CN217484426U - Wind turbine generator system power grid adaptability test equipment compatible with multiple voltage levels - Google Patents
Wind turbine generator system power grid adaptability test equipment compatible with multiple voltage levels Download PDFInfo
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- CN217484426U CN217484426U CN202220590157.4U CN202220590157U CN217484426U CN 217484426 U CN217484426 U CN 217484426U CN 202220590157 U CN202220590157 U CN 202220590157U CN 217484426 U CN217484426 U CN 217484426U
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Abstract
The utility model discloses a wind turbine generator system electric network adaptability testing device compatible with multiple voltage grades, which comprises a first, a second and a fourth, the first input transformer is connected with the first switching circuit breaker, the second switching circuit breaker is connected between the first input transformer and the second input transformer, the second input transformer is connected with the power grid disturbance analog converter through the seventh switching circuit breaker, the power grid disturbance analog converter is connected with the first output transformer through the eighth switching circuit breaker, and the filter capacitor cabinet is connected with the second output transformer through the fourth switching circuit breaker. The utility model discloses a set of equipment can realize carrying out the electric wire netting adaptability test to the wind turbine generator who incorporates the multivoltage grade.
Description
Technical Field
The utility model belongs to the technical field of the technique of large-scale wind turbine generator system electric wire netting adaptability test and specifically relates to indicate the wind turbine generator system electric wire netting adaptability test equipment of a compatible multivoltage grade.
Background
With the rapid development of wind power generation technology in China in recent years, offshore wind power in China is gradually transferred from a near-sea area to a middle-and-far-sea area, the power transmission distance is greatly increased, the line loss is increased, 66kV voltage level is generated at the same time for reducing the power transmission loss, and onshore distributed wind power also changes the voltage level of a grid-connected point from 35kV to 10 kV.
The national power grid puts higher requirements on the power grid adaptability of the wind turbine generator, a machine type which cannot provide a power grid adaptability test capability certificate cannot be connected to the grid, and therefore power grid adaptability test equipment is generated and generally connected between the power grid and the high-voltage side of a fan booster transformer in series, and disturbance is generated to simulate and verify the power grid adaptability of the wind turbine generator.
Most of the existing power grid adaptability test equipment is 35kV, a system with 66kV and 10kV voltage levels cannot be accessed, and power grid adaptability equipment needs to be designed independently for the system with the 66kV and 10kV voltage levels to meet test requirements.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a wind turbine generator system electric wire netting adaptability test equipment of compatible multivoltage grade, adopt one set of equipment can carry out the electric wire netting adaptability test to the wind turbine generator system that merges into 66kV 35kV 10kV voltage grade.
In order to achieve the above object, the present invention provides a technical solution: a wind turbine generator grid adaptability test device compatible with multiple voltage levels comprises a first switching circuit breaker, a second switching circuit breaker, a third switching circuit breaker, a fourth switching circuit breaker, a fifth switching circuit breaker, a sixth switching circuit breaker, a seventh switching circuit breaker, an eighth switching circuit breaker, a bypass circuit breaker, a first input transformer, a second input transformer, a grid disturbance analog converter, a controller, a first output transformer, a second output transformer and a filter capacitor cabinet, wherein one end of the first switching circuit breaker, one end of the second switching circuit breaker and one end of the third switching circuit breaker are respectively connected with a grid, the other end of the first switching circuit breaker is connected with one end of the first input transformer, the other end of the first input transformer is connected with one end of the second input transformer, and the other end of the second switching circuit breaker is connected between the first input transformer and the second input transformer, the other end of the second input transformer is connected with one end of a power grid disturbance analog converter through a seventh switching circuit breaker, the power grid disturbance analog converter is in communication connection with a controller, the other end of the first output transformer is connected with one end of a second output transformer through an eighth switching breaker, the other end of the second output transformer is connected with the filter capacitor cabinet through a fourth switching breaker, one end of the fifth switching breaker is connected between the first output transformer and the second output transformer, the other end of the third switching circuit breaker is connected with one end of a sixth switching circuit breaker through a bypass circuit breaker, the other end of the sixth switching circuit breaker is connected with a filter capacitor cabinet, and the filter capacitor cabinet is connected with a tested fan.
