CN219696981U - Electric system of wind generating set and wind generating set - Google Patents

Abstract

The utility model provides an electric system of a wind generating set and the wind generating set, wherein the electric system of the wind generating set comprises a shell, a converter, a transformer and a cooling system, the converter, the transformer and the cooling system are all arranged in the shell, the converter is connected to a generator of the wind generating set to convert electric energy from the generator into electric energy with constant voltage, the transformer is connected to the converter to boost the electric energy from the converter, and the cooling system is used for cooling both the converter and the transformer. According to the electric system of the wind generating set and the wind generating set, the problems that the electric system is complex in layout, inconvenient to install and maintain and high in cost are solved, the electric system is more compact in layout, a cooling system can be simplified, installation and maintenance are convenient, and the installation and operation cost of the wind generating set can be reduced.

Description

Electric system of wind generating set and wind generating set

Technical Field

The utility model relates to the technical field of electronic circuits, in particular to an electric system of a wind generating set and the wind generating set.

Background

Energy is the material basis for human survival and development, and is a key foundation stone for promoting sustainable development of socioeconomic. With the rapid development of human society economy, the demand of human society for energy is increasing, and the problem of energy shortage is increasingly prominent. Meanwhile, due to the current energy consumption structural characteristics (mostly fossil energy), excessive fossil energy consumption has started to generate serious ecological problems such as environmental pollution, and the like, and various problems of haze and greenhouse effect are affecting the normal life or development of human beings. Under the background, in order to solve the problems of energy shortage, environmental pollution and the like, clean, renewable and green energy sources such as wind energy are highly valued and rapidly developed, wherein wind power generation is widely applied and rapidly developed as the most mature application mode of wind energy.

With the continuous development of wind power generation technology, wind power generation sets have a trend of increasing in size, the installation layout of each device, equipment has become complicated, and the cost has tended to increase. Specifically, taking the installation layout of the electric primary system of the land wind generating set as shown in fig. 1 as an example, the electric system of the wind generating set may include a first converter cabinet 11, a second converter cabinet 12, a main control cabinet 13, a water cooling cabinet 14, a converter cooling system 15, an auxiliary transformer device 16 and a boost power transformation system 17 disposed outside the tower, where the converter cooling system 15 is used for cooling converters in the first converter cabinet 11 and the second converter cabinet 12. The step-up transformer system 17 includes a step-up transformer and a variable-voltage cooling system for cooling the step-up transformer.

As can be seen from the example of fig. 1, due to the enlargement of the wind turbine generator system, the installation scheme of arranging the electrical equipment in the conventional tower on the same tower (or tower drum) platform is not applicable any more, part of the converter and the water cooling cabinet cannot be arranged on the same tower (or tower drum) platform, the step-up transformer is arranged outside the tower, and cooling systems are required to be respectively arranged for the converter and the transformer, so that the layout of the electrical system of the wind turbine generator system is very complex, the layout positions and the installation sequence rationality of the converter and the transformer and the respective cooling systems are required to be considered, the installation efficiency is not improved, the centralized maintenance in the later period is also not facilitated, and the cost is also high.

Disclosure of Invention

In view of the problems that an electrical system of an existing wind turbine generator system is complex in layout, inconvenient to install and maintain and high in cost, the utility model provides the electrical system of the wind turbine generator system and the wind turbine generator system.

An aspect of the present utility model provides an electrical system of a wind power generation set, the electrical system of the wind power generation set including a housing, a converter, a transformer, and a cooling system, the converter, the transformer, and the cooling system being all disposed within the housing, the converter being connected to a generator of the wind power generation set to convert electric energy from the generator into electric energy of constant voltage, the transformer being connected to the converter to boost the electric energy from the converter, the cooling system being for cooling both the converter and the transformer.

Optionally, the electrical system of the wind generating set further comprises a first circuit breaker, one end of the first circuit breaker is connected to the current transformer, the other end of the first circuit breaker is connected to the low-voltage side of the transformer, a first compartment is arranged in the shell, and the current transformer and the first circuit breaker are arranged in the first compartment.

