Capacitor pool heat dissipation structure and converter

Abstract

The utility model discloses a capacitor pool heat dissipation structure and a converter, the capacitor pool heat dissipation structure comprises a capacitor pool group arranged in a converter cabinet body, and the capacitor pool group comprises a capacitor pool shell and a capacitor; a heat dissipation air duct is arranged in the capacitor pool shell, and the heat dissipation air duct is isolated from the inner cavity of the converter cabinet body; the capacitor shell of the capacitor is at least partially located in the heat dissipation air channel, the capacitor pool shell is further provided with a shell air inlet and a shell air outlet which are both communicated with the heat dissipation air channel, and the shell air inlet and the shell air outlet are both used for being communicated with the external environment. According to the capacitor pool heat dissipation structure, air cooling heat dissipation of the capacitor is realized, and the heat dissipation cost of the capacitor is reduced; and the air flowing through the heat dissipation air channel is prevented from influencing devices in the inner cavity of the converter cabinet body, so that the protection performance of the converter is improved, and the protection cost of the converter is also reduced. Therefore, the heat dissipation structure of the capacitor pool meets the requirements of the converter on low cost and high protection.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and more specifically, to a capacitor pool heat dissipation structure and a converter. Background Art

[0002] The development of new energy sources such as wind energy is becoming more and more widespread, and the application environment includes areas with heavy desert dust and severe salt fog at sea. Therefore, the protection requirements for converters in wind power generation are becoming higher and higher. However, the high protection design will inevitably lead to the problem of soaring converter costs, which is contrary to the parity of new energy access and popularization of applications. Therefore, low-cost high-protection converters still need to be continuously studied in depth.

[0003] As a core component in the converter, capacitors are used in large quantities. Especially as the power of the converter increases, the number of capacitors used in a single converter is also increasing rapidly. Capacitors have high requirements for heat dissipation, so the heat dissipation of capacitors plays a decisive role in the protection and cost of the converter.

[0004] For air-cooled converters, external air enters the cabinet, and the heat dissipation airflow intersects with other components inside the cabinet except capacitors, which will affect other components and cause the converter's protection performance to be lower. If the converter's protection performance is to be improved, the converter's protection will be more complicated and the converter's protection cost will be higher.

[0005] For water-cooled converters, outside air is prevented from entering the cabinet, which improves the protection performance of the converter and reduces the protection cost of the converter. However, a heat sink or water-cooled plate or other heat dissipation structure is required to dissipate the heat of the capacitor, resulting in a high heat dissipation cost for the capacitor, which makes the cost of the entire converter high.

[0006] In summary, how to dissipate heat from capacitors to reduce the heat dissipation cost of the capacitors and the high protection cost of the converter, thereby meeting the converter's requirements for low cost and high protection, is a problem that currently needs to be solved urgently by those skilled in the art. Utility Model Content

[0007] In view of this, the purpose of the present application is to provide a capacitor pool heat dissipation structure and a converter to reduce the heat dissipation cost of the capacitor and the high protection cost of the converter, thereby meeting the converter's requirements for low cost and high protection.

[0008] In order to achieve the above objectives, this application provides the following technical solutions:

[0009] A capacitor pool heat dissipation structure, characterized by comprising: a capacitor pool group for being arranged in a converter cabinet, the capacitor pool group comprising a capacitor pool housing and a capacitor;

[0010] Wherein, a heat dissipation duct is provided in the capacitor pool housing, and the heat dissipation duct and the inner cavity of the converter cabinet are isolated from each other;

[0011] The capacitor housing of the capacitor is at least partially located in the heat dissipation air duct, and the capacitor pool housing also has a housing air inlet and a housing air outlet both connected to the heat dissipation air duct, and the housing air inlet and the housing air outlet are both used to communicate with the external environment of the converter cabinet.

[0012] Optionally, the capacitor terminal of the capacitor is arranged outside the capacitor housing, and the entire capacitor terminal is located outside the heat dissipation duct.

[0013] Optionally, the capacitor terminal is at least partially located in the capacitor pool housing, or one end of the capacitor terminal connected to the capacitor housing is embedded in a shell plate of the capacitor pool housing;

[0014] The entire capacitor housing is located inside the capacitor pool housing, and the capacitor housing and the capacitor pool housing are sealed and connected.

[0015] Optionally, an end face of the capacitor terminal provided in the capacitor housing is sealed and connected to the capacitor pool housing.

[0016] Optionally, the end surface of the capacitor housing on which the capacitor terminal is disposed is sealed and connected to the capacitor cell housing via a seal; or, the end surface of the capacitor housing on which the capacitor terminal is disposed is contact-sealed with the capacitor cell housing.

[0017] Optionally, the entire end surface of the capacitor housing on which the capacitor terminal is provided is sealed and connected to the capacitor pool housing; or, the end surface of the capacitor housing on which the capacitor terminal is provided has a protrusion, and the protrusion is sealed and connected to the capacitor pool housing.

[0018] Optionally, the entire capacitor terminal is located outside the capacitor pool housing, one end of the capacitor terminal provided in the capacitor housing extends outside the capacitor pool housing, and the capacitor housing and the capacitor pool housing are sealed and connected.

[0019] Optionally, the circumferential side wall of the capacitor housing is sealed to the capacitor cell housing.

[0020] Optionally, a capacitor terminal of the capacitor is arranged outside the capacitor housing, and the capacitor terminal is at least partially located in the heat dissipation duct.

[0021] Optionally, the capacitor pool housing includes a capacitor pool frame and a closing piece, the closing piece closes the capacitor pool frame, and the housing air inlet and housing air outlet are both arranged on the capacitor pool frame.

[0022] Optionally, the capacitor terminal of the capacitor is arranged outside the capacitor housing. When the capacitor terminal is at least partially located outside the capacitor pool housing, the capacitor terminal or the capacitor housing passes through the sealing member.

[0023] Optionally, the capacitor pool heat dissipation structure further includes a conductive member, which is located outside the capacitor pool housing and is used to be distributed in the inner cavity of the converter cabinet, and the conductive member is electrically connected to the capacitor terminal.

[0024] Optionally, the capacitor terminals of the capacitor are arranged outside the capacitor housing. When the entire capacitor terminals are located inside the capacitor cell housing, the closing member is a busbar, and the busbar and the capacitor terminals are electrically connected.

[0025] Optionally, the capacitor bank group further includes a support member, wherein the support member is disposed in an inner cavity of the capacitor bank housing, and the support member connects the capacitor bank frame and the closing member.

