Doubly-fed converter main body detection device and detection method

Abstract

The invention relates to the technical field of doubly-fed converter main body detection, in particular to a doubly-fed converter main body detection device and method. The device comprises a first detection fixing frame, one side of the first detection fixing frame is fixedly connected with a second detection fixing frame, the middle of the first detection fixing frame is provided with a conveying mechanism, the top of the first detection fixing frame is provided with a testing mechanism, and the top of the second detection fixing frame is fixedly connected with an aging testing mechanism. When electric leakage detection is carried out on the doubly-fed converter body, through rotation of motors on an X-axis seat, a Y-axis seat and a Z-axis seat, a lead screw is adjusted to rotate, so that a sliding rail is convenient to move and slide, the position of an adjusting frame is convenient to adjust, and the detection accuracy of the doubly-fed converter body is improved. Therefore, the leakage detector can conveniently test the doubly-fed converter, and normal use of the doubly-fed converter is prevented from being affected due to the fact that the doubly-fed converter is damaged and not electrified.

Description

Technical Field

[0001] The present invention relates to the technical field of doubly-fed converter main body detection, and in particular to a doubly-fed converter main body detection device and a detection method. Background Art

[0002] Doubly-fed converter is a converter that uses the doubly-fed principle. Its basic structure includes a motor, a rotor, a stator and a power electronic converter. In the doubly-fed converter, the rotor of the motor is connected to the grid through a doubly-fed circuit, while the stator is connected to the motor through a power electronic converter. The doubly-fed circuit consists of capacitors and inductors at the rotor end, which can control the speed and power output of the motor.

[0003] Among them, the "dynamic model bidirectional wind power energy conversion test bench and experimental method based on double-fed generator" disclosed in the announcement number "CN103886791B" is also an increasingly mature technology. Its "the test bench includes a PLC control cabinet, an asynchronous motor, a double-fed generator, a full-power converter, a feeder cabinet, a back-to-back converter, a distribution transformer and a power quality measuring instrument. The present invention fills the shortcomings of the existing test benches to meet the multi-faceted teaching needs and realizes a multifunctional test bench for wind power generation. It can realize related experiments of two power generation modes and two converter structures. Before operation, one of the power generation schemes can be selected on the PC model. The detection experiment range includes the power quality from the original wind to the generated electricity. It allows experimental personnel to have a deeper understanding of the relevant principles and related control technologies of wind power generation.

[0004] However, the above-mentioned device design has the following disadvantages: the invention cannot detect the failure rate of the doubly-fed converter, and the main body of the doubly-fed converter is prone to leakage aging, thereby affecting the normal use of the main body of the doubly-fed converter.

[0005] Therefore, it is necessary to provide a doubly-fed converter main body detection device and detection method to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a detection device and a detection method for a doubly-fed converter body, which solves the problems raised in the background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a doubly-fed converter main body detection device, comprising a first detection fixed frame, a second detection fixed frame is fixedly connected to one side of the first detection fixed frame, a conveying mechanism is arranged in the middle of the first detection fixed frame, a testing mechanism is installed on the top of the first detection fixed frame, an aging testing mechanism is fixedly connected to the top of the second detection fixed frame, and a delivery mechanism is arranged at the bottom of the second detection fixed frame.

[0008] Preferably, the conveying mechanism includes a conveying frame fixedly connected to the bottom of the first detection fixed frame, a first drive motor fixedly connected to one side of the conveying frame, a driving turntable fixedly connected to one side of the first drive motor, a plurality of driven turntables movably connected to the inner side of the conveying frame, the outer side of the driving turntable is connected to one of the driven turntables through a transmission belt, and the driven turntables are connected to each other through a transmission belt, and one side of the driving turntable and the driven turntable are fixedly connected to conveying rollers.

[0009] Preferably, the testing mechanism includes an X-axis seat fixedly connected to the top of the first detection fixed frame, one end of the top of the X-axis seat is fixedly connected to a first motor, the top of the X-axis seat is fixedly connected to a first slide rail, the top of the first slide rail is slidably connected to a first movable slide, one side of the first movable slide is threadedly connected to a first screw rod, one end of the first screw rod is transmission-connected to the first motor, the top of the first movable slide is fixedly connected to a Y-axis seat, one end of the top of the Y-axis seat is fixedly connected to a second motor, one side of the Y-axis seat is fixedly connected to a second slide rail, and one end of the second slide rail A second movable slide is connected to the side slidingly, and the second movable slide is threadedly connected to the second screw rod of the transmission end of the second motor, one side of the second movable slide is fixedly connected to the Z-axis seat, the top of the Z-axis seat is fixedly connected to the third motor, the bottom end of the third motor is fixedly connected to the third screw rod, one side of the Z-axis seat is fixedly connected to the third slide rail, one side of the third slide rail is slidably connected to the third movable slide, the third movable slide is threadedly connected to the outer side of the third screw rod, one side of the third movable slide is fixedly connected to the adjustment frame, and the bottom end of the adjustment frame is fixedly connected to the leakage detector.