Optionally, the electrical system of the wind generating set further comprises a second circuit breaker connected to the high voltage side of the transformer, a second compartment is provided in the housing, and the transformer and the second circuit breaker are provided in the second compartment.

Optionally, an insulating compartment is disposed in the housing, the first compartment and the second compartment being disposed on opposite sides of the insulating compartment, the insulating compartment being configured to electrically isolate the first compartment from the second compartment.

Optionally, the electrical system of the wind generating set further comprises an auxiliary transformer loop and a control system, one end of the auxiliary transformer loop is connected between the converter and the transformer, the other end of the auxiliary transformer loop is connected to the control system, the auxiliary transformer loop comprises an auxiliary loop breaker and an auxiliary transformer, the auxiliary transformer transforms the electric energy output from the transformer, and the transformed electric energy is provided to the control system.

Optionally, the auxiliary voltage transformation circuit and the control system are disposed within the first compartment.

Optionally, the cooling system includes a cooling pump and a circulation line, the electrical system further includes a first radiator and a second radiator, the first radiator is disposed at the current transformer, the second radiator is disposed at the transformer, the cooling pump causes a cooling liquid to flow in the circulation line, and the circulation line passes through the first radiator and the second radiator to cool the current transformer and the transformer.

Another aspect of the utility model provides a wind power plant comprising an electrical system of a wind power plant according to an exemplary embodiment of the utility model.

Optionally, the wind generating set further comprises a tower, and the electrical system is arranged outside the tower.

Optionally, the connection cable of the electrical system extends from the ground below the tower to the interior of the tower.

According to the electric system of the wind generating set and the wind generating set, the converter and the transformer of the wind generating set can be arranged in the same shell, the cooling system can be arranged in the shell to cool the converter and the transformer, so that the layout of the electric system is more compact, the cooling system can be simplified, and the cooling of the converter and the transformer can be realized through one set of cooling system, thus the concentrated installation and maintenance of the converter and the transformer can be conveniently carried out, the line connection between the converter and the transformer is simplified, the installation and maintenance are convenient, the working efficiency is improved, and the installation and operation cost of the set can be reduced.

Drawings

The foregoing and/or additional aspects and advantages of the present utility model will be apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein it is to be understood that the following drawings illustrate only certain embodiments of the utility model and are therefore not to be considered limiting of its scope. In the drawings:

fig. 1 is an installation schematic of an electrical primary system of a land wind power generator set according to the related art.

Fig. 2 is a schematic view of a wind power generation set according to the related art.

FIG. 3 is a schematic view of a wind power generator set according to an exemplary embodiment of the utility model.

FIG. 4 is a perspective view of a housing of an electrical system of a wind turbine generator system according to an exemplary embodiment of the present utility model.

FIG. 5 is an internal schematic view of a housing of an electrical system of a wind turbine generator system according to an exemplary embodiment of the utility model.

FIG. 6 is a schematic view of a wind power generator set according to an exemplary embodiment of the utility model.

Reference numerals illustrate:

11: a first converter cabinet; 12: the second converter cabinet; 13: a master control cabinet; 14: a water-cooled cabinet; 15: a variable flow cooling system; 16: an auxiliary voltage transformation device; 17: a boost power transformation system; 21. 110: a blade; 22. 120: a generator; 23. 130: a current transformer; 24: a current transformer network side breaker; 25: a low-voltage side breaker of the transformer; 26: a transformer body; 140: a transformer; 27: a high-voltage side breaker of the transformer; 28: a high-voltage side isolating switch of the transformer; 31. 171: an auxiliary circuit breaker; 32. 172: an auxiliary transformer; 33: a master control system; 151: a cooling pump; 152: a circulation line; 131: a first heat sink; 141: a second heat sink; 161: a first circuit breaker; 162: a second circuit breaker; 163: an isolating switch; 180: a control system; 200: a housing; 210: a first compartment; 220: a second compartment; 230: an insulating compartment; 10: an electrical system; 20: and a tower barrel.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order of operations described herein is merely an example and is not limited to those set forth herein, but may be altered as will be apparent after an understanding of the disclosure of the utility model, except for operations that must occur in a specific order. Furthermore, descriptions of features known in the art may be omitted for clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after an understanding of the present disclosure.

