CN219227444U - Energy storage converter and wind generating set - Google Patents

Abstract

The utility model relates to an energy storage converter and a wind generating set, which comprises an energy storage converter single cabinet, wherein the energy storage converter single cabinet comprises a protection system, the protection system comprises a protection cabinet and a heat exchanger connected with the protection cabinet, the protection cabinet is provided with a first cavity, a second cavity, an air inlet and an air outlet, the first cavity and the second cavity are arranged in a separated mode, the air inlet and the air outlet are communicated with the first cavity, and the cold end of the heat exchanger is positioned in the first cavity while the hot end of the heat exchanger is positioned in the second cavity; the first device group is arranged in the first chamber; the second device group is arranged in the second cavity, the heating value of the second device group in unit time is smaller than that of the first device group, a first fan is arranged in the first cavity, a second fan is arranged in the second cavity, the first fan drives external air flow to enter the first cavity through an air inlet, flow through the cold end and the first device group and are discharged through an air outlet, and the second fan drives internal air flow in the second cavity to flow and circularly contact with the hot end and the second device group. The utility model discloses each device of energy storage converter can dispel the heat evenly, and the security performance is high.

Description

Energy storage converter and wind generating set

Technical Field

The utility model relates to the technical field of energy storage and current transformation, in particular to an energy storage current transformer and a wind generating set.

Background

The energy storage converter (Power Conversion System, PCS) can control the charging and discharging processes of the storage battery to perform alternating current-direct current conversion, can directly supply power for an alternating current load under the condition of no power grid, and is widely applied to the fields of wind power and the like. When the energy storage converter operates, functional devices of the energy storage converter need to be protected, and meanwhile, a corresponding heat dissipation system needs to be arranged for heat dissipation and cooling of the energy storage converter so as to ensure that the energy storage converter can normally operate.

The protection heat dissipation system adopted by the existing electric appliance cabinet bodies such as the energy storage converter is usually an air conditioner or a fan arranged in the closed cabinet body, and the mode enables the functional devices with large heat productivity and the functional devices with relatively lower heat productivity to be mixed together, so that the problem of uneven heat dissipation exists, and the safety performance of the electric appliance cabinet bodies such as the energy storage converter is affected.

Disclosure of Invention

The embodiment of the utility model provides an energy storage converter and a wind generating set, wherein all devices of the energy storage converter can dissipate heat uniformly, and the safety performance is high.

In one aspect, an embodiment of the present utility model provides an energy storage converter, including an energy storage conversion single cabinet, the energy storage conversion single cabinet includes: the protection system comprises a protection cabinet and a heat exchanger connected to the protection cabinet, the protection cabinet is provided with a first chamber, a second chamber, an air inlet and an air outlet, the first chamber and the second chamber are arranged in a separated mode, the air inlet and the air outlet are communicated with the first chamber, the cold end of the heat exchanger is located in the first chamber, and the hot end of the heat exchanger is located in the second chamber; the first device group is arranged in the first chamber; the second device group is arranged in the second chamber, and the heating value of the second device group in unit time is smaller than that of the first device group; the first fan drives external air flow to enter the first chamber from the air inlet, flow through the cold end and the first device group and be discharged from the air outlet, and the second fan drives internal air flow in the second chamber to flow and be in circular contact with the hot end and the second device group.

According to one aspect of the embodiment of the present utility model, the first device group includes a reactor and an ac filter capacitor electrically connected to each other and both located on an external airflow circulation flow path, and the second device group includes an ac circuit breaker, an ac contactor, an ac filter, an IGBT power component, a dc contactor, and a dc circuit breaker electrically connected in sequence and both located on an internal airflow circulation path, and the reactor is electrically connected to the IGBT power component and the ac filter.

According to one aspect of the embodiment of the utility model, the first chamber and the second chamber are distributed along a first direction, the air inlet and the air outlet are distributed along a second direction, the second device group is arranged and comprises a direct current group and an alternating current group, the direct current group is positioned on one side of the second chamber in a third direction, the alternating current group is positioned on the other side of the second chamber in the third direction, the first direction, the second direction and the third direction are mutually intersected, the direct current group comprises a direct current contactor and a direct current breaker, and the alternating current group comprises an alternating current breaker, an alternating current contactor and an alternating current filter.

According to an aspect of the embodiment of the present utility model, the air outlet is located at a higher level than the air inlet in the second direction, and the ac breaker and the dc breaker are located at the bottom of the second chamber in the second direction.

