CN214787805U - Double-drive electric variable pitch control system of wind turbine generator - Google Patents
Double-drive electric variable pitch control system of wind turbine generator Download PDFInfo
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- CN214787805U CN214787805U CN202120463280.5U CN202120463280U CN214787805U CN 214787805 U CN214787805 U CN 214787805U CN 202120463280 U CN202120463280 U CN 202120463280U CN 214787805 U CN214787805 U CN 214787805U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses a two electronic pitch control systems that drive of wind turbine generator system, this system include main control unit, main drive ware, main motor, the main position velocity sensor that electricity links to each other in proper order, main motor, main reducer, the pitch bearing of mechanical connection in proper order, main position velocity sensor links to each other with the main drive ware electricity, still includes from driver, slave motor, from the reduction gear, the main drive ware, from the driver, from the motor electricity in proper order link to each other, from the motor, from the reduction gear, the pitch bearing is mechanical connection in proper order. The utility model provides a big tooth stress concentration, the monodentate load that prior art exists higher, wear and tear serious fatigue damage even, endanger fan safety scheduling problem.
Description
Technical Field
The utility model relates to a wind generating set becomes oar control technical field, specifically is a wind generating set double-drive electric pitch control system.
Background
The wind generating set comprises a wind wheel and a generator; the wind wheel comprises blades, a hub, a reinforcing member and the like; it has the functions of wind driven blade rotation to generate electricity, generator head rotation, etc. The wind power generation power supply comprises a wind generating set, a tower frame for supporting the generating set, a storage battery charging controller, an inverter, an unloader, a grid-connected controller, a storage battery pack and the like.
As the land economy can develop less and less wind resources, compared with the land wind power, the offshore wind power has the advantages of large wind energy content, small wind shear, low turbulence, small influence on the environment and the like, and the global wind power plant construction has a trend from land to offshore. At present, offshore wind power is developing towards large-scale units in China, and a pitch system is used as an important component of a control system of a wind generating set, has the functions of adjusting wind wheel input power, performing pneumatic braking and the like, and directly influences the performance and safety of the wind generating set.
The existing pitch control system adopts a single driver to drive a single motor, and then the single motor drives a pitch control bearing through a single pitch control reduction gearbox so as to drive the whole blade to execute pitch control operation. In the process, the small teeth of the variable pitch reduction box only act on a plurality of large teeth of the variable pitch bearing, and the large teeth need to bear the load of the whole blade, so that the stress concentration, the serious abrasion and even the fatigue damage of the large teeth are easily caused, and the variable pitch can not be realized under extreme conditions, thereby endangering the safety of the fan.
Therefore, a new control technology capable of reducing the load of the single tooth of the pitch bearing and improving the safety of the wind turbine generator is needed.
Disclosure of Invention
For overcoming the not enough of prior art, the utility model provides a wind turbine generator system drives electronic pitch control system doubly solves big tooth stress concentration, the single tooth load that prior art exists higher, the serious fatigue damage even of wearing and tearing, endangers fan safety scheduling problem.
The utility model provides a technical scheme that above-mentioned problem adopted is:
the utility model provides a wind turbine generator system double-drive electronic becomes oar control system, includes main control unit, main drive ware, main motor, the main position velocity sensor that links to each other electrically in proper order, main motor, main reducer, the oar bearing that becomes that mechanical connection in proper order, main position velocity sensor links to each other with the main drive ware electricity, still includes from driver, slave motor, from the reduction gear, main drive ware, from the motor electricity in proper order links to each other, from the motor, from the reduction gear, become the oar bearing and mechanically connect in proper order.
The main controller, the main driver, the main motor, the main speed reducer and the pitch bearing form a main driving loop, the main controller, the main driver (one part of the main driver), the slave driver, the slave motor, the slave speed reducer and the pitch bearing form a slave driving loop, the double driving loops share large tooth stress concentration, single tooth load is reduced, serious wear and even fatigue damage of large teeth are effectively reduced, and fan safety is improved.
