Multifunctional tester for electric power new energy electrical equipment

Abstract

The invention discloses a multifunctional tester for electric power new energy electrical equipment, and relates to the technical field of new energy electrical multifunctional tests. The multifunctional tester for the electric power new energy electrical equipment comprises a tester main body, a protective shell and a protective cover, the upper surface of the tester main body is fixedly connected with a direct-current voltage measurement digital display meter, a direct-current measurement digital display meter, an alternating-current voltage measurement digital display meter, an alternating-current measurement digital display meter, a power supply display lamp, a working position display lamp, a zero position display lamp and an alternating-current and direct-current conversion switch, and the interior of the tester main body is fixedly connected with an isolation voltage regulator. The top of the isolation voltage regulator is provided with an adjusting knob, the upper surface of the tester main body is provided with a power jack and a wiring hole, and the inner surface of the protection housing is fixedly connected with a first elastic plate and a second elastic plate, thereby solving the blank field of no test instrument for the AC impedance of the wind driven generator rotor, and enabling the test work difficulty of a new energy station to be simplified.

Description

Technical Field

[0001] This invention relates to the field of multifunctional testing technology for new energy electrical equipment, specifically a multifunctional tester for new energy electrical equipment. Background Technology

[0002] The Northwest Branch currently has 18 self-tested new energy power stations, but lacks relevant testing equipment for AC impedance testing of doubly-fed wind turbine rotors. Therefore, the Northwest Branch is developing a multi-functional testing instrument for new energy electrical equipment, utilizing the principles and characteristics of AC impedance testing. This instrument can simultaneously measure the grounding resistance of the power grid, the grounding resistance of the wind turbine tower, and the volt-ampere characteristics of voltage transformers. It can also be used as a 0-250V adjustable AC power supply, a continuously adjustable 0-250V DC power supply, and can perform cable grounding fault and cable open circuit fault testing, as well as detect grounding faults in the stator windings of generators and motors. If an inter-turn short circuit occurs in the rotor winding of a wind turbine, the effective number of turns will decrease, its AC impedance will decrease, and losses will increase. Currently, there is no testing instrument for wind turbines; therefore, it is necessary to develop a multi-functional testing instrument for new energy electrical equipment to solve the problem of testing the AC impedance value of wind turbine rotor windings. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a multifunctional testing apparatus for electric power and new energy electrical equipment, thereby resolving the existing problems mentioned in the background section.

[0004] To solve the above problems, the present invention is implemented through the following technical solution: a multi-functional tester for electrical equipment in new energy power systems, comprising a tester body, a protective shell, and a protective cover. The upper surface of the tester body is fixedly connected to a DC voltage measurement digital display meter, a DC current measurement digital display meter, an AC voltage measurement digital display meter, an AC current measurement digital display meter, a power indicator light, a working position indicator light, a zero position indicator light, and an AC / DC conversion switch. An isolation voltage regulator is fixedly connected inside the tester body, and an adjustment knob is provided on the top of the isolation voltage regulator. The upper surface of the tester body is provided with a power socket and a wiring hole. The outer surface of the tester body is fixedly connected to... A rubber pad is provided. A first spring plate and a second spring plate are fixedly connected to the inner surface of the protective shell. A first fixing hole and a second fixing hole are provided on the outer surface of the protective shell. A ventilation pipe is fixedly connected to the inside of the protective shell. A cooling fan is fixedly connected to the inside of the ventilation pipe. A connecting strap is fixedly connected to the outer surface of the protective shell. A rubber plug is fixedly connected to the end of the connecting strap. A support rod and a handle are fixedly connected to the outer surface of the protective cover. A connecting plate is fixedly connected to the side of the outer surface of the protective cover. A threaded rod is threadedly connected to the inside of the connecting plate. A rotating handle is fixedly connected to the end of the threaded rod. A sponge pad is fixedly connected to the inner surface of the protective cover.

[0005] Preferably, the main body of the tester is disposed in the inner cavity of the protective shell, and the inner surface of the protective cover is pressed and fitted with the outer surface of the protective shell.