According to one aspect of the embodiment of the utility model, the energy storage conversion single cabinet further comprises a controller arranged in the second cavity, the controller is positioned at the top of the second cavity along the second direction, and the controller is electrically connected with the first device group and the second device group.

According to one aspect of the embodiment of the utility model, the energy storage converter single cabinet further comprises a radiator, wherein the radiator comprises radiating fins and a base plate, the radiating fins are connected, the radiating fins are located in the first cavity and can exchange heat with external air flow flowing through the heat exchanger, and the base plate is inserted into the second cavity and connected with the IGBT power component.

According to one aspect of the embodiment of the utility model, the radiating fin is located at one side of the cold end facing the air outlet in the second direction, and the first fan drives external air flow from the air inlet into the first cavity to sequentially flow through the cold end, the radiating fin, the reactor and the alternating current filter capacitor and be discharged from the air outlet.

According to one aspect of the embodiment of the utility model, the energy storage converter comprises a plurality of energy storage conversion single cabinets, and the energy storage converter further comprises a bus bar, wherein the plurality of energy storage conversion single cabinets are arranged in parallel with the bus bar.

According to one aspect of the embodiment of the utility model, the plurality of energy storage current transformation single cabinets are arranged side by side along the same direction, the bus bars integrally extend along the arrangement direction of the plurality of energy storage current transformation single cabinets and are inserted into the protective cabinets of the energy storage current transformation single cabinets, and one end of each bus bar in the extending direction of the bus bars protrudes out of the protective cabinet of the outermost energy storage current transformation single cabinet to form an external terminal.

According to one aspect of the embodiment of the utility model, an internal air duct is arranged in the air inlet, the internal air duct is provided with inclined sections and vertical sections which are arranged in sequence and are communicated with each other, the inclined sections are in butt joint with the air inlet, the vertical sections are arranged at one ends of the inclined sections, which are away from the air inlet, the vertical sections are higher than the inclined sections, the cross section sizes of the inclined sections are gradually increased towards the side close to the vertical sections, and the vertical sections are of a uniform cross section structure.

In another aspect, an embodiment of the present utility model provides a wind generating set, including the energy storage converter described above.

According to the energy storage converter and the wind generating set provided by the embodiment of the utility model, the energy storage conversion single cabinet of the energy storage converter comprises a protection system, a first device group and a second device group, the protection cabinet of the protection system is provided with a first cavity, a second cavity, an air inlet and an air outlet, which are arranged in a separated mode, the air inlet and the air outlet are communicated with the first cavity, meanwhile, the protection system is provided with a heat exchanger, the cold end of the heat exchanger is positioned in the first cavity, the hot end of the heat exchanger is positioned in the second cavity, and the first device group with high heat productivity in unit time can be placed in the first cavity, and the second device group with relatively low heat productivity is placed in the second cavity. The second fan can drive the internal air in the second cavity to flow, and the internal air is in heat exchange with the second device group in the second cavity and then is in contact with the hot end of the heat exchanger, so that heat is transferred to the cold end of the heat exchanger through the hot end. Simultaneously, through the first fan can drive outside air current and get into first cavity and flow through cold junction and the first device group that is located in first cavity by the air inlet, take away the heat of cold junction and the functional device that is located in first cavity and discharge by the gas outlet. Through the separation setting of the first device group with high heating value and the second device group with low heating value to utilize the inside and outside circulation to realize the cooling heat dissipation of two, reduce the first device group with high heating value and exert an influence to the cooling heat dissipation of second device group, guarantee that the separation of two cooling heat dissipation goes on and the cooling heat dissipation of synchronization, improve the homogeneity to the cooling heat dissipation of first device group and second device group, and then improve energy storage converter's security performance.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a wind turbine generator system according to an embodiment of the present utility model;

figure 2 is an isometric view of an energy storage converter according to an embodiment of the present utility model from one perspective;

figure 3 is an isometric view of an energy storage converter according to an embodiment of the present utility model from another perspective;

fig. 4 is a schematic structural diagram of an energy storage converter according to an embodiment of the present utility model;

figure 5 is a schematic circuit diagram of an energy storage converter according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of an energy storage converter according to another embodiment of the present utility model;

FIG. 7 is a schematic diagram of a bus bar according to an embodiment of the present utility model.