As a preferred technical scheme, the master driver includes a position speed signal conversion module, and a position controller, a speed controller, a current controller, a master power converter, and a master current sensor that are electrically connected in sequence, an input end of the position speed signal conversion module is connected to an output end of the master position speed sensor, an output end of the position speed signal conversion module is electrically connected to an input end of the position controller and an input end of the speed controller, respectively, the slave driver includes a slave current controller, a slave power converter, and a slave current sensor that are electrically connected in sequence, an output end of the speed controller is electrically connected to an input end of the slave current controller, and an output end of the slave current sensor is electrically connected to an input end of the slave current controller and a slave motor, respectively.
Position loop control is realized by comparing a position control command given by a main control controller with an actual position value of a main motor, speed loop control is realized by comparing a speed given command of the position loop with an actual speed value of the main motor, and main current loop control is realized by comparing a current given command of the speed loop with an actual current value of the main motor; the slave current controller realizes slave current loop control by comparing the received current instruction control (slave set torque instruction) with the received actual current value of the slave motor, and the slave motor drives the slave speed reducer to act so as to drive the blade bearing to act. Therefore, double-drive electric variable-pitch torque synchronization is realized, the stress of a variable-pitch bearing is reduced, the load of a single tooth is reduced, and the safety and the reliability of a variable-pitch system are improved.
Preferably, the position controller is further configured to feed back actual position information to the main controller, and the main controller is further configured to receive the actual position information. Therefore, the actual position information in the loop can be timely acquired by the main controller, the main controller is endowed with the function of monitoring the actual position information of the loop, the actual variable pitch control condition is more conveniently controlled, and the control is more accurately facilitated.
As a preferred technical solution, the slave driver further includes a speed limiter electrically connected to the output terminal of the position controller and the input terminal of the slave power converter, respectively.
The speed limiter is used for receiving the speed instruction sent by the position controller and outputting the limited speed instruction.
The speed instruction of the main driving loop after passing through the position loop controller is given to the slave power converter after passing through the speed amplitude limiter, the current control instruction (slave set torque instruction) output by the main driving loop after passing through the current loop controller is directly transmitted to the slave driver, and the slave driver controls the action of the slave motor according to the received speed amplitude limiting instruction and the received current instruction (slave set torque instruction), so that the torque synchronization and anti-backlash control of the rotating speed amplitude limiting of the double-drive electric variable pitch belt are realized, the stress of a variable pitch bearing is further reduced, the single-tooth load is reduced, and the safety and the reliability of the variable pitch system are improved.
As a preferred technical solution, the master power converter and/or the slave power converter is a PWM inverter.
The PWM inverter has the advantages of high regulation speed, good power factor and simple structure.
As a preferred technical solution, the main position and speed sensor is a rotary transformer.
The rotary transformer is a precise angle, position and speed detection device, and is particularly suitable for occasions where a rotary encoder cannot work normally, such as high-temperature, high-dust, severe cold, moist, high-speed and high-vibration rotary encoders and the like. The device has the advantages of high monitoring precision, simple structure, sensitive action, reliable work, low requirement on environmental conditions (especially in places with high temperature and high dust), large output signal amplitude and strong anti-interference capability. And the device is applied to a main driving loop, so that the simultaneous position and speed detection is facilitated, and the integration degree is improved.
As a preferable technical scheme, the device further comprises a slave position speed sensor electrically connected with the slave motor.
The slave position and speed sensor is arranged to facilitate the switching of the master drive circuit and the slave drive circuit. When the master drive circuit and the slave drive circuit are required to be switched, the original master drive circuit is easily switched to the slave drive circuit, and the original slave drive circuit is easily switched to the master drive circuit.
As a preferred technical solution, the slave position and speed sensor is a resolver.
The rotary transformer is a precise angle, position and speed detection device, and is particularly suitable for occasions where a rotary encoder cannot work normally, such as high-temperature, high-dust, severe cold, moist, high-speed and high-vibration rotary encoders and the like. The device has the advantages of high monitoring precision, simple structure, sensitive action, reliable work, low requirement on environmental conditions (especially in places with high temperature and high dust), large output signal amplitude and strong anti-interference capability. When the original main driving loop is switched to the slave driving loop and the original slave driving loop is switched to the main driving loop, auxiliary feedback and correction of position and speed detection information are facilitated, and control is more accurate.