[0006] Preferably, the middle of the outer surface of the first elastic plate is fixedly connected to the outer surface of the tester body, and the side of the outer surface of the first elastic plate is fixedly connected to the inner surface of the protective shell.

[0007] Preferably, the middle of the outer surface of the second spring plate is fixedly connected to the inner surface of the protective shell, and the side of the outer surface of the second spring plate is fixedly connected to the inner surface of the first spring plate.

[0008] Preferably, there are several first and second spring plates, which are arranged around the perimeter and bottom of the main body of the tester.

[0009] Preferably, the rubber pad is disposed above the first elastic plate and the second elastic plate, the outer surface of the rubber pad is fixedly connected to the inner surface of the protective shell, and the top of the tester body, the protective shell and the rubber pad are flush.

[0010] Preferably, the outer surface of the ventilation duct penetrates the protective shell, the interior of the ventilation duct is connected to the interior of the protective shell, and the outer surface of the rubber plug is squeezed and adapted to the inner surface of the ventilation duct.

[0011] Preferably, the first fixing hole is located directly above the second fixing hole, and the first fixing hole and the second fixing hole are symmetrically arranged on both sides of the protective shell, and the support rod is symmetrically arranged at both ends of the handle.

[0012] Preferably, the outer surface of the threaded rod is threadedly connected to the inner surfaces of the first fixing hole and the second fixing hole, the outer surface of the threaded rod penetrates the connecting plate, and the rotating handle is located on the side of the connecting plate away from the first fixing hole and located at the second fixing hole.

[0013] This invention provides a multifunctional testing apparatus for electrical equipment in the power and new energy sectors. It has the following beneficial effects:

[0014] I. This multi-functional tester for new energy electrical equipment, through its AC / DC conversion switch, digital display of DC voltage measurement, digital display of DC current measurement, digital display of AC voltage measurement, digital display of AC current measurement, isolation voltage regulator, power indicator light, working position indicator light, zero position indicator light, and AC output circuit, DC output circuit, and shunt installed inside the tester body, enables the tester to perform multiple testing functions. It can complete the testing of AC impedance of wind turbine rotor, grounding resistance of the earth grid, grounding resistance of wind turbine tower, and volt-ampere characteristic of voltage transformer. It can be used as a 0-250V adjustable power frequency AC power supply, or as a continuously adjustable 0-250V DC power supply. It can perform cable grounding fault and open circuit fault testing, and can perform generator and motor stator winding grounding fault detection. Moreover, the multi-functional tester for new energy electrical equipment is small in size and easy to carry, filling the gap in the lack of testing instruments for AC impedance of wind turbine rotor. At the same time, it simplifies the testing work of new energy stations, reduces the number of testing instruments carried for each test, shortens the test operation time, and reduces the workload of testing personnel.

[0015] II. This multi-functional testing device for new energy electrical equipment, through the cooperation of the protective cover, support rod, handle, threaded rod, first fixing hole and second fixing hole, can install the protective cover at the bottom of the protective shell to support the entire device and prevent the device from getting damp when there is water on the ground. Alternatively, the protective cover can be installed on the top of the protective shell and the main body of the testing device, and together with the sponge pad, it can provide protection for the top of the main body of the testing device. At the same time, the handle can facilitate the carrying of the testing device.

[0016] Third, this multi-functional testing device for new energy electrical equipment, through the cooperation between the protective shell, the first elastic plate, the second elastic plate, the ventilation pipe, the cooling fan and the rubber plug, utilizes the elasticity of the first and second elastic plates to weaken the impact force, thereby reducing the force transmitted to the main body of the testing device. It can provide protection for the sides and bottom of the main body of the testing device. The cooling fan can increase the airflow around the main body of the testing device, so that the heat generated by the main body of the testing device during operation can be carried away, giving the main body of the testing device a good heat dissipation effect, which is conducive to the long-term use of the testing device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention when it is carried as a whole;

[0019] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0020] Figure 4This is a schematic diagram of the internal structure of the protective shell of the present invention;

[0021] Figure 5 This is a circuit diagram of the multifunctional tester for electric new energy electrical equipment of the present invention.