[0010] Preferably, the aging test mechanism includes two first electric telescopic rods fixedly connected to the top of the second detection fixed frame, the telescopic ends of the first electric telescopic rods are fixedly connected to a fixing seat, a guide rod is inserted and connected to the middle of the fixing seat, the top of the guide rod is fixedly connected to the top of the second detection fixed frame, the bottom end of the fixing seat is fixedly connected to the second electric telescopic rod, the telescopic end of the second electric telescopic rod is fixedly connected to a fixing shell, and the interior of the fixed shell is fixedly connected to an electrical measuring pin.

[0011] Preferably, the inspection mechanism includes an inspection frame fixedly connected to the top of the second detection fixed frame, third electric telescopic rods are fixedly connected to both sides of the inspection frame, the telescopic end of the third electric telescopic rod is fixedly connected to an electric sliding seat, the top of the electric sliding seat is movably connected to a sliding roller, one end side of the inspection frame is fixedly connected to a fourth electric telescopic rod, and the telescopic end of the fourth electric telescopic rod is fixedly connected to a push seat.

[0012] Preferably, the doubly-fed converter main body detection method further includes the following steps: Step 1: When the doubly-fed converter body is subjected to system aging test, pre-charging circuit, monitoring rectification circuit operation, and the detection device determines whether the function is good or bad, the doubly-fed converter body is transported to the bottom of the testing mechanism by the provided conveying mechanism to detect whether the doubly-fed converter body has leakage; Step 2: The doubly-fed converter body after the preliminary test is transported to the bottom of the aging test mechanism by the transport mechanism, and the doubly-fed converter body is powered on and tested by the aging test mechanism to determine whether it is normal; Step three, the aged doubly-fed converter body is separated and collected by the inspection agency.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a double-fed converter main body detection device and detection method: 1. When the main body of the doubly-fed converter is powered on for the aging test, in order to test whether the pins of the doubly-fed converter can be normally powered on and avoid the doubly-fed converter from being powered on, the first electric telescopic rod is extended and retracted. The extension of the first electric telescopic rod facilitates the pushing of the fixing seat for horizontal adjustment, and the position is adjusted up and down along the guide rod. The extension of the second electric telescopic rod facilitates the pushing of the electrical test pins and the power-on hole of the doubly-fed converter to insert them, and a power-on test is performed to determine whether the power is on, thereby checking the aging condition.

[0014] 2. When conducting leakage detection on the main body of the doubly-fed converter, the motors on the X-axis seat, the Y-axis seat and the Z-axis seat are rotated to adjust the lead screw, thereby facilitating the sliding of the slide rail and adjusting the position of the adjustment frame, so that the leakage detector can test the doubly-fed converter to prevent the doubly-fed converter from being damaged and not powered on, affecting normal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is one of the structural schematic diagrams of the present invention; Figure 3 It is a schematic diagram of the structure of the testing mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the aging test mechanism of the present invention; Figure 5 It is a structural schematic diagram of the inspection mechanism of the present invention; Figure 6 It is a schematic diagram of the structure of the conveying mechanism of the present invention.