[0026] Optionally, the shell air inlet and the shell air outlet are distributed in sequence along the vertical direction or the horizontal direction.

[0027] Optionally, the capacitor pool heat dissipation structure also includes a fan assembly, which is used to drive air from the external environment of the converter cabinet to flow through the heat dissipation duct; wherein the fan assembly is located outside the capacitor pool housing, and the fan assembly is used to be set in the converter cabinet.

[0028] Optionally, the converter cabinet is provided with a cabinet air inlet and a cabinet air outlet, the cabinet air inlet is communicated with the shell air inlet, and the cabinet air outlet is communicated with the shell air outlet;

[0029] Wherein, the cabinet air inlet is opposite to and directly connected to the shell air inlet, or the cabinet air inlet is connected to the shell air inlet through a first air guide;

[0030] The cabinet air outlet is opposite to and directly connected to the shell air outlet, or the cabinet air outlet is connected to the shell air outlet via a second air guide.

[0031] Optionally, when the capacitor pool heat dissipation structure further includes a fan assembly:

[0032] The cabinet air inlet is connected to the shell air inlet via a first air guide, and the fan assembly is arranged between the cabinet air inlet and the first air guide; or, the cabinet air outlet is connected to the shell air outlet via a second air guide, and the fan assembly is arranged between the cabinet air outlet and the second air guide.

[0033] Based on the capacitor pool heat dissipation structure provided above, the present application also provides a converter, and the converter includes any of the capacitor pool heat dissipation structures described above.

[0034] The heat dissipation principle of the capacitor pool heat dissipation structure provided in this application is:

[0035] The air from the external environment of the converter cabinet enters the heat dissipation duct of the capacitor pool casing from the casing air inlet, and the air flows through the heat dissipation duct, that is, flows through the capacitor shell in the heat dissipation duct, thereby achieving heat dissipation of the capacitor shell. The air in the heat dissipation duct is discharged to the external environment of the converter cabinet through the casing air outlet.

[0036] It can be known from the above heat dissipation principle that the capacitor pool heat dissipation structure provided by the present application realizes the heat dissipation of the capacitor housing in the heat dissipation duct of the capacitor pool shell, that is, it realizes the air cooling of the capacitor, which effectively reduces the heat dissipation cost of the capacitor compared with water cooling; since the heat dissipation duct of the capacitor pool shell and the inner cavity of the converter cabinet are isolated from each other, the air flowing through the heat dissipation duct is prevented from flowing through the inner cavity of the converter cabinet, thereby preventing the air flowing through the heat dissipation duct from flowing through the components in the inner cavity of the converter cabinet, that is, the heat dissipation airflow (air flowing through the heat dissipation duct) and the components in the inner cavity of the converter cabinet are prevented from crossing, thereby preventing the heat dissipation airflow from affecting the components in the inner cavity of the converter cabinet, improving the protection performance of the converter, and reducing the protection cost of the converter. Therefore, the capacitor pool heat dissipation structure provided by the present application not only reduces the heat dissipation cost of the capacitor, but also reduces the high protection cost of the converter, thereby meeting the converter's demand for low cost and high protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0038] Figure 1 An axonometric diagram of the heat dissipation structure of the capacitor pool provided in Example 1 of the present application;

[0039] Figure 2 An axonometric view of the capacitor pool heat dissipation structure provided in Embodiment 1 of the present application from another direction;

[0040] Figure 3 An axonometric diagram of a capacitor pool group in a capacitor pool heat dissipation structure provided in Embodiment 1 of the present application;

[0041] Figure 4 An axonometric view of the capacitor pool group in the capacitor pool heat dissipation structure provided in the first embodiment of the present application from another direction;

[0042] Figure 5 An exploded view of a capacitor pool group in a capacitor pool heat dissipation structure provided in Example 1 of the present application;

[0043] Figure 6 A schematic diagram of a portion of the structure of a capacitor pool group in a capacitor pool heat dissipation structure provided in Example 1 of the present application;

[0044] Figure 7 A schematic diagram of the structure of a capacitor in a capacitor pool heat dissipation structure provided in Embodiment 1 of the present application;

[0045] Figure 8 A schematic diagram of air flow direction of a capacitor pool heat dissipation structure provided in Embodiment 1 of the present application;

[0046] Fig. 9 Another schematic diagram of air flow of the capacitor pool heat dissipation structure provided in Embodiment 1 of the present application;

[0047] Fig.10 Another schematic diagram of air flow of the capacitor pool heat dissipation structure provided in Embodiment 1 of the present application;

[0048] Fig.11 Another schematic diagram of air flow of the capacitor pool heat dissipation structure provided in Embodiment 1 of the present application;

[0049] Fig.12 Another schematic diagram of air flow of the capacitor pool heat dissipation structure provided in Embodiment 1 of the present application;

[0050] Fig.13 A front view of a structure of a capacitor pool heat dissipation structure provided in Embodiment 1 of the present application;

[0051] Fig.14 for Fig.13 AA section view;

[0052] Fig.15 for Fig.14 A partial enlarged view of

[0053] Fig.16 Another schematic diagram of the structure of the capacitor pool heat dissipation structure provided in the first embodiment of the present application;

[0054] Fig.17 Another schematic diagram of the structure of the capacitor pool heat dissipation structure provided in the second embodiment of the present application;

[0055] Fig.18 Another schematic diagram of the structure of the capacitor pool heat dissipation structure provided in the third embodiment of the present application;

[0056] Fig.19 A schematic diagram of a structure of a capacitor pool heat dissipation structure provided in Embodiment 4 of the present application;

[0057] Fig. 20 Another structural schematic diagram of the capacitor pool heat dissipation structure provided in Example 5 of the present application.

[0058] Description of reference numerals:

[0059] 1 is a capacitor bank, 2 is a second air guide, 3 is a fan assembly, 4 is a first air guide, 5 is a converter cabinet, 51 is a door panel, 511 is a cabinet air outlet, 512 is a cabinet air inlet, and 52 is a frame;

[0060] 11 is a capacitor pool housing, 111 is a capacitor pool frame, 1111 is a housing air outlet, 1112 is a housing air inlet, 112 is a closing member, 1121 is a sealing groove, 113 is a heat dissipation duct, 12 is a busbar, 13 is a capacitor, 131 is a capacitor terminal, 132 is a capacitor housing, 133 is a protrusion, 14 is a supporting member, and 15 is a sealing member. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limitations on the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context. It should also be understood that in the embodiments of the present application, "one or more" refers to one, two or more than two.