[0022] In the diagram: 1. Main body of the test apparatus; 2. Protective housing; 3. Protective cover; 4. Digital display of DC voltage measurement; 5. Digital display of DC current measurement; 6. Digital display of AC voltage measurement; 7. Digital display of AC current measurement; 8. Power socket; 9. Wiring hole; 10. Isolation voltage regulator; 11. Adjustment knob; 12. Power indicator light; 13. Working position indicator light; 14. Zero position indicator light; 15. First spring plate; 16. Second spring plate; 17. Rubber pad; 18. Ventilation duct; 19. Cooling fan; 20. Connecting strap; 21. Rubber plug; 22. Support rod; 23. Handle; 24. Connecting plate; 25. Threaded rod; 26. Rotary handle; 27. First fixing hole; 28. Second fixing hole; 29. ​​Sponge pad; 30. AC / DC conversion switch. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0024] Example 1

[0025] like Figures 1-5As shown, the present invention provides a technical solution: a multi-functional tester for electrical equipment in new energy power systems, comprising a tester body 1, a protective shell 2, and a protective cover 3. A DC voltage measurement digital display 4, a DC current measurement digital display 5, an AC voltage measurement digital display 6, an AC current measurement digital display 7, a power indicator light 12, a working position indicator light 13, a zero position indicator light 14, and an AC / DC conversion switch 30 are fixedly connected to the upper surface of the tester body 1. An isolation voltage regulator 10 is fixedly connected inside the tester body 1, and an adjustment knob 11 is provided on the top of the isolation voltage regulator 10. A power socket 8 and a wiring hole 9 are provided on the upper surface of the tester body 1. A rubber pad 17 is fixedly connected to the outer surface of the tester body 1 for protection. The inner surface of the housing 2 is fixedly connected with a first spring plate 15 and a second spring plate 16. The outer surface of the protective housing 2 is provided with a first fixing hole 27 and a second fixing hole 28. The inside of the protective housing 2 is fixedly connected with a ventilation pipe 18. The inside of the ventilation pipe 18 is fixedly connected with a cooling fan 19. The outer surface of the protective housing 2 is fixedly connected with a connecting strap 20. The end of the connecting strap 20 is fixedly connected with a rubber plug 21. The outer surface of the protective cover 3 is fixedly connected with a support rod 22 and a handle 23. The side of the outer surface of the protective cover 3 is fixedly connected with a connecting plate 24. The inside of the connecting plate 24 is threaded with a threaded rod 25. The end of the threaded rod 25 is fixedly connected with a handle 26. The inner surface of the protective cover 3 is fixedly connected with a sponge pad 29.

[0026] The main body 1 of the tester is set in the inner cavity of the protective shell 2, and the inner surface of the protective cover 3 is pressed and fitted with the outer surface of the protective shell 2.

[0027] The middle of the outer surface of the first spring plate 15 is fixedly connected to the outer surface of the tester body 1, and the side of the outer surface of the first spring plate 15 is fixedly connected to the inner surface of the protective shell 2.

[0028] The second spring plate 16 is fixedly connected to the inner surface of the protective shell 2 at the middle of its outer surface, and the side of the second spring plate 16 is fixedly connected to the inner surface of the first spring plate 15.

[0029] There are several first spring plates 15 and second spring plates 16, which are arranged around the perimeter and bottom of the main body 1 of the test apparatus.

[0030] The rubber pad 17 is positioned above the first spring plate 15 and the second spring plate 16. The outer surface of the rubber pad 17 is fixedly connected to the inner surface of the protective shell 2. The top of the tester body 1, the protective shell 2, and the rubber pad 17 are flush.

[0031] The outer surface of the ventilation pipe 18 penetrates the protective shell 2, and the interior of the ventilation pipe 18 is connected to the interior of the protective shell 2. The outer surface of the rubber plug 21 is squeezed and fitted to the inner surface of the ventilation pipe 18.