As used herein, the term "and/or" includes any one of the listed items associated as well as any combination of any two or more.

Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, first component, first region, first layer, or first portion referred to in the examples described herein may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples.

In the description, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" or "coupled to" the other element, it can be directly "on" the other element, be directly "connected to" or be "coupled to" the other element, or one or more other elements intervening elements may be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" or "directly coupled to" another element, there may be no other element intervening elements present.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, amounts, operations, components, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, amounts, operations, components, elements, and/or combinations thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. Unless explicitly so defined herein, terms (such as those defined in a general dictionary) should be construed to have meanings consistent with their meanings in the context of the relevant art and the present utility model and should not be interpreted idealized or overly formal.

In addition, in the description of the examples, when it is considered that detailed descriptions of well-known related structures or functions will cause ambiguous explanations of the present utility model, such detailed descriptions will be omitted.

In order to enable one skilled in the art to utilize the teachings of the present utility model, the following exemplary embodiments are presented in terms of particular application scenarios, particular system, device and component parameters and particular manner of connection. However, it will be apparent to those having ordinary skill in the art that these embodiments are merely examples, and that the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the utility model.

Further, in order to clearly show the relationship between components or internal configurations, etc., components and structures, etc., which are not related to the described exemplary embodiments, such as the energy storage deflector and the energy storage system, are omitted in the drawings, and these omitted components and structures may be implemented in any form known to those skilled in the art.

As described above, in the electrical system of the wind power generation set of fig. 1, it is necessary to provide cooling systems for the converter and the transformer, respectively, which makes the layout of the electrical system of the set very complicated, inconvenient to install and maintain, and costly.

Specifically, fig. 2 shows a schematic electrical circuit diagram of a wind power plant corresponding to fig. 1. As shown in fig. 2, the main circuit of the wind power generation set may include a blade 21, a generator 22, a converter 23, a converter grid side breaker 24, a transformer low side breaker 25, a transformer body 26, a transformer high side breaker 27, and a transformer high side isolation switch 28, wherein the converter 23, the converter grid side breaker 24, the transformer low side breaker 25, the transformer body 26, the transformer high side breaker 27, and the transformer high side isolation switch 28 are electrically connected in sequence to convert and transmit the electric energy from the generator 22 to a wind farm collector system to provide the electric energy to a grid connection point through the wind farm collector system. Here, the converter 23 may be disposed in the first converter cabinet 11 and the second converter cabinet 12 of fig. 1, and the transformer body 26 may be a step-up transformer in the step-up power transformation system 17 of fig. 1.

In addition, the wind power generation set may further include a secondary circuit, which may include an auxiliary circuit breaker 31, an auxiliary transformer 32, and a main control system 33, wherein the auxiliary circuit breaker 31 may be connected between the converter grid side breaker 24 and the transformer low voltage side breaker 25, and the auxiliary transformer 32 may transform the electric power from the transformer body 26 to supply an internal load of the wind power generation set, such as the main control system 33, based on the transformed electric power. Here, the main control system 33 may be provided in the main control cabinet 13 of fig. 1, and the auxiliary transformer 32 may be provided in the auxiliary transformer device 16 of fig. 1, for example.

In the example of fig. 2, the converter 23, the converter grid side breaker 24, and the auxiliary circuit breaker 31, the auxiliary transformer 32, the main control system 33, etc. in the main circuit of the wind turbine are all installed in the tower (or tower drum) of the wind turbine. Furthermore, cooling equipment of the inverter cooling system, such as a main machine (e.g. the waterbox 14, the inverter cooling system 15 of fig. 1) and auxiliary electrical equipment associated with the inverter 23, the main control system 33 are mounted within the tower. While the transformer low-side circuit breaker 25 (or also the disconnector) in the main circuit of the wind power plant, the transformer body 26, the transformer high-side circuit breaker 27 and the transformer high-side disconnector 28 are all mounted outside the tower.