[0063] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0064] The multiple involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the words "first", "second", etc. are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0065] The "parallel" and "perpendicular" involved in the embodiments of the present application are "substantially parallel" and "substantially perpendicular" in actual operation. "Substantially parallel" can be understood as parallel with a certain error, and similarly, "substantially perpendicular" can be understood as perpendicular with a certain error.

[0066] like Figure 1 and Figure 2 As shown, the capacitor pool heat dissipation structure provided in the embodiment of the present application includes a capacitor pool group 1, and the capacitor pool group 1 is used to be arranged in the converter cabinet 5.

[0067] The specific structure of the converter cabinet 5 is selected according to actual conditions. Exemplarily, the converter cabinet 5 includes: a frame 52, a top plate, a bottom plate and four side plates all fixed to the frame 52, wherein one side plate is a door plate 51. The top plate, the bottom plate and the four side plates can all be referred to as cabinet plates of the converter cabinet 5. Of course, the converter cabinet 5 can also be selected to have other structures, which is not limited in this embodiment.

[0068] like Figure 3-Figure 6 As shown, the capacitor pool group 1 includes a capacitor pool housing 11 and a capacitor 13. In the capacitor pool housing 11, there may be one or more than two capacitors 13.

[0069] Combination Figure 1-Figure 6 As shown, the capacitor pool housing 11 is installed on the door panel 51 of the converter cabinet 5, and the cabinet air inlet 1112 and the cabinet air outlet 1111 are arranged on the door panel 51, so that the inner cavity of the capacitor pool housing 11 is connected to the external environment of the converter. Of course, the capacitor pool housing 11 can be installed at other positions of the converter cabinet 5, which is not limited in this embodiment.

[0070] like Figure 7 As shown, the capacitor 13 includes: a capacitor housing 132 and a capacitor terminal 131, and the capacitor terminal 131 is arranged outside the capacitor housing 132. There can be two capacitor terminals 131. In actual situations, the number of capacitor terminals 131 can also be selected to be other, and this embodiment does not limit this.

[0071] The capacitor terminal 131 is located at a first end of the capacitor housing 132 , and the second end of the capacitor housing 132 is far away from the capacitor terminal 131 . It can be understood that the first end and the second end of the capacitor housing 132 are the two ends of the capacitor housing 132 respectively.

[0072] like Figure 8-Figure 10 As shown, the capacitor pool housing 11 has a heat dissipation duct 113, and the heat dissipation duct 113 and the inner cavity of the converter cabinet 5 are isolated from each other; the capacitor housing 132 is at least partially located in the heat dissipation duct 113, and the capacitor pool housing 11 also has a housing air inlet 1112 and a housing air outlet 1111 both connected to the heat dissipation duct 113, and the housing air inlet 1112 and the housing air outlet 1111 are both used to communicate with the external environment of the converter cabinet 5.

[0073] It should be noted that the heat dissipation duct 113 and the inner cavity of the converter cabinet 5 are isolated from each other, which means that the air flowing through the heat dissipation duct 113 will not flow through the inner cavity of the converter cabinet 5. The housing air inlet 1112 and the housing air outlet 1111 can be different ports or the same port, depending on the actual situation. The housing air inlet 1112 can be one or more than two, and the housing air outlet 1111 can be one or more than two, also depending on the actual situation, and this embodiment does not limit this.

[0074] The specific positions of the housing air inlet 1112 and the housing air outlet 1111 on the capacitor cell housing 11 are selected according to actual conditions, and are not limited in this embodiment.

[0075] In order to facilitate the communication between the shell air inlet 1112 and the shell air outlet 1111 and the external environment of the converter cabinet 5, the converter cabinet 5 is provided with a cabinet air inlet 512 and a cabinet air outlet 511. It can be understood that the shell air inlet 1112 and the cabinet air inlet 512 are connected, and the cabinet air outlet 511 and the shell air outlet 1111 are connected.

[0076] The specific positions of the cabinet air inlet 512 and the cabinet air outlet 511 on the converter cabinet 5 are selected according to actual conditions. On the one hand, the cabinet air outlet 511 and the cabinet air inlet 512 can be set on the same cabinet board, such as the door board 51; on the other hand, the cabinet air outlet 511 and the cabinet air inlet 512 can also be set on different cabinet boards, for example, the cabinet air outlet 511 and the cabinet air inlet 512 are respectively set on two opposite cabinet boards, or the cabinet air outlet 511 and the cabinet air inlet 512 are respectively set on two adjacent cabinet boards.

[0077] The cabinet air inlet 512 and the shell air inlet 1112 can be connected directly or through other components such as the first air guide 4. Correspondingly, the cabinet air outlet 511 and the shell air outlet 1111 can be connected directly or through other components such as the second air guide 2, which is not limited in this embodiment.

[0078] In the above structure, the outer shell air inlet 1112 and the outer shell air outlet 1111 are both used to communicate with the external environment of the converter cabinet 5, so that the inner cavity of the capacitor pool outer shell 11 is used to allow air from the external environment of the converter cabinet 5 to flow through to dissipate heat for the capacitor 13 (the capacitor outer shell 132 located in the inner cavity of the capacitor pool outer shell 11).

[0079] In order to facilitate heat dissipation of the capacitor 13, on the one hand, a gap can be selected between two adjacent capacitors 13; on the other hand, a gap can be selected between the capacitor 13 close to the capacitor pool housing 11 and the inner wall of the capacitor pool housing 11 among all the capacitors 13. In this way, the gap forms a channel for air to flow through, thereby improving the heat dissipation effect. In actual situations, the above two aspects can be combined to maximize the ventilation volume and improve the heat dissipation effect.

[0080] The heat dissipation principle of the above capacitor pool heat dissipation structure is:

[0081] The air from the external environment of the converter cabinet 5 enters the heat dissipation duct 113 of the capacitor pool housing 11 from the housing air inlet 1112, and the air flows through the capacitor housing 132 in the heat dissipation duct 113, thereby dissipating the heat of the capacitor housing 132. The air in the heat dissipation duct 113 is discharged to the external environment of the converter cabinet 5 through the housing air outlet 1111.

