CN112739131B - Electrical tray assembly and converter - Google Patents

Abstract

The invention discloses an electric tray assembly and a converter, wherein the electric tray assembly is used for the converter and comprises: a base unit; the tray unit is connected with the base unit in a sliding manner; and a plurality of electric element units arranged on the tray unit, wherein the electric element units are electrically connected into a strong electric circuit. According to the electric tray assembly provided by the embodiment of the invention, the problems of inconvenient operation, time and labor waste caused by limited internal space of the converter cabinet body when the electric element unit is directly assembled in the converter cabinet body are solved, the electromagnetic interference between a strong current circuit and a weak current circuit in the converter is relieved, and the reliability and the safety of the operation of electric equipment are improved.

Description

Electrical tray assemblies and converters

technical field

The invention relates to the field of converters, in particular to an electrical tray assembly and a converter.

Background technique

With the rapid development of the wind power industry, the current wind power converters are becoming more and more integrated and integrated, which further increases the requirements for the layout and maintenance of the electrical components of the converter. The layout of the existing electrical components of the converter often encounters the problems of rationality and maintainability.

In the actual layout of circuits with different voltage levels in the cabinet, the layout of strong and weak current devices will be unreasonable, and the outgoing lines of strong and weak current routing paths will cross each other. Each circuit will be interfered by electromagnetic compatibility (EMC), which will affect the reliability and safety of electrical equipment operation.

Contents of the invention

The invention provides an electric tray assembly and a converter, which alleviates the problem of electromagnetic interference between a strong current circuit and a weak current circuit in the converter.

In one aspect, the present invention provides an electrical tray assembly for a converter, comprising: a base unit; a tray unit including a base plate, the base plate is slidably connected to the base unit along a first direction; and a plurality of electrical component units , set on the tray unit, a plurality of electrical component units are electrically connected as a strong electric circuit, a plurality of electrical component units include a resistance unit and a voltage detection unit, the resistance unit and the voltage detection unit are arranged on the bottom plate, and the voltage detection unit is located on the resistance unit On both sides in the second direction, the second direction crosses the first direction.

According to an aspect of the embodiment of the present invention, the tray unit further includes: a first side plate, the first side plate is erected at one end of the bottom plate along the first direction, and the plurality of electrical component units further includes: a switch component unit and a wiring unit, the switch The element unit and the wiring unit are arranged on the first side plate, wherein the wiring unit is located on both sides of the switching element unit in the second direction.

According to an aspect of an embodiment of the present invention, the resistor unit includes: a first resistor subunit and a second resistor subunit, and the first resistor subunit and the second resistor subunit are arranged at intervals in a direction perpendicular to the bottom plate.

According to an aspect of the embodiment of the present invention, the resistance unit further includes: a resistance bracket, including a bearing part and a support part, the bearing part and the base plate are arranged at intervals in a direction perpendicular to the base plate, and the support part connects the bearing part to the base plate, and the first resistor The subunit is arranged on the bottom plate, and the second resistance subunit is arranged on the carrying part.

According to an aspect of the embodiment of the present invention, the switching element unit includes a first contactor, a second contactor and a fuse, one of the first resistor subunit and the second resistor subunit is a charging resistor unit, and the other is a discharging resistor unit, the charging resistance unit is electrically connected with the first contactor and the voltage detection unit to form a charging circuit, and the discharge resistance unit is electrically connected with the second contactor, the fuse and the voltage detection unit to form a discharge circuit.

According to an aspect of an embodiment of the present invention, the first side plate is provided with a component installation guide rail and a wire harness installation panel, the wire harness installation panel is located on both sides of the component installation guide rail in the second direction, and the component installation guide rails are arranged on the first side plate. One side surface of the resistance unit, and extending along the first direction, the component installation guide rail can fix at least part of the electrical components of the switch component unit, the wiring harness installation panel includes a plurality of wiring holes, the wiring unit includes a plurality of wiring harness interfaces, and the wiring harness interface can be connected with the wiring hole connection.

According to an aspect of the embodiments of the present invention, the wire harness interface includes at least one of a D-sub interface, a terminal block, or a wire harness connector.

According to an aspect of the embodiment of the present invention, the first side plate is further provided with a first wire slot and a wire passing hole, the first wire slot is arranged on the same side as the component installation guide rail and extends in the same direction, and the first wire slot is located on the side of the component installation guide rail. On the side away from the bottom plate, the first wire groove can accommodate the wires, and the wire hole is located on the side of the component mounting guide rail close to the bottom plate, and the wire hole allows the wire to pass through; the bottom plate is provided with a second wire groove, and the second wire groove is provided on each The voltage detection unit is along two sides of the second direction.

