pumping unit, or water supply pump group.
When two-shipper backheat generating set 200 works, the hot steam in boiler 240 enters in main steam turbine 220 and does work.It is main
Steam turbine 220 drives the shaft rotation of main generator and generates electricity.Hot steam after acting is by being recycled into oxygen-eliminating device 230.It removes
Oxygen device 230 removes the oxygen and other gaseous matters being dissolved in hot steam.When boiler 240 needs water supply, backheat power generation system
System extraction section hot steam from main steam turbine 220 is done work.The function that a part is done drives the feed pump 210 by oxygen-eliminating device 230
In water be transported to boiler, and improve the temperature of water during transport.The function of another part affluence generates electricity.
Also referring to Fig. 2, wherein backheat electricity generation system 100 includes steam turbine 110, frequency converter 120 and power frequency
Generator 130.
The opposite both ends of steam turbine 110 offer steam inlet pipe road 112 and blow-off line 114.Main steam turbine 220 includes high pressure
Cylinder 222, high pressure cylinder 222 offer venthole, and venthole is connected to steam inlet pipe road 112.Oxygen-eliminating device 230 is offered into steam ports, is entered
Steam ports is connected to blow-off line 114.Steam turbine 110 is used for driving feed pump 210 to 240 water supply of boiler and driving industrial frequency generator
130 power generations.Specifically, steam turbine 110 can be the vapour of extraction condensing type small turbine, the small steamer of speed change pumping back of the body formula or other forms
Turbine 110.Specifically in the present embodiment, steam turbine 110 is that speed change takes out back of the body formula small turbine.Speed change is taken out back of the body formula small turbine and is compared
General steam turbine 110 has the higher thermal efficiency.Also, when the load of two-shipper backheat generating set 200 changes, become
Speed takes out the alterable rotating speed of back of the body formula small turbine and meets the needs of load to reach.
When boiler 240 needs water supply, the hot steam done work in main steam turbine 220 enters vapour by steam inlet pipe road 112
In turbine 110, and the acting in steam turbine 110.The hot steam that acting is completed enters oxygen-eliminating device 230 by blow-off line 114.
Further, in the present embodiment, it is provided with regulating valve 140 in the steam inlet pipe road 112 of steam turbine 110.
When the load of two-shipper backheat generating set 200 changes, adjust regulating valve 140 aperture, can control into
Enter the pressure size of hot steam in steam turbine 110, and then control the rotating speed of steam turbine 110, reaches control feed pump 210 and power frequency
The purpose of 130 rotating speed of generator.To make hot steam that there is higher capacity usage ratio, in the present embodiment, controllable adjustable
The aperture of valve 140 is between 90%~100%.
Further, backheat electricity generation system 100 further includes high-pressure heater 150, and multichannel steam extraction is offered on steam turbine 110
Pipeline 152, multichannel extraction line 152 are connected to high-pressure heater 150.
Under normal circumstances, in two-shipper backheat generating set 200, high pressure of the multichannel extraction line 152 in main steam turbine 220
In cylinder 222.But the gas after doing work in high pressure cylinder 222 will reenter 240 backheat of boiler, cause energy loss.Cause
This by being arranged multichannel extraction line 152 on steam turbine 110, is carried out multistage on steam turbine 110 in the present embodiment
Steam extraction.The hot steam taken away is not necessarily to enter 240 backheat of boiler, is used directly to do work, energy loss is small.Also, by multichannel steam extraction
Pipeline 152 is set on steam turbine 110, moreover it is possible to which the high pressure cylinder 222 effectivelying prevent in main steam turbine 220 is caused because the degree of superheat is big
The low problem of capacity usage ratio.Steam after multichannel steam extraction enters the heating of high-pressure heater 150, and eventually by pipeline transportation
It is recycled to boiler 240.
Industrial frequency generator 130 is sequentially connected with frequency converter 120, is used for the rich power generation of steam turbine 110.
Since industrial frequency generator 130 is generally connect with extraneous power grid 160, and the frequency of extraneous power grid 160 remains invariable substantially, because
The frequency of this industrial frequency generator 130 need to be matched with the frequency of extraneous power grid 160, and the rotating speed of shaft should remain unchanged.