As a preferred technical scheme, the system also comprises a variable pitch controller, wherein the main controller, the variable pitch controller and the position controller are electrically connected in sequence.
The variable pitch controller plays a role in transferring and correcting position information, so that the position control instruction can be conveniently regulated and controlled, and more I/O point positions can be conveniently provided.
Compared with the prior art, the utility model, following beneficial effect has:
(1) the utility model adopts the double-drive loop to share the stress concentration of the big teeth, reduces the load of the single tooth, effectively reduces the serious wear and even fatigue damage of the big teeth, and improves the safety of the fan;
(2) the utility model realizes the torque synchronization and anti-backlash control of the double-drive electric variable-pitch belt rotating speed amplitude limiting;
(3) the utility model discloses further reduce the variable pitch bearing stress, reduce the single tooth load, improve the security and the reliability of variable pitch system;
(4) the utility model has the advantages of fast adjusting speed, good power factor and simple structure;
(5) the utility model is convenient for detecting position and speed at the same time, and the integration degree is improved;
(6) the utility model has the advantages of high monitoring precision, simple structure, sensitive action, reliable work, low requirement on environmental conditions, large output signal amplitude and strong anti-interference capability, improved integration degree and more accurate control;
(7) the utility model discloses the regulation and control of position control instruction of being convenient for also is convenient for provide more IO points.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
It is worth mentioning that: 1) in the utility model, the main motor and the slave motor can be selected from motors with position, speed and current sensor modules, which belongs to the prior art and can be used as a preference, therefore, the detailed construction and work of the main motor and the slave motor are not detailed in the technical scheme; 2) the electrical connection in the present invention includes both direct electrical connection and electrical connection through intermediate components, and the particular electrical connection shown should not be considered as limiting the electrical connection; 3) the utility model discloses in, electric parts such as relevant controller, relevant module itself relates to functions such as software processing, signal processing all belong to prior art, the utility model discloses do not relate to improvements such as their software processing, application method, the utility model discloses innovation point lies in having increased from drive circuit and main drive circuit and from the cooperation work in drive circuit, consequently, the utility model discloses accord with the object that can grant patent right of patent law regulation.
Examples
As shown in fig. 1 and 2, the double-drive electric pitch control system of the wind turbine generator comprises a main controller, a main driver, a main motor, a main position speed sensor, a main motor, a main speed reducer and a pitch bearing, wherein the main controller, the main driver, the main speed reducer and the pitch bearing are electrically connected in sequence, the main motor, the main speed reducer and the pitch bearing are mechanically connected in sequence, the main position speed sensor is electrically connected with the main driver, the slave motor and the slave speed reducer are electrically connected in sequence, and the slave motor, the slave speed reducer and the pitch bearing are mechanically connected in sequence.
In operation, the system performs the following steps:
s1, the main controller sends a position control command to the main driver;
s2, the main driver receives a position control command, drives the main motor to work by combining the actual position information and the actual speed information of the main motor fed back by the main position speed sensor, and controls the slave driver to drive the slave motor to work;
s3, the main motor drives the main speed reducer to work, and the auxiliary motor drives the auxiliary speed reducer to work;
s4, the main position speed sensor detects and outputs the actual position information and the actual speed information of the main motor to the main driver;
and S5, the main speed reducer drives the pitch bearing to work, and the auxiliary speed reducer drives the pitch bearing to work.
It should be noted that the above steps are not in a single order, as the operation of the system is dynamic, the flow of electrical signals is dynamic, and there is feedback.
The main controller, the main driver, the main motor, the main speed reducer and the pitch bearing form a main driving loop, the main controller, the main driver (one part of the main driver), the slave driver, the slave motor, the slave speed reducer and the pitch bearing form a slave driving loop, the double driving loops share large tooth stress concentration, single tooth load is reduced, serious wear and even fatigue damage of large teeth are effectively reduced, and fan safety is improved. Preferably, the master drive circuit and the slave drive circuit share half of the stress of the large teeth.
