CN217159365U - Fan variable pitch system - Google Patents
Fan variable pitch system Download PDFInfo
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- CN217159365U CN217159365U CN202123455990.2U CN202123455990U CN217159365U CN 217159365 U CN217159365 U CN 217159365U CN 202123455990 U CN202123455990 U CN 202123455990U CN 217159365 U CN217159365 U CN 217159365U
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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
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The application provides a fan becomes oar system, wherein, this system includes: the system comprises a first battery pack, a battery management system for measuring and controlling the battery pack, an alternating current-direct current converter for converting alternating current into direct current and a variable pitch controller for controlling a variable pitch motor; the first end of the first battery pack is connected with the positive pole of the alternating current power supply, the second end of the first battery pack is connected with the negative pole of the alternating current power supply, and the third end of the first battery pack is connected with one end of the battery management system; the other end of the battery management system is connected with the first end of the variable pitch controller; the first end of the AC-DC converter is connected with the anode of the AC power supply, and the second end of the AC-DC converter is connected with the cathode of the AC power supply; the third end of the alternating current-direct current converter is connected with one end of the battery management system; the second end of the variable pitch controller is connected with the positive electrode of the alternating current power supply, and the third end of the variable pitch controller is connected with the negative electrode of the alternating current power supply.
Description
Technical Field
The application relates to the technical field of wind power generation, in particular to a fan variable pitch system.
Background
A traditional wind turbine generator system pitch system adopts a lead-acid storage battery as a main power supply and a standby power supply and is limited by the multiplying power and capacity characteristics of the lead-acid storage battery, each blade of the traditional wind turbine generator system needs to be matched with a group of pitch system power supply energy storage equipment independently, and one wind turbine needs to be matched with 3 groups of energy storage equipment with the same capacity to meet the requirement of emergency standby. Therefore, the energy storage equipment of the fan pitch system in the prior art has the technical problems of small charge and discharge multiplying power and small capacity.
Disclosure of Invention
An object of the embodiment of the application is to provide a fan becomes oar system, has solved among the prior art fan becomes oar system energy storage device charge-discharge multiplying power little and the little technical problem of capacity. The specific technical scheme is as follows:
the application provides a fan becomes oar system, the system includes: the system comprises a first battery pack, a battery management system for measuring and controlling the battery pack, an alternating current-direct current converter for converting alternating current into direct current and a variable pitch controller for controlling a variable pitch motor; the first battery pack comprises a plurality of lithium titanate batteries connected in series; the first end of the first battery pack is connected with the positive pole of the alternating current power supply, the second end of the first battery pack is connected with the negative pole of the alternating current power supply, and the third end of the first battery pack is connected with one end of the battery management system; the other end of the battery management system is connected with the first end of the variable pitch controller; the first end of the AC-DC converter is connected with the anode of the AC power supply, and the second end of the AC-DC converter is connected with the cathode of the AC power supply; the third end of the alternating current-direct current converter is connected with one end of the battery management system; the second end of the variable pitch controller is connected with the positive electrode of the alternating current power supply, and the third end of the variable pitch controller is connected with the negative electrode of the alternating current power supply.
According to the fan variable pitch system provided by the embodiment of the application, the first battery pack, the battery management system for measuring and controlling the battery pack, the alternating current-direct current converter for converting alternating current into direct current and the variable pitch controller for controlling the variable pitch motor are adopted; the first battery pack comprises a plurality of lithium titanate batteries connected in series; the first end of the first battery pack is connected with the positive pole of the alternating current power supply, the second end of the first battery pack is connected with the negative pole of the alternating current power supply, and the third end of the first battery pack is connected with one end of the battery management system; the other end of the battery management system is connected with the first end of the variable pitch controller; the first end of the AC-DC converter is connected with the anode of the AC power supply, and the second end of the AC-DC converter is connected with the cathode of the AC power supply; the third end of the alternating current-direct current converter is connected with one end of the battery management system; the second end of the variable pitch controller is connected with the positive electrode of the alternating current power supply, and the third end of the variable pitch controller is connected with the negative electrode of the alternating current power supply; that is to say, the lead-acid battery is replaced by the lithium titanate battery with large charge-discharge multiplying power, large capacity and high reliability, so that the technical problems of small charge-discharge multiplying power and small capacity of the energy storage equipment of the fan pitch system in the prior art are solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic structural diagram of a pitch system of a wind turbine according to an embodiment of the present application;
FIG. 2 is a second schematic structural diagram of a pitch system of a wind turbine according to an embodiment of the present application;
FIG. 3 is a third schematic structural diagram of a pitch system of a wind turbine according to an embodiment of the present application;
FIG. 4 is a fourth schematic structural diagram of a pitch system of a wind turbine in an embodiment of the present application;
FIG. 5 is a flowchart of a method for controlling a pitch system of a wind turbine in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, suffixes such as "module", "unit" used to denote elements are used only for facilitating the explanation of the present application and have no specific meaning by themselves. Thus, "module" and "component" may be used in a mixture.