[0082] It can be known from the above heat dissipation principle that the above capacitor pool heat dissipation structure realizes the heat dissipation of the capacitor housing 132 in the heat dissipation duct 113, that is, the air cooling heat dissipation of the capacitor 13 is realized, and compared with the water cooling heat dissipation, the heat dissipation cost of the capacitor 13 is effectively reduced; because the heat dissipation duct 113 of the capacitor pool housing 11 and the inner cavity of the converter cabinet 5 are isolated from each other, the air flowing through the heat dissipation duct 113 is prevented from flowing through the inner cavity of the converter cabinet 5, thereby preventing the air flowing through the heat dissipation duct 113 from flowing through the components in the inner cavity of the converter cabinet 5, that is, the heat dissipation airflow (air flowing through the heat dissipation duct 113) and the components in the inner cavity of the converter cabinet 5 are prevented from crossing, thereby preventing the heat dissipation airflow from affecting the components in the inner cavity of the converter cabinet 5, improving the protection performance of the converter, and reducing the high protection cost of the converter. Therefore, the above capacitor pool heat dissipation structure not only reduces the heat dissipation cost of the capacitor 13, but also reduces the high protection cost of the converter, thereby meeting the converter's demand for low cost and high protection.

[0083] In the above capacitor pool heat dissipation structure, the relative position relationship between the capacitor terminal 131 and the heat dissipation duct 113 is selected according to actual conditions. Fig. 20 As shown, the capacitor terminal 131 of the capacitor 13 may be at least partially located in the heat dissipation duct 113 .

[0084] In the above embodiment, one end where the capacitor terminal 131 is connected to the capacitor housing 132 is located inside the capacitor pool housing 11, and the other end of the capacitor terminal 131 is located outside the capacitor pool housing 11; or, the entire capacitor terminal 131 is located inside the capacitor pool housing 11.

[0085] In the above embodiment, the entire capacitor housing 132 can be selected to be located in the heat dissipation duct 113, which improves the heat dissipation efficiency and heat dissipation effect of the capacitor 13. However, since the capacitor terminal 131 needs to be electrically connected to other devices, the heat dissipation airflow flowing through the capacitor terminal 131 will affect the electrical connection between the capacitor terminal 131 and other devices, resulting in poor reliability of the electrical connection and poor protection performance.

[0086] In other embodiments, Figure 8-Figure 10 , Figure 12-Figure 19 As shown, in order to improve the protection performance and the reliability of the electrical connection, the entire capacitor terminal 131 can be selected to be located outside the heat dissipation duct 113.

[0087] On the one hand, if Figure 8-Figure 10 , Figure 12-16 and Fig.19 As shown, the capacitor terminal 131 can be selected to be at least partially located in the capacitor pool housing 11, and the entire capacitor housing 132 is located in the capacitor pool housing 11; or Fig.17As shown, one end of the capacitor terminal 131 connected to the capacitor housing 132 is embedded in the shell plate of the capacitor pool housing 11, and the entire capacitor housing 132 is located in the capacitor pool housing 11. In this case, the capacitor housing 132 and the capacitor pool housing 11 can be sealed and connected so that the capacitor terminal 131 is located outside the heat dissipation duct.

[0088] In the above structure, when the capacitor terminal 131 is at least partially located in the capacitor pool housing 11, it is possible to select a portion of the capacitor terminal 131 to be located in the capacitor pool housing 11, such as Figure 8-Figure 10 , Figure 12-16 Alternatively, the entire capacitor terminal 131 may be located within the capacitor housing 11, such as Fig.19 shown.

[0089] In the above structure, when one end where the capacitor terminal 131 and the capacitor housing 132 are connected is embedded in the shell plate of the capacitor pool housing 11, the one end where the capacitor terminal 131 and the capacitor housing 132 are connected can be flush with the inner wall of the capacitor pool housing 11, or the one end where the capacitor terminal 131 and the capacitor housing 132 are connected can be located between the inner wall and the outer wall of the capacitor pool housing 11.

[0090] In the above structure, the entire capacitor housing 132 is located in the heat dissipation duct 113 , or part of the capacitor housing 132 is located in the heat dissipation duct 113 .

[0091] In the above structure, the specific structure of the sealed connection between the capacitor housing 132 and the capacitor pool housing 11 is selected according to actual conditions, and this embodiment does not limit this.

[0092] On the other hand, Fig.18 As shown, the entire capacitor terminal 131 can be located outside the capacitor pool housing 11, and one end of the capacitor housing 132 provided with the capacitor terminal 131 extends outside the capacitor pool housing 11. In this case, the capacitor housing 132 and the capacitor pool housing 11 can be sealed and connected to relatively isolate the heat dissipation duct 113 from the inner cavity of the converter cabinet 5.

[0093] In the above structure, part of the capacitor housing 132 is located in the heat dissipation duct 113 .

[0094] In the above structure, the specific structure of the sealed connection between the capacitor housing 132 and the capacitor pool housing 11 is selected according to actual conditions, and this embodiment does not limit this.

[0095] In the above capacitor pool heat dissipation structure, the specific structure of the capacitor pool housing 11 is selected according to actual conditions. Figure 3-Figure 5As shown, the capacitor pool housing 11 includes a capacitor pool frame 111 and a closure member 112. The closure member 112 and the capacitor pool frame 111 are sealed and connected to achieve the closure member 112 enclosing the capacitor pool frame 111. The specific structures of the closure member 112 and the capacitor pool frame 111 are selected according to actual conditions, and this embodiment does not limit this.

[0096] In other embodiments, the capacitor pool housing 11 may also be selected to have other structures, which is not limited to this embodiment.

[0097] In order to facilitate the setting of the housing air inlet 1112 and the housing air outlet 1111, the housing air inlet 1112 and the housing air outlet 1111 can be selected to be set on the capacitor pool frame 111. Of course, at least one of the housing air inlet 1112 and the housing air outlet 1111 can also be selected to be set on the closure 112, which is not limited in this embodiment.

[0098] The shell air inlet 1112 and the shell air outlet 1111 can be arranged on the same plate of the capacitor cell shell 11; the shell air inlet 1112 and the shell air outlet 1111 can also be arranged on different plates of the capacitor cell shell 11, for example, the shell air inlet 1112 and the shell air outlet 1111 are respectively arranged on two opposite plates, or the shell air inlet 1112 and the shell air outlet 1111 are respectively arranged on two adjacent plates.