As a preferred technical scheme, the master driver includes a position speed signal conversion module, and a position controller, a speed controller, a current controller, a master power converter, and a master current sensor that are electrically connected in sequence, an input end of the position speed signal conversion module is connected to an output end of the master position speed sensor, an output end of the position speed signal conversion module is electrically connected to an input end of the position controller and an input end of the speed controller, respectively, the slave driver includes a slave current controller, a slave power converter, and a slave current sensor that are electrically connected in sequence, an output end of the speed controller is electrically connected to an input end of the slave current controller, and an output end of the slave current sensor is electrically connected to an input end of the slave current controller and a slave motor, respectively.
In operation, the preferred embodiment performs a more detailed procedure relative to the above, as follows:
step S1 specifically includes the following steps:
k1, the main controller sends a position control command to the position controller;
step S2 specifically includes the following steps:
k2, the position controller receives the position control instruction, and sends a speed instruction to the speed controller by combining the actual position information of the main motor fed back by the main position speed sensor and the position speed signal conversion module in sequence;
k3, the speed controller receives the speed command, and sends a torque command to the main current controller and the slave current controller by combining the actual speed information of the main motor fed back by the main position speed sensor and the position speed signal conversion module in sequence;
k4, the main current controller receives the torque instruction, and sends an output signal to the control main power converter in combination with the actual current information of the main motor output by the main current sensor;
k5, the main power converter receives the output signal sent by the main current controller and outputs the current information after power conversion to the main current sensor;
k6, the main current sensor receives the current information output by the main power converter, detects the actual current information of the main motor and feeds the actual current information of the main motor back to the input end of the main current controller;
k7, a position and speed signal conversion module receives and converts the actual position information and the actual speed information of the main motor fed back by the main position and speed sensor, transmits the actual position information to the input end of the position controller, and transmits the actual speed information to the input end of the speed controller;
k8, receiving a torque command from the current controller, and sending an output signal to the control slave power converter by combining with the actual current information of the slave motor fed back from the current sensor;
k9, receiving the output signal sent from the current controller from the power converter, and outputting the current information after power conversion to the slave current sensor;
k10, receiving the current information output from the power converter from the current sensor, detecting the actual current information of the slave motor and feeding the actual current information of the slave motor back to the input end of the slave current controller;
step S4 specifically includes the following steps:
k11, the main position speed sensor detects and outputs the actual position information and the actual speed information of the main motor to the position speed signal conversion module.
It should be noted that the above steps are not in a single order, as the operation of the system is dynamic, the flow of electrical signals is dynamic, and there is feedback.
Position loop control is realized by comparing a position control command given by a main control controller with an actual position value of a main motor, speed loop control is realized by comparing a speed given command of the position loop with an actual speed value of the main motor, and main current loop control is realized by comparing a current given command of the speed loop with an actual current value of the main motor; the slave current controller realizes slave current loop control by comparing the received current instruction control (slave set torque instruction) with the received actual current value of the slave motor, and the slave motor drives the slave speed reducer to act so as to drive the blade bearing to act. Therefore, double-drive electric variable-pitch torque synchronization is realized, the stress of a variable-pitch bearing is reduced, the load of a single tooth is reduced, and the safety and the reliability of a variable-pitch system are improved.
It should be noted that the current loop control, the speed loop control, and the position loop control (the three-loop control) are known in the art, and the teaching materials and documents related to the three-loop control system are mostly recorded, and the invention of the present invention is not the three-loop control itself, and therefore, the structure and the operation principle thereof are not described in detail.
Preferably, the position controller is further configured to feed back actual position information to the main controller, and the main controller is further configured to receive the actual position information. Therefore, the actual position information in the loop can be timely acquired by the main controller, the main controller is endowed with the function of monitoring the actual position information of the loop, the actual variable pitch control condition is more conveniently controlled, and the control is more accurately facilitated.
As a preferred technical solution, the slave driver further includes a speed limiter electrically connected to the output terminal of the position controller and the input terminal of the slave power converter, respectively.
The speed limiter is used for receiving the speed instruction sent by the position controller and outputting the limited speed instruction.
The speed instruction of the main driving loop after passing through the position loop controller is given to the slave power converter after passing through the speed amplitude limiter, the current control instruction (slave set torque instruction) output by the main driving loop after passing through the current loop controller is directly transmitted to the slave driver, and the slave driver controls the action of the slave motor according to the received speed amplitude limiting instruction and the received current instruction (slave set torque instruction), so that the torque synchronization and anti-backlash control of the rotating speed amplitude limiting of the double-drive electric variable pitch belt are realized, the stress of a variable pitch bearing is further reduced, the single-tooth load is reduced, and the safety and the reliability of the variable pitch system are improved.