Wherein, frequency converter 120 includes planetary gear 122, frequency converter 124 and adjustable frequency motor 126.
Planetary gear 122 includes gear ring 1222, sun gear 1224, planetary gear 1226 and planet stent 1228.Gear ring 1222
It is sequentially connected with the output shaft of steam turbine 110, sun gear 1224 is engaged by planetary gear 1226 with gear ring 1222, and sun gear
1224 shaft is sequentially connected with industrial frequency generator 130, and one end and the planetary gear 1226 of planet stent 1228 are sequentially connected.Double
In machine backheat generating set 200, the output shaft of steam turbine 110 is sequentially connected far from one end of gear ring 1222 and feed pump 210.
In frequency converter 120, sun gear 1224, planet stent 1228, gear ring 1222 and planetary gear 1226 are constituted
There are two the differential planet gears of degree of freedom for tool.Planetary gear 1226 is intermeshed with gear ring 1222 and sun gear 1224, is not necessarily to
Speed governing is carried out by shifting slide gear, the space occupied is small, and abrasion is small, and service life is long.Planetary gear 1228 can also pass through
The synthesis and decomposition that multiple transmission ratios are moved, applicability are wider.
Further, in the present embodiment, sun gear 1224 and industrial frequency generator 130 are coaxially connected.
The sun gear 1224 and industrial frequency generator 130 of coaxial arrangement have stronger interference free performance, convenient for more efficient
Transmit rotating speed.
When planetary gear 122 works, steam turbine 110 is to 1222 input speed of gear ring.Gear ring 1222 passes through planetary gear 1226
Sun gear 1224 is driven to move.Meanwhile planet stent 1228 inputs an adjusting also by planetary gear 1226 to sun gear 1224
Rotating speed, both adjusting rotating speeds that the rotating speed that steam turbine 110 inputs is inputted with planet stent 1228 are synthesized in sun gear 1224, are obtained
The output rotating speed of sun gear 1224.Since sun gear 1224 and industrial frequency generator 130 are coaxially connected, what sun gear 1224 exported turns
Speed is directly delivered on industrial frequency generator 130, and industrial frequency generator 130 generates electricity.
Frequency converter 124 is for exporting frequency conversion voltage signal.Specifically, frequency converter 124 can be high-voltage frequency converter, general change
The frequency converter 124 of frequency device, air pump frequency converter or other forms.Frequency converter 124 is to obtain power supply, need to be connected with extraneous power grid 160
It connects.
Adjustable frequency motor 126 is electrically connected with frequency converter 124.Moreover, the output shaft and planet stent of adjustable frequency motor 126
1228 one end far from planetary gear 1226 are sequentially connected.Adjustable frequency motor 126 can adjust rotating speed according to frequency conversion voltage signal.Specifically
, adjustable frequency motor 126 can be the change of threephase asynchronous machine, switched reluctance machines, AC brushless electric machine or other forms
Frequency motor 126.
When frequency converter 124 works normally, frequency conversion voltage signal is exported to adjustable frequency motor 126.Adjustable frequency motor 126 is connecing
It receives frequency conversion voltage signal and adjusts rotating speed later.Since the shaft of adjustable frequency motor 126 is sequentially connected with planet stent 1228, frequency conversion
Motor 126 will drive the rotating speed of planet stent 1228 to change.In turn, planet stent 1228 can with the rotating speed of gear ring 1222
Synthesize with 130 matched rotating speed of industrial frequency generator, and be input on industrial frequency generator 130 from sun gear 1224, therefore frequency converter
124, by changing frequency conversion voltage signal, can make the rotating speed of industrial frequency generator 130 keep stablizing.
Further, in the present embodiment, frequency converter 120 further includes parallel gears 128, and steam turbine 110 passes through
Parallel gears 128 is sequentially connected with gear ring 1222, and adjustable frequency motor 126 is driven by parallel gears 128 and planet stent 1228
Connection.