In such a scheme, an electrical system in the tower such as a converter and an electrical system outside the tower such as a transformer may be in charge of being matched by different personnel, which may not facilitate the coordinated installation inside and outside the tower, and affect the working efficiency.

In addition, the electrical systems such as transformers and converters are generally sent to the installation site directly after leaving the factory, and when the electrical systems such as transformers and converters are provided by different providers, the electrical systems may be scattered for shipping and transportation, so that the transportation links of the electrical equipment are excessively dispersed, and the comprehensive cost is relatively high. In addition, the field installation of the electrical system needs to be synchronous with the installation of the tower, and if progress problems occur in the electrical equipment with excessively dispersed transportation links, the field installation progress is affected, so that unnecessary economic loss is caused.

In addition, in the case where the capacity of the single wind turbine generator system is increasing, the size of the electric equipment (such as the converter, the main control cabinet, the water cooling cabinet, etc.) at the bottom of the tower is getting larger, the number is getting larger, and it is difficult to install the electric equipment on the same platform as in the conventional scheme. In this regard, in some versions, the number of platforms within the tower that are available for electrical equipment installation may be increased, for example, in fig. 1, the first and main control cabinets 11 and 13, the second and waterboxes 12 and 14, and the variable flow cooling system 15 and auxiliary transformer 16 are disposed on different levels of platforms within the tower, respectively; alternatively, in other arrangements, the tower inner diameter may be increased to increase space on the same platform. Here, the former has a great influence on the cost of the tower by increasing the amount of tower material; the latter is due to many reasons such as maintenance replacement cost of electric components, complexity of installation layout design, influence factors on the tower, and the like, the comprehensive cost is also greatly increased, and the safety risk is increased.

In general, under the condition that the layout of an electric system of the wind generating set is not optimally designed, the working efficiency is low, the electricity cost is not reduced, the comprehensive cost is high, and the development trend of wind power price reduction is not met.

In view of the above, exemplary embodiments according to the present utility model provide an electrical system of a wind power generator set and a wind power generator set to at least solve or alleviate at least one of the above problems.

According to a first aspect of the utility model, an electrical system of a wind power plant is provided. An exemplary structure of an electrical system of a wind turbine generator set according to an exemplary embodiment of the present utility model will be described below with reference to fig. 3 to 5.

As shown in fig. 3 and 4, a wind turbine may include blades 110, a generator 120, and an electrical system that may include a converter 130, a transformer 140, and a cooling system. The blades 110 may convert wind energy into mechanical energy, and the generator 120 may convert the mechanical energy from the blades 110 into electrical energy, thereby outputting alternating current.

The converter 130 may be connected to the generator 120 to convert the electric energy from the generator into electric energy of constant voltage. As an example, in the case where the wind generating set is an AC generating set, the converter 130 may be an AC/AC converter to convert the AC power from the generator 120 into AC power with constant voltage and frequency, where there may be fluctuation in the voltage and frequency of the AC power output by the generator 120, and the converter 130 may convert the AC power into AC power with constant voltage and frequency that satisfies the grid-connected requirement according to the grid-connected requirement of the set. In the case where the wind generating set is a direct current generating set, the converter 130 may be an AC/DC converter to convert the alternating current from the generator 120 into direct current with constant voltage.

The transformer 140 may be connected to the converter 130 to boost the power from the converter 130, for example, to a preset grid-tie voltage. The transformer 140 may be an ac transformer or a dc transformer.

A cooling system may be used to cool both the converter 130 and the transformer 140. As an example, the cooling system may include a cooling pump 151 and a circulation line 152, and the cooling pump may pump the cooling liquid such that the cooling liquid circulates in the circulation line, and the circulation line may pass through the inverter 130 and the transformer 140 to carry away heat generated by the inverter 130 and the transformer 140 by a flow of the cooling medium in the circulation line, thereby achieving cooling.

