Variable pitch system switching power supply device based on super capacitor and wind turbine generator

Abstract

The utility model discloses a super-capacitor-based variable pitch system switching power supply device and a wind turbine generator set, which are applied to the field of wind power generation. Wherein the first end of the driver is connected with a power grid, and the second end of the driver is connected with the first end of the super capacitor and used for controlling charging and discharging of the super capacitor; the first end of the switching power supply is connected with the second end of the super capacitor, the second end of the switching power supply is connected with the lubricating pump, and the switching power supply is used for converting power supply voltage of the super capacitor into working voltage and supplying power to the lubricating pump. Therefore, the super-capacitor is adopted to supply power to the lubricating pump, the super-capacitor is connected with the power grid through the driver, the problem of electric quantity of the super-capacitor does not need to be considered while power is supplied to the lubricating pump, and the super-capacitor can ensure that stable and high-quality electric quantity signals are output; therefore, when the power grid quality does not meet the requirement, the use safety of the switching power supply can still be ensured, and the risk of switching power supply damage caused by poor power grid quality is avoided.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, and in particular to a power supply device for a pitch system based on a supercapacitor and a wind turbine. Background Technology

[0002] With the increasing global demand for renewable energy, wind power, as a clean and sustainable energy source, has been widely adopted. Pitch control systems are a crucial component of wind turbines, used to adjust the blade angle to adapt to changes in wind speed, thereby optimizing wind energy capture efficiency and the operational stability of the wind turbine.

[0003] Pitch control systems typically consist of components such as drives, motors, sensors, low-voltage electrical components, and lubrication pumps. The lubrication pumps are connected to the power grid, using AC power to generate wind power. However, this direct grid power supply method has certain drawbacks. Poor grid quality (e.g., voltage fluctuations, harmonics) can adversely affect the switching power supply, potentially causing damage and affecting the normal operation of the pitch system's lubrication pumps. Furthermore, current technology lacks effective solutions to address grid quality issues.

[0004] Therefore, improving the reliability and stability of the switching power supply for the lubrication pump in the pitch control system and avoiding the risk of damage to the switching power supply due to poor power grid quality is an urgent problem to be solved. Utility Model Content

[0005] The purpose of this invention is to provide a supercapacitor-based switching power supply device for a pitch system and a wind turbine generator, which can improve the reliability and stability of the switching power supply for the lubrication pump in the pitch control system and avoid the risk of damage to the switching power supply due to poor power grid quality.

[0006] To solve the above-mentioned technical problems, on the one hand, this utility model provides a switching power supply device for a pitch system based on a supercapacitor, including: a supercapacitor, a driver, a switching power supply and a lubrication pump;

[0007] The first end of the driver is connected to the power grid, and the second end of the driver is connected to the first end of the supercapacitor, which is used to control the charging and discharging of the supercapacitor.

[0008] The first terminal of the switching power supply is connected to the second terminal of the supercapacitor, and the second terminal of the switching power supply is connected to the lubrication pump. This is used to convert the power supply voltage of the supercapacitor into the working voltage and to power the lubrication pump.

[0009] Preferably, it further includes: a load switch;

[0010] The first terminal of the load switch is connected to the second terminal of the driver.

[0011] The second terminal of the load switch is connected to the first terminal of the supercapacitor.

[0012] Preferably, it further includes: a first circuit breaker;

[0013] The first terminal of the first circuit breaker is connected to the second terminal of the supercapacitor.

[0014] The second terminal of the first circuit breaker is connected to the first terminal of the switching power supply.

[0015] Preferably, it further includes: a second circuit breaker;

[0016] The first terminal of the second circuit breaker is connected to the second terminal of the switching power supply.

[0017] The second terminal of the second circuit breaker is connected to the lubrication pump.

[0018] Preferably, it further includes: a contactor;

[0019] In this circuit breaker, the first end of the feedback contact is connected to the second end of the feedback contact.

[0020] The second end of the feedback contact in the contactor is connected to the lubrication pump.

[0021] Preferably, it further includes: a grounding protection device;

[0022] The first terminal of the grounding protection device is connected to the second terminal of the feedback contact in the contactor;

[0023] The second terminal of the grounding protection device is grounded.

[0024] Preferably, the supercapacitor is an integrated supercapacitor.

[0025] Preferably, it further includes: a leakage detection device and a display device;

[0026] The first end of the leakage detection device is connected to the first end of the supercapacitor and the second end of the driver.

[0027] The second terminal of the leakage detection device is connected to the first terminal of the switching power supply and the second terminal of the supercapacitor.

[0028] The third end of the leakage detection device is connected to the first end of the display device.