According to an aspect of the embodiment of the present invention, at least one end of the first side plate in the second direction is provided with a locking portion, and the locking portion can lock the tray unit and the base unit when the tray unit is stored in the base unit.

According to an aspect of the embodiment of the present invention, the voltage detection unit includes: a voltage detection base, including a bottom connection part and a side connection part, the bottom connection part is connected to the bottom plate, and the side connection part is erected on the bottom connection part; a plurality of voltage detection modules , a plurality of voltage detection modules are respectively connected to the side connection part and arranged at intervals from each other.

According to an aspect of the embodiment of the present invention, in each voltage detection base, the side connection parts are provided in pairs at both ends of the bottom connection part in the second direction, each side connection part extends along the first direction, and each side connection part A slot is provided, and the extension direction of the slot intersects with the bottom plate. The end of the slot away from the bottom plate has a notch, and the voltage detection module is inserted into the slot through the notch. The voltage detection unit also includes: a limit piece, connected to The end of the side connecting portion away from the bottom plate makes the notch closed.

According to an aspect of the embodiment of the present invention, the base unit includes a plurality of second side panels, each second side panel is arranged perpendicular to the bottom panel, and the plurality of second side panels surround each other, wherein at least one pair of second side panels is arranged along the first It extends in one direction and has a guide part that can be slidably connected with the bottom plate. The guide part extends along the first direction. The bottom plate and/or at least one second side plate are provided with a plurality of cooling holes.

On the other hand, an embodiment of the present invention provides a converter, which includes: a cabinet body with an accommodating space; The cabinet body is fixed, and the tray unit of the electrical tray assembly can be stored on the base unit by sliding relative to the base unit.

The electrical tray assembly provided according to the embodiment of the present invention is used for a converter, wherein a plurality of electrical component units can be carried on the tray unit, and a modularized electrical tray assembly is obtained, so that some electrical component units in the converter can be used in the converter. The exterior of the converter cabinet is pre-assembled on the tray unit, and then the whole is slidably connected to the base unit with the tray unit, so that this part of the electrical component unit is loaded into the converter cabinet, which solves the problem of directly assembling in the converter cabinet When the electrical component unit is used, the operation is inconvenient, time-consuming and labor-intensive due to the limited internal space of the cabinet. When the electrical pallet assembly is applied to the converter of the wind power generating set, the modularized electrical pallet assembly greatly saves the maintenance time and labor cost of the wind generating set.

According to the electrical tray assembly provided by the embodiment of the present invention, multiple electrical component units on the tray unit are electrically connected to form a high-voltage circuit, so that the high-voltage electrical components in the converter are integrated into the tray unit and connected with the power supply in the converter. The separation of weak current electrical components optimizes the layout of electrical components in the converter, reduces or even avoids the intersection of strong current wiring and weak current wiring paths, thereby alleviating electromagnetic interference between strong current circuits and weak current circuits in the converter, Improve the reliability and safety of electrical equipment operation.

According to the electrical tray assembly provided by the embodiment of the present invention, the plurality of electrical component units include a resistance unit and a voltage detection unit, wherein the voltage detection unit is located on both sides of the resistance unit in the second direction, ensuring that the circuit between the resistance unit and the voltage detection unit While the interconnection is convenient, the space occupation of the resistance unit and the voltage detection unit is smaller, the space utilization rate of the electrical tray assembly is improved, and a more reasonable layout of the electrical component units in the electrical tray assembly is realized.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

Figure 1 shows a perspective view of an electrical tray assembly according to an embodiment of the present invention;

Figure 2 shows a top view of an electrical tray assembly according to an embodiment of the invention;

Figure 3 shows a perspective view of an electrical tray assembly according to an embodiment of the present invention;

Figure 4 shows a front view of an electrical tray assembly according to an embodiment of the invention;

Figure 5 shows a top view of an electrical tray assembly according to an embodiment of the invention;

Fig. 6 shows a three-dimensional exploded view of the electrical component unit of the connecting part of the tray unit in the electrical tray assembly according to an embodiment of the present invention;

Fig. 7 shows the front view of the electrical component unit of the tray unit connection part in the electrical tray assembly according to an embodiment of the present invention;

8 shows a perspective view of a resistance unit in an electrical tray assembly according to an embodiment of the present invention;

9a and 9b show perspective views of an example wire harness interface in an electrical tray assembly according to an embodiment of the present invention;

Fig. 10 shows a perspective view of another example wire harness interface in the electrical tray assembly according to an embodiment of the present invention;

Fig. 11 shows an exploded perspective view of a voltage detection unit in an electrical tray assembly according to an embodiment of the present invention;

Figure 12 shows a perspective view of a base unit in an electrical tray assembly according to an embodiment of the present invention;

Fig. 13 shows a perspective view of a converter according to an embodiment of the present invention.