[0032] The first fixing hole 27 is located directly above the second fixing hole 28. The first fixing hole 27 and the second fixing hole 28 are symmetrically arranged on both sides of the protective shell 2. The support rod 22 is symmetrically arranged at both ends of the handle 23.

[0033] The outer surface of the threaded rod 25 is threadedly connected to the inner surface of the first fixing hole 27 and the second fixing hole 28. The outer surface of the threaded rod 25 penetrates the connecting plate 24. The handle 26 is located on the side of the connecting plate 24 away from the first fixing hole 27 and located on the side of the second fixing hole 28.

[0034] In use, the multi-functional tester for new energy electrical equipment mainly consists of an AC output circuit, a DC output circuit, an AC-DC conversion switch 30, a DC voltage measurement digital display meter 4, a shunt, a DC current measurement digital display meter 5, an AC voltage measurement digital display meter 6, an AC current measurement digital display meter 7, an isolation voltage regulator 10, a 220V power input, a power indicator light 12, a working position indicator light 13, and a zero position indicator light 14. The AC output circuit, DC output circuit, and shunt are located inside the main body 1 of the tester. For convenient on-site access, the power supply of this multi-functional tester for new energy electrical equipment is designed as a 220V AC power supply. The test voltage range is adjusted by the isolation voltage regulator 10, and the DC and AC circuits are switched by the AC-DC conversion switch 30, resulting in a DC / AC output. With a voltage range of 0-250V, the AC power supply is rectified into DC through a bridge rectifier circuit. The test is initiated by a start button and connected to the contactor to conduct the test. An overcurrent relay is also provided to trip the power contactor when the test current exceeds 15A, protecting the test personnel and test instruments. By collecting test voltage and test current, the tester can measure the AC impedance of the wind turbine rotor, test the grounding resistance of the earth grid, test the grounding resistance of the wind turbine tower, and test the volt-ampere characteristics of the voltage transformer. This allows the tester to be used as a 0-250V adjustable power frequency AC power supply, a continuously adjustable 0-250V DC power supply, and to perform cable grounding fault and cable open circuit fault tests, as well as to detect grounding faults in the stator windings of generators and motors.

[0035] When using the tester, the protective cover 3 is placed at the bottom of the protective housing 2, and the threaded rod 25 is aligned with the second fixing hole 28. The handle 26 is rotated to rotate the threaded rod 25 into the second fixing hole 28, thus fixing the protective cover 3 to the bottom of the protective housing 2. At this time, the support rod 22 acts as a support leg to support the entire device, preventing moisture damage if there is water on the ground. When the tester is not in use, the protective cover 3 is removed from the bottom of the protective housing 2 and placed on top of the protective housing 2 and the tester body 1, aligning the threaded rod 25 with the first fixing hole 27. The handle 26 is rotated to rotate the threaded rod 25 into the first fixing hole 27, thus fixing the protective cover 3 to the top of the protective housing 2. This, along with the sponge pad 29, provides protection for the top of the tester body 1. The handle 23 facilitates carrying. By setting a first elastic plate 15 and a second elastic plate 16 at the interval between the protective shell 2 and the tester body 1, the elasticity of the first elastic plate 15 and the second elastic plate 16 can weaken the impact force when the entire device is bumped or squeezed, thereby reducing the force transmitted to the tester body 1 and providing protection for the sides and bottom of the tester body 1. By setting a cooling fan 19, when the tester is in use, the rubber plug 21 is removed from the ventilation pipe 18, and the cooling fan 19 is turned on to increase the airflow around the tester body 1, so that the heat generated by the tester body 1 during operation is carried away. When the tester is not in use, the rubber plug 21 is plugged in the ventilation pipe 18 to prevent dust in the outside air from entering through the ventilation pipe 18.