In the embodiment, the current of the main driving loop is transmitted to the auxiliary driving loop, the load borne by the main/auxiliary motor is distributed, and the torque difference value of the main/auxiliary driving loop can be controlled to be below 5%; meanwhile, amplitude limiting control is carried out on the speed set value transmitted from the main driving loop to the auxiliary driving loop, the tooth gap error inevitably existing in the assembling and manufacturing process of the speed reducer is eliminated, the condition that only one motor is actually contacted and acted with the teeth of the speed reducer in the actual operation process is avoided, the rotating speed difference value of the main driving loop and the auxiliary driving loop is controlled to be below 5%, torque synchronous control in the rotating speed limit of the main motor and the auxiliary motor is achieved, the fatigue load and the limit load of single teeth of the variable-pitch bearing are reduced, the damage rate of the variable-pitch bearing caused by overlarge stress of the single teeth is reduced, and the safety and reliability of the wind turbine generator are improved.
As a preferred technical solution, the master power converter and/or the slave power converter is a PWM inverter.
The PWM inverter has the advantages of high regulation speed, good power factor and simple structure.
As a preferred technical solution, the main position and speed sensor is a rotary transformer.
The rotary transformer is a precise angle, position and speed detection device, and is particularly suitable for occasions where a rotary encoder cannot work normally, such as high-temperature, high-dust, severe cold, moist, high-speed and high-vibration rotary encoders and the like. The device has the advantages of high monitoring precision, simple structure, sensitive action, reliable work, low requirement on environmental conditions (especially in places with high temperature and high dust), large output signal amplitude and strong anti-interference capability. And the device is applied to a main driving loop, so that the simultaneous position and speed detection is facilitated, and the integration degree is improved.
As a preferable technical scheme, the device further comprises a slave position speed sensor electrically connected with the slave motor.
The slave position and speed sensor is arranged to facilitate the switching of the master drive circuit and the slave drive circuit. When the master drive circuit and the slave drive circuit are required to be switched, the original master drive circuit is easily switched to the slave drive circuit, and the original slave drive circuit is easily switched to the master drive circuit.
As a preferred technical solution, the slave position and speed sensor is a resolver.
The rotary transformer is a precise angle, position and speed detection device, and is particularly suitable for occasions where a rotary encoder cannot work normally, such as high-temperature, high-dust, severe cold, moist, high-speed and high-vibration rotary encoders and the like. The device has the advantages of high monitoring precision, simple structure, sensitive action, reliable work, low requirement on environmental conditions (especially in places with high temperature and high dust), large output signal amplitude and strong anti-interference capability. When the original main driving loop is switched to the slave driving loop and the original slave driving loop is switched to the main driving loop, auxiliary feedback and correction of position and speed detection information are facilitated, and control is more accurate.
As a preferred technical scheme, the system also comprises a variable pitch controller, wherein the main controller, the variable pitch controller and the position controller are electrically connected in sequence.
The variable pitch controller plays a role in transferring and correcting position information, so that the position control instruction can be conveniently regulated and controlled, and more I/O point positions can be conveniently provided.
It is worth mentioning that, as a preferred solution, the communication protocol between the pitch controller and the master drive includes, but is not limited to, one or a combination of CanOpen, Profibus, and RS 485.
The variable pitch controller receives the control instruction of the master control controller through the communication protocol and feeds back the actual state of the variable pitch to the master controller, so that the control coordination of the system is improved, and the communication faults of the system are reduced.
It should be noted that, as a preferred technical solution, the communication protocol between the master driver and the slave driver includes, but is not limited to, one or a combination of multiple buses, ETHcat, CanOpen, Profibus, and RS 485.
The master driver sends the speed limit value, the current value and the control word to the slave driver through the communication protocol, and the slave driver feeds back the state of the slave driver to the master driver in time through the communication protocol. Multi-axis bus communication may be preferred for 1 ms.