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The embodiment of the application provides a fan becomes oar system, as shown in fig. 1, this system includes: the system comprises a first battery pack, a battery management system for measuring and controlling the battery pack, an alternating current-direct current converter for converting alternating current into direct current and a variable pitch controller for controlling a variable pitch motor; the first battery pack comprises a plurality of lithium titanate batteries connected in series;
the first end of the first battery pack is connected with the positive pole of the alternating current power supply, the second end of the first battery pack is connected with the negative pole of the alternating current power supply, and the third end of the first battery pack is connected with one end of the battery management system; the other end of the battery management system is connected with the first end of the variable pitch controller;
the first end of the AC-DC converter is connected with the anode of the AC power supply, and the second end of the AC-DC converter is connected with the cathode of the AC power supply; the third end of the alternating current-direct current converter is connected with one end of the battery management system;
the second end of the variable pitch controller is connected with the positive electrode of the alternating current power supply, and the third end of the variable pitch controller is connected with the negative electrode of the alternating current power supply.
The first battery pack comprises a plurality of lithium titanate batteries connected in series, and compared with the traditional lead-acid battery, the lithium titanate batteries have the advantages of large charge-discharge rate, large capacity, high reliability, low installation and maintenance cost and the like; the variable pitch system controls the output torque and power by controlling the windward angle of the blades of the wind driven generator, so that the output power of the wind driven generator is controlled, and the output power of the wind driven generator keeps an optimal power curve; the variable pitch system must be equipped with a battery pack to ensure that when a unit has a major accident, such as an alternating current power supply outage, the variable pitch system can still supply power through the battery pack to ensure that blades of the wind driven generator can be feathered to a 90-degree limiting position, so that the wind driven generator can be safely shut down.
According to the system, the first battery pack, the battery management system used for measuring and controlling the battery pack, the alternating current-direct current converter used for converting alternating current into direct current and the variable pitch controller used for controlling the variable pitch motor are adopted; the first battery pack comprises a plurality of lithium titanate batteries connected in series; the first end of the first battery pack is connected with the positive pole of the alternating current power supply, the second end of the first battery pack is connected with the negative pole of the alternating current power supply, and the third end of the first battery pack is connected with one end of the battery management system; the other end of the battery management system is connected with the first end of the variable pitch controller; the first end of the AC-DC converter is connected with the anode of the AC power supply, and the second end of the AC-DC converter is connected with the cathode of the AC power supply; the third end of the alternating current-direct current converter is connected with one end of the battery management system; the second end of the variable pitch controller is connected with the positive electrode of the alternating current power supply, and the third end of the variable pitch controller is connected with the negative electrode of the alternating current power supply. Therefore, in the embodiment of the application, the first battery pack comprises a plurality of lithium titanate batteries connected in series, and compared with the traditional lead-acid battery, the lithium titanate batteries have the characteristics of large charge and discharge multiplying power and large capacity, so that the technical problems of small charge and discharge multiplying power and small capacity of energy storage equipment of a fan pitch system in the prior art are solved.
In an optional implementation manner of the embodiment of the present application, as shown in fig. 2, the pitch system of the wind turbine provided in the embodiment of the present application includes: a second battery pack; wherein the second battery pack comprises a plurality of lithium titanate batteries connected in series;
the first end of the second battery pack is connected with the positive pole of the alternating current power supply, the second end of the second battery pack is connected with the negative pole of the alternating current power supply, and the third end of the second battery pack is connected with one end of the battery management system.
The second battery pack is used as a standby power supply to supply power to the variable pitch system under the condition that the alternating current power supply is cut off or the first battery pack fails, so that the blades of the wind driven generator can be feathered to a 90-degree limiting position, and the wind driven generator can be safely shut down.
Therefore, the fan variable pitch system provided by the embodiment of the application has the standby power supply, and the wind driven generator can still be ensured to be safely shut down under the condition that the alternating current power supply is powered off or the first battery pack fails.
In an optional implementation manner of the embodiment of the present application, as shown in fig. 3, the battery management system of a wind turbine pitch system provided in the embodiment of the present application includes: the device comprises a first data acquisition unit, a second data acquisition unit and a control circuit;
one end of the first data acquisition unit is connected with the third end of the first battery pack, and the other end of the first data acquisition unit is connected with the first end of the control circuit;
one end of the second data acquisition unit is connected with the third end of the second battery pack, and the other end of the second data acquisition unit is connected with the first end of the control circuit;
the second end of the control circuit is connected with the third end of the alternating current-direct current converter;
and the third end of the control circuit is connected with the third end of the variable pitch controller.
