CN112739131B - Electrical tray assembly and converter - Google Patents
Electrical tray assembly and converter Download PDFInfo
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- CN112739131B CN112739131B CN201911031760.8A CN201911031760A CN112739131B CN 112739131 B CN112739131 B CN 112739131B CN 201911031760 A CN201911031760 A CN 201911031760A CN 112739131 B CN112739131 B CN 112739131B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
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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
Technical Field
The invention relates to the field of converters, in particular to an electrical tray assembly and a converter.
Background
With the rapid development of the wind power industry, the wind power converter is more and more integrated at present, so that the requirements on the layout and maintenance of electric elements of the converter are further improved. The existing converter electric elements often encounter the problems of arrangement rationality and maintainability during layout.
In the actual layout of the circuits with different voltage levels in the cabinet body, unreasonable layout of strong and weak current devices can occur, and outgoing lines of strong and weak current routing paths are crossed. The circuits may be interfered by electromagnetic compatibility (EMC), which may affect the reliability and safety of the operation of the electrical equipment.
Disclosure of Invention
The invention provides an electric tray assembly and a converter, which can be used for relieving 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 pallet assembly for a current transformer, comprising: a base unit; the tray unit comprises a bottom plate which is connected to the base unit in a sliding mode along a first direction; and the plurality of electric element units are arranged on the tray unit and electrically connected into a strong current circuit, each electric element unit comprises a resistance unit and a voltage detection unit, the resistance units and the voltage detection units are arranged on the bottom plate, the voltage detection units are positioned on two sides of the resistance units in a second direction, and the second direction is crossed with the first direction.
According to an aspect of an embodiment of the present invention, the tray unit further includes: the first curb plate, the one end of bottom plate edge first direction is found to first curb plate, and a plurality of electric elements unit still include: the switch element unit and the wiring unit are arranged on the first side plate, and the wiring unit is located on two sides of the switch element unit in the second direction.
According to an aspect of an embodiment of the present invention, a resistance unit includes: the first resistor subunit and the second resistor subunit are arranged at intervals in a direction perpendicular to the base plate.
According to an aspect of an embodiment of the present invention, the resistance unit further includes: the resistor support comprises a bearing part and a supporting part, the bearing part and the bottom plate are arranged at intervals in the direction perpendicular to the bottom plate, the supporting part connects the bearing part and the bottom plate, the first resistor subunit is arranged on the bottom plate, and the second resistor subunit is arranged on the bearing part.
According to an aspect of the embodiments 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, the other is a discharging resistor unit, the charging resistor unit is electrically connected to the first contactor and the voltage detection unit to form a charging circuit, and the discharging resistor unit is electrically connected to the second contactor, the fuse, and the voltage detection unit to form a discharging circuit.
According to an aspect of the embodiment of the present invention, the first side plate is provided with an element mounting rail and a harness mounting panel, the harness mounting panel is located on both sides of the element mounting rail in the second direction, the element mounting rail is provided on a side surface of the first side plate facing away from the resistance unit and extends in the first direction, the element mounting rail is capable of fixing at least part of the electrical elements of the switch element unit, the harness mounting panel includes a plurality of wiring holes, the wiring unit includes a plurality of harness interfaces, and the harness interfaces are capable of being connected to the wiring holes.
According to one aspect of an embodiment of the present invention, the harness interface includes at least one of a D-sub interface, a wire terminal, or a harness connector.
According to one aspect of the embodiment of the invention, the first side plate is further provided with a first wire groove and a wire passing hole, the first wire groove and the component mounting guide rail are arranged on the same side and extend in the same direction, the first wire groove is positioned on one side of the component mounting guide rail far away from the bottom plate, the first wire groove can accommodate a wire, the wire passing hole is positioned on one side of the component mounting guide rail close to the bottom plate, and the wire passing hole allows the wire to pass through; the bottom plate is provided with a second wire groove, and the second wire grooves are formed in two sides of each voltage detection unit along 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 capable of locking the tray unit with the base unit in a state where the tray unit is received in the base unit.
According to an aspect of an embodiment of the present invention, a voltage detection unit includes: the voltage detection base comprises a bottom connecting part and a side connecting part, the bottom connecting part is connected with the bottom plate, and the side connecting part is vertically arranged on the bottom connecting part; and a plurality of voltage detection modules respectively connected with the side connection parts and arranged at intervals from each other.
According to an aspect of the embodiments of the present invention, in each voltage detection base, the side connection portions are disposed at two ends of the bottom connection portion in the second direction in pairs, each side connection portion extends along the first direction, each side connection portion is provided with a slot, the extending direction of the slot intersects with the bottom plate, one end of the slot, which is far away from the bottom plate, is provided with a notch, the voltage detection module is inserted into the slot through the notch, and the voltage detection unit further includes: and the limiting part is connected to one end of the side connecting part, which is far away from the bottom plate, so that the notch is closed.