[0029] Preferably, it further includes: a signal acquisition device and a signal analysis device;

[0030] The first end of the signal acquisition device is connected to the power grid and the first end of the driver;

[0031] The second end of the signal acquisition device is connected to the first end of the signal analysis device;

[0032] The second end of the signal analysis device is connected to the second end of the display device.

[0033] On the other hand, this application also provides a wind turbine generator, including the aforementioned supercapacitor-based pitch system switching power supply device.

[0034] The present invention provides a supercapacitor-based switching power supply device for a pitch system, comprising: a supercapacitor, a driver, a switching power supply, and a lubrication pump. The first terminal of the driver is connected to the power grid, and the second terminal of the driver is connected to the first terminal of the supercapacitor for controlling the charging and discharging of the supercapacitor. The first terminal of the switching power supply is connected to the second terminal of the supercapacitor, and the second terminal of the switching power supply is connected to the lubrication pump for converting the supply voltage of the supercapacitor into the operating voltage and supplying power to the lubrication pump. Therefore, this application uses a supercapacitor to supply power to the lubrication pump. Since the supercapacitor is connected to the power grid via the driver, the charge level of the supercapacitor does not need to be considered when supplying power to the lubrication pump. Furthermore, since the supercapacitor can guarantee a stable and high-quality output signal regardless of the input signal quality, the switching power supply can still be safely used even when the power grid quality is unsatisfactory. This improves the reliability and stability of related components and avoids the risk of damage to the switching power supply due to poor power grid quality. Attached Figure Description

[0035] To more clearly illustrate the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of a switching power supply device for a pitch system based on a supercapacitor, provided for an embodiment of this application;

[0037] Figure 2 A complete schematic diagram of a supercapacitor-based switching power supply device for a pitch system is provided for the purposes of this application.

[0038] Figure 3 An electrical schematic diagram of a supercapacitor-based switching power supply device for a pitch system is provided in an embodiment of this application. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] The core of this invention is to provide a power supply device for a pitch system switching power supply and a wind turbine based on a supercapacitor.

[0041] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Figure 1 A schematic diagram of a switching power supply device for a pitch system based on a supercapacitor, provided as an embodiment of this application, is shown below. Figure 1 As shown, the system includes: a supercapacitor 1, a driver 2, a switching power supply 3, and a lubrication pump 4, as well as a power grid 5. The connection relationship of the switching power supply device for the supercapacitor-based pitch system is as follows: the first terminal of the driver 2 is connected to the power grid 5, and the second terminal of the driver 2 is connected to the first terminal of the supercapacitor 1; the first terminal of the switching power supply 3 is connected to the second terminal of the supercapacitor 2, and the second terminal of the switching power supply 3 is connected to the lubrication pump 4.

[0043] In a specific embodiment, a supercapacitor (ultracapacitor) is a power source with special properties, falling between a traditional capacitor and a battery. It primarily stores electrical energy through its double-layer structure and redox capacitance. However, no chemical reaction occurs during its energy storage process; this process is reversible. Therefore, the supercapacitor can be repeatedly charged and discharged hundreds of thousands of times, and it provides a stable and high-quality output. An integrated supercapacitor can be selected as the supercapacitor.

[0044] Meanwhile, since the supercapacitor 1 is connected to the power grid 5 through the driver 2, that is, the power grid 5 supplies power to the supercapacitor 1 through the driver 2, and as long as the power grid 5 is not interrupted, the supercapacitor 1 will always be charged. The driver 2 can also be understood as controlling the charging and discharging between the power grid 5 and the supercapacitor 1. Furthermore, the supercapacitor 1 is connected to the lubrication pump 4 through the switching power supply 3, and mainly supplies power to the lubrication pump 4 through the switching power supply 3 to ensure the normal operation of the lubrication pump 1 and the switching power supply 3.

[0045] In this design, due to the inherent characteristics of the supercapacitor 1, it can provide stable DC power to the switching power supply 3 and the lubrication pump 4 regardless of the quality of the electrical signal received from the power grid 5, thereby improving the reliability and stability of the relevant components and avoiding the risk of damage to the switching power supply due to poor power grid quality.

[0046] It should be noted that some switches can also be designed in the specific connection relationship to provide a safety guarantee for the power supply device of the supercapacitor-based pitch system switching power supply.