It should be noted that a Battery Management System (BMS) is used to manage and maintain each Battery unit, prevent the Battery from being overcharged and overdischarged, prolong the service life of the Battery, and monitor the state of the Battery; the first data acquisition unit and the second data acquisition unit are used for acquiring battery information of the battery pack in the charging and discharging process, and the control circuit is used for managing the battery pack according to the acquired battery information.
Therefore, the fan variable pitch system provided by the embodiment of the application has the battery management system for preventing the battery from being overcharged and overdischarged, and the reliability of the battery pack can be ensured without real-time monitoring.
In an optional implementation manner of the embodiment of the present application, as shown in fig. 4, the first battery pack of the fan pitch system provided in the embodiment of the present application includes: 4 battery modules in 36 strings and 1 battery module in 12 strings; wherein, the 36 strings of battery modules are connected in series with the 12 strings of battery modules; the 36-string battery module comprises 36 logic single batteries connected in series; the 12 strings of battery modules include 12 logic unit batteries connected in series.
The single battery can be a cylindrical lithium titanate battery with 2.3V/9Ah, and 4 battery modules with 36 strings and 1 battery module with 12 strings are connected in series to form a battery system with 358.8V/9Ah/3.2292 kWh; 1 battery module of 12 strings and 1 battery module of 36 strings correspond 1 from accuse module (BSU for short) jointly, and 3 battery modules of 36 strings correspond 1 from accuse module respectively in addition.
Therefore, the energy storage system of the fan variable pitch system provided by the embodiment of the application is a 358.8V/9Ah/3.2292kWh battery system composed of lithium titanate batteries.
In an optional implementation manner of the embodiment of the present application, as shown in fig. 4, the second battery pack of the wind turbine pitch system provided in the embodiment of the present application includes: 4 battery modules in 36 strings and 1 battery module in 12 strings; wherein, the 36 strings of battery modules are connected in series with the 12 strings of battery modules; the 36-string battery module comprises 36 logic single batteries connected in series; the 12-string battery module comprises 12 logic single batteries connected in series.
The single battery can be a cylindrical lithium titanate battery with 2.3V/9Ah, and 4 battery modules with 36 strings and 1 battery module with 12 strings are connected in series to form a battery system with 358.8V/9Ah/3.2292 kWh; 1 battery module of 12 strings and 1 battery module of 36 strings correspond 1 from accuse module (BSU for short) jointly, and 3 battery modules of 36 strings correspond 1 from accuse module respectively in addition.
Therefore, the energy storage system of the fan variable pitch system provided by the embodiment of the application is a 358.8V/9Ah/3.2292kWh battery system composed of lithium titanate batteries.
The fan becomes oar system that this application embodiment provided, as shown in fig. 4, includes: a secondary power distribution system;
the secondary power distribution system comprises a direct current conversion power supply; the direct current conversion power supply is used for supplying power to the secondary equipment;
two ends of the direct current conversion power supply are respectively connected with the positive electrode and the negative electrode of the first battery pack.
Note that the dc conversion power supply converts 358.8V high voltage power of the first battery pack or the second battery pack into 24V low voltage power to supply power to the secondary device.
Therefore, the fan variable pitch system provided by the embodiment of the application is provided with a secondary power distribution system for monitoring, measuring, controlling, protecting and adjusting the primary power distribution system.
The fan becomes oar system that this application embodiment provided, as shown in fig. 4, secondary equipment includes: a charge-discharge controller, a current measuring and protecting device; the charging and discharging motor controller is connected with the first battery pack in series, and the current measuring and protecting device is connected with the first battery pack in series.
The charging and discharging controller comprises a diode and a charging and discharging relay; the charge and discharge controller is used for connecting, breaking and bearing rated working current and overload fault current, and under the condition that the fan variable pitch system has the problems of overcurrent, overvoltage, overtemperature, undervoltage and the like, the BMS master control quickly breaks a circuit to reliably protect the fan variable pitch system; the current measurement and protection device is used for carrying out short-circuit protection and battery pack current measurement.
Therefore, the fan variable pitch system provided by the embodiment of the application can be used for quickly disconnecting the circuit and protecting the fan variable pitch system when the fan variable pitch system has the problems of short circuit, overcurrent and the like.
The fan becomes oar system that this application embodiment provided, as shown in fig. 4, the current measurement includes with protection device: fuses and shunts.
Wherein, it should be noted that the shunt is used for measuring direct current; the fuse is used for fusing a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value.
Therefore, the fan variable pitch system provided by the embodiment of the application can be used for quickly disconnecting the circuit and protecting the fan variable pitch system when the fan variable pitch system has the problems of short circuit, overcurrent and the like.