According to an aspect of the embodiments of the present invention, the base unit includes a plurality of second side plates, each of the second side plates is disposed perpendicular to the bottom plate, the plurality of second side plates mutually enclose each other, wherein at least one pair of the second side plates extends along the first direction and has a guide portion capable of slidably connecting with the bottom plate, the guide portion extends along the first direction, and the bottom plate and/or at least one of the second side plates is provided with a plurality of heat dissipation holes.
In another aspect, an embodiment of the present invention provides a converter, which includes: a cabinet having an accommodating space; and according to the electric tray subassembly of any one of the above-mentioned embodiments, the base unit of the electric tray subassembly is located in the accommodation space and fixed with the cabinet body, and the tray unit of the electric tray subassembly can be accommodated on the base unit by sliding relative to the base unit.
According to the electric tray assembly provided by the embodiment of the invention, the tray unit can bear a plurality of electric element units, so that a modularized electric tray assembly is obtained, part of electric element units in the converter can be pre-assembled on the tray unit outside the converter cabinet body, and then the whole electric element units are connected to the base unit along with the tray unit in a sliding manner, so that the part of electric element units are installed in the converter cabinet body, and the problems of inconvenience in operation, time waste and labor waste caused by limited internal space of the cabinet body when the electric element units are directly assembled in the converter cabinet body are solved. When the electrical tray assembly is applied to a converter of the wind generating set, the modularized electrical tray 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 invention, the plurality of electrical element units on the tray unit are electrically connected into the strong current circuit, so that the strong current electrical elements in the converter are integrated in the tray unit and separated from the weak current electrical elements in the converter, the layout of the electrical elements in the converter is optimized, the mutual intersection of strong current wiring and weak current wiring paths is reduced or even avoided, the electromagnetic interference between the strong current circuit and the weak current circuit in the converter is relieved, and the reliability and the safety of the operation of electrical equipment are improved.
According to the electric tray assembly provided by the embodiment of the invention, the plurality of electric element units comprise the resistance units and the voltage detection units, wherein the voltage detection units are positioned on the two sides of the resistance units in the second direction, so that the space occupation of the resistance units and the voltage detection units is smaller while the convenience of line interconnection between the resistance units and the voltage detection units is ensured, the space utilization rate of the electric tray assembly is improved, and the more reasonable layout of the electric element units in the electric tray assembly is realized.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings, in which like or similar reference characters refer to like or similar parts throughout the several views.
Fig. 1 illustrates a perspective view of an electrical tray assembly according to an embodiment of the present invention;
FIG. 2 illustrates a top view of an electrical tray assembly according to an embodiment of the present invention;
FIG. 3 illustrates a perspective view of an electrical tray assembly according to an embodiment of the present invention;
FIG. 4 illustrates a front view of an electrical tray assembly according to an embodiment of the present invention;
FIG. 5 illustrates a top view of an electrical tray assembly according to an embodiment of the present invention;
fig. 6 is an exploded perspective view of a tray unit connection part electrical component unit in an electrical tray assembly according to an embodiment of the present invention;
fig. 7 illustrates a front view of a tray unit connection part electrical component unit in an electrical tray assembly according to an embodiment of the present invention;
FIG. 8 illustrates a perspective view of a resistor unit in an electrical tray assembly according to an embodiment of the present invention;
FIGS. 9a and 9b illustrate perspective views of an exemplary wire harness interface in an electrical tray assembly according to embodiments of the present invention;
FIG. 10 illustrates a perspective view of a wire harness interface of another example of an electrical tray assembly in accordance with an embodiment of the present invention;
FIG. 11 illustrates an exploded perspective view of a voltage detection unit in an electrical tray assembly according to an embodiment of the present invention;
FIG. 12 illustrates 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 current transformer according to an embodiment of the invention.
In the figure:
1000-a current transformer;
100-an electrical tray assembly;
110-a base unit; 111-a second side panel; 111 a-a guide;
120-a tray unit; 121-a bottom plate; 122-a first side panel; 121 a-a second wire chase; 122 a-component mounting rails; 122 b-harness mounting panel; 122c — a first wire chase; 122 d-line passing hole; 122 e-a locking portion; 123-a harness fixing structure;
130-a resistance unit; 131-a first resistor subunit; 132-a second resistive subunit; 133-a resistive support; 133 a-a carrier; 133 b-a support; 134-connecting terminal;
140-a voltage detection unit; 141-voltage detection base; 141 a-bottom connection; 141 b-side connection; GR 1-slot; GK 1-notch; 142-a voltage detection module; 143-a stopper;
150-switching element unit; 151-a first contactor; 152-a second contactor; 153-fuses;
160-a wiring unit; 161-harness interface; a 161a-D-sub interface female head; a 161b-D-sub interface male head; 161 c-connector male; 161 d-connector female; 161 e-connector male connector; 161 f-connector female base;
170-a wire slot unit;
h1-wiring holes; h2-heat dissipation holes;
x-a first direction; y-a second direction;
200-cabinet body.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the 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 merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In the related art, there are two general ways for installing the electrical components in the converter cabinet: one is that each electric element is directly and independently arranged in the cabinet body, and then the electric element prefabricated in the cabinet body is electrically connected with other electric elements by using a lead; the other is to assemble a plurality of electrical components on a single mounting plate, then integrally mount the mounting plate in the cabinet body, and then electrically connect the mounting plate with other electrical components arranged in the cabinet body by using wires.