It is worth noting that it may be preferable that the master drive circuit and the slave drive circuit may be selectively switched in the control software.
It is worth mentioning that, as a preferred technical solution, the pitch controller is a separate pitch controller, a pitch controller with a separate control card, or is built in the main drive.
The selectable mounting position and the actual structure of the variable pitch controller are more diversified, and the variable pitch controller is convenient to adapt to wider application scenes.
The main scheme and the further selection schemes of the utility model can be freely combined to form a plurality of schemes, which are the schemes that can be adopted and claimed by the utility model; and the utility model discloses also can the independent assortment between (each non-conflict selection) selection and between other choices. The technical solutions to be protected by the present invention, which are various combinations that can be known to those skilled in the art based on the prior art and the common general knowledge after understanding the present invention, are not exhaustive herein.
As described above, the present invention can be preferably realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and the technical essence of the present invention is that within the spirit and principle of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments are all within the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a wind turbine generator system double-drive electronic becomes oar control system, its characterized in that includes main control unit, main drive ware, main motor, the master position velocity sensor that consecutive electricity links to each other, main motor, main reduction gear, the oar bearing of becoming of mechanical connection in proper order, main position velocity sensor links to each other with the main drive ware electricity, still includes from driver, follow motor, follow reduction gear, main drive ware, follow motor are consecutive electricity and are linked to each other, follow motor, follow reduction gear, become oar bearing and mechanical connection in proper order.
2. The wind turbine generator double-drive electric pitch control system according to claim 1, the main driver comprises a position and speed signal conversion module, and a position controller, a speed controller, a current controller, a main power converter and a main current sensor which are electrically connected in sequence, the input end of the position and speed signal conversion module is connected with the output end of the main position and speed sensor, the output end of the position and speed signal conversion module is respectively and electrically connected with the input end of the position controller and the input end of the speed controller, the slave driver comprises a slave current controller, a slave power converter and a slave current sensor which are electrically connected in sequence, the output end of the speed controller is electrically connected with the input end of the slave current controller, and the output end of the slave current sensor is electrically connected with the input end of the slave current controller and the slave motor respectively.
3. The dual-drive electric pitch control system for the wind turbine generator according to claim 2, wherein the slave driver further comprises a speed limiter electrically connected to an output of the position controller and an input of the slave power converter.
4. The wind turbine generator double-drive electric pitch control system according to claim 2, wherein the master power converter and/or the slave power converter is a PWM inverter.
5. The wind turbine generator system dual-drive electric pitch control system according to claim 2, wherein the main position speed sensor is a rotary transformer.
6. The dual-drive electric pitch control system for the wind turbine generator according to claim 2, further comprising a slave position and speed sensor electrically connected to the slave motor.
7. The wind turbine generator system double-drive electric pitch control system according to claim 6, wherein the slave position speed sensor is a rotary transformer.
8. The double-drive electric variable pitch control system of the wind turbine generator according to any one of claims 2 to 7, further comprising a variable pitch controller, wherein the main controller, the variable pitch controller and the position controller are electrically connected in sequence.
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| CN202120463280.5U CN214787805U (en) | 2021-03-03 | 2021-03-03 | Double-drive electric variable pitch control system of wind turbine generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506955A (en) * | 2022-11-24 | 2022-12-23 | 东方电气风电股份有限公司 | Double-drive variable pitch system of wind turbine generator and synchronous control method thereof |
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2021
- 2021-03-03 CN CN202120463280.5U patent/CN214787805U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506955A (en) * | 2022-11-24 | 2022-12-23 | 东方电气风电股份有限公司 | Double-drive variable pitch system of wind turbine generator and synchronous control method thereof |
| CN115506955B (en) * | 2022-11-24 | 2023-01-31 | 东方电气风电股份有限公司 | Double-drive variable pitch system of wind turbine generator and synchronous control method thereof |
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Address after: 618099 No.99, Zhujiang East Road, Jingyang District, Deyang City, Sichuan Province Patentee after: Dongfang Electric Wind Power Co.,Ltd. Address before: 618099 No.99, Zhujiang East Road, Jingyang District, Deyang City, Sichuan Province Patentee before: DONGFANG ELECTRIC WIND POWER Co.,Ltd. |