As an example, the electrical system may further include a first radiator 131 and a second radiator 141, the first radiator may be disposed at the current transformer 130, the second radiator may be disposed at the transformer 140, the cooling pump 151 may flow the cooling liquid in the circulation line 152, and the circulation line 152 may pass through the first radiator 131 and the second radiator 141 to cool the current transformer 130 and the transformer 140. As an example, the first and second heat sinks may be formed as heat radiating fins, and the circulation line 152 may pass through the middle of the heat radiating fins to take away heat. However, the specific forms of the first heat sink and the second heat sink are not limited thereto, and may be any heat sink as long as the heat dissipation of the current transformer and the transformer is possible.

According to an exemplary embodiment of the present utility model, as shown in fig. 4, the electrical system of the wind power generation set may further include a housing 200, and the above-described converter 130, transformer 140, and cooling system may be disposed within the housing 200. Therefore, on one hand, the layout of the converter, the transformer and the cooling system is more compact, and on the other hand, the cooling systems of the converter and the transformer can be designed integrally, so that the layout of the cooling system is simplified, and the cooling cost of the main loop electric system is reduced.

By way of example, the housing 200 may be a container, or other enclosure capable of housing a converter, transformer, and cooling system.

Furthermore, according to an exemplary embodiment of the present utility model, the electrical system of the wind generating set may further include a first circuit breaker 161, one end of the first circuit breaker 161 may be connected to the current transformer 130, and the other end of the first circuit breaker 161 may be connected to the low voltage side of the transformer 140. The first circuit breaker 161 may be a low voltage circuit breaker that may be used to control opening and closing of an electrical circuit between the current transformer 130 and the transformer 140.

Fig. 4 shows an internal schematic view of a housing of an electrical system of a wind power plant according to an exemplary embodiment of the utility model. As shown in fig. 4, a first compartment 210 may be provided in the case 200, and the current transformer 130 and the first circuit breaker 161 may be provided in the first compartment 210. Here, the first compartment 210 may serve as a low voltage chamber for accommodating electrical equipment at the low voltage side of the transformer 140.

According to the exemplary embodiment of the present utility model, since both the current transformer 130 and the transformer 140 are disposed in the case 200, the physical distance therebetween is shortened, and thus, only one first circuit breaker 161 may be disposed therebetween through the low voltage chamber integrated design, for example, any one of the current transformer net side circuit breaker 24 and the transformer low voltage side circuit breaker 25 shown in fig. 2 is omitted, the system hardware cost is reduced, and the system safety and reliability are improved.

Furthermore, the electrical system of the wind power plant may further comprise a second circuit breaker 162, which second circuit breaker 162 may be connected to the high voltage side of the transformer 140. The second circuit breaker 162 may be a high voltage circuit breaker that may be used to control the opening and closing of the electrical circuit between the transformer 140 and the grid connection of the unit.

As shown in fig. 4, a second compartment 220 may be further provided within the housing 200, and the transformer 140 and the second circuit breaker 162 may be provided within the second compartment 220. Here, the second compartment 220 may serve as a high voltage chamber for accommodating electrical equipment at the high voltage side of the transformer 140. Thus, by arranging the first compartment and the second compartment respectively, the high-low voltage part can be strictly separated under the condition that the electric systems inside and outside the tower are integrally designed, and the safety of the electric systems is ensured.

As an example, an insulating compartment 230 may also be provided within the housing 200, and the first compartment 210 and the second compartment 220 may be provided on opposite sides of the insulating compartment 230, and the insulating compartment 230 may serve to electrically isolate the first compartment 210 and the second compartment 220. As an example, the distance between the two sides of the insulation compartment 230 may be greater than or equal to the minimum electrical isolation distance of the transformer 130 from the transformer 140. By arranging the insulating compartment, electromagnetic interference can be prevented from being generated between the current transformer and the transformer, and the safety of the electric system during integration is further improved.

Furthermore, the electrical system of the wind power plant may further comprise a disconnector 163, which disconnector 163 may be arranged on the high voltage side of the transformer 140, for example between the second circuit breaker 162 and the grid connection of the plant, to achieve isolation between the plant and the grid.