[0099] In the above embodiment, when the capacitor terminal 131 is at least partially located outside the capacitor cell housing 11, the capacitor terminal 131 or the capacitor housing 132 can be selected to pass through the closure 112; when the end at which the capacitor terminal 131 and the capacitor housing 132 are connected is embedded in the shell plate of the capacitor cell housing 11, the end at which the capacitor terminal 131 and the capacitor housing 132 are connected can be selected to be embedded in the closure 112, the end at which the capacitor terminal 131 and the capacitor housing 132 are connected can be flush with the inner side surface of the closure 112, or the end at which the capacitor terminal 131 and the capacitor housing 132 are connected can be located between the inner side surface and the outer side surface of the closure 112.

[0100] It should be noted that the inner side surface of the closing piece 112 is a part of the inner wall of the capacitor cell housing 11 , and the outer side surface of the closing piece 112 is a part of the outer wall of the capacitor cell housing 11 .

[0101] In the above embodiment, the capacitor terminal 131 needs to be electrically connected to other devices. To facilitate the electrical connection between the capacitor terminal 131 and other devices, the capacitor pool heat dissipation structure further includes a conductive member, which is electrically connected to the capacitor terminal 131.

[0102] When the capacitor terminal 131 is at least partially located outside the capacitor pool housing 11, the conductive member is located outside the capacitor pool housing 11 and is used to be distributed in the inner cavity of the converter cabinet 5, wherein the conductive member can be a cable, a busbar 12 or others, which is selected according to actual conditions and is not limited in this embodiment.

[0103] When the entire capacitor terminal 131 is located in the capacitor cell housing 11 , the sealing member 112 is a conductive member, the conductive member is a busbar 12 , and the busbar 12 and the capacitor terminal 131 are electrically connected.

[0104] In order to improve the stability of the capacitor housing 11, as Figure 5 , Figure 6 , Figure 8-Figure 10 As shown, the capacitor pool group 1 further includes a support member 14, which is disposed in the inner cavity of the capacitor pool housing 11, and the support member 14 connects the capacitor pool frame 111 and the closure member 112. In this way, the capacitor pool frame 111 and the closure member 112 are connected by the support member 14, thereby improving the stability of the entire capacitor pool housing 11.

[0105] In order to simplify the structure, the support member 14 may be selected as a support column. One end of the support column is connected to the capacitor cell frame 111 , and the other end of the support column is connected to the closing member 112 .

[0106] The support member 14 may also be other structures, such as a support frame, etc., and is not limited to a support column, and this embodiment does not limit this.

[0107] The number of the support member 14 may be one or more than two, depending on the actual situation. In order to improve the function of the support member 14, more than two support members 14 may be selected, and the support members 14 may be evenly distributed in the inner cavity of the capacitor cell housing 11. For example, Figure 5 and Figure 6 As shown, there are six support members 14 , and the support members 14 are distributed between the capacitors 13 .

[0108] In other embodiments, the support member 14 may not be provided, and the present invention is not limited thereto.

[0109] The air flow direction in the above capacitor pool heat dissipation structure is selected according to actual conditions.

[0110] In some embodiments, Figure 8-Figure 10 As shown, the housing air inlet 1112 and the housing air outlet 1111 are distributed along the vertical direction, and correspondingly, the cabinet air inlet 1112 and the cabinet air outlet 1111 are distributed in sequence along the vertical direction.

[0111] In some other embodiments, such as Fig.11 and Fig.12As shown, the shell air inlet 1112 and the shell air outlet 1111 are distributed in the horizontal direction, and correspondingly, the cabinet air inlet 1112 and the cabinet air outlet 1111 are distributed in sequence in the horizontal direction.

[0112] Of course, the housing air inlet 1112 and the housing air outlet 1111 may also be distributed along other directions and are not limited to the above embodiments.

[0113] In the above capacitor pool heat dissipation structure, in order to improve the heat dissipation efficiency, as Figure 1 , Figure 2 , Figure 8-Figure 10 As shown, the capacitor pool heat dissipation structure further includes a fan assembly 3 , and the fan assembly 3 is used to drive the air in the external environment of the converter cabinet 5 to flow through the heat dissipation duct 113 .

[0114] The fan assembly 3 includes at least one fan. The specific structure of the fan assembly 3 is selected according to actual conditions and is not limited in this embodiment.

[0115] The specific position of the fan assembly 3 is selected according to the actual situation. In order to facilitate the maintenance of the fan assembly 3, the fan assembly 3 is located outside the capacitor pool housing 11. In order to ensure the service life of the fan assembly 3, the fan assembly 3 is used to be arranged in the converter cabinet 5. Of course, the fan assembly 3 can also be selected to be arranged in other positions, which is not limited in this embodiment.

[0116] The fan assembly 3 may be located near the cabinet air inlet 512 or the cabinet air outlet 511 , depending on actual conditions, and this embodiment does not limit this.

[0117] In order to more clearly illustrate the capacitor pool heat dissipation structure provided in the embodiments of the present application, five specific embodiments are provided below.

[0118] Embodiment 1

[0119] Figure 1-Figure 16 The specific structure of the capacitor pool heat dissipation structure provided in the first embodiment is shown.

[0120] like Figure 1 and Figure 2 As shown, the capacitor pool heat dissipation structure provided in the first embodiment of the present application includes: a capacitor pool group 1, a first air guide member 4, a fan assembly 3 and a second air guide member 2.

[0121] In the first embodiment, the capacitor bank group 1 is arranged in the converter cabinet 5, and the capacitor bank group 1 is arranged on the door panel 51 of the converter cabinet 5. The cabinet air outlet 511 and the cabinet air inlet 512 are both arranged on the door panel 51.

[0122] like Figure 3-Figure 6As shown, the capacitor bank group 1 includes: a capacitor bank housing 11 , a busbar 12 , a capacitor 13 , a support member 14 and a sealing member 15 .

[0123] The capacitor cell housing 11 comprises a capacitor cell frame 111 and a closing piece 112 . The closing piece 112 and the capacitor cell frame 111 are sealed and connected to achieve the closing piece 112 closing the capacitor cell frame 111 .

[0124] The capacitor housing 132 of the capacitor 13 is located in the capacitor pool housing 11, one end of the capacitor terminal 131 of the capacitor 13 connected to the capacitor housing 132 is located in the capacitor pool housing 11, and the other end of the capacitor terminal 131 is located outside the capacitor pool housing 11 and electrically connected to the busbar 12, and the busbar 12 is located outside the capacitor pool housing 11. The capacitor terminal 131 passes through the sealing member 112.

[0125] The capacitor pool housing 11 has a heat dissipation duct 113, a housing air inlet 1112 and a housing air outlet 1111, and the housing air inlet 1112 and the housing air outlet 1111 are both connected to the heat dissipation duct 113; wherein the heat dissipation duct 113 and the inner cavity of the converter cabinet 5 are isolated from each other.