[0036] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A multi-functional testing apparatus for electrical equipment in new energy power systems, comprising a main body (1), a protective shell (2), and a protective cover (3), characterized in that: The upper surface of the tester body (1) is fixedly connected to a DC voltage measurement digital display meter (4), a DC current measurement digital display meter (5), an AC voltage measurement digital display meter (6), an AC current measurement digital display meter (7), a power indicator light (12), a working position indicator light (13), a zero position indicator light (14), and an AC-DC conversion switch (30). An isolation voltage regulator (10) is fixedly connected inside the tester body (1). An adjustment knob (11) is provided on the top of the isolation voltage regulator (10). The upper surface of the tester body (1) is provided with a power socket (8) and a wiring hole (9). A rubber pad (17) is fixedly connected to the outer surface of the tester body (1). A first spring plate (15) and a second spring plate (16) are fixedly connected to the inner surface of the protective shell (2). The outer surface of the housing (2) is provided with a first fixing hole (27) and a second fixing hole (28). A ventilation pipe (18) is fixedly connected inside the protective housing (2). A cooling fan (19) is fixedly connected inside the ventilation pipe (18). A connecting strap (20) is fixedly connected to the outer surface of the protective housing (2). A rubber plug (21) is fixedly connected to the end of the connecting strap (20). A support rod (22) and a handle (23) are fixedly connected to the outer surface of the protective cover (3). A connecting plate (24) is fixedly connected to the side of the outer surface of the protective cover (3). A threaded rod (25) is threaded inside the connecting plate (24). A rotating handle (26) is fixedly connected to the end of the threaded rod (25). A sponge pad (29) is fixedly connected to the inner surface of the protective cover (3).

2. The multi-functional testing apparatus for electric power and new energy electrical equipment according to claim 1, characterized in that: The main body (1) of the tester is set in the inner cavity of the protective shell (2), and the inner surface of the protective cover (3) is squeezed and adapted to the outer surface of the protective shell (2).

3. The multifunctional testing apparatus for electric power and new energy electrical equipment according to claim 1, characterized in that: The middle of the outer surface of the first spring plate (15) is fixedly connected to the outer surface of the tester body (1), and the side of the outer surface of the first spring plate (15) is fixedly connected to the inner surface of the protective shell (2).

4. The multi-functional testing apparatus for electric power and new energy electrical equipment according to claim 1, characterized in that: The middle of the outer surface of the second spring plate (16) is fixedly connected to the inner surface of the protective shell (2), and the side of the outer surface of the second spring plate (16) is fixedly connected to the inner surface of the first spring plate (15).

5. The multifunctional testing apparatus for electric power and new energy electrical equipment according to claim 1, characterized in that: The number of the first spring plate (15) and the second spring plate (16) is several, and the first spring plate (15) and the second spring plate (16) are arranged around the body (1) and the bottom of the tester.

6. The multi-functional testing apparatus for electric power and new energy electrical equipment according to claim 1, characterized in that: The rubber pad (17) is positioned above the first spring plate (15) and the second spring plate (16). The outer surface of the rubber pad (17) is fixedly connected to the inner surface of the protective shell (2). The tops of the tester body (1), the protective shell (2), and the rubber pad (17) are flush.

7. The multi-functional testing apparatus for electric power and new energy electrical equipment according to claim 1, characterized in that: The outer surface of the ventilation pipe (18) penetrates the protective shell (2), the interior of the ventilation pipe (18) is connected to the interior of the protective shell (2), and the outer surface of the rubber plug (21) is squeezed and adapted to the inner surface of the ventilation pipe (18).

8. The multifunctional testing apparatus for electric power and new energy electrical equipment according to claim 1, characterized in that: The first fixing hole (27) is located directly above the second fixing hole (28). The first fixing hole (27) and the second fixing hole (28) are symmetrically arranged on both sides of the protective shell (2). The support rod (22) is symmetrically arranged at both ends of the handle (23).

9. The multifunctional testing apparatus for electric power and new energy electrical equipment according to claim 1, characterized in that: The outer surface of the threaded rod (25) is threadedly connected to the inner surface of the first fixing hole (27) and the second fixing hole (28). The outer surface of the threaded rod (25) penetrates the connecting plate (24). The rotating handle (26) is located on the side of the connecting plate (24) away from the first fixing hole (27) and located on the side of the second fixing hole (28).

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