[0047] The present invention provides a supercapacitor-based switching power supply device for a pitch system, comprising: a supercapacitor, a driver, a switching power supply, and a lubrication pump. The first terminal of the driver is connected to the power grid, and the second terminal of the driver is connected to the first terminal of the supercapacitor for controlling the charging and discharging of the supercapacitor. The first terminal of the switching power supply is connected to the second terminal of the supercapacitor, and the second terminal of the switching power supply is connected to the lubrication pump for converting the supply voltage of the supercapacitor into the operating voltage and supplying power to the lubrication pump. Therefore, this application uses a supercapacitor to supply power to the lubrication pump. Since the supercapacitor is connected to the power grid via the driver, the charge level of the supercapacitor does not need to be considered when supplying power to the lubrication pump. Furthermore, since the supercapacitor can guarantee a stable and high-quality output signal regardless of the input signal quality, the switching power supply can still be safely used even when the power grid quality is unsatisfactory. This improves the reliability and stability of related components and avoids the risk of damage to the switching power supply due to poor power grid quality.

[0048] Figure 2 This application provides a complete schematic diagram of a supercapacitor-based switching power supply device for a pitch system. Figure 3 This is an electrical schematic diagram of a switching power supply device for a pitch system based on a supercapacitor, provided as an embodiment of this application. Figure 2 and Figure 3 As shown, in addition to the supercapacitor 1, driver 2, switching power supply 3, and lubrication pump 4, it also includes: power grid 5, load switch 6, first circuit breaker 7, second circuit breaker 8, contactor 9, grounding protection device 10, and wiring harnesses 11, 12, 13, 14, 15, 16, 17, 18, and 19. Figure 2The connection relationships of the components in the supercapacitor-based pitch system switching power supply device are as follows: the power grid 5 is connected to the first terminal of the driver 2; the second terminal of the driver 2 is connected to the first terminal of the load switch 6; the second terminal of the load switch 6 is connected to the first terminal of the supercapacitor 1; the second terminal of the supercapacitor 1 is connected to the first terminal of the first circuit breaker 7; the second terminal of the first circuit breaker 7 is connected to the first terminal of the switching power supply 3; the second terminal of the switching power supply 3 is connected to the first terminal of the second circuit breaker 8; the second terminal of the second circuit breaker 8 is connected to the first terminal of the feedback contact in the contactor 9; and the second terminal of the feedback contact in the contactor 9 is connected to the lubrication pump 10.

[0049] In a specific embodiment, the supercapacitor 1 is connected to the load switch 6 via wiring harnesses 11 and 12; the driver 2 is connected to the load switch 6 via wiring harnesses 13 and 14; the switching power supply 3 is connected to the load switch 6 via wiring harnesses 15 and 16; the grounding wire of the switching power supply 3 is connected via wiring harness 17; the switching power supply 3 is connected to the lubrication pump 4 via the second circuit breaker 8, the contactor 9, and wiring harnesses 18 and 19; and the lubrication pump 4 is connected to the ground via grounding device 10.

[0050] Among them, the load switch 6 isolates and protects the power supply between the driver 2, the switching power supply 3 and the supercapacitor 1; the first circuit breaker 7 controls and protects the power supply between the switching power supply 3 and the supercapacitor 1; the second circuit breaker 8 controls and protects the power supply between the switching power supply 3 and the lubrication pump 4; the supercapacitor 1 is charged and discharged by the driver 2 to maintain a certain voltage, and at the same time serves as a DC power supply to the switching power supply 3; the switching power supply 3 converts the DC power into 24V voltage to supply power to the lubrication pump 4.

[0051] In addition, since supercapacitor 1 can be a solid or liquid energy storage device, leakage may occur when it is a liquid energy storage device. Therefore, in the switching power supply device of the supercapacitor-based pitch system, a leakage detection device and a display device can be added. The first terminal of the leakage detection device is connected to the first terminal of supercapacitor 1 and the second terminal of driver 2; the second terminal of the leakage detection device is connected to the first terminal of switching power supply 3 and the second terminal of supercapacitor 1; and the third terminal of the leakage detection device is connected to the first terminal of the display device. That is, the leakage detection device is connected to both ends of supercapacitor 1, and then connected to the display device. The leakage detection device is mainly used to detect whether supercapacitor 1 is leaking, determine the wear and tear based on the operating data of supercapacitor 1, and send the current determination to the display device so that maintenance personnel can determine the condition of supercapacitor 1 based on the displayed information.

[0052] Since supercapacitor 1 can output high-quality, stable DC power regardless of whether the power grid 5 is in good or bad condition, the quality of the power grid 5 cannot be determined in the practical application of the supercapacitor-based pitch system switching power supply. Therefore, a signal acquisition device and a signal analysis device can be added to the supercapacitor-based pitch system switching power supply. The first terminal of the signal acquisition device is connected to the power grid 5 and the first terminal of the driver 2; the second terminal of the signal acquisition device is connected to the first terminal of the signal analysis device; and the second terminal of the signal analysis device is connected to the second terminal of the display device. In other words, the signal acquisition device simultaneously acquires the electrical signal sent from the power grid 5 to supercapacitor 1, determines the quality status through the signal analysis device, and then displays the result on the display device.