Often can confine to the operating space in the cabinet during operation of these two kinds of mounting methods, operating personnel accomplishes the wiring in the cabinet body, and operation process is complicated and time-consuming. Meanwhile, when maintenance and disassembly are considered, other devices are disassembled firstly due to the sequence of operation procedures, so that the maintenance difficulty is increased and more labor cost is invested. Especially for offshore wind power, the offshore maintenance time is limited, and the maintenance cost is high.
In order to solve the above problems, embodiments of the present invention provide an electrical tray assembly and a converter, wherein the electrical tray assembly is used for the converter, and 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, and fig. 1 and fig. 2 respectively show a perspective view and a top view of the electrical tray assembly according to the embodiment of the present invention, and an electrical tray assembly 100 of the present embodiment includes a base unit 110, a tray unit 120, and a plurality of electrical element units. The base unit 110 is used for fixing with the cabinet of the converter. The tray unit 120 is slidably coupled to the base unit 110. The plurality of electric component units are provided on the tray unit 120, and the plurality of electric component units are electrically connected as a strong electric circuit.
According to the electrical tray assembly 100 provided by the embodiment of the invention, a plurality of electrical element units can be carried on the tray unit 120, so that the modular electrical tray assembly 100 is obtained, part of the electrical element units in the converter can be pre-assembled on the tray unit 120 outside the converter cabinet, and then the whole is connected to the base unit 110 along with the tray unit 120 in a sliding manner, so that the part of the electrical element units are installed in the converter cabinet, and the problems of inconvenience in operation, time consumption and labor consumption caused by limited internal space of the cabinet when the electrical element units are directly assembled in the converter cabinet are solved. When the electrical tray assembly 100 is applied to a converter of a wind turbine generator system, the modular electrical tray assembly 100 greatly saves maintenance time and labor costs of the wind turbine generator system.
According to the electrical tray assembly 100 provided by the embodiment of the invention, the plurality of electrical element units on the tray unit 120 are electrically connected to form a strong current circuit, so that the strong current electrical elements in the converter are integrated into the tray unit 120 and separated from the weak current electrical elements in the converter, the layout of the electrical elements in the converter is optimized, and the mutual crossing of strong current routing paths and weak current routing paths is reduced or even avoided, so that the electromagnetic interference between the strong current circuit and the weak current circuit in the converter is relieved, and the reliability and the safety of the operation of electrical equipment are improved.
Fig. 3, 4, 5 show perspective, front, top views, respectively, of an electrical tray assembly according to an embodiment of the present invention. Fig. 6 and 7 are exploded perspective and front views illustrating a tray unit connection part electrical element unit in an electrical tray assembly according to an embodiment of the present invention, wherein fig. 6 is an exploded view illustrating a part of the structure of the resistor unit 130.
In some embodiments, the tray unit 120 includes a bottom plate 121, and the bottom plate 121 is slidably coupled to the base unit 110 along the first direction X. In some embodiments, the tray unit 120 further includes a first side plate 122, and the first side plate 122 is erected on one end of the bottom plate 121 along the first direction X.
As shown in fig. 1 and 2, in some embodiments, the plurality of electrical element units includes a resistance 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 disposed at both sides of the resistance unit 130 in a second direction Y, which intersects 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 invention, the voltage detection units 140 are located at two sides of the resistance unit 130 in the second direction Y, so that the convenience of interconnection of lines between the resistance unit 130 and the voltage detection units 140 is ensured, the occupied space of the resistance unit 130 and the voltage detection units 140 is smaller, the space utilization rate of the electrical tray assembly is improved, and the more reasonable layout of the electrical element units in the electrical tray assembly is realized.