In the picture:

1000-converter;

100 - electrical tray assembly;

110-base unit; 111-second side plate; 111a-guiding part;

120-tray unit; 121-bottom plate; 122-first side plate; 121a-second wire slot; 122a-component installation guide rail; 122b-wiring harness installation panel; 122c-first wire slot; tight part; 123-wire harness fixing structure;

130-resistance unit; 131-first resistance subunit; 132-second resistance subunit; 133-resistance bracket; 133a-carrying part; 133b-supporting part; 134-terminal;

140-voltage detection unit; 141-voltage detection base; 141a-bottom connection; 141b-side connection; GR1-slot; GK1-notch; 142-voltage detection module; 143-limiting piece;

150-switching element unit; 151-first contactor; 152-second contactor; 153-fuse;

160-wiring unit; 161-harness interface; 161a-D-sub interface female; 161b-D-sub interface male; 161c-connector male; 161d-connector female; 161e-connector male connector; 161f-connector female base;

170-slot unit;

H1-wiring hole; H2-cooling hole;

X-first direction; Y-second direction;

200-cabinet.

Detailed ways

The characteristics and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only configured to explain the present invention, not to limit the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the statement "comprising..." does not exclude the presence of additional same elements in the process, method, article or device comprising said element.

In the related art, there are usually two ways to install the electrical components in the converter cabinet: one is to install the electrical components directly and independently in the cabinet, and then use wires to connect the prefabricated electrical components inside the cabinet with other electrical components. Electrical connection; the other is to assemble multiple electrical components on a separate mounting board, then install the mounting board as a whole in the cabinet, and then use wires to electrically connect with other electrical components inside the cabinet.

The operation of these two installation methods is often limited to the operating space in the cabinet, and the operator completes the wiring in the cabinet, and the operation process is complicated and time-consuming. At the same time, when maintenance and disassembly are taken into consideration, other components must be disassembled first due to the sequence of operation procedures, resulting in increased maintenance difficulty and more labor costs. Especially for offshore wind power, the maintenance time at sea is limited, and the maintenance cost is expensive.

In order to solve the above problems, an embodiment of the present invention provides an electrical tray assembly and a converter, wherein the electrical tray assembly is used in the converter, and the embodiments of the air tray assembly and the converter will be described below with reference to the accompanying drawings .

An embodiment of the present invention provides an electrical tray assembly. FIG. 1 and FIG. 2 respectively show a perspective view and a top view of an electrical tray assembly according to an embodiment of the present invention. The electrical tray assembly 100 of this embodiment includes a base unit 110, a tray unit 120 and Multiple electrical component units. The base unit 110 is used for fixing with the cabinet of the converter. The tray unit 120 is slidably connected to the base unit 110 . A plurality of electrical component units are arranged on the tray unit 120, and the plurality of electrical component units are electrically connected to form a high-voltage circuit.

According to the electrical tray assembly 100 provided by the embodiment of the present invention, the tray unit 120 can carry a plurality of electrical component units, and a modularized electrical tray assembly 100 is obtained, so that some electrical component units in the converter can be placed in the converter cabinet The outside of the body is pre-assembled on the tray unit 120, and then slidably connected to the base unit 110 with the tray unit 120 as a whole, so that this part of the electrical component unit is loaded into the converter cabinet, which solves the problem of directly assembling in the converter cabinet When the electrical component unit is used, the operation is inconvenient, time-consuming and labor-intensive due to the limited internal space of the cabinet. When the electrical tray assembly 100 is applied to a converter of a wind power generating set, the modularized electrical tray assembly 100 greatly saves maintenance time and labor costs of the wind generating set.

According to the electrical tray assembly 100 provided by the embodiment of the present invention, the multiple electrical component units on the tray unit 120 are electrically connected as a high-voltage circuit, so that the high-voltage electrical components in the converter are integrated into the tray unit 120 and connected with the converter. The weak current electrical components in the converter are separated, the layout of the electrical components in the converter is optimized, and the crossing of the strong current wiring and the weak current wiring paths is reduced or even avoided, thereby alleviating the tension between the strong current circuit and the weak current circuit in the converter. Electromagnetic interference, improve the reliability and safety of electrical equipment operation.

3 , 4 , and 5 respectively show a perspective view, a front view, and a top view of an electrical tray assembly according to an embodiment of the present invention. 6 and 7 show the perspective exploded view and front view of the electrical component unit of the tray unit connection part in the electrical tray assembly according to the embodiment of the present invention, wherein FIG. 6 shows a partial structure of the resistance unit 130 in exploded view.