Parallel gears 128 has the function of parallel transmission rotating speed.Under normal circumstances, the shaft and gear ring of steam turbine 110
1222 be unmatched, and the shaft of adjustable frequency motor 126 is also unmatched with planet stent 1228.Parallel gears 128
Setting, can distinguish good in the shaft and gear ring 1222 of steam turbine 110 and the shaft and planet stent 1228 of adjustable frequency motor 126
While matching well, do not change the input speed for being input to gear ring 1222 and planet stent 1228, there is good transfer function,
So that planetary gear 122 is stable and accurate.
In embodiment, backheat electricity generation system 100 further includes controller (not shown) and the output for detecting steam turbine
The sensor (not shown) of rotating speed value, controller are connect with sensor and inverter communication, and controller is used for according to tachometer value
It controls frequency converter 124 and generates frequency conversion voltage signal.
Sensor is used to obtain the tachometer value of 110 output shaft of steam turbine and sends it to controller.Controller can basis
Tachometer value generates frequency conversion voltage signal, is sent to frequency converter 124.Frequency converter 124 exports frequency conversion voltage letter to adjustable frequency motor 126
Number, realize the adjustment of 126 rotating speed of adjustable frequency motor.
The setting of controller and sensor exports the variation of rotating speed convenient for planet stent 1228 according to steam turbine 110, and
When adjustment rotating speed, and synthesized with the rotating speed for being input to sun gear 1224 from the output shaft of steam turbine 110, so realize with
The matching of 130 rotating speed of industrial frequency generator, to realize the speed change of backheat electricity generation system 100 to the output of constant speed.In this way, backheat is sent out
Electric system 100 has biography speed more accurate, and capacity usage ratio higher.
When backheat electricity generation system 100 works, output shaft and the gear ring 1222 of steam turbine 110 are sequentially connected.When steam turbine 110
Rotating speed when changing, sensor detects the tachometer value of steam turbine 110 and sends it to controller.Controller control becomes
Frequency device 124 exports frequency conversion voltage signal so that the rotating speed of 126 output shaft of adjustable frequency motor changes, so that planet branch
The rotating speed of frame 1228 also changes.The rotating speed of 110 rotating speed of steam turbine of variation and the planet stent 1228 of variation is in sun gear
Rotating speed of the rotating speed for synthesizing and exporting in 1224 shaft, and export always with industrial frequency generator 130 is consistent.
Above-mentioned two-shipper backheat generating set 200 and its backheat electricity generation system 100, frequency converter 120 include planet tooth
Wheel 122, frequency converter 124 and adjustable frequency motor 126.Steam turbine 110 drives planetary gear to 1222 input speed of gear ring, gear ring 1222
1226 rotations.When the speed of steam turbine 110 changes, frequency converter 124 is controlled by exporting corresponding frequency conversion voltage signal
The rotating speed of adjustable frequency motor 126.Since the rotating speed of planet stent 1228 and gear ring 1222 can synthesize and industrial frequency generator 130
The rotating speed matched, and be input on industrial frequency generator 130 from sun gear 1224, therefore power frequency can be made to send out by changing frequency conversion voltage signal
The rotating speed of motor 130 keeps stablizing.Therefore, above-mentioned two-shipper backheat generating set 200 and its backheat electricity generation system 100 have higher
Capacity usage ratio.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (8)
1. a kind of backheat electricity generation system, including steam turbine, frequency converter and industrial frequency generator, the steam turbine it is opposite two
End offers steam inlet pipe road and blow-off line, which is characterized in that the frequency converter includes：
The output shaft of planetary gear, including gear ring, sun gear, planetary gear and planet stent, the gear ring and the steam turbine passes
Dynamic connection, the sun gear are engaged by the planetary gear with the gear ring, and the shaft of the sun gear is sent out with the power frequency
Motor drive connects, and one end of the planet stent is connect with the planet gear transmission；
The frequency converter of exportable frequency conversion voltage signal；And
The adjustable frequency motor being electrically connected with the frequency converter, the output shaft of the adjustable frequency motor is with the planet stent far from institute
The one end for stating planetary gear is sequentially connected；
Wherein, the adjustable frequency motor can adjust rotating speed according to the frequency conversion voltage signal.
2. backheat electricity generation system according to claim 1, which is characterized in that further include controller and for detecting the vapour
The sensor of the output shaft tachometer value of turbine, the controller are connect with the sensor and the inverter communication, the control
Device processed, which is used to control the frequency converter according to the tachometer value, generates the frequency conversion voltage signal.