Further, the first input transformer and the second input transformer are dry-type transformers with transformation ratios of 66kV/35kV and 35kV/10kV respectively.
Further, the first output transformer and the second output transformer are dry-type transformers with transformation ratios of 10kV/35kV and 35kV/66kV respectively.
The system further comprises an auxiliary control system, wherein the auxiliary control system comprises a distribution transformer, a cooling fan, an illuminating lamp and a dehumidifier, one end of the distribution transformer is connected between the seventh switching circuit breaker and the power grid disturbance analog converter and used for converting a 10kV voltage level into a power frequency 400V voltage level, and the cooling fan, the illuminating lamp and the dehumidifier are respectively connected to the other end of the distribution transformer.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
the utility model discloses a set of comprehensive equipment can realize carrying out the electric wire netting adaptability test to the wind turbine generator who merges 66kV/35kV/10kV voltage class, verifies the adaptation ability that is incorporated into the power networks of wind turbine generator, does not need the equipment of independent production specific voltage class, reduces equipment and cost of transportation by a wide margin; simultaneously the utility model discloses a bypass circuit breaker's design can cut into bypass mode with bypass circuit breaker combined floodgate messenger equipment at fan normal operating in-process, can reduce electric wire netting disturbance analogue converter's input time greatly, lifting means operation safety and life.
Drawings
Fig. 1 is the utility model discloses a schematic diagram of electric wire netting adaptability test equipment.
Fig. 2 is the utility model discloses a power grid adaptability test equipment inserts electric wire netting schematic diagram one.
Fig. 3 is the utility model discloses a power grid adaptability test equipment inserts power grid schematic diagram two.
Detailed Description
The present invention will be further described with reference to the following specific embodiments, but the usage of the present invention is not limited thereto.
As shown in fig. 1, the wind turbine generator grid adaptability testing device compatible with multiple voltage classes according to this embodiment includes a first switching breaker 1, a second switching breaker 2, a third switching breaker 3, a fourth switching breaker 4, a fifth switching breaker 5, a sixth switching breaker 6, a seventh switching breaker 7, an eighth switching breaker 8, a bypass breaker 9, a first input transformer 10, a second input transformer 11, a grid disturbance analog converter 12, a controller 13, a first output transformer 14, a second output transformer 15, and a filter capacitor box 16.
One end of the first switching circuit breaker 1, one end of the second switching circuit breaker 2 and one end of the third switching circuit breaker 3 are respectively connected with a power grid, the other end of the first switching circuit breaker 1 is connected with one end of a first input transformer 10, the other end of the first input transformer 10 is connected with one end of a second input transformer 11, the first input transformer 10 and the second input transformer 11 are respectively dry-type transformers with transformation ratios of 66kV/35kV and 35kV/10kV, the other end of the second switching circuit breaker 2 is connected between the first input transformer 10 and the second input transformer 11, the other end of the second input transformer 11 is connected with one end of a power grid disturbance analog converter 12 through a seventh switching circuit breaker 7, the power grid disturbance analog converter 12 is in communication connection with a controller 13, and the other end thereof is connected with one end of a first output transformer 14 through an eighth switching circuit breaker 8, the other end of the first output transformer 14 is connected with one end of a second output transformer 15, the first output transformer 14 and the second output transformer 15 are dry-type transformers with transformation ratios of 10kV/35kV and 35kV/66kV respectively, the other end of the second output transformer 15 is connected with a filter capacitor cabinet 16 through a fourth switching circuit breaker 4, one end of a fifth switching circuit breaker 5 is connected between the first output transformer 14 and the second output transformer 15, the other end of the fifth switching circuit breaker is connected with the filter capacitor cabinet 16, the other end of the third switching circuit breaker 3 is connected with one end of a sixth switching circuit breaker 6 through a bypass circuit breaker 9, the bypass circuit breaker 9 is used for bypassing the power grid disturbance analog converter 12 during normal operation, the safety and the service life of the equipment are improved, and the other end of the sixth switching circuit breaker 6 is connected with the filter capacitor cabinet 16, the filter capacitor cabinet 16 is connected with a tested fan; an instruction is sent to the controller 13 through the upper computer control interface to enable the power grid disturbance analog converter 12 to generate analog disturbance, and the grid-connected adaptability of the wind turbine generator is verified; the voltage grade and the switching-in/switching-off equipment of the equipment are switched through the eight switching breakers, and the switching-out equipment is actively disconnected when the power grid fails, so that the equipment is protected; the high-frequency component of the output voltage of the power grid disturbance analog converter 12 is filtered through the filter capacitor cabinet 16, and the voltage quality is improved.