In some embodiments, the tray unit 120 includes a bottom plate 121 , and the bottom plate 121 is slidably connected to the base unit 110 along the first direction X. In some embodiments, the tray unit 120 further includes a first side plate 122 erected on one end of the bottom plate 121 along the first direction X. As shown in FIG.

As shown in FIG. 1 and FIG. 2 , in some embodiments, the plurality of electrical component units include a resistor unit 130 and a voltage detection unit 140 . The resistance unit 130 and the voltage detection unit 140 are disposed on the base plate 121 , wherein the voltage detection unit 140 is located on two sides of the resistance unit 130 in a second direction Y, which crosses the first direction X. In some embodiments, the second direction Y is perpendicular to the first direction X.

According to the electrical tray assembly provided by the embodiment of the present invention, the voltage detection unit 140 is located on both sides of the resistance unit 130 in the second direction Y, which ensures the convenience of interconnection between the resistance unit 130 and the voltage detection unit 140, and makes the resistance The space occupied by the unit 130 and the voltage detection unit 140 is smaller, which improves the space utilization rate of the electrical tray assembly and realizes a more reasonable layout of the electrical component units in the electrical tray assembly.

As shown in FIG. 1 , FIG. 2 and FIG. 6 , in some embodiments, the plurality of electrical component units further include a switch component unit 150 and a wiring unit 160 . The switch element unit 150 includes a plurality of switch elements, and the switch elements are used for on-off control of the connected circuit. The switching element unit 150 and the wiring unit 160 are disposed on the first side plate 122 , wherein the wiring unit 160 is located on both sides of the switching element unit 150 in the second direction Y.

FIG. 8 shows a perspective view of a resistor unit in an electrical tray assembly according to an embodiment of the present invention. Please refer to FIG. 6 and FIG. 8 at the same time. In some embodiments, the resistor unit 130 includes a first resistor subunit 131 and a second resistor subunit 132. The first resistor sub-unit 131 and the second resistor sub-unit 132 are arranged at intervals in a direction perpendicular to the bottom plate 121 . One of the first resistor subunit 131 and the second resistor subunit 132 is a charging resistor unit, and the other is a discharging resistor unit.

In this embodiment, the first resistor subunit 131 is used as a discharge resistor unit, and the second resistor subunit 132 is used as a charging resistor unit for illustration. The discharge resistor unit includes more than two discharge resistor modules arranged in an array, and the charge resistor unit It includes more than two charging resistor modules arranged in an array.

In some embodiments, the resistor unit 130 further includes a resistor bracket 133 . The resistance bracket 133 includes a carrying portion 133 a and a supporting portion 133 b, and the carrying portion 133 a is spaced apart from the bottom plate 121 in a direction perpendicular to the bottom plate 121 . The supporting portion 133b connects the carrying portion 133a to the bottom plate 121 , and the first resistor sub-unit 131 is disposed on the bottom plate 121 , specifically, the first resistor sub-unit 131 is located between the carrying portion 133a and the bottom plate 121 . The second resistor sub-unit 132 is disposed on the carrying portion 133 a , specifically, the second resistance sub-unit 132 is disposed on a surface of the carrying portion 133 a away from the bottom plate 121 .

In this embodiment, the supporting parts 133b are arranged in pairs at both ends of the carrying part 133a in the second direction Y, so that the resistance bracket 133 is roughly in a U-shaped structure. In some embodiments, a plurality of cooling holes H2 may be provided on the support portion 133b.

In some embodiments, the resistance unit 130 further includes a connection terminal 134 disposed on the bearing portion 133 a of the resistance support 133 for electrically connecting the resistance unit 130 to other electrical component units.

Please refer to FIG. 6 and FIG. 7 , in some embodiments, the switching element unit 150 includes a first contactor 151 , a second contactor 152 and a fuse 153 . The number of the first contactor 151 , the second contactor 152 and the fuses 153 can be set as required.

One of the first resistor subunit 131 and the second resistor subunit 132 is a charging resistor unit, and the other is a discharging resistor unit. Wherein, the charging resistance unit is electrically connected with the first contactor 151 and the voltage detection unit 140 to form a charging circuit, and the discharge resistance unit is electrically connected with the second contactor 152 , the fuse 153 and the voltage detection unit 140 to form a discharge circuit.

In some embodiments, the charging circuit is connected across the upstream and downstream of the grid-side main circuit breaker of the converter, and the charging circuit is formed by closing the charging contactor before the main circuit breaker is closed. It plays the role of uncontrolled rectification, the charging resistance unit is used to suppress the charging current, and the pre-charging circuit is AC 690V.

In some embodiments, the discharge circuit is connected across the DC busbar of the converter, and the discharge circuit is used to consume the energy stored on the DC bus when the converter fails or is shut down for maintenance, so as to ensure the safety of maintenance personnel. The discharge circuit DC plus or minus 600V.