In addition, the electrical system of the wind generating set may further include an auxiliary transforming loop and a control system 180, one end of the auxiliary transforming loop may be connected between the converter 130 and the transformer 140, and the other end of the auxiliary transforming loop may be connected to the control system 180, so that the control system may be powered by the auxiliary transforming loop to implement internal control of the wind generating set. However, the auxiliary transformer loop is not limited thereto, but it may also supply other internal loads of the wind power plant, such as the circuit breakers and disconnectors described above, etc.

Here, the auxiliary transforming loop may include an auxiliary loop breaker 171 and an auxiliary transformer 172, the auxiliary loop breaker 171 may be connected between the converter 130 and the auxiliary transformer 172, the auxiliary transformer 172 may transform electric power from the transformer 140 (e.g., electric power input from a grid side at a start-up of the wind turbine, and provide the transformed electric power to the control system 180, and may also provide the transformed electric power to other internal loads of the wind turbine, such as the breakers and disconnectors described above, and the like.

As an example, the auxiliary variable-pressure circuit and control system 180 may also be disposed within the first compartment 210.

It should be noted that fig. 3, 4 and 5 show only an example of a wind power plant and that it mainly shows what is relevant to the devices or apparatuses described herein or to be described, other devices and apparatuses not relevant to the inventive concept to be described herein are not shown and described here, which may be arranged according to the general knowledge of the art.

Furthermore, it should be noted that the above-described devices or apparatuses such as the current transformer, the transformer, and the cooling system may be of any form and configuration, and the present disclosure is not limited in particular thereto, and may be of any form and configuration capable of realizing the respective functions.

According to the exemplary embodiment of the utility model, as the original tower inner parts such as the converter and the original tower outer parts such as the transformer are arranged outside the tower, the wiring distance between the devices is shortened, so that the length of a primary loop (shown as a dotted line in fig. 1) and the length of a secondary loop (shown as a solid line in fig. 1) of the electrical system are shortened, and the system cost is reduced.

Further, according to the exemplary embodiments of the present utility model, since all electrical devices of an electrical system can be installed into a housing such as a container before shipment and preconditions such as joint debugging test are easily obtained, the operation time period of installation, pre-test, and debugging in the field is effectively reduced.

Furthermore, according to the exemplary embodiments of the present utility model, since all electrical devices of the electrical system can be uniformly transported through the standard container, progress is controllable, and overall transportation costs are reduced.

Furthermore, according to exemplary embodiments of the present utility model, the monitoring circuit may be designed in an integrated manner, since the current transformer, the cooling system, the switching devices and the related electrical components are integrated within one housing, such as a cabin or a container.

Another aspect of the present utility model provides a wind power plant, as shown in fig. 6, which may include an electrical system 10 of a wind power plant according to an exemplary embodiment of the present utility model. Here, the wind power generation set may be, for example, a land wind power generation set, but it is not limited thereto, and it may be an offshore wind power generation set.

As shown in fig. 6, the wind power generation set may further include a tower 20, and the electrical system 10 may be disposed outside of the tower 20. In this way, the interior of the tower can be free of any electric component, the number of original platforms which can be used for supporting the weight of the electric component in the interior of the tower is reduced, holes (such as cooling water pipes for entering and exiting and the like) are not needed in the tower wall, in addition, the bearing requirements of the platforms or the tower wall are also reduced, and the additional load on the tower is reduced, so that an electric system is arranged outside the tower, the comprehensive cost of the installation layout of the tower and the tower bottom is reduced, and the safety and the reliability of the tower are facilitated.

In this exemplary embodiment, as shown in fig. 5, the connection cables of the electrical system 10 may extend from the ground below the tower 20 to the interior of the tower 20. Here, the connection cable may be a bus of the entire electrical system 10, and wiring between internal components of the electrical system 10 is provided in the housing 200, so wiring from the electrical system 10 into the tower 20 (for example, into the generator 120) may be simplified. Here, because the electrical system is arranged outside the tower, the installation of the tower and the electrical system can be independent of each other, so that the hoisting progress of the tower is not influenced by the progress of the integrally arranged electrical system to the site.