100-an energy storage converter; 100 a-an energy storage conversion single cabinet;

10-a protective cabinet; 111 a-a first chamber; 111 b-a second chamber; 112-air inlet; 113-an air outlet; 12-a separator;

20-a heat exchanger; 21-cold end; 22-hot end;

31-a first fan; 32-a second fan;

40-arranging an air duct; 41-an inclined section; 42-vertical section;

50-a heat sink; 51-heat radiating fins; 52-a substrate;

60-busbar; 61-an external terminal;

70-a controller; 71-control panel; 72-a power panel;

a 2-reactor; 3-an alternating current filter capacitor; a 4-alternating current breaker, a 5-alternating current contactor, a 6-alternating current filter, a 7-IGBT power component and an 8-direct current contactor; 9-direct current circuit breaker; x-a first direction; y-a second direction; z-a third direction;

200-tower; 300-nacelle; 400-generator; 500-impeller; 510-hub; 520-blade.

In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the utility model are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the utility model by showing examples of the utility model. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present utility model; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The azimuth terms appearing in the following description are all directions shown in the drawings, and do not limit the specific structures of the energy storage converter and the wind generating set of the present utility model. In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

Referring to fig. 1, the embodiment of the application provides a wind generating set, the wind generating set includes a tower 200, a nacelle 300, a generator 400, an impeller 500 and an energy storage converter 100, the tower 200 is connected to a fan foundation, the nacelle 300 is disposed at the top end of the tower 200, the nacelle 300 can be connected with the tower 200 through a base, the impeller 500 includes a hub 510 and blades 520, the generator 400 is disposed at the nacelle 300, the impeller 500 is connected with the generator 400, when wind energy acts on the blades 520, the blades 520 drive the hub 510 to rotate and transfer kinetic energy converted from wind energy to the generator 400, and drive a rotor of the generator 400 to rotate relative to a stator, so as to realize conversion from wind energy to electric energy. The energy storage converter 100 may be provided with a nacelle 300, and the energy storage converter 100 may perform ac-dc conversion, and may directly supply power to an ac load in the absence of a power grid.

The protection heat dissipation system adopted by the existing energy storage converter 100 is generally an air conditioner or a fan arranged in the closed cabinet body 11, and the mode enables the functional devices with large heat productivity and the functional devices with relatively lower heat productivity to be mixed together, so that the problem of uneven heat dissipation exists, and the safety performance of the electric appliance cabinet body 11 such as the energy storage converter 100 is affected.

Based on this, the embodiment of the application provides a new energy storage converter 100, and each device of the energy storage converter 100 can dissipate heat uniformly, and has high safety performance.

Referring to fig. 2 to 5, the energy storage converter 100 provided in the embodiment of the present application includes an energy storage converter single cabinet 100a, the energy storage converter single cabinet 100a includes a protection system, a first device group and a second device group, the protection system includes a protection cabinet 10 and a heat exchanger 20 connected to the protection cabinet 10, the protection cabinet 10 has a first chamber 111a, a second chamber 111b, and an air inlet 112 and an air outlet 113 which are separately arranged and are communicated with the first chamber 111a, and a cold end 21 of the heat exchanger 20 is located in the first chamber 111a and a hot end 22 is located in the second chamber 111b. The first device group is disposed in the first chamber 111a. The second device group is disposed in the second chamber 111b, and the heat generation amount of the second device group per unit time is smaller than that of the first device group. The first fan 31 is disposed in the first chamber 111a, and the second fan 32 is disposed in the second chamber 111b, where the first fan 31 drives the external air flow from the air inlet 112 into the first chamber 111a, flows through the cold end 21 and the first device group, and is discharged from the air outlet 113, and the second fan 32 drives the internal air flow in the second chamber 111b to flow and circularly contact with the hot end 22 and the second device group.

The number of the energy storage current transformer 100a included in the energy storage current transformer 100 provided in this embodiment may be one, or may be more than two, and when the number is more than two, the two or more than two energy storage current transformer single cabinets 100a may be electrically connected to each other, for example, may be arranged in parallel.

The protective cabinet 10 may have a polygonal frame structure. The first chamber 111a and the second chamber 111b may be disposed in the cabinet 10 in a left-right manner, however, in some embodiments, the first chamber 111a and the second chamber 111b may be disposed in the cabinet 10 in an up-down manner.