[0016] In the figure: 1, first detection fixed frame; 101, second detection fixed frame; 2, conveying mechanism; 201, conveying frame; 202, first driving motor; 203, driving turntable; 204, driven turntable; 205, transmission belt; 206, conveying roller; 3. Aging test mechanism; 301. First electric telescopic rod; 302. Fixed seat; 303. Guide rod; 304. Fixed shell; 305. Electrical test pin; 4. Inspection mechanism; 401. Inspection frame; 402. Third electric telescopic rod; 403. Electric sliding seat; 404. Sliding roller; 405. Fourth electric telescopic rod; 5. Push seat; 6. Test mechanism; 601. X-axis seat; 602. First motor; 603. First slide rail; 604. First movable slide seat; 605. Y-axis seat; 606. Second slide rail; 607. Second movable slide seat; 608. Second screw rod; 609. Z-axis seat; 6010. Third motor; 6011. Third screw rod; 6012. Third slide rail; 6013. Third movable slide seat; 6014. Adjustment frame; 6015. Leakage detector. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0019] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-Figure 6 As shown, the doubly-fed converter main body detection device proposed in the present invention includes a first detection fixed frame 1, a second detection fixed frame 101 is fixedly connected to one side of the first detection fixed frame 1, a conveying mechanism 2 is arranged in the middle of the first detection fixed frame 1, a testing mechanism 6 is installed on the top of the first detection fixed frame 1, an aging testing mechanism 3 is fixedly connected to the top of the second detection fixed frame 101, and a delivery mechanism 4 is arranged at the bottom of the second detection fixed frame 101.

[0022] The conveying mechanism 2 includes a conveying frame 201 fixedly connected to the bottom of the first detection fixed frame 1, a first drive motor 202 fixedly connected to one side of the conveying frame 201, a driving turntable 203 fixedly connected to one side of the first drive motor 202, and a plurality of driven turntables 204 movably connected to the inner side of the conveying frame 201. The outer side of the driving turntable 203 is connected to one of the driven turntables 204 through a transmission belt 205, and the driven turntables 204 are connected to each other through the transmission belt 205. A conveying roller 206 is fixedly connected to one side of the driving turntable 203 and the driven turntable 204.

[0023] During specific use, in order to check whether the main circuit of the doubly fed converter is normal and improve the efficiency of fault handling of the doubly fed converter, the pre-charging circuit and the uncontrolled rectifier circuit are operated, combined with the current sharing detection device to judge the function, and detect whether the voltage is within a reasonable range under different voltage supplies. When performing conveying detection, the rotation of the first drive motor 202 on one side of the conveying frame 201 drives the active turntable 203 to rotate, so that while the active turntable 203 is rotating, it drives one of the driven turntables through the transmission belt 205, and 204 is driven by the rotation of the driven turntable 204 and the transmission belts 205 at the same time. The transmission is mutually transmitted, which facilitates the rotation of the driven turntable 204 and the rotation of the conveying roller 206, so that the main body of the doubly fed converter is conveyed, thereby facilitating detection.

[0024] The testing mechanism 6 includes an X-axis seat 601 fixedly connected to the top of the first detection fixed frame 1, one end of the top of the X-axis seat 601 is fixedly connected to the first motor 602, the top of the X-axis seat 601 is fixedly connected to the first slide rail 603, the top of the first slide rail 603 is slidably connected to the first movable slide 604, one side of the first movable slide 604 is threadedly connected to the first screw rod, one end of the first screw rod is transmission-connected to the first motor 602, the top of the first movable slide 604 is fixedly connected to the Y-axis seat 605, one end of the top of the Y-axis seat 605 is fixedly connected to the second motor, one side of the Y-axis seat 605 is fixedly connected to the second slide rail 606, and one side of the second slide rail 606 is slidably connected to the second movable slide 60 7. The second movable slide 607 is threadedly connected with the second screw rod 608 at the transmission end of the second motor, one side of the second movable slide 607 is fixedly connected with a Z-axis seat 609, the top of the Z-axis seat 609 is fixedly connected with a third motor 6010, the bottom end of the third motor 6010 is fixedly connected with a third screw rod 6011, one side of the Z-axis seat 609 is fixedly connected with a third slide rail 6012, one side of the third slide rail 6012 is slidably connected with a third movable slide 6013, the third movable slide 6013 is threadedly connected with the outer side of the third screw rod 6011, one side of the third movable slide 6013 is fixedly connected with an adjusting frame 6014, and the bottom end of the adjusting frame 6014 is fixedly connected with a leakage detector 6015.

[0025] During specific use, when conducting leakage monitoring of the main body of the doubly fed converter, the first motor 602 on the X-axis seat 601 is rotated to drive the first screw rod to rotate, so that during the rotation of the first screw rod, the first movable slide 604 on the first slide rail 603 is convenient for adjusting and sliding along the X-axis. At the same time, the second motor is used to drive the second screw rod 608 to rotate, so that while the second screw rod 608 is rotating, it is convenient to drive the second movable slide 607 at the bottom to move along the second slide rail 606, so as to facilitate the adjustment of the Z-axis seat 609. Through the adjustment of the Z-axis seat 609, it is convenient to adjust to the top of the doubly fed converter for detection. The third motor 6010 is set to drive the third screw rod 6011 to rotate, so that the third screw rod 6011 rotates and adjusts the third movable slide 6013 on the third slide rail 6012, so that when the third movable slide 6013 is moved and adjusted, it is convenient for the leakage detector on the adjustment frame 6014 to move downward, so as to facilitate leakage detection of the leakage detector.