The embodiment of the present invention modularly integrates the charging circuit and the discharging circuit (the charging circuit and the discharging circuit can be two circuits each) and the voltage detection circuit, and integrates the AC 690V circuit and the DC positive and negative 600V circuit in the converter on the electrical tray In the component 100, the voltage levels in the converter cabinet are clearly distinguished, the interference between strong and weak currents is optimized, the EMC anti-interference ability is improved as a whole, and maintenance and inspection are facilitated.

Referring to FIGS. 3 to 5 , in some embodiments, the first side plate 122 is provided with a component mounting rail 122a and a wire harness mounting panel 122b , and the wire harness mounting panel 122b is located on both sides of the component mounting rail 122a in the second direction Y.

The component mounting guide rail 122a is disposed on the side surface of the first side plate 122 away from the resistance unit 130 and extends along the first direction X. The component mounting guide rail 122a can fix at least some electrical components of the switch component unit 150 . In this embodiment, the first contactor 151 , the second contactor 152 and the fuse 153 of the switching element unit 150 are fixed on the element mounting rail 122 a.

The harness installation panel 122b includes a plurality of wiring holes H1. The wiring unit 160 includes a plurality of wiring harness interfaces 161, and the wiring harness interfaces 161 can be connected to the wiring hole H1.

In some embodiments, the wire harness interface 161 includes at least one of a D-sub interface, a terminal block, or a wire harness connector.

Fig. 9a and Fig. 9b show a perspective view of an example wire harness interface in the electrical tray assembly according to an embodiment of the present invention, and the wire harness interface 161 is a D-sub interface. Wherein, the D-sub interface includes a female D-sub interface 161a and a male D-sub interface 161b. The D-sub interface male head 161b is provided with pins and fastening screws, and the D-sub interface female head 161a is provided with jacks corresponding to the pins of the D-sub interface male head 161b and connections corresponding to the fastening screws hole.

Fig. 9a shows the state when the D-sub interface female head 161a and the D-sub interface male head 161b are not connected, and Fig. 9a shows the state when the D-sub interface female head 161a and the D-sub interface male head 161b are connected. In the actual installation process, the D-sub interface male 161b and the D-sub interface female 161a are installed together in the wiring hole H1 of the wiring harness installation panel 122b, and the pins of the D-sub interface male 161b are inserted into the D-sub interface female The electrical connection between the D-sub interface male 161b and the D-sub interface female 161a is implemented in the jack of 161a. Then fasten the fastening screw of the male D-sub interface 161b to the connection hole of the female D-sub interface 161a to complete the installation.

During the entire product life cycle, if the entire tray unit 120 needs to be disassembled and taken out of the converter cabinet during maintenance, you only need to loosen the fastening screw of the D-sub interface male 161b, and then pull out the D-sub interface The male head 161b, the interface disconnects the electrical connection between the electrical components in the electrical tray assembly 100 and other components in the cabinet, so that the entire tray unit 120 can be slid out to the outside of the converter cabinet for maintenance.

FIG. 10 shows a perspective view of another example of a wire harness interface in an electrical tray assembly according to an embodiment of the present invention. The wire harness interface 161 is a wire harness connector. The harness connector includes a male connector 161c, a female connector 161d, a male connector 161e, and a female connector base 161f. The female connector 161d is fixed to the wiring harness installation panel 122b through the female connector base 161f, wherein the female connector 161d is located in the wiring hole H1. The wire harness is electrically connected to the connector male 161c through the connector male fitting 161e. When in use, the male connector 161c is inserted into the female connector 161d, so that the pins of the male connector 161c are inserted into the corresponding sockets on the female connector 161d to realize the electrical connection between the two. The female connector 161d is provided with a plurality of connection terminals, and the plurality of connection terminals can be respectively electrically connected with a plurality of electrical component units in the electrical tray assembly 100 .

Please refer to FIG. 3 to FIG. 7 , in some embodiments, the first side plate 122 is further provided with a first wire slot 122c and a wire passing hole 122d. The first wire groove 122c is arranged on the same side as the component installation guide rail 122a and extends in the same direction. The first wire groove 122c is located on the side of the component installation guide rail 122a away from the bottom plate 121. The first wire groove 122c can accommodate wires, and the wire passing hole 122d is located at On one side of the component mounting guide rail 122a close to the bottom plate 121, the wire passing hole 122d allows the wire to pass through.

In some embodiments, the base plate 121 is provided with a second wire groove 121a, and the second wire groove 121a is disposed on both sides of each voltage detection unit 140 along the second direction Y.