The air inlet 112 and the air outlet 113 provided on the protection cabinet 10 are both communicated with the first chamber 111a, and the air inlet 112 and the air outlet 113 are provided at intervals on the protection cabinet 10, and may have a height difference in the height direction of the protection cabinet 10.

The hot end 22 and the cold end 21 of the heat exchanger 20 are communicated, and heat acquired by the hot end 22 can be transferred to the cold end 21. The first fan 31 and the second fan 32 may use a power source such as a fan.

The amount of heat generated by the second device group per unit time is smaller than that of the first device group, and can be understood as: at the same initial temperature and after the first device set and the second device set are operated for the same time without any cooling, the temperature in the first chamber 111a is higher than the temperature in the second chamber 111b.

According to the energy storage converter 100 provided by the embodiment of the application, the first device group with high heat productivity in unit time is arranged in the first chamber 111a, and the second device group with relatively low heat productivity is arranged in the second chamber 111b. The second fan 32 may drive the internal air in the second chamber 111b to flow and contact the hot end 22 of the heat exchanger 20 after heat exchange with the second device group in the second chamber 111b, and transfer heat to the cold end 21 of the heat exchanger 20 through the hot end 22. Meanwhile, the first fan 31 can drive the external air flow to enter the first chamber 111a from the air inlet 112, flow through the cold end 21 and the first device group in the first chamber 111a, take away the heat of the cold end 21 and the functional devices in the first chamber 111a, and then discharge from the air outlet 113. Through the separation setting of the first device group with high heating value and the second device group with low heating value to utilize the inside and outside circulation to realize the cooling heat dissipation of two, reduce the first device group with high heating value and exert an influence to the cooling heat dissipation of second device group, guarantee that the separation of two cooling heat dissipation goes on and the cooling heat dissipation of synchronization, improve the homogeneity to the cooling heat dissipation of first device group and second device group, and then improve energy storage converter 100's security performance.

And, above-mentioned setting can also make to place at the second cavity to steam, the sensitive functional device of dust, realizes the internal circulation cooling, prevents steam, dust to the destruction of second device group.

In some alternative embodiments, the energy storage converter 100 provided in the embodiments of the present application includes a first device group including the reactor 2 and the ac filter capacitor 3 electrically connected to each other and located on the external airflow circulation flow path, and a second device group including the ac circuit breaker 4, the ac contactor 5, the ac filter 6, the IGBT power module 7, the dc contactor 8, and the dc circuit breaker 9 electrically connected in sequence and located on the internal airflow circulation path, the reactor 2 being electrically connected to the IGBT power module 7 and the ac filter 6.

Because the heat productivity of the reactor 2 and the ac filter capacitor 3 in unit time is larger, and the sensitivity to water vapor and dust is relatively lower, the reactor 2 and the ac filter capacitor 3 are placed in the first chamber 111a, so that external air flow can be sequentially contacted with the reactor 2 and the ac filter capacitor 3 with larger heat productivity and perform heat exchange after entering the first chamber 111a under the action of the first fan 31, and the cooling and heat dissipation requirements of the reactor 2 and the ac filter capacitor 3 are facilitated.

Meanwhile, the heating value of the alternating current circuit breaker 4, the alternating current contactor 5, the alternating current filter 6, the IGBT power component 7, the direct current contactor 8 and the direct current circuit breaker 9 is smaller than that of the devices of the first device group, but the requirement on the protection level is high, such as the sensitivity to water vapor and dust is high, so that the devices are placed in the second chamber 111b for internal circulation, the influence of little water vapor or dust in external air flow is avoided, and the safety performance is ensured.

In some alternative embodiments, the energy storage converter 100 provided in the embodiments of the present application, the first chamber 111a and the second chamber 111b are distributed along the first direction X, the air inlet 112 and the air outlet 113 are distributed along the second direction Y, the second device group is disposed in a group and includes a dc group and an ac group, the dc group is located on one side of the second chamber 111b in the third direction Z, the ac group is located on the other side of the second chamber 111b in the third direction Z, the first direction X, the second direction Y and the third direction Z are disposed to intersect each other, the dc group includes the dc contactor 8, the dc breaker 9, and the ac group includes the ac breaker 4, the ac contactor 5 and the ac filter 6.