Specifically, the auxiliary control system can be configured to provide auxiliary conditions for equipment operation and maintenance, and specifically comprises a distribution transformer 17, a power supply 18, a cooling fan 19, an illuminating lamp 20 and a dehumidifier 21, wherein one end of the distribution transformer 17 is connected between the seventh switching circuit breaker 7 and the power grid disturbance analog converter 12 and used for converting a 10kV voltage level into a power frequency 400V voltage level so as to provide power supply, the power supply 18, the cooling fan 19, the illuminating lamp 20 and the dehumidifier 21 are respectively connected to the other end of the distribution transformer 17, the cooling fan 19 is mainly used for cooling the power grid disturbance analog converter to prevent the equipment from being damaged due to overhigh module temperature, the illuminating lamp 20 can provide illumination when a tester overhauls or inspects the equipment, and the dehumidifier 21 can heat and dehumidify the equipment to provide a relatively dry environment for equipment operation.
The specific application method of this example is as follows:
after the equipment is connected into a power grid, the equipment voltage grade is selected according to the power grid voltage grade:
1) testing the adaptability of a power grid with a 66kV voltage level: selectively closing the first switching breaker 1, the fourth switching breaker 4, the seventh switching breaker 7 and the eighth switching breaker 8; at this time the second, third, fifth and sixth switching breakers 2, 3, 5 and 6 are opened.
2) And (3) testing the adaptability of the power grid with the voltage grade of 35 kV: selectively closing the second switching breaker 2, the fifth switching breaker 5, the seventh switching breaker 7 and the eighth switching breaker 8; at this time the first, third, fourth and sixth switching breakers 1, 3, 4 and 6 are opened.
3) Testing the adaptability of a 10kV voltage class power grid: selectively closing the third switching breaker 3 and the sixth switching breaker 6; at this time, the first switching breaker 1, the second switching breaker 2, the fourth switching breaker 4, the fifth switching breaker 5, the seventh switching breaker 7 and the eighth switching breaker 8 are opened.
Wherein mutual interlocking between first switching circuit breaker 1, second switching circuit breaker 2 and the third switching circuit breaker 3, mutual interlocking between fourth switching circuit breaker 4, fifth switching circuit breaker 5 and the sixth switching circuit breaker 6 prevents that the maloperation from resulting in equipment voltage level to change and causing equipment trouble.
The specific testing steps of this example are as follows:
1) preparation before access: the method comprises the steps of applying for a line power failure work ticket, preparing equipment for voltage resistance, and performing line and fan power failure.
2) Respectively connecting an incoming cable 24 and an outgoing cable 25 of the power grid adaptability test equipment between the power grid and the high-voltage side of a booster transformer of the wind generating set; the connection method can be divided into, but not limited to, the following methods:
2.1) removing the cable 23 at the lower end of the falling fuse of the line tower 22, connecting the incoming cable 24 to the lower port of the falling fuse, and butting the outgoing cable 25 with the original cable at the lower port, wherein the schematic diagram is shown in the attached figure 2.
2.2) removing a lower end cable 23 of a falling fuse of a line tower 22 and a high-voltage side cable 26 of a wind generating set step-up transformer, connecting an incoming cable 24 to a lower port of the falling fuse, and connecting an outgoing cable 25 to a high-voltage side incoming busbar of the step-up transformer, wherein the schematic diagram is shown in the attached figure 3.