As shown in fig. 1, 2 and 6, in some embodiments, the plurality of electrical component units further includes a switch component unit 150 and a wiring unit 160. The switching element unit 150 includes a plurality of switching elements 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 is a perspective view of a resistor unit in an electrical tray assembly according to an embodiment of the present invention, and referring to fig. 6 and 8, in some embodiments, the resistor unit 130 includes a first resistor subunit 131 and a second resistor subunit 132. The first resistor subunit 131 and the second resistor subunit 132 are disposed at an interval 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, taking the first resistor subunit 131 as a discharging resistor unit and the second resistor subunit 132 as a charging resistor unit as an example, the discharging resistor unit includes two or more discharging resistor modules arranged in an array, and the charging resistor unit includes two or more charging resistor modules arranged in an array.
In some embodiments, the resistance unit 130 further includes a resistance bracket 133. The resistance holder 133 includes a support portion 133a and a support portion 133b, and the support portion 133a and the bottom plate 121 are spaced apart from each other in a direction perpendicular to the bottom plate 121. The supporting portion 133b connects the bearing portion 133a with the bottom plate 121, and the first resistor subunit 131 is disposed on the bottom plate 121, specifically, the first resistor subunit 131 is located between the bearing portion 133a and the bottom plate 121. The second resistor subunit 132 is disposed on the bearing portion 133a, and specifically, the second resistor subunit 132 is disposed on a side surface of the bearing portion 133a away from the bottom plate 121.
In this embodiment, the supporting portions 133b are disposed at two ends of the bearing portion 133a in the second direction Y in pairs, so that the resistor support 133 has a substantially U-shaped structure. In some embodiments, the supporting portion 133b may have a plurality of heat dissipation holes H2.
In some embodiments, the resistance unit 130 further includes connection terminals 134, and the connection terminals 134 are disposed on the bearing part 133a of the resistance bracket 133 for electrically connecting the resistance unit 130 with other electrical element units.
Referring to fig. 6 and 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 fuse 153 may be set as needed.
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. The charging resistor unit is electrically connected to the first contactor 151 and the voltage detection unit 140 to form a charging circuit, and the discharging resistor unit is electrically connected to the second contactor 152, the fuse 153 and the voltage detection unit 140 to form a discharging circuit.
In some embodiments, the charging circuit is bridged at the upstream and downstream of the main breaker on the grid side of the converter, a charging loop is formed by attracting the charging contact before the main breaker is attracted, the anti-parallel diodes in the power full bridge play a role of uncontrolled rectification, the charging resistance unit is used for inhibiting charging current, and the pre-charging loop is AC 690V.
In some embodiments, the discharging circuit is bridged on a direct current bus bar of the converter, and the discharging circuit is used for consuming energy stored on the direct current bus bar under the condition of converter failure or shutdown maintenance, so that the safety of maintenance personnel is ensured, and the direct current of the discharging circuit is plus or minus 600V.
The embodiment of the invention modularly integrates the charging circuit, the discharging circuit (the charging circuit and the discharging circuit can be 2 circuits) and the voltage detection circuit, and integrates the AC 690V circuit and the DC plus-minus 600V circuit in the converter into the electric tray assembly 100, so that the voltage levels in the converter cabinet are distinguished and detailed, the interference between strong current and weak current is optimized, the EMC anti-interference capability is integrally improved, and the maintenance and the inspection are convenient.
Referring to fig. 3 to 5, in some embodiments, the first side plate 122 is provided with a component mounting rail 122a and a harness mounting panel 122b, and the harness mounting panel 122b is located on two sides of the component mounting rail 122a in the second direction Y.
The element mounting rail 122a is disposed on a side surface of the first side plate 122 facing away from the resistance unit 130 and extends in the first direction X, and the element mounting rail 122a can fix at least part of the electrical elements of the switching element unit 150. In the present embodiment, the first contactor 151, the second contactor 152, and the fuse 153 of the switching element unit 150 are fixed to the element mounting rail 122a.
The wire harness mounting panel 122b includes a plurality of wire connection holes H1. The wiring unit 160 includes a plurality of harness interfaces 161, and the harness interfaces 161 can be connected to the wiring holes H1.
In some embodiments, the harness interface 161 includes at least one of a D-sub interface, a wire terminal, or a harness connector.
Fig. 9a and 9b illustrate perspective views of an exemplary harness interface 161, which is a D-sub interface, in an electrical tray assembly according to an embodiment of the present invention. The D-sub interface comprises a D-sub interface female head 161a and a D-sub interface male head 161 b. The D-sub interface male head 161b is provided with a contact pin and a fastening screw, and the D-sub interface female head 161a is provided with a jack which is correspondingly matched with the contact pin of the D-sub interface male head 161b and a connecting hole which is correspondingly matched with the fastening screw.
Fig. 9a shows a state where the D-sub interface female head 161a and the D-sub interface male head 161b are not connected, and fig. 9a shows a state where 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 connector 161b and the D-sub interface female connector 161a are installed in the wiring hole H1 of the harness installation panel 122b, and the pin of the D-sub interface male connector 161b is inserