CN201016985Y - Water turbine programmable rotation rate signal apparatus based on voting output mode - Google Patents
Water turbine programmable rotation rate signal apparatus based on voting output mode Download PDFInfo
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- CN201016985Y CN201016985Y CNU2007200837473U CN200720083747U CN201016985Y CN 201016985 Y CN201016985 Y CN 201016985Y CN U2007200837473 U CNU2007200837473 U CN U2007200837473U CN 200720083747 U CN200720083747 U CN 200720083747U CN 201016985 Y CN201016985 Y CN 201016985Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
A voting output-based programmable rotating speed signal device of a turbine comprises a rotating speed measuring sensor, and a controller, which is used to receive a rotating speed measuring signal and to control and toadjust the rotating speed of the turbine based on the signal. The device is characterized in that the rotating speed signal measuring sensor is provided with a plurality of ways, three ways or five-ways; the controller is a programmable controller, which outputs control signals in the way of voting according to the principle of two out of three or three out of five based on measured multi-way rotating speed signals; a signal output end of the rotating speed signal measuring sensor is connected with an input module of the programmable controller; an output module of the programmable controller is connected with a turbine protecting device and a turbine relay control connecting point via an analog amount output port D/A and a digital amount output port D/D of the controller. The utility model provides at least three independent sensors to detect the rotating speed signal of the water turbine and the majority output principle by choosing two out of three is adopted, which can completely guarantee the reliability and accuracy of the output and improve operating security of a water turbine unit.
Description
Technical field
The utility model relates to genset tachometric survey control device, especially a kind of hydraulic turbine rotating speed signal device able to programme based on the voting way of output.
Background technology
Hydraulic generator unit rotating speed is an outstanding feature of reflection unit operation operating mode.The tachometer value different according to unit, rotating speed signal device just can send different orders and signal, unit is operated automatically or protected.For example: when generating unit speed reach rated speed 140% the time, send and fly the signal that escapes, order unit force outage operation, and close inlet gate; When generating unit speed reach rated speed 115% the time, still be in non-off-position as the main control valve of speed regulator, then send the signal of overrunning and make the overspeed protection device action, order unit force outage; In start and network process in the automatic self synchronizing mode, when unit rises to 98% (requiring to decide according to different power stations) of rated speed, send the signal same period, generator breaker is closed a floodgate, with the unit input coefficient; In the stopping process, when generating unit speed drop to rated speed 35% the time, send brake signal, unit is braked etc.This shows that the rotating speed signal device of unit is the unit automation operation and protects requisite link.The reliability and stability of this device directly affect the safe operation of unit.
The rotating speed signal device that uses has their own characteristics each at present, be divided into two kinds of fluted disc frequency measurement mode (SSG) and residual voltage frequency measurement modes (PT) according to signal source source, can be divided into single-chip microcomputer mode and PLC mode again according to the control core, distinguish by signal source: the characteristics of the maximum of SSG mode are test of low rotating speed (scope 1～100Hz), signal directly reflects the rotating speed of unit, and, be difficult for being interfered owing to be output as the pulsed quantity signal.But very important is exactly, and that this type mode of testing the speed is influenced by probe mounting is bigger, and particularly the unit pendulum radially wobbles when big, can exert an influence to frequency measurement stability.And the machining precision of fluted disc is directly to the precision that tests the speed.The characteristics of PT metering system are that signal gathers by PT, and the frequency of the signal of being surveyed is the rotating speed of unit, because signal directly reflects the machine class frequency, so its frequency-measurement accuracy height.But its shortcoming is that measurement stability is relatively poor under the slow-speed of revolution situation, particularly below the 10HZ, is difficult for measuring accurately.Also having a bit is exactly to be to detect its real generating unit speed when generator is in excitation loss operation.By controlling the core branch: the maximum of single-chip microcomputer is low price, universal strong a little.But its shortcoming is poor anti jamming capability, phenomenons such as deadlock, program fleet, misoperation occurs easily.The characteristics of PLC maximum are to take into full account on-site actual situations for Industry Control designs, and antijamming capability is strong, many characteristics such as mean free error time height.
The main working method of the rotating speed signal device of Shi Yonging is at home: control core+list probe; control core+two probes, control core+list probe+residual voltage; control core+residual voltage or the like several modes; the basis for estimation that it is evident that its output can only come from the mono signal source; when the mono signal source occurs when unusual; for example: residual voltage test the speed unit loss of excitation under the mode, closely just can make signal produce distortion because the fluted disc mounting distance is crossed far away or crossed, cause the signal of device to report by mistake and cause the unit disorderly closedown.
Summary of the invention
The hydraulic turbine rotating speed signal device able to programme that the utility model proposes based on the voting way of output, provide at least three independently sensor detect the rotational speed of water turbine signal, adopt three to select two majority output principle, guarantee output reliability and accuracy in the hope of being bordering on 100% ground, improve the security of water wheels unit.
Described hydraulic turbine rotating speed signal device able to programme based on the voting way of output comprises the tach signal survey sensor, be used to receive rotating speed letter measuring-signal and based on this signal and the controller of regulating and controlling rotational speed of water turbine, it is characterized in that: described tach signal survey sensor has multichannel, be three the road or five the tunnel, described controller is a kind ofly to get two or five based on survey multichannel tach signal according to three and get the Programmable Logic Controller of three majority principles voting output control signal; The signal output part of tach signal survey sensor links to each other with the load module of Programmable Logic Controller, and the output module of Programmable Logic Controller links to each other with hydraulic turbine protective device, hydraulic turbine relay control contact through its analog quantity output port and digital quantity output port.
Described tach signal survey sensor has three the tunnel, and wherein two tunnel signal acquisition point is located at the generator shaft place, is fluted disc frequency measurement sensor, and one tunnel signal acquisition point is located at output place of generator windings voltage, is residual voltage frequency measurement sensor.
It is the core control element that the utility model adopts the high Programmable Logic Controller of reliability, has improved the reliability of hardware greatly.Eliminated the signal source interference admirably by the sampled signal that fluted disc obtains, the minimum rotating speed of surveying reaches about 1Hz; Residual voltage frequency measurement scope is also improved greatly, and rotating speed can the survey scope reach about (7～90) Hz.This rotating speed signal device not only has good hardware foundation, and its software function is also very powerful: the group of four figures pipe on the panel can the display machines class frequency, also can show generating unit speed number percent by the frequency on the panel/number percent change-over switch according to user's needs; Signal lamp is indicated the duty (1 power light, 1 frequency/number percent signal lamp, a plurality of actuating of relay pilot lamp and 1 malfunction indicator lamp) of rotating speed signal device respectively; 6 membrane keyboards on the panel be used for respectively adjusting rotating speed signal device working value and show the unit maximum (top) speed.Rotating speed signal device is developed as the multiple input signals that overlaps greater than three, two-way SSG+ one tunnel residual voltage (PT), separately the advantage can brought into play reaches the purpose of accurate output, adopts three majority principles that select two outputs almost can 100% ground to guarantee the reliability and the accuracy of output.Thereby can significantly reduce large-scale and super-huge unit because the malfunction of rotating speed signal device causes the disorderly closedown of unit, not only can bring great economic economic benefit to the power station, but also give electrical network stablely make bigger contribution, and to consume cost few.
Description of drawings
Fig. 1 is the utility model systematic schematic diagram;
Fig. 2 is the primary control program process flow diagram.
Embodiment
Show as Fig. 1, described hydraulic turbine rotating speed signal device 20 able to programme based on the voting way of output comprises the tach signal survey sensor, be used to receive rotating speed letter measuring-signal and based on this signal and the controller of regulating and controlling rotational speed of water turbine, it is characterized in that: described tach signal survey sensor has multichannel, be three the road or five the tunnel, described controller is a kind ofly to get two or five based on survey multichannel tach signal according to three and get the Programmable Logic Controller 10 of three majority principles voting output control signal; The signal output part of tach signal survey sensor links to each other with the load module 9 of Programmable Logic Controller 10, and the output module 11 of Programmable Logic Controller links to each other with hydraulic turbine protective device, hydraulic turbine relay control contact 13 through its analog quantity output port D/A 12 and digital quantity output port D/D 18.