[0053] It should be noted that the embodiments provided in this application are only one possible implementation method, but are not limited to this implementation method. Users can set their own implementation methods according to their needs.

[0054] The present invention provides a supercapacitor-based switching power supply device for a pitch system, comprising: a supercapacitor, a driver, a switching power supply, and a lubrication pump. The first terminal of the driver is connected to the power grid, and the second terminal of the driver is connected to the first terminal of the supercapacitor for controlling the charging and discharging of the supercapacitor. The first terminal of the switching power supply is connected to the second terminal of the supercapacitor, and the second terminal of the switching power supply is connected to the lubrication pump for converting the supply voltage of the supercapacitor into the operating voltage and supplying power to the lubrication pump. Therefore, this application uses a supercapacitor to supply power to the lubrication pump. Since the supercapacitor is connected to the power grid via the driver, the charge level of the supercapacitor does not need to be considered when supplying power to the lubrication pump. Furthermore, since the supercapacitor can guarantee a stable and high-quality output signal regardless of the quality of the input signal, the switching power supply can still be safely used even when the power grid quality is unsatisfactory. This improves the reliability and stability of related components and avoids the risk of damage to the switching power supply due to poor power grid quality.

[0055] On the other hand, this application also provides a wind turbine generator, including the aforementioned supercapacitor-based pitch system switching power supply device, and has the same beneficial effects. Since the corresponding embodiment of this application is the same as the aforementioned supercapacitor-based pitch system switching power supply device embodiment, it will not be described in detail here.

[0056] The foregoing has provided a detailed description of a supercapacitor-based pitch system switching power supply device and a wind turbine generator provided by this utility model. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

[0057] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A switching power supply device for a pitch system based on a supercapacitor, characterized in that, include: Supercapacitors, drivers, switching power supplies, and lubrication pumps; The first end of the driver is connected to the power grid, and the second end of the driver is connected to the first end of the supercapacitor, for controlling the charging and discharging of the supercapacitor; The first terminal of the switching power supply is connected to the second terminal of the supercapacitor, and the second terminal of the switching power supply is connected to the lubrication pump, which is used to convert the power supply voltage of the supercapacitor into the working voltage and to supply power to the lubrication pump.

2. The power supply device for a pitch system based on a supercapacitor according to claim 1, characterized in that, Also includes: Load switch; The first terminal of the load switch is connected to the second terminal of the driver. The second terminal of the load switch is connected to the first terminal of the supercapacitor.

3. The power supply device for a pitch system based on a supercapacitor according to claim 1, characterized in that, Also includes: First circuit breaker; Wherein, the first terminal of the first circuit breaker is connected to the second terminal of the supercapacitor; The second terminal of the first circuit breaker is connected to the first terminal of the switching power supply.

4. The power supply device for a pitch system based on a supercapacitor according to claim 1, characterized in that, Also includes: Second circuit breaker; The first terminal of the second circuit breaker is connected to the second terminal of the switching power supply. The second terminal of the second circuit breaker is connected to the lubrication pump.

5. The supercapacitor-based pitch system switching power supply device according to claim 4, characterized in that, Also includes: Contactor; The first end of the feedback contact in the contactor is connected to the second end of the second circuit breaker. The second end of the feedback contact in the contactor is connected to the lubrication pump.

6. The supercapacitor-based switching power supply device for a pitch system according to claim 5, characterized in that, It also includes: grounding protection devices; The first end of the grounding protection device is connected to the second end of the feedback contact in the contactor; The second end of the grounding protection device is grounded.

7. The power supply device for a pitch system based on a supercapacitor according to claim 1, characterized in that, The supercapacitor is an integrated supercapacitor.

8. The power supply device for a supercapacitor-based pitch system switching power supply according to claim 1, characterized in that, Also includes: Leakage detection device and display device; The first end of the leakage detection device is connected to the first end of the supercapacitor and the second end of the driver. The second terminal of the leakage detection device is connected to the first terminal of the switching power supply and the second terminal of the supercapacitor. The third end of the leakage detection device is connected to the first end of the display device.

9. The power supply device for a supercapacitor-based pitch system switching power supply according to claim 8, characterized in that, Also includes: Signal acquisition devices and signal analysis devices; The first end of the signal acquisition device is connected to the power grid and the first end of the driver; The second end of the signal acquisition device is connected to the first end of the signal analysis device; The second end of the signal analysis device is connected to the second end of the display device.

10. A wind turbine generator set, characterized in that, Includes the supercapacitor-based switching power supply device for pitch systems as described in any one of claims 1-9.

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