[0026] The aging test mechanism 3 includes two first electric telescopic rods 301 fixedly connected to the top of the second detection fixed frame 101, the telescopic ends of the first electric telescopic rods 301 are fixedly connected to the fixing seats 302, the middle of the fixing seats 302 are interlaced with guide rods 303, the top of the guide rods 303 is fixedly connected to the top of the second detection fixed frame 101, the bottom end of the fixing seats 302 is fixedly connected to the second electric telescopic rod, the telescopic end of the second electric telescopic rod is fixedly connected to the fixing shell 304, and the interior of the fixing shell 304 is fixedly connected to the electrical testing pin 305.

[0027] During specific use, when the main body of the doubly-fed converter is powered on for an aging test, in order to test whether the pins of the doubly-fed converter can be normally powered on and avoid the doubly-fed converter from being powered on but not powered on, the first electric telescopic rod 301 is extended and retracted, and the first electric telescopic rod 301 is extended and retracted to facilitate pushing the fixing seat 302 for horizontal adjustment, and the position is adjusted up and down along the guide rod 303, and the second electric telescopic rod is extended and retracted to facilitate pushing the electrical test pin 305 to be inserted into the power-on hole of the doubly-fed converter, and a power-on test is performed to determine whether the power is on, thereby checking the aging condition.

[0028] The inspection mechanism 4 includes an inspection frame 401 fixedly connected to the top of the second detection fixed frame 101, third electric telescopic rods 402 are fixedly connected to both sides of the inspection frame 401, the telescopic end of the third electric telescopic rod 402 is fixedly connected to an electric sliding seat 403, the top of the electric sliding seat 403 is movably connected to a sliding roller 404, one end side of the inspection frame 401 is fixedly connected to a fourth electric telescopic rod 405, and the telescopic end of the fourth electric telescopic rod 405 is fixedly connected to a push seat 5.

[0029] During specific use, after the aging test of the doubly-fed converter body is completed, it is necessary to sort the qualified and unqualified doubly-fed converter bodies. The extension and retraction of the third electric telescopic rods 402 on both sides of the inspection frame 401 facilitate the electric sliding seat 403 to slide and adjust, so that the electric sliding seat 403 can transport the doubly-fed converter body during the adjustment process. The cooperation of the sliding roller 404 facilitates the transportation of the doubly-fed converter to one side of the push seat 5. The push seat 5 is pushed by the extension and retraction of the fourth electric telescopic rod 405, so that the aged doubly-fed converter is pushed out and collected.

[0030] The method for detecting a main body of a doubly-fed converter further comprises the following steps: Step 1: When the doubly-fed converter body is subjected to system aging test, pre-charging circuit, monitoring rectification circuit operation, and the detection device determines whether the function is good or bad, the doubly-fed converter body is transported to the bottom of the testing mechanism 6 by the provided conveying mechanism 2 to detect whether the doubly-fed converter body has leakage; Step 2: The doubly-fed converter body after the preliminary test is transported to the bottom of the aging test mechanism 3 by the transport mechanism 2, and the doubly-fed converter body is powered on and tested by the aging test mechanism 3 to determine whether it is normal; Step three, the inspection agency 4 separates and collects the aged doubly-fed converter body.

[0031] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0032] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A doubly-fed converter main body detection device, comprising a first detection fixing frame (1), characterized in that: A second detection fixed frame (101) is fixedly connected to one side of the first detection fixed frame (1), a conveying mechanism (2) is provided in the middle of the first detection fixed frame (1), a testing mechanism (6) is installed on the top of the first detection fixed frame (1), an aging testing mechanism (3) is fixedly connected to the top of the second detection fixed frame (101), and a delivery mechanism (4) is provided at the bottom of the second detection fixed frame (101).