According to the electric system of the wind generating set and the wind generating set, an integrated layout scheme of the main loop electric system and accessories thereof, such as an integrated converter, a transformer, a main control system, a switch component, a water cooling system and the like, is realized, so that the layout of the electric system is more compact, the cooling system can be simplified, the installation and maintenance are convenient, and the installation and operation cost of the set can be reduced.

In addition, according to the electric system of the wind generating set and the wind generating set, which are disclosed by the utility model, due to the fact that the electric system adopts the tower outer layout, the adverse effect of tower vibration on electrified operation components can be avoided, and the safety and reliability of the electric system are improved.

Furthermore, the electrical system of the wind power generation unit and the wind power generation unit according to the exemplary embodiments of the present utility model do not affect the tower when a serious electrical failure occurs in the case that an off-tower layout is adopted for the electrical system.

In addition, according to the electrical system of the wind generating set and the wind generating set, which are disclosed by the embodiment of the utility model, the electrical system is arranged outside the tower, so that the heat dissipation design of the electrical system is more flexibly configured, the cost is reduced, and the safety coefficient of the tower system is improved.

Although the circuits, devices, modules and apparatus shown in the above exemplary embodiments may be formed in any manner known to those skilled in the art as long as they are capable of performing the corresponding functions.

Although exemplary embodiments of the present utility model have been described in detail above, various modifications and variations may be made to the embodiments of the present utility model by those skilled in the art without departing from the spirit and scope of the utility model. It should be understood that such modifications and variations will still fall within the spirit and scope of the exemplary embodiments of the utility model as defined by the appended claims as seen by those skilled in the art.

Claims (10)

1. An electric system of a wind generating set is characterized by comprising a shell, a converter, a transformer and a cooling system, wherein the converter, the transformer and the cooling system are all arranged in the shell,

the converter is connected to a generator of the wind power generator set to convert electric energy from the generator into electric energy with constant voltage,

the transformer is connected to the converter to boost the power from the converter,

the cooling system is used for cooling both the converter and the transformer.

2. The electrical system of a wind power generator set according to claim 1, further comprising a first circuit breaker, one end of the first circuit breaker being connected to the current transformer, the other end of the first circuit breaker being connected to a low voltage side of the transformer,

a first compartment is disposed within the housing, and the current transformer and the first circuit breaker are disposed within the first compartment.

3. The electrical system of a wind power generator set according to claim 2, further comprising a second circuit breaker connected to the high voltage side of the transformer,

a second compartment is disposed within the housing, and the transformer and the second circuit breaker are disposed within the second compartment.

4. An electrical system of a wind power plant according to claim 3, wherein an insulating compartment is provided in the housing, the first and second compartments being provided on opposite sides of the insulating compartment, the insulating compartment being for electrically isolating the first and second compartments.

5. An electrical system of a wind power plant according to claim 2, wherein the electrical system of the wind power plant further comprises an auxiliary voltage transformation loop and a control system, one end of the auxiliary voltage transformation loop being connected between the converter and the transformer, the other end of the auxiliary voltage transformation loop being connected to the control system,

the auxiliary transformer loop includes an auxiliary loop breaker and an auxiliary transformer that transforms the electrical energy from the transformer and provides the transformed electrical energy to the control system.

6. The electrical system of a wind turbine of claim 5, wherein the auxiliary voltage transformation circuit and the control system are disposed within the first compartment.

7. The electrical system of a wind turbine of claim 2, wherein the cooling system comprises a cooling pump and a circulation line, the electrical system further comprising a first radiator disposed at the converter and a second radiator disposed at the transformer, the cooling pump flowing a cooling liquid in the circulation line, the circulation line passing through the first radiator and the second radiator to cool the converter and the transformer.

8. A wind power plant, characterized in that the wind power plant comprises an electrical system of a wind power plant according to any of claims 1 to 7.

9. The wind power generator set of claim 8, further comprising a tower, wherein the electrical system is disposed external to the tower.

10. The wind power generator set of claim 9, wherein the connection cable of the electrical system extends from the ground below the tower to the interior of the tower.