[0126] like Figure 8-Figure 10 , Figure 12-16 As shown, the entire capacitor housing 132 is located in the heat dissipation duct 113 , and the end surface of the capacitor terminal 131 provided in the capacitor housing 132 is sealedly connected to the closure member 112 so that the entire capacitor terminal 131 is located outside the heat dissipation duct 113 .

[0127] In order to facilitate the sealed connection between the capacitor housing 132 and the sealing member 112 , the end surface of the capacitor housing 132 where the capacitor terminal 131 is provided and the sealing member 112 are sealed by the sealing member 15 .

[0128] On the one hand, if Figure 5 , Figure 8-Figure 10 , Fig.12 As shown, the entire surface of the end surface of the capacitor terminal 131 is provided in the capacitor housing 132 and is sealed and connected to the closure member 112. In this case, the sealing member 15 can be selected as a sealing ring, which is sleeved on the periphery of all the capacitor terminals 131, and the sealing ring corresponds to the capacitor 13 one by one. In actual situations, the sealing member 15 can also be selected as other structures, such as a sealing rubber layer.

[0129] On the other hand, Figure 13-Figure 16As shown, the end surface of the capacitor housing 132 in which the capacitor terminal 131 is provided has a protrusion 133, and the protrusion 133 is sealed and connected to the closure member 112. Optionally, the protrusion 133 is an annular protrusion, and the protrusion 133 corresponds to the capacitor housing 132 one by one; in each capacitor 13, the protrusion 133 is located at the periphery of all capacitor terminals 131, and the protrusion 133 is sealed and connected to the closure member 112 through the sealing member 15. In this case, the sealing member 15 is covered on the protrusion 133. Exemplarily, the cross section of the sealing member 15 is U-shaped, and the cross section is parallel to the height direction of the capacitor 13 (the distribution direction of the capacitor terminal 131 and the capacitor housing 132).

[0130] In order to improve the sealing effect, Fig.15 As shown, the sealing member 112 is provided with a sealing groove 1121, the sealing member 15 is located in the sealing groove 1121, and the protrusion 133 extends into the sealing groove 1121. Of course, the sealing member 112 may also be provided without the sealing groove 1121. Fig.16 shown.

[0131] In the above structure, the protrusion 133 may also be replaced by a plurality of bumps, and all the bumps are distributed around the periphery of all the capacitor terminals 131 , which is not limited to the above embodiment.

[0132] In the first embodiment, the sealing member 15 may also be other structures, such as a sealing rubber layer, which is not limited in the present embodiment.

[0133] In the capacitor cell housing 11 , the support member 14 connects the capacitor cell frame 111 and the closing member 112 , thereby improving the structural stability.

[0134] like Figure 8As shown, the housing air inlet 1112 and the housing air outlet 1111 are distributed in the vertical direction, and correspondingly, the cabinet air inlet 1112 and the cabinet air outlet 1111 are distributed in sequence in the vertical direction; the cabinet air inlet 1112 and the cabinet air outlet 1111 are both arranged on the door panel 51, and the housing air inlet 1112 and the housing air outlet 1111 are both arranged on the capacitor pool frame 111, so that the axis of the cabinet air inlet 512 is perpendicular to the axis of the housing air inlet 1112, and the axis of the cabinet air outlet 511 is perpendicular to the axis of the housing air outlet 1111. In this case, in order to facilitate the communication between the cabinet air inlet 512 and the housing air inlet 1112, the cabinet air inlet 512 and the housing air inlet 1112 are communicated through the first air guide 4. Accordingly, in order to facilitate the communication between the cabinet air outlet 511 and the shell air outlet 1111, the cabinet air outlet 511 and the shell air outlet 1111 can be selected to be communicated with each other through the second air guide 2. The fan assembly 3 is connected with the cabinet air outlet 511 and the second air guide 2. In this way, the air of the external environment of the converter cabinet 5 flows through the cabinet air inlet 512, the first air guide 4, the shell air inlet 1112, the heat dissipation duct 113, the shell air outlet 1111, the second air guide 2, the fan assembly 3 and the cabinet air outlet 511 in sequence.

[0135] The position of the housing air inlet 1112 can be adjusted. Fig. 9 As shown, the housing air inlet 1112 is located on the side of the capacitor pool frame 111 close to the door panel 51. In this case, the axis of the cabinet air inlet 512 and the axis of the housing air inlet 1112 can be selected to be parallel or colinear, and the cabinet air inlet 512 and the housing air inlet 1112 can be directly connected, and the first air guide 4 does not need to be provided.

[0136] In actual situations, the position of the shell air outlet 1111 can be adjusted, or the cabinet air outlet 511 and the shell air outlet 1111 can be directly connected. In this case, when the cabinet air outlet 511 and the shell air outlet 1111 are directly connected, the axis of the cabinet air outlet 511 and the axis of the shell air outlet 1111 can be selected to be parallel or colinear. In order to facilitate the direct connection between the cabinet air outlet 511 and the shell air outlet 1111, the cabinet panel of the shell air outlet 1111 facing the converter cabinet 5 and the cabinet panel where the cabinet air outlet 511 is located can be selected to be the same cabinet panel, for example, the same cabinet panel is the door panel 51.

[0137] When the housing air inlet 1112 and the housing air outlet 1111 are distributed in the vertical direction, it can be selected Figure 8 and Fig. 9 The cabinet air outlet 511 and the cabinet air inlet 512 are both arranged on the door panel 51. Fig.10 The cabinet air outlet 511 and the cabinet air inlet 512 are shown to be arranged on different panels of the converter cabinet 5 .

[0138] In actual situations, the relative positions of the cabinet air outlet 511 and the cabinet air inlet 512, as well as the relative positions of the outer shell air inlet 1112 and the outer shell air outlet 1111 can be met by adjusting the guide direction of at least one of the first air guide 4 and the second air guide 2.

[0139] like Fig.11 and Fig.12 As shown, when the shell air inlet 1112 and the shell air outlet 1111 are distributed in the horizontal direction, and the cabinet air inlet 1112 and the cabinet air outlet 1111 are distributed in sequence in the horizontal direction, the shell air inlet 1112 and the shell air outlet 1111 can be selected to be located at two opposite plates of the capacitor cell shell 11, and the cabinet air inlet 1112 and the cabinet air outlet 1111 can be located at two opposite cabinet plates of the converter cabinet 5.