3. backheat electricity generation system according to claim 1, which is characterized in that the frequency converter further includes parallel teeth
Wheel, the steam turbine are sequentially connected by the parallel gears and the gear ring, and the adjustable frequency motor passes through the parallel teeth
Wheel is sequentially connected with the planet stent.
4. backheat electricity generation system according to claim 1, which is characterized in that the sun gear and the industrial frequency generator are same
Axis connection.
5. backheat electricity generation system according to claim 1, which is characterized in that the steam turbine is that speed change takes out the small steamer of back of the body formula
Machine.
6. backheat electricity generation system according to claim 1, which is characterized in that be provided in the steam inlet pipe road of the steam turbine
Regulating valve.
7. backheat electricity generation system according to claim 1, which is characterized in that further include high-pressure heater, the steam turbine
On offer multichannel extraction line, the multichannel extraction line is connected to the high-pressure heater.
8. a kind of two-shipper backheat generating set, which is characterized in that including：
Feed pump；
Main steam turbine；
Oxygen-eliminating device；And
Such as 1 to 7 any one of them backheat electricity generation system of the claims, the main steam turbine includes high pressure cylinder, the height
Cylinder pressure offers venthole, and the venthole is connected to the steam inlet pipe road, and the oxygen-eliminating device is offered into steam ports, it is described enter vapour
Mouth is connected to the blow-off line, and the output shaft of the steam turbine connects far from one end of the gear ring and the water supply pump drive
It connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820334871.0U CN208057170U (en) | 2018-03-12 | 2018-03-12 | Two-shipper backheat generating set and its backheat electricity generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820334871.0U CN208057170U (en) | 2018-03-12 | 2018-03-12 | Two-shipper backheat generating set and its backheat electricity generation system |
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| CN110374835A (en) * | 2019-07-29 | 2019-10-25 | 东南大学 | A kind of the feed pump variable speed drive system and driving method of two-shipper backheat unit |
| CN110500142A (en) * | 2019-08-01 | 2019-11-26 | 大唐郓城发电有限公司 | A kind of ultra supercritical double reheat power generation sets water supply mercury vapour electricity hybrid drive and method |
| CN110645062A (en) * | 2019-10-31 | 2020-01-03 | 大唐郓城发电有限公司 | Double-machine regenerative system participating in primary frequency modulation and operation method thereof |
| CN114235388A (en) * | 2021-12-15 | 2022-03-25 | 盛瑞传动股份有限公司 | Gearbox fault detection method, device, equipment and storage medium |
| CN114391453A (en) * | 2022-01-07 | 2022-04-26 | 承德石油高等专科学校 | New forms of energy farmland irrigation equipment |
| WO2023236855A1 (en) * | 2022-06-07 | 2023-12-14 | 上海能传电气有限公司 | Control circuit for realizing power balance of a plurality of synchronous motors and control method therefor |
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2018
- 2018-03-12 CN CN201820334871.0U patent/CN208057170U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374835A (en) * | 2019-07-29 | 2019-10-25 | 东南大学 | A kind of the feed pump variable speed drive system and driving method of two-shipper backheat unit |
| CN110500142A (en) * | 2019-08-01 | 2019-11-26 | 大唐郓城发电有限公司 | A kind of ultra supercritical double reheat power generation sets water supply mercury vapour electricity hybrid drive and method |
| CN110645062A (en) * | 2019-10-31 | 2020-01-03 | 大唐郓城发电有限公司 | Double-machine regenerative system participating in primary frequency modulation and operation method thereof |
| CN114235388A (en) * | 2021-12-15 | 2022-03-25 | 盛瑞传动股份有限公司 | Gearbox fault detection method, device, equipment and storage medium |
| CN114391453A (en) * | 2022-01-07 | 2022-04-26 | 承德石油高等专科学校 | New forms of energy farmland irrigation equipment |
| WO2023236855A1 (en) * | 2022-06-07 | 2023-12-14 | 上海能传电气有限公司 | Control circuit for realizing power balance of a plurality of synchronous motors and control method therefor |
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