Based on the wind turbine pitch system in fig. 1 to 4, an embodiment of the present application further provides a control method based on the wind turbine pitch system, and as shown in fig. 5, the method includes:
and step 504, under the condition that the power supply of the alternating current power supply is abnormal, controlling a first battery pack to comprise a plurality of lithium titanate batteries connected in series to supply power to a variable pitch system of the fan.
And 506, under the condition that the power supply of the alternating current power supply and the power supply of the first battery pack are abnormal, controlling the second battery pack to comprise a plurality of lithium titanate batteries connected in series to supply power to the variable pitch system of the fan.
Through the steps 502 to 506, when the alternating current is cut off or any one group of batteries has faults, the energy storage system can provide a stable and reliable standby power supply for the load pitch changing system, the control driver of the pitch changing system enables the blade to return to the zero position, the fan stops running, and the pitch changing function is achieved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims (8)
1. A fan variable pitch system is characterized by comprising a first battery pack, a battery management system for measuring and controlling the battery pack, an alternating current-direct current converter for converting alternating current into direct current and a variable pitch controller for controlling a variable pitch motor; wherein the first battery pack includes a plurality of lithium titanate batteries connected in series;
the first end of the first battery pack is connected with the positive pole of an alternating current power supply, the second end of the first battery pack is connected with the negative pole of the alternating current power supply, and the third end of the first battery pack is connected with one end of the battery management system; the other end of the battery management system is connected with the first end of the variable pitch controller;
the first end of the alternating current-direct current converter is connected with the positive pole of an alternating current power supply, and the second end of the alternating current-direct current converter is connected with the negative pole of the alternating current power supply; the third end of the alternating current-direct current converter is connected with one end of the battery management system;
the second end of the variable pitch controller is connected with the anode of the alternating current power supply, and the third end of the variable pitch controller is connected with the cathode of the alternating current power supply.
2. The wind turbine pitch system of claim 1, further comprising: a second battery pack; wherein the second battery pack includes a plurality of lithium titanate batteries connected in series;
the first end of the second battery pack is connected with the positive pole of the alternating current power supply, the second end of the second battery pack is connected with the negative pole of the alternating current power supply, and the third end of the second battery pack is connected with one end of the battery management system.
3. The wind turbine pitch system of claim 2, wherein the battery management system comprises: the device comprises a first data acquisition unit, a second data acquisition unit and a control circuit;
one end of the first data acquisition unit is connected with the third end of the first battery pack, and the other end of the first data acquisition unit is connected with the first end of the control circuit;
one end of the second data acquisition unit is connected with the third end of the second battery pack, and the other end of the second data acquisition unit is connected with the first end of the control circuit;
the second end of the control circuit is connected with the third end of the alternating current-direct current converter;
and the third end of the control circuit is connected with the third end of the variable pitch controller.
4. The wind turbine pitch system of claim 1, wherein the first battery pack comprises: 4 battery modules in 36 strings and 1 battery module in 12 strings; the 36 strings of battery modules are connected in series with the 12 strings of battery modules; the 36 strings of battery modules comprise 36 logic single batteries connected in series; the 12 strings of battery modules comprise 12 logic single batteries connected in series.
5. The wind turbine pitch system of claim 2, wherein the second battery pack comprises: 4 battery modules in 36 strings and 1 battery module in 12 strings; the 36 strings of battery modules are connected in series with the 12 strings of battery modules; the 36 strings of battery modules comprise 36 logic single batteries connected in series; the 12 strings of battery modules comprise 12 logic single batteries connected in series.
6. The wind turbine pitch system of claim 1, further comprising: a secondary power distribution system; the secondary power distribution system comprises a direct current conversion power supply; the direct current conversion power supply is used for supplying power to secondary equipment;
and two ends of the direct current conversion power supply are respectively connected with the positive electrode and the negative electrode of the first battery pack.
7. The wind turbine pitch system of claim 6, wherein the secondary device comprises: a charge-discharge controller, a current measuring and protecting device;
the charge and discharge machine controller is connected with the first battery pack in series, and the current measuring and protecting device is connected with the first battery pack in series.
8. The wind turbine pitch system of claim 7, wherein the current measurement and protection device comprises: fuses and shunts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123455990.2U CN217159365U (en) | 2021-12-31 | 2021-12-31 | Fan variable pitch system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123455990.2U CN217159365U (en) | 2021-12-31 | 2021-12-31 | Fan variable pitch system |
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| Publication Number | Publication Date |
|---|---|
| CN217159365U true CN217159365U (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123455990.2U Active CN217159365U (en) | 2021-12-31 | 2021-12-31 | Fan variable pitch system |
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| CN (1) | CN217159365U (en) |
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2021
- 2021-12-31 CN CN202123455990.2U patent/CN217159365U/en active Active
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