[0140] In order to simplify the structure of the first air guide member 4 and the second air guide member 2, the axis of the shell air inlet 1112, the axis of the shell air outlet 1111, the axis of the cabinet air inlet 1112, and the axis of the cabinet air outlet 1111 can be selected to be parallel or colinear with each other.

[0141] like Fig.11 As shown, the fan assembly 3 is disposed between the cabinet air inlet 512 and the housing air inlet 1112, and the fan assembly 3 is connected to the cabinet air inlet 512 and the housing air inlet 1112; or Fig.12 As shown, the fan assembly 3 is arranged at the cabinet air outlet 511, and the fan assembly 3 is connected to the cabinet air outlet 511 and the second air guide 2. In actual situations, the fan assembly 3 can also be arranged at other positions, which is not limited in this embodiment.

[0142] The first air guide member 4 may not be provided along the horizontal direction between the air inlet 1112 and the air outlet 1111 of the housing, and the second air guide member 2 may not be provided. Fig.11 and Fig.12 The structure shown.

[0143] For other structures in the first embodiment and the technical effects of the first embodiment, please refer to the above text and will not be described in detail here.

[0144] Embodiment 2

[0145] Fig.17 The specific structure of the capacitor pool heat dissipation structure provided in the second embodiment is shown.

[0146] The capacitor pool heat dissipation structure provided in the second embodiment is different from the first embodiment mainly in that one end where the capacitor terminal 131 and the capacitor housing 132 are connected is embedded in the sealing member 112, and the capacitor terminal 131 and the inner side surface of the sealing member 112 are flush. Of course, the capacitor terminal 131 can also be selected between the inner side surface and the outer side surface of the sealing member 112.

[0147] In the second embodiment, the capacitor housing 132 is provided with an end surface of the capacitor terminal 131 and is sealed with the sealing member 112. The sealing method in the first embodiment can be used for sealing, or other sealing methods can be selected. Fig.17 As shown, the end surface of the capacitor housing 132 provided with the capacitor terminal 131 and the sealing member 112 can be selected to be in contact and sealed. For example, the capacitor housing 132 and the sealing member 112 are abutted against each other by snapping, thereby achieving contact and sealing.

[0148] Fig.17 In the structure shown, there is no need to provide a seal 15, which simplifies the entire structure and also simplifies the assembly of the entire structure.

[0149] For other structures in the second embodiment and the technical effects of the second embodiment, please refer to the previous text and will not be described in detail here.

[0150] Embodiment 3

[0151] Fig.18 The specific structure of the capacitor pool heat dissipation structure provided in the third embodiment is shown.

[0152] The heat dissipation structure of the capacitor pool provided in the third embodiment is different from that in the first embodiment mainly in that a portion of the capacitor housing 132 is located in the inner cavity (heat dissipation duct 113) of the capacitor pool housing 11, and another portion of the capacitor housing 132 is located outside the inner cavity of the capacitor pool housing 11. In this case, the entire capacitor terminal 131 is located outside the inner cavity of the capacitor pool housing 11, that is, the entire capacitor terminal 131 is located outside the heat dissipation duct 113.

[0153] In the third embodiment, the capacitor housing 132 passes through the sealing member 112, and the capacitor housing 132 and the sealing member 112 are sealed. It can be understood that the sealing member 112 has a through hole for the capacitor housing 132 to extend out. In order to facilitate the sealed connection, the circumferential side wall of the capacitor housing 132 is sealed to the capacitor cell housing 11.

[0154] The capacitor housing 132 and the closure member 112 are sealed and connected by a sealing member 15. Exemplarily, the sealing member 15 is a sealing ring, which is sleeved on the capacitor housing 132, and the sealing ring seals and connects the inner wall of the through hole and the capacitor housing 132.

[0155] In the third embodiment, the sealing member 15 may also be selected to have other structures, which is not limited in the present embodiment.

[0156] In the third embodiment, the capacitor housing 132 passes through the sealing member 112 , which simplifies the structure of the sealing member 112 and the assembly of the capacitor 13 and the sealing member 112 , compared with the case where the capacitor terminal 131 passes through the sealing member 112 .

[0157] For other structures in the third embodiment and the technical effects of the third embodiment, please refer to the previous text and will not be described in detail here.

[0158] Embodiment 4

[0159] Fig.19 The specific structure of the capacitor pool heat dissipation structure provided in the fourth embodiment is shown.

[0160] The capacitor pool heat dissipation structure provided in the fourth embodiment is different from that in the first embodiment mainly in that the entire capacitor housing 132 and the entire capacitor terminal 131 are both located in the capacitor pool housing 11 .

[0161] In order to ensure that the entire capacitor terminal 131 is located outside the heat dissipation duct 113, the capacitor housing 132 and the sealing member 112 are sealed and connected. For the specific manner of the sealed connection, reference may be made to the first embodiment, which will not be described in detail here.

[0162] In the fourth embodiment, the sealing member 112 is a conductive member to ensure that the capacitor terminal 131 is electrically connected to other devices. Specifically, the conductive member is a busbar 12. It can be understood that the sealing member 112 is the busbar 12, and in this case, the busbar 12 is a part of the capacitor cell housing 11.

[0163] In order to reduce the busbar 12, the capacitor pool frame 111 may be provided with an opening, a mounting plate may be provided at the opening of the capacitor pool frame 111, the busbar 12 may be overlapped on the mounting plate, and the busbar 12 and the mounting plate may be sealed and connected. Of course, the inner wall of the opening may also be sealed and connected to the busbar 12, which is not limited in this embodiment.

[0164] In the fourth embodiment, the busbar 12 is used as a part of the capacitor bank housing 11 , so that no sealing member is required, thereby simplifying the structure of the capacitor bank group 1 .

[0165] For other structures in the fourth embodiment and the technical effects of the fourth embodiment, please refer to the previous text and will not be described in detail here.

[0166] Embodiment 5

[0167] Fig. 20 The specific structure of the capacitor pool heat dissipation structure provided in the fifth embodiment is shown.

[0168] The main difference between the capacitor pool heat dissipation structure provided in the fifth embodiment and the fourth embodiment is that the entire capacitor terminal 131 is located in the heat dissipation duct 113 .

[0169] In the fifth embodiment, in the capacitor bank group 1 , only the sealing member 112 (busbar 12 ) and the capacitor bank frame 111 need to be sealed and connected, which simplifies the structure of the capacitor bank group 1 and also simplifies the assembly of the capacitor bank group 1 .