In some embodiments, the tray unit 120 further includes a wire harness fixing structure 123 for fixing at least part of the wire harnesses of the wiring unit 160 . In some embodiments, the wire harness fixing structure 123 is a wire-binding beam, which is connected to the bottom plate 121 and whose position corresponds to the wire harness installation panel 122b.

In some embodiments, at least one end of the first side plate 122 in the second direction Y is provided with a locking portion 122e, and the locking portion 122e can connect the tray unit 120 to the base when the tray unit 120 is stored in the base unit 110. Unit 110 is locked. In some embodiments, after the tray unit 120 is stored in the base unit 110 , the locking portion 122 e of the tray unit 120 can be locked and connected to the base unit 110 through bolts or other connecting parts, so as to avoid unnecessary displacement of the tray unit 120 .

FIG. 11 shows an exploded perspective view of a voltage detection unit in an electrical tray assembly according to an embodiment of the present invention. In some embodiments, the voltage detection unit 140 includes a voltage detection base 141 and a plurality of voltage detection modules 142 .

The voltage detection base 141 includes a bottom connecting portion 141a and a side connecting portion 141b. The bottom connecting portion 141a is connected to the bottom plate 121, and the side connecting portion 141b is erected on the bottom connecting portion 141a. A plurality of voltage detection modules 142 are respectively connected to the side connection portion 141b and arranged at intervals from each other. The voltage detection module 142 has two opposite surfaces, at least one of which is provided with a voltage sensor.

In some embodiments, in each voltage detection base 141, the side connection parts 141b are arranged in pairs at both ends of the bottom connection part 141a in the second direction Y, and each side connection part 141b extends along the first direction X, so that the voltage The detection base 141 is roughly U-shaped. Each side connection part 141b is provided with a slot GR1, the extension direction of the slot GR1 intersects with the base plate 121, the end of the slot GR1 away from the base plate 121 has a notch GK1, and the voltage detection module 142 is inserted into the slot through the notch GK1 within GR1.

In some embodiments, the voltage detection unit 140 further includes a limiting member 143 connected to an end of the side connecting portion 141 b away from the bottom plate 121 , so that the notch GK1 is closed. In some embodiments, the limiting member 143 is a strip-shaped limiting plate extending along the first direction X.

When the voltage detection unit 140 is assembled, the voltage detection module 142 can be inserted into the slot GR1 through the notch GK1, and then the stopper 143 is connected to the side connection part 141b of the pressure detection base 141, and the voltage detection unit can be completed. 140 assembly, its operation is simple and easy to maintain.

Fig. 12 shows a perspective view of a base unit in an electrical tray assembly according to an embodiment of the present invention. In some embodiments, the base unit 110 includes a plurality of second side panels 111, and each second side panel 111 is arranged perpendicular to the bottom panel 121, A plurality of second side plates 111 surround each other, at least one pair of second side plates 111 extends along the first direction X, and has a guide portion 111a that is slidably connected to the bottom plate 121 , and the guide portion 111a extends along the first direction X.

In some embodiments, the bottom plate 121 and/or at least one second side plate 111 is provided with a plurality of heat dissipation holes H2, which facilitates the heat dissipation of the devices in each electrical component unit, and ensures that the components of the overall modularized electrical tray assembly 100 Working under the allowable ambient temperature prolongs the service life of components.

In some embodiments, the electrical tray assembly 100 further includes a wire slot unit 170, and the wire slot unit 170 is arranged on one of the second side plates 111, and the position of the second side plate 111 provided with the wire slot unit 170 is the same as that of the tray unit 120. The position of the first side plate 121 corresponds to that of . At least part of the wiring harnesses of the wiring unit 160 pass through the wiring slot unit 170 .

According to the electrical tray assembly 100 provided in the embodiment of the present invention, the structure of the electrical tray assembly 100 is basically in a symmetrical form, the layout and wiring path are reasonable, and the installation is simple and easy to operate. All internal wiring of the electrical tray assembly 100 can be preset outside the current transformer cabinet in advance. When the modular electrical tray assembly 100 with internal wiring pre-set is put into the electric control cabinet as a whole, only the wiring unit 160 including multiple wiring harness interfaces 161 can be plugged in to complete the electrical connection of the wiring of the entire charging and discharging circuit. The operation is simple, which prevents the operator from completing the wiring work in the limited cabinet space, and at the same time saves labor input costs.

When the charging and discharging circuit components of the electrical tray assembly 100 need to be maintained and disassembled, it is only necessary to unplug the multiple wire harness interfaces 161 of the wiring unit 160, slide the tray unit 120 to separate from the chassis unit 110, and then complete the components outside the converter cabinet The replacement of the wires and the recovery of the wires greatly save the maintenance time and labor costs of wind power.