Described tach signal survey sensor has three the tunnel, and wherein two tunnel signal acquisition point is located at generator shaft 3 places, is fluted disc frequency measurement sensor 1,2, and one tunnel signal acquisition point is located at generator windings 19 voltage outputs place, is residual voltage frequency measurement sensor 6.
Described rotating speed signal device adopts the high FX of reliability
2NSeries is the core control element as Programmable Logic Controller 10, in system principle Fig. 1,1,2 is fluted disc frequency measurement sensor (SSG1, SSG2), and detection range generally can be 8mm, response frequency 1KHZ, on-the-spot mounting distance guarantee can guarantee requirement at 4mm ± 0.5mm.6 is residual voltage frequency measurement sensor, is arranged on generator outlet, and the voltage signal of being got is between general work scope 0.3V～150V.PLC programmable controller 10 is the control core, and control program portion is within it finished.
The frequency measurement principle.
What no matter be that fluted disc frequency measurement mode (SSG) or its metering system of residual voltage frequency measurement mode (PT) all adopt is to survey all methods, that is: SSG be measuring sonde through the time between tooth and the tooth, be the time of a cycle with routine PT.Concrete measuring principle is as follows:
The principle of measuring is: in the unit interval (300ms), the merchant that n (number of teeth or cycle) and its elapsed time T are counted in the interruption that collects is frequency f.Because rotating speed signal device is mainly used in automatic control flow chart and protection usefulness, and is subjected to the influence of the Ta of unit self,, response time and precision there is high requirement unlike speed regulator so 300ms output once can't influence the normal operation of equipment.
1, three formations of selecting two voting systems.
Make the measured value of SSG1 (fluted disc frequency measurement sensor 1) probe be: Fssg1 (Hz)
Make the measured value of SSG2 (fluted disc frequency measurement sensor 2) probe be: Fssg2 (Hz)
Make the measured value of PT (residual voltage frequency measurement sensor 6) be: Fpt1 (Hz)
Then the measured deviation the during operation of SSG1 and SSG2 is:
ΔF1＝Fssg1-Fssg2
Then the measured deviation the during operation of SSG1 and PT is:
ΔF2＝Fssg1-Fpt1
Then the measured deviation the during operation of SSG2 and PT is:
ΔF3＝Fssg2-Fpt1
When unit is in normal stable operation:
Owing to influenced by the Ta of unit self, the escalating rate of rotating speed under limiting case can not surpass a value, and we are made as it: σ (Hz)
Under the normal condition:
-σ≤Δ F1≤σ; We are designated as condition and satisfy M1 for true
-σ≤Δ F2≤σ; We are designated as condition and satisfy M2 for true
-σ≤Δ F3≤σ; We are designated as condition and satisfy M3 for true
Then Ci Shi output: Ro=M1 ‖ M2 ‖ M3, promptly three signal sources all can be used as normal output, and judged result is normal.
Abnomal condition:
Obviously unusual at this hypothesis SSG2 probe output, then: can get according to following formula:
The data of Δ F1 and Δ F2 can be obviously greater than σ, and then M1 in the condition and M3 are false.
Formula Ro=M1 ‖ M2 ‖ M3=M2
That is: image data appears when unusual as probe SSG2, output just according to the signal of SSG1 and PT output as the foundation of exporting, reliability that greatly can assurance device work.
When signal input sources physical fault occurs and do not have output to judge by software, for example: physical damage appears in SSG, cause pulse-free signal output, PT signal because insurance is violent or broken string all can judge by software, and can make the equipment operate as normal by voting system for improper input signal.So used the device of voting system can improve the reliability of device greatly, can reduce the disorderly closedown that causes because of rotational speed devices greatly.Program flow diagram shown in Figure 2 has illustrated its detection, judgement and control procedure.
Described device adopts the AC and DC dual power supply, can realize not having the disturbance power supply during single channel power down and switch.Red, green two switches on the backboard are respectively the power switch of AC and DC.
Specific requirement:
AC power: AC220V (± 10%)
Direct supply: DC220V (± 10%)
Rotating speed signal device adopts Mitsubishi FX
2NSeries of PLC is as the core control element, and its basic configuration is as follows:
| Project | Content |
| Environment temperature | During use 0～55 ℃ | |
| Ambient humidity | 35～85%RH during use (not dewfall) | |
| Antivibration | JIS C0911 standard, 10～55Hz 0.5mm (maximum 2G), 3 direction of principal axis each 2 hours | |
| Shock resistance | JIS C0912 standard, 10G 3 direction of principal axis each 3 times | |
| Antinoise is disturbed | Producing voltage with the noise Simulation device is 1000V p-p, and pulse width is 1 μ sec, and frequency is the noise of 30-100Hz | |
| Withstand voltage | AC1500V 1 minute | Between all terminals and the earth terminal |
| Insulation resistance | 5M Ω above (DC500V megohmmeter) | |
| Supply voltage | DC24V±10％ | |
| Allow the momentary power failure time | The momentary power failure time works at 10ms | |
| Interrupt source | 8 interrupt sources can satisfy 8 the road and measure simultaneously | |
In addition, also has EEPROM cartridge FX-EEPROM-4 (4K step) as program backup.It writes, does not need when rewriting special-purpose write device, and does not need back-up source.Owing to adopt plugging mode and built-in holding circuit, so reliability is very high.
Input signal (showing as Fig. 1) tests the speed
(1) by the generating unit speed signal of 2 road fluted disc frequency measurement sensors 1,2 (SSG1, SSG2) by shielded cable 5 inputs---measure 24VDC switching value signal, can survey the range of speeds 1～100Hz.
(2) the generating unit speed signal of importing by residual voltage frequency measurement sensor 6 (PT)---range of signal 0.3～150VAC can be surveyed, the range of speeds 7～90Hz can be surveyed.
Checking signal
During verification fluted disc frequency measurement signal, use signal generator to switch through alias, during verification residual voltage frequency measurement signal, the signal generator signal directly can be inserted corresponding residual voltage frequency measurement port.
Output signal
DC24V power supply 8 (working power near switch is provided)
The output of relay idle contact (can be according to the customer requirement adjustment.Default value: 1st, 2,3 are out-of-limit action down, and promptly less than the setting valve action, the 4th, 5,6,7 is last out-of-limit action, promptly greater than the setting valve action), normal opened contact output, output capacity AC250V/5A
The output of duplicate relay idle contact, normal opened contact output (optional)
The output of power transfer relay idle contact, one opens one closes idle contact output, relay excitation when breaking down, output capacity AC250V/5A
Analog quantity output 12.Output voltage wherein: (0～10V) corresponding (0～100Hz); Output current: (4～20mA) corresponding (0～100Hz)
Fault alarm
In the unit running process, when testing the speed one of input signal fault, automatically switch to another drive test speed input signal control output, the power transfer relay action connection point is left, and malfunction indicator lamp is bright.Before fault resetted, the frequency measurement passage that fault took place was invalid.
When the equal fault of rotating speed signal device frequency measurement input signal, the power transfer relay action connection point is left, and malfunction indicator lamp is bright, and demonstration and analog quantity output are reset, and range of speeds indicating relay keeps the state of fault previous moment.
Installation requirement
(1) fluted disc 4 should be fastened on the fluted disc installation place by bolt, and firm welding forbids that axially string is moving simultaneously.
(2) fluted disc frequency measurement sensor 1,2 should be installed firmly, its probe face should be parallel with fluted disc 4 outer tangent planes, and at interval do not exceed 4.0mm～4.5mm with the fluted disc tangent plane, guarantee that simultaneously unit does not exceed the upper and lower end face of fluted disc near the probe face of switch in the whole service process.
(3) fluted disc frequency measurement sensor 1,2 usefulness three core metal shielded cables 5 are connected to the case backboard of rotating speed signal device, and the length of metal sheathed cable is not more than 100m, an end ground connection.
If fluted disc frequency measurement sensor 1,2 wiring errors might cause fluted disc frequency measurement sensor permanent damage, this point must cause user's attention.
If terminal block is correct, the working power of closing rotating speed signal device, in unit running process, can observe the pilot lamp flicker at fluted disc frequency measurement sensor 1,2 places, the charactron display machines class frequency of while rotating speed signal device, otherwise, answer the installation of scrutiny fluted disc and fluted disc frequency measurement sensor, guarantee errorless.
(4) residual voltage frequency measurement sensor 6 input signals need adopt independently shielding line.
(5) power isolation transformer 7 is installed in outside the rotating speed signal device cabinet.Electric power incoming line causes isolating transformer, and output terminal is received rotating speed signal device.
Among Fig. 1,14 is switching input module, and 15 is Display panel, and 16 is range of speeds indicator lamp, and 17 is the frequency nixie display.
Claims (2)
- One kind based on the voting way of output hydraulic turbine rotating speed signal device able to programme, comprise the tach signal survey sensor, be used to receive rotating speed letter measuring-signal and based on this signal and the controller of regulating and controlling rotational speed of water turbine, it is characterized in that: described tach signal survey sensor has multichannel, be three the road or five the tunnel, described controller is a kind ofly to get two or five based on survey multichannel tach signal according to three and get the Programmable Logic Controller of three majority principles voting output control signal; The signal output part of tach signal survey sensor links to each other with the load module of Programmable Logic Controller, and the output module of Programmable Logic Controller links to each other with hydraulic turbine protective device, hydraulic turbine relay control contact through its analog quantity output port D/A and digital quantity output port D/D.
- 2. the hydraulic turbine rotating speed signal device able to programme based on the voting way of output as claimed in claim 1, it is characterized in that: described tach signal survey sensor has three the tunnel, wherein two tunnel signal acquisition point is located at the generator shaft place, be fluted disc frequency measurement sensor, one tunnel signal acquisition point is located at output place of generator windings voltage, is residual voltage frequency measurement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200837473U CN201016985Y (en) | 2007-03-12 | 2007-03-12 | Water turbine programmable rotation rate signal apparatus based on voting output mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200837473U CN201016985Y (en) | 2007-03-12 | 2007-03-12 | Water turbine programmable rotation rate signal apparatus based on voting output mode |
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| CN201016985Y true CN201016985Y (en) | 2008-02-06 |
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| CNU2007200837473U Expired - Fee Related CN201016985Y (en) | 2007-03-12 | 2007-03-12 | Water turbine programmable rotation rate signal apparatus based on voting output mode |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762716B (en) * | 2009-11-27 | 2012-01-11 | 哈尔滨电机厂有限责任公司 | Fluted disc speed measuring device for water turbine generator |
| CN102590542A (en) * | 2011-01-07 | 2012-07-18 | 江西华电电力有限责任公司 | Speed measuring device and speed measuring method for screw expansion power machine |
| CN103345147A (en) * | 2013-07-16 | 2013-10-09 | 青岛四方车辆研究所有限公司 | Motor train unit warning device based on voting mechanism |
| CN103529868A (en) * | 2013-10-29 | 2014-01-22 | 刘强 | Rotational-speed regulating system of water turbine |
| CN104007281A (en) * | 2014-05-15 | 2014-08-27 | 国家电网公司 | Frequency measurement method, device and system for pumped storage unit |
| CN104535788A (en) * | 2015-01-09 | 2015-04-22 | 深圳东方锅炉控制有限公司 | Low-revolution-speed speed measurement and warning device and method |
| CN105129610A (en) * | 2015-08-31 | 2015-12-09 | 中船第九设计研究院工程有限公司 | Large portal crane deviation rectifying method based on multi-voting algorithm |
| CN105204389A (en) * | 2015-10-08 | 2015-12-30 | 武汉聚鑫源机电工程设备有限公司 | Programmable rotating speed signal device based on software and hardware dual TMR type |
| CN107525967A (en) * | 2017-09-18 | 2017-12-29 | 中国长江电力股份有限公司 | A kind of measurement apparatus and method of contactless fluted disc frequency |
| CN109143835A (en) * | 2018-09-10 | 2019-01-04 | 广东小天才科技有限公司 | Based reminding method, smartwatch and storage medium applied to smartwatch |
| CN110308300A (en) * | 2019-06-27 | 2019-10-08 | 厦门盈趣科技股份有限公司 | A kind of rotating speed measurement method and device merging multifrequency nature data |
| CN111366843A (en) * | 2018-12-26 | 2020-07-03 | 平高集团有限公司 | Circuit breaker device and opening and closing detection method and device |
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| CN101762716B (en) * | 2009-11-27 | 2012-01-11 | 哈尔滨电机厂有限责任公司 | Fluted disc speed measuring device for water turbine generator |
| CN102590542A (en) * | 2011-01-07 | 2012-07-18 | 江西华电电力有限责任公司 | Speed measuring device and speed measuring method for screw expansion power machine |
| CN103345147B (en) * | 2013-07-16 | 2015-12-02 | 青岛四方车辆研究所有限公司 | Based on the motor train unit vigilance device of voting mechanism |
| CN103345147A (en) * | 2013-07-16 | 2013-10-09 | 青岛四方车辆研究所有限公司 | Motor train unit warning device based on voting mechanism |
| CN103529868A (en) * | 2013-10-29 | 2014-01-22 | 刘强 | Rotational-speed regulating system of water turbine |
| CN104007281A (en) * | 2014-05-15 | 2014-08-27 | 国家电网公司 | Frequency measurement method, device and system for pumped storage unit |
| CN104535788A (en) * | 2015-01-09 | 2015-04-22 | 深圳东方锅炉控制有限公司 | Low-revolution-speed speed measurement and warning device and method |
| CN105129610A (en) * | 2015-08-31 | 2015-12-09 | 中船第九设计研究院工程有限公司 | Large portal crane deviation rectifying method based on multi-voting algorithm |
| CN105129610B (en) * | 2015-08-31 | 2017-03-29 | 中船第九设计研究院工程有限公司 | A kind of gantry cart method for correcting error based on multiple voting algorithm |
| CN105204389A (en) * | 2015-10-08 | 2015-12-30 | 武汉聚鑫源机电工程设备有限公司 | Programmable rotating speed signal device based on software and hardware dual TMR type |
| CN107525967A (en) * | 2017-09-18 | 2017-12-29 | 中国长江电力股份有限公司 | A kind of measurement apparatus and method of contactless fluted disc frequency |
| CN109143835A (en) * | 2018-09-10 | 2019-01-04 | 广东小天才科技有限公司 | Based reminding method, smartwatch and storage medium applied to smartwatch |
| CN111366843A (en) * | 2018-12-26 | 2020-07-03 | 平高集团有限公司 | Circuit breaker device and opening and closing detection method and device |
| CN110308300A (en) * | 2019-06-27 | 2019-10-08 | 厦门盈趣科技股份有限公司 | A kind of rotating speed measurement method and device merging multifrequency nature data |
| CN110308300B (en) * | 2019-06-27 | 2021-09-21 | 厦门盈趣科技股份有限公司 | Rotating speed measuring method and device fusing multiple characteristic data |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHANGJIANG SANXIA NENGSHIDA ELECTRIC CO., LTD. Free format text: FORMER NAME: WUHAN STARS ELECTRIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 430070 Wuhan City, Hubei Province, Hongshan Bookstore Road, No. 36 Patentee after: Three Gorges Nengshida Electric Co., Ltd. Address before: 430070 Wuhan City, Hubei Province, Hongshan Bookstore Road, No. 36 Patentee before: Wuhan Stars Electric Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 Termination date: 20160312 |