[0170] For other structures in the fifth embodiment and the technical effects of the fifth embodiment, please refer to the previous text and will not be described in detail here.

[0171] The capacitor pool heat dissipation structures provided in the above five embodiments are only illustrative and are not limited to the above five embodiments.

[0172] Based on the capacitor pool heat dissipation structure provided in the above embodiment, an embodiment of the present application further provides a converter, which includes the capacitor pool heat dissipation structure described in the above embodiment.

[0173] Since the capacitor pool heat dissipation structure provided in the above embodiment has the above technical effect, the above converter includes the capacitor pool heat dissipation structure provided in the above embodiment, and the above converter also has the corresponding technical effect, which will not be repeated here.

[0174] The type of the above converter is selected according to actual conditions, and this embodiment does not limit this.

[0175] The above converter can be applied to a wind turbine generator set or a photovoltaic power generation device, which is not limited in this embodiment.

[0176] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A capacitor pool heat dissipation structure, characterized in that: include: A capacitor bank group used to be arranged in a converter cabinet, the capacitor bank group comprising a capacitor bank housing and a capacitor; Wherein, a heat dissipation duct is provided in the capacitor pool housing, and the heat dissipation duct and the inner cavity of the converter cabinet are isolated from each other; The capacitor housing of the capacitor is at least partially located in the heat dissipation duct, and the capacitor pool housing also has a housing air inlet and a housing air outlet both connected to the heat dissipation duct, and the housing air inlet and the housing air outlet are both used to communicate with the external environment of the converter cabinet.

2. The capacitor pool heat dissipation structure according to claim 1, characterized in that: The capacitor terminal of the capacitor is arranged outside the capacitor housing, and the entire capacitor terminal is located outside the heat dissipation duct.

3. The capacitor pool heat dissipation structure according to claim 2, characterized in that: The capacitor terminal is at least partially located in the capacitor cell housing, or one end of the capacitor terminal connected to the capacitor housing is embedded in the shell plate of the capacitor cell housing; The entire capacitor housing is located inside the capacitor pool housing, and the capacitor housing and the capacitor pool housing are sealed and connected.

4. The capacitor pool heat dissipation structure according to claim 3, characterized in that: The end surface of the capacitor terminal provided in the capacitor housing is sealed and connected to the capacitor pool housing.

5. The capacitor pool heat dissipation structure according to claim 4, characterized in that: The end surface of the capacitor housing on which the capacitor terminals are arranged is sealed and connected to the capacitor cell housing via a seal; or, the end surface of the capacitor housing on which the capacitor terminals are arranged is in contact and sealed with the capacitor cell housing.

6. The capacitor pool heat dissipation structure according to claim 4, characterized in that: The entire end surface of the capacitor housing on which the capacitor terminal is disposed is sealed and connected to the capacitor pool housing; or, the end surface of the capacitor housing on which the capacitor terminal is disposed has a protrusion, and the protrusion is sealed and connected to the capacitor pool housing.

7. The capacitor pool heat dissipation structure according to claim 2, characterized in that: The entire capacitor terminal is located outside the capacitor pool housing, one end of the capacitor terminal provided in the capacitor housing extends outside the capacitor pool housing, and the capacitor housing and the capacitor pool housing are sealed and connected.

8. The capacitor pool heat dissipation structure according to claim 7, characterized in that: The circumferential side wall of the capacitor housing is sealed and connected to the capacitor pool housing.

9. The capacitor pool heat dissipation structure according to claim 1, characterized in that: The capacitor terminal of the capacitor is arranged outside the capacitor housing, and at least a part of the capacitor terminal is located in the heat dissipation duct.

10. The capacitor pool heat dissipation structure according to claim 1, characterized in that: The capacitor pool housing comprises a capacitor pool frame and a closing piece, wherein the closing piece closes the capacitor pool frame, and the housing air inlet and housing air outlet are both arranged on the capacitor pool frame.

11. The capacitor pool heat dissipation structure according to claim 10, characterized in that: The capacitor terminal of the capacitor is arranged outside the capacitor housing. When the capacitor terminal is at least partially located outside the capacitor cell housing, the capacitor terminal or the capacitor housing passes through the sealing member.

12. The capacitor pool heat dissipation structure according to claim 11, characterized in that: It also includes a conductive member, which is located outside the capacitor pool housing and is used to be distributed in the inner cavity of the converter cabinet, and the conductive member is electrically connected to the capacitor terminal.

13. The capacitor pool heat dissipation structure according to claim 10, characterized in that: The capacitor terminals of the capacitor are arranged outside the capacitor housing. When the entire capacitor terminals are located inside the capacitor cell housing, the sealing member is a busbar, and the busbar is electrically connected to the capacitor terminals.

14. The capacitor pool heat dissipation structure according to claim 10, characterized in that: The capacitor bank group further includes a support member, which is disposed in the inner cavity of the capacitor bank housing and connects the capacitor bank frame and the closing member.

15. The capacitor pool heat dissipation structure according to claim 1, characterized in that: The shell air inlet and the shell air outlet are distributed in sequence along the vertical direction or the horizontal direction.

16. The capacitor pool heat dissipation structure according to claim 1, characterized in that: It also includes a fan assembly, which is used to drive air from the external environment of the converter cabinet to flow through the heat dissipation duct; wherein the fan assembly is located outside the capacitor pool housing, and the fan assembly is used to be arranged in the converter cabinet.

17. The capacitor pool heat dissipation structure according to any one of claims 1 to 16, characterized in that: The converter cabinet is provided with a cabinet air inlet and a cabinet air outlet, the cabinet air inlet is connected to the shell air inlet, and the cabinet air outlet is connected to the shell air outlet; Wherein, the cabinet air inlet is opposite to and directly connected to the shell air inlet, or the cabinet air inlet is connected to the shell air inlet through a first air guide; The cabinet air outlet is opposite to and directly connected to the shell air outlet, or the cabinet air outlet is connected to the shell air outlet via a second air guide.

18. The capacitor pool heat dissipation structure according to claim 17, characterized in that: When the capacitor pool heat dissipation structure further includes a fan assembly: The cabinet air inlet is connected to the shell air inlet via a first air guide, and the fan assembly is arranged between the cabinet air inlet and the first air guide; or, the cabinet air outlet is connected to the shell air outlet via a second air guide, and the fan assembly is arranged between the cabinet air outlet and the second air guide.

19. A converter, characterized in that: It comprises a capacitor pool heat dissipation structure as described in any one of claims 1-18.

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