According to the energy storage converter 100 provided by the embodiment of the application, the first chamber 111a and the second chamber 111b are distributed along the first direction X, the air inlet 112 and the air outlet 113 are distributed along the second direction Y, and meanwhile, the alternating current group and the direct current group are distributed along the third direction Z, so that the structure of the energy storage converter 100 is clear, and the paths between devices with electric connection relationship are relatively short.

Alternatively, the first direction X, the second direction Y, and the third direction Z may be perpendicular to each other.

In some alternative embodiments, in the energy storage converter 100 provided in the embodiments of the present application, along the second direction Y, the air outlet 113 is located at a higher level than the air inlet 112, and the ac breaker 4 and the dc breaker 9 are located at the bottom of the second chamber 111b in the second direction Y.

Because the cold air flow is easy to drop and the hot air flow is easy to rise, the air inlet 112 is arranged above, so that the external air flow flowing out of the air inlet 112 can be quickly subjected to heat exchange with the cold end 21, then downwards runs and flows to the air outlet 113, through the arrangement, the cooling and heat dissipation of the first device group in the first chamber 111a can be ensured, and meanwhile, the heat dissipation of the cold end 21 can be inhibited from being influenced by the upward running of the heat emitted by the first device group in the first chamber 111a. Meanwhile, by locating the ac breaker 4 and the dc breaker 9 at the bottom of the second chamber 111b in the second direction Y, it is possible to facilitate in-out lines and facilitate electrical connection between devices.

In some alternative embodiments, the energy storage converter 100 provided in the embodiments of the present application, the energy storage converter single cabinet 100a further includes a controller 70 disposed in the second chamber 111b, the controller 70 is located at the top of the second chamber 111b along the second direction Y, and the controller 70 is electrically connected to the first device group and the second device group.

Optionally, the controller 70 may include a control board 71, a power board 72, and the like, for controlling the functional devices of the first device group and the second device group, to ensure control requirements.

In some optional embodiments of the energy storage converter 100 provided in the embodiments of the present application, the energy storage converter single cabinet 100a further includes a radiator 50, where the radiator 50 includes a connected radiating fin 51 and a base plate 52, and the radiating fin 51 is located in the first chamber 111a and can exchange heat with an external air flow flowing through the heat exchanger 20, and the base plate 52 is inserted into the second chamber 111b and is connected to the IGBT power component 7.

The base plate 52 of the radiator 50 can penetrate through the partition plate 12 of the protective cabinet 10 to partition and form the first chamber 111a and the second chamber 111b, corresponding notches are arranged on the partition plate 12, and the base plate 52 can be inserted into the notches and extend into the second chamber 111b, and meanwhile the notches are closed.

According to the energy storage converter 100, when the energy storage converter is used, the device IGBT power component 7 with larger heating value in the second chamber 111b can be connected with the substrate 52, heat is transferred to the radiating fins 51 through the substrate 52, so that external air flow enters the first chamber 111a and can exchange heat with the radiating fins 51 when the first chamber 111a flows through the radiating fins 51, heat dissipation of the device with larger heating value in the second chamber 111b is achieved, heat dissipation requirements of functional devices in the second chamber 111b are guaranteed, and protection heat dissipation level is improved.

In some optional embodiments, in the energy storage converter 100 provided in the embodiments of the present application, the heat dissipation fins 51 are located at a side of the cold end 21 facing the air outlet 113 in the second direction Y, and the first fan 31 drives the external air flow into the first chamber 111a from the air inlet 112 to sequentially flow through the cold end 21, the heat dissipation fins 51, the reactor 2, and the ac filter capacitor 3, and be discharged from the air outlet 113.

Through the above arrangement, the external air flow is firstly contacted with the cold end 21 and the heat dissipation fins 51 after entering the first chamber 111a under the driving of the first fan 31, so that the heat dissipation requirement of each functional device in the second chamber 111b adopting the internal circulation cooling heat dissipation mode is effectively ensured, and the influence of the overhigh temperature rise on the safety performance of the energy storage converter 100 is avoided.

As shown in fig. 6 and fig. 7, in some alternative embodiments of the energy storage converter 100 provided in the present application, the number of energy storage converter single cabinets 100a included in the energy storage converter 100 is plural, the energy storage converter 100 further includes a bus bar 60, and the plural energy storage converter single cabinets 100a are disposed in parallel with the bus bar 60.

The number of the energy storage current transformers 100a included in the energy storage current transformer 100 according to the embodiment of the present application may be two, three or even more, and a plurality of energy storage current transformers 100 may be arranged in parallel with the same bus bar 60.