2. The doubly-fed converter main body detection device according to claim 1, characterized in that: The conveying mechanism (2) comprises a conveying frame (201) fixedly connected to the bottom of the first detection fixed frame (1), a first drive motor (202) fixedly connected to one side of the conveying frame (201), a driving turntable (203) fixedly connected to one side of the first drive motor (202), a plurality of driven turntables (204) movably connected to the inner side of the conveying frame (201), the outer side of the driving turntable (203) is connected to one of the driven turntables (204) through a transmission belt (205), and the driven turntables (204) are connected to each other through the transmission belt (205), and a conveying roller (206) is fixedly connected to one side of the driving turntable (203) and the driven turntable (204).

3. The doubly-fed converter main body detection device according to claim 1, characterized in that: The testing mechanism (6) comprises an X-axis seat (601) fixedly connected to the top of the first detection fixed frame (1), one end of the top of the X-axis seat (601) is fixedly connected to a first motor (602), the top of the X-axis seat (601) is fixedly connected to a first slide rail (603), the top of the first slide rail (603) is slidably connected to a first movable slide seat (604), one side of the first movable slide seat (604) is threadedly connected to a first screw rod, one end of the first screw rod is transmission-connected to the first motor (602), the top of the first movable slide seat (604) is fixedly connected to a Y-axis seat (605), one end of the top of the Y-axis seat (605) is fixedly connected to a second motor, one side of the Y-axis seat (605) is fixedly connected to a second slide rail (606), one side of the second slide rail (606) is slidably connected to a second movable slide seat (607), and the second movable slide seat (607) is threadedly connected to a second screw rod (608) at the transmission end of the second motor.

4. The doubly-fed converter main body detection device according to claim 3, characterized in that: One side of the second movable slide (607) is fixedly connected to a Z-axis seat (609), the top of the Z-axis seat (609) is fixedly connected to a third motor (6010), the bottom end of the third motor (6010) is fixedly connected to a third screw rod (6011), one side of the Z-axis seat (609) is fixedly connected to a third slide rail (6012), one side of the third slide rail (6012) is slidably connected to a third movable slide (6013), the third movable slide (6013) is threadedly connected to the outer side of the third screw rod (6011), one side of the third movable slide (6013) is fixedly connected to an adjustment frame (6014), and the bottom end of the adjustment frame (6014) is fixedly connected to a leakage detector (6015).

5. The doubly-fed converter main body detection device according to claim 1, characterized in that: The aging test mechanism (3) comprises two first electric telescopic rods (301) fixedly connected to the top of the second detection fixed frame (101), the telescopic ends of the first electric telescopic rods (301) are fixedly connected to a fixing seat (302), the middle of the fixing seat (302) is interlaced with a guide rod (303), and the top of the guide rod (303) is fixedly connected to the top of the second detection fixed frame (101).

6. The doubly-fed converter main body detection device according to claim 5, characterized in that: The bottom end of the fixing seat (302) is fixedly connected to a second electric telescopic rod, the telescopic end of the second electric telescopic rod is fixedly connected to a fixing shell (304), and the interior of the fixing shell (304) is fixedly connected to an electrical measuring pin (305).

7. The doubly-fed converter main body detection device according to claim 1, characterized in that: The inspection delivery mechanism (4) comprises an inspection delivery frame (401) fixedly connected to the top of the second inspection fixed frame (101), third electric telescopic rods (402) are fixedly connected to both sides of the inspection delivery frame (401), the telescopic end of the third electric telescopic rod (402) is fixedly connected to an electric sliding seat (403), the top of the electric sliding seat (403) is movably connected to a sliding roller (404), one end side of the inspection delivery frame (401) is fixedly connected to a fourth electric telescopic rod (405), and the telescopic end of the fourth electric telescopic rod (405) is fixedly connected to a push seat (5).

8. A method for detecting a main body of a doubly-fed converter, characterized in that: The doubly-fed converter main body detection device according to any one of claims 1 to 7 comprises: Step 1: When the doubly-fed converter body is subjected to a system aging test, a pre-charging circuit, a monitoring rectifier circuit operation, and a detection device to judge whether the function is good or bad, the doubly-fed converter body is transported to the bottom of the testing mechanism (6) through the provided transport mechanism (2) to detect whether the doubly-fed converter body has leakage; Step 2: transporting the doubly-fed converter body after the preliminary test to the bottom of the aging test mechanism (3) through the transport mechanism (2), and conducting a power-on test on the doubly-fed converter body through the aging test mechanism (3) to determine whether it is normal; Step three: the aged doubly-fed converter body is separated and collected by the inspection mechanism (4).

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