The embodiment of the present invention also provides a converter, such as a converter in a wind power generating set.

Fig. 13 shows a perspective view of a converter according to an embodiment of the present invention. The converter 1000 includes a cabinet body 200 and the electrical tray assembly 100 of any example above. The cabinet body 200 has an accommodation space, the base unit 110 of the electrical tray assembly 100 is located in the accommodation space, and is fixed with the cabinet body 200 , the tray unit 120 of the electrical tray assembly 100 can be stored on the base unit 110 by sliding relative to the base unit 110 .

According to the converter provided by the embodiment of the present invention, the tray unit 120 of the electrical tray assembly 100 can carry a plurality of electrical component units, and a modularized electrical tray assembly 100 is obtained, so that some electrical component units in the converter can be The exterior of the converter cabinet is pre-assembled on the tray unit 120, and then the whole is slidably connected to the base unit 110 with the tray unit 120, so that this part of the electrical component unit is loaded into the converter cabinet 200, which solves the problem of direct When assembling the electrical component units in the converter cabinet 200 , the operation is inconvenient, time-consuming and labor-intensive due to the limited internal space of the cabinet 200 . When the converter is a converter of a wind power generating set, the modular electrical tray assembly 100 greatly saves the maintenance time and labor cost of the wind generating set, especially reduces the maintenance time and cost of the offshore wind generating set.

A plurality of electrical component units on the tray unit 120 of the electrical tray assembly 100 are electrically connected as a high-voltage circuit, so that the high-voltage electrical components in the converter are integrated into the tray unit 120 and separated from the weak-current electrical components in the converter , optimize the layout of electrical components in the converter, reduce or even avoid the crossing of strong current wiring and weak current wiring paths, thereby alleviating the electromagnetic interference between the strong current circuit and the weak current circuit in the converter, and improving the operation of electrical equipment reliability and safety.

In some embodiments, the electrical component units include a resistor unit 130 and a voltage detection unit 140 . The resistance unit 130 and the voltage detection unit 140 are disposed on the base plate 121 , wherein the voltage detection unit 140 is located on two sides of the resistance unit 130 in a second direction Y, which crosses the first direction X. In some embodiments, the second direction Y is perpendicular to the first direction X. According to the above structure, while ensuring the convenience of circuit interconnection between the resistance unit 130 and the voltage detection unit 140, the space occupied by the resistance unit 130 and the voltage detection unit 140 is smaller, the space utilization rate of the electrical tray assembly is improved, and the electrical tray assembly is realized. More rational layout of electrical component units in assemblies.

According to the embodiments of the present invention described above, these embodiments do not describe all details in detail, nor do they limit the invention to only the specific embodiments described. Obviously many modifications and variations are possible in light of the above description. This description selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and its modification on the basis of the present invention. The invention is to be limited only by the claims, along with their full scope and equivalents.

Claims (11)