In the energy storage converter 100 provided in the embodiment of the present application, each energy storage conversion single cabinet 100a is a conversion structure body with a complete energy storage conversion function. Can be used as an independent energy storage converter device. By including a plurality of energy storage current transformation single cabinets 100a and limiting that a plurality of energy storage current transformers 100 can be arranged in parallel with the same bus bar 60 to realize the expansion of the whole capacity of the energy storage current transformers 100, the energy storage current transformation single cabinets 100a can be adjusted according to different power requirements, and the energy storage current transformation single cabinets 100a have the flexibility, the simplicity and the easy integration of power combination.

Alternatively, each energy storage conversion cell 100a has a cell ac copper bar, and each energy storage conversion cell 100a may be electrically connected to the bus bar 60 via a respective cell ac copper bar to achieve the parallel connection requirements with each other.

In some optional embodiments, in the energy storage current transformer 100 provided in the embodiments of the present application, the plurality of energy storage current transformation single cabinets 100a are arranged side by side along the same direction, the bus bar 60 integrally extends along the arrangement direction of the plurality of energy storage current transformation single cabinets 100a and is inserted into the protective cabinet 10 of each energy storage current transformation single cabinet 100a to be arranged, and one end of the bus bar 60 in the extending direction of the bus bar is protruded out of the protective cabinet 10 of the outermost energy storage current transformation single cabinet 100a to be arranged and form the external connection terminal 61.

According to the energy storage converter 100 provided by the embodiment of the application, the plurality of energy storage converter single cabinets 100a are arranged side by side along the same direction, so that the bus bars 60 can extend along straight lines in the arrangement direction of the plurality of energy storage converter single cabinets 100a, inflection is not needed, the bus bars 60 are electrically connected with the energy storage converter single cabinets 100a in a direct plugging manner, installation is facilitated, and meanwhile, the bus bars 60 can be protected through the protection cabinets 10 of the energy storage converter single cabinets 100a, and the overall safety performance of the energy storage converter 100 is improved.

With continued reference to fig. 2 to 7, in some alternative embodiments, the energy storage converter 100 provided in the foregoing embodiments of the present application is provided with a built-in air duct 40 in the air inlet 112, the built-in air duct 40 has inclined sections 41 and vertical sections 42 that are sequentially disposed and mutually communicated, the inclined sections 41 are in butt joint with the air inlet 112, the vertical sections 42 are disposed at one ends of the inclined sections 41 facing away from the air inlet 112, the vertical sections 42 are higher than the inclined sections 41, from one end of the inclined sections 41 connected with the air inlet 112 to one end of the inclined sections 41 adjacent to the inclined sections 41, the cross-sectional dimensions of the inclined sections 41 are gradually increased, and the vertical sections 42 are of a uniform cross-sectional structure.

According to the protection and heat dissipation system provided by the embodiment of the application, the built-in air duct 40 is arranged to be the inclined section 41 and the vertical section 42, the size of the inclined section 41 is limited to be gradually increased, the inclined section 41 is arranged in a slope, rain, snow, dust and the like entering the built-in air duct 40 through the air inlet 112 are facilitated to slide under the action of gravity, the built-in air duct 40 is not easy to accumulate, and the protection level is ensured. Meanwhile, by the arrangement mode, the corners of the built-in air duct 40 can be smaller, and flow obstruction caused when external air flows into the first chamber 111a due to abrupt change of the cross section of the built-in air duct 40 can be avoided.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. An energy storage converter (100) characterized by comprising an energy storage converter cell (100 a), the energy storage converter cell (100 a) comprising:

the protection system comprises a protection cabinet (10) and a heat exchanger (20) connected to the protection cabinet (10), wherein the protection cabinet (10) is provided with a first chamber (111 a), a second chamber (111 b) and an air inlet (112) and an air outlet (113) which are arranged in a separated mode, the air inlet (112) and the air outlet (113) are communicated with the first chamber (111 a), a cold end (21) of the heat exchanger (20) is positioned in the first chamber (111 a), and a hot end (22) of the heat exchanger is positioned in the second chamber (111 b);

a first device group provided in the first chamber (111 a);

a second device group provided in the second chamber (111 b), the second device group having a smaller heat generation amount per unit time than the first device group;

the first fan (31) is arranged in the first chamber (111 a) and the second fan (32) is arranged in the second chamber (111 b), the first fan (31) drives external air flow to enter the first chamber (111 a) through the air inlet (112) to flow through the cold end (21) and the first device group and to be discharged through the air outlet (113), and the second fan (32) drives internal air flow in the second chamber (111 b) to flow and to be in circular contact with the hot end (22) and the second device group.