3) And (4) transmitting power to a line, and then selecting different switching breakers to switch on according to the voltage grade of the power grid, so that the equipment can operate for a period of time in a live manner.
4) The method comprises the steps that a power grid disturbance analog converter is operated by an upper computer to carry out pre-charging and closing and electrifying, and the grid-connected adaptability of a wind turbine generator is verified; when the power grid adaptability test is not carried out, the bypass breaker is switched on, the power grid disturbance analog converter is switched out of the main loop, the input time of the power grid disturbance analog converter is reduced, and the operation safety and the service life of equipment are improved.
The utility model discloses an one set of comprehensive equipment can realize carrying out the electric wire netting adaptability test to the wind turbine generator who merges 66kV 35kV 10kV voltage class, verifies the adaptability of being incorporated into the power networks of wind turbine generator, does not need the equipment of isolated production specific voltage class, reduces equipment and cost of transportation by a wide margin, is fit for using widely.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a wind turbine generator system electric wire netting adaptability test equipment of compatible multivoltage level which characterized in that: the switching circuit breaker comprises a first switching circuit breaker, a second switching circuit breaker, a third switching circuit breaker, a fourth switching circuit breaker, a fifth switching circuit breaker, a sixth switching circuit breaker, a seventh switching circuit breaker, an eighth switching circuit breaker, a bypass circuit breaker, a first input transformer, a second input transformer, a power grid disturbance analog converter, a controller, a first output transformer, a second output transformer and a filter capacitor cabinet, wherein one end of the first switching circuit breaker, one end of the second switching circuit breaker and one end of the third switching circuit breaker are respectively connected with a power grid, the other end of the first switching circuit breaker is connected with one end of the first input transformer, the other end of the first input transformer is connected with one end of the second input transformer, the other end of the second switching circuit breaker is connected between the first input transformer and the second input transformer, and the other end of the second input transformer is connected with one end of the power grid disturbance analog converter through the seventh switching circuit breaker And the other end of the third switching circuit breaker is connected with one end of a sixth switching circuit breaker through a bypass circuit breaker, the other end of the sixth switching circuit breaker is connected with the filter capacitor cabinet, and the filter capacitor cabinet is connected with a tested fan.
2. The wind turbine generator system grid adaptability testing device compatible with multiple voltage classes as claimed in claim 1, characterized in that: the first input transformer and the second input transformer are respectively dry-type transformers with transformation ratios of 66kV/35kV and 35kV/10 kV.
3. The wind turbine generator system grid adaptability testing device compatible with multiple voltage classes as claimed in claim 1, characterized in that: the first output transformer and the second output transformer are respectively dry-type transformers with transformation ratios of 10kV/35kV and 35kV/66 kV.
4. The device for testing the adaptability of the power grid of the wind turbine generator compatible with multiple voltage classes as claimed in claim 1, wherein: the auxiliary control system comprises a distribution transformer, a cooling fan, an illuminating lamp and a dehumidifier, one end of the distribution transformer is connected between the seventh switching circuit breaker and the power grid disturbance analog converter and used for converting a 10kV voltage level into a power frequency 400V voltage level, and the cooling fan, the illuminating lamp and the dehumidifier are respectively connected to the other end of the distribution transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220590157.4U CN217484426U (en) | 2022-03-18 | 2022-03-18 | Wind turbine generator system power grid adaptability test equipment compatible with multiple voltage levels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220590157.4U CN217484426U (en) | 2022-03-18 | 2022-03-18 | Wind turbine generator system power grid adaptability test equipment compatible with multiple voltage levels |
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| Publication Number | Publication Date |
|---|---|
| CN217484426U true CN217484426U (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220590157.4U Active CN217484426U (en) | 2022-03-18 | 2022-03-18 | Wind turbine generator system power grid adaptability test equipment compatible with multiple voltage levels |
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| CN (1) | CN217484426U (en) |
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2022
- 2022-03-18 CN CN202220590157.4U patent/CN217484426U/en active Active
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