1. An electrical tray assembly (100) for a converter, characterized in that it comprises: base unit (110); A tray unit (120), the tray unit (120) comprising a bottom plate (121), the bottom plate (121) being slidably connected to the base unit (110) along a first direction (X); and A plurality of electrical component units are arranged on the tray unit (120), and the plurality of electrical component units are electrically connected as a strong electric circuit, and the plurality of electrical component units include a resistance unit (130) and a voltage detection unit (140 ), the resistance unit (130) and the voltage detection unit (140) are arranged on the base plate (121), wherein the voltage detection unit (140) is located at the resistance unit (130) in the second direction ( on both sides of Y), said second direction (Y) intersects said first direction (X), Wherein, the resistance unit (130) includes: The first resistance subunit (131), the second resistance subunit (132) and the resistance bracket (133), the resistance bracket (133) includes a bearing portion (133a) and a support portion (133b), and the bearing portion (133a) and The bottom plate (121) is arranged at intervals in a direction perpendicular to the bottom plate (121), the support portion (133b) connects the bearing portion (133a) to the bottom plate (121), and the first resistor The subunit (131) is arranged on the bottom plate (121), the second resistor subunit (132) is arranged on the bearing part (133a), the first resistor subunit (131) and the second resistor The subunits (132) are arranged at intervals in the direction perpendicular to the bottom plate (121); one of the first resistance subunit (131) and the second resistance subunit (132) is a charging resistance unit, and the other One is a discharge resistance unit, the charge resistance unit is electrically connected to the voltage detection unit (140) to form an AC charging circuit, and the discharge resistance unit is electrically connected to the other voltage detection unit (140) to form a DC discharge circuit. 2. The electrical tray assembly (100) according to claim 1, characterized in that, the tray unit (120) further comprises: a first side plate (122), the first side plate (122) is erected at one end of the bottom plate (121) along the first direction (X), The plurality of electrical component units also includes: The switch element unit (150) and the wiring unit (160), the switch element unit (150) and the wiring unit (160) are arranged on the first side plate (122), wherein the wiring unit (160) Located on both sides of the switching element unit (150) in the second direction (Y). 3. The electrical tray assembly (100) according to claim 2, characterized in that, the switching element unit (150) comprises a first contactor (151), a second contactor (152) and a fuse (153) , The charging resistance unit is electrically connected to the first contactor (151) and the voltage detection unit (140) to form a charging circuit, and the discharging resistance unit is connected to the second contactor (152) and the fuse (153). The voltage detection unit (140) is electrically connected as a discharge circuit. 4. The electrical tray assembly (100) according to claim 2, characterized in that, the first side plate (122) is provided with a component mounting guide rail (122a) and a wiring harness mounting panel (122b), and the wiring harness mounting panel (122b) are located on both sides of the component mounting guide rail (122a) in the second direction (Y), The component installation guide rail (122a) is arranged on the side surface of the first side plate (122) away from the resistance unit (130), and extends along the first direction (X), the component installation guide rail (122a) capable of fixing at least some electrical components of said switching element unit (150), The wiring harness installation panel (122b) includes a plurality of wiring holes (H1), The wiring unit (160) includes a plurality of wiring harness interfaces (161), and the wiring harness interfaces (161) can be connected to the wiring hole (H1). 5. The electrical tray assembly (100) according to claim 4, characterized in that, the wire harness interface (161) comprises at least one of a D-sub interface, a wiring terminal, or a wire harness connector. 6. The electrical tray assembly (100) according to claim 4, characterized in that, the first side plate (122) is further provided with a first wire groove (122c) and a wire hole (122d), The first wire slot (122c) is arranged on the same side as the component installation guide rail (122a) and extends in the same direction, and the first wire slot (122c) is located on the side of the component installation guide rail (122a) away from the bottom plate ( 121), the first groove (122c) can accommodate wires, The wire passing hole (122d) is located on the side of the component mounting guide rail (122a) close to the bottom plate (121), and the wire passing hole (122d) allows wires to pass through; The bottom plate (121) is provided with a second wire slot (121a), and the second wire slot (121a) is arranged on both sides of each of the voltage detection units (140) along the second direction (Y). 7. The electrical tray assembly (100) according to claim 2, characterized in that, at least one end of the first side plate (122) in the second direction (Y) is provided with a locking portion (122e) The locking part (122e) can lock the tray unit (120) and the base unit (110) in a state where the tray unit (120) is accommodated in the base unit (110). 8. The electrical tray assembly (100) according to claim 1, characterized in that the voltage detection unit (140) comprises: The voltage detection base (141) includes a bottom connection part (141a) and a side connection part (141b), the bottom connection part (141a) is connected to the bottom plate (121), and the side connection part (141b) is erected on on the bottom connecting portion (141a); A plurality of voltage detection modules (142), the plurality of voltage detection modules (142) are respectively connected to the side connection part (141b) and arranged at intervals from each other. 9. The electrical tray assembly (100) according to claim 8, characterized in that, in each of the voltage detection bases (141), the side connection parts (141b) are arranged in pairs on the bottom connection part ( 141a) at both ends of the second direction (Y), each of the side connecting parts (141b) extends along the first direction (X), and each of the side connecting parts (141b) is provided with a slot (GR1), the extension direction of the slot (GR1) intersects with the bottom plate (121), the slot (GR1) has a notch (GK1) at the end far away from the bottom plate (121), the voltage The detection module (142) is inserted into the slot (GR1) through the notch (GK1), The voltage detection unit (140) also includes: The limiter (143) is connected to an end of the side connecting portion (141b) away from the bottom plate (121), so that the notch (GK1) is closed. 10. The electrical tray assembly (100) according to claim 1, characterized in that, the base unit (110) comprises a plurality of second side panels (111), and each of the second side panels (111) is vertical Set on the bottom plate (121), a plurality of the second side plates (111) surround each other, wherein at least one pair of the second side plates (111) extends along the first direction (X), and has a guide part (111a) capable of being slidably connected to the bottom plate (121), the guide part (111a) extending along the first direction (X), The bottom plate (121) and/or at least one of the second side plates (111) are provided with a plurality of cooling holes. 11. A converter, characterized in that it comprises: a cabinet body having a receiving space; and According to the electrical tray assembly (100) according to any one of claims 1 to 10, the base unit (110) of the electrical tray assembly (100) is located in the accommodating space and fixed to the cabinet body, the The tray unit (120) of the electrical tray assembly (100) can be stored on the base unit (110) by sliding relative to the base unit (110).

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