2. The energy storage converter (100) of claim 1, wherein the first device group comprises a reactor (2) and an ac filter capacitor (3) electrically connected to each other and both located on the external airflow circulation flow path, and the second device group comprises an ac circuit breaker (4), an ac contactor (5), an ac filter (6), an IGBT power assembly (7), a dc contactor (8) and a dc circuit breaker (9) electrically connected in sequence and both located on the internal airflow circulation path, the reactor (2) being electrically connected to the IGBT power assembly (7) and the ac filter (6).

3. Energy storage converter (100) according to claim 2, characterized in that the first chamber (111 a) and the second chamber (111 b) are distributed along a first direction (X), the air inlet (112) and the air outlet (113) are distributed along a second direction (Y), the second device group is arranged and comprises a dc group and an ac group, the dc group is located on one side of the second chamber (111 b) in a third direction (Z), the ac group is located on the other side of the second chamber (111 b) in the third direction (Z), the first direction (X), the second direction (Y) and the third direction (Z) are arranged intersecting each other, the dc group comprises the dc contactor (8) and the dc breaker (9), the ac group comprises the ac breaker (4), the ac contactor (5) and the ac filter (6).

4. -energy storage converter (100) according to claim 3, characterized in that, along the second direction (Y), the air outlet (113) is at a higher level than the air inlet (112), the ac circuit breaker (4) and the dc circuit breaker (9) being located at the bottom of the second chamber (111 b) in the second direction (Y);

and/or, the energy storage current transformation single cabinet (100 a) further comprises a controller (70) arranged in the second chamber (111 b), the controller (70) is positioned at the top of the second chamber (111 b) along the second direction (Y), and the controller (70) is electrically connected with the first device group and the second device group.

5. The energy storage converter (100) of claim 3, wherein the energy storage converter cell (100 a) further comprises a heat sink (50), the heat sink (50) comprises a heat dissipating fin (51) and a base plate (52) connected, the heat dissipating fin (51) is located in the first chamber (111 a) and is capable of exchanging heat with the external air flow flowing through the heat exchanger (20), and the base plate (52) is inserted into the second chamber (111 b) and is connected with the IGBT power assembly (7).

6. The energy storage converter (100) of claim 5, wherein the cooling fin (51) is located at a side of the cold end (21) facing the air outlet (113) in the second direction (Y), and the first fan (31) drives the external air flow from the air inlet (112) into the first chamber (111 a) to sequentially flow through the cold end (21), the cooling fin (51), the reactor (2) and the ac filter capacitor (3) and be discharged from the air outlet (113).

7. The energy storage converter (100) according to any of claims 1 to 6, the energy storage converter (100) comprising a plurality of energy storage converter cells (100 a), the energy storage converter (100) further comprising a bus bar (60), the plurality of energy storage converter cells (100 a) being arranged in parallel with the bus bar (60).

8. The energy storage converter (100) according to claim 7, wherein a plurality of energy storage converter single cabinets (100 a) are arranged side by side along a same direction, the bus bar (60) integrally extends along the arrangement direction of the plurality of energy storage converter single cabinets (100 a) and is inserted into the protection cabinet (10) of each energy storage converter single cabinet (100 a), and one end of the bus bar (60) in the extending direction protrudes out of the protection cabinet (10) of the outermost energy storage converter single cabinet (100 a) to form an external connection terminal (61).

9. The energy storage converter (100) according to any one of claims 1 to 6, wherein an internal air duct (40) is provided in the air inlet (112), the internal air duct (40) has inclined sections (41) and vertical sections (42) which are sequentially arranged and are mutually communicated, the inclined sections (41) are in butt joint with the air inlet (112), the vertical sections (42) are arranged at one ends of the inclined sections (41) which are away from the air inlet (112), the vertical sections (42) are higher than the inclined sections (41), and the cross-sectional dimensions of the inclined sections (41) are gradually increased towards the side close to the vertical sections (42), and the vertical sections (42) are of a uniform cross-sectional structure.

10. A wind power plant comprising an energy storage converter (100) according to any of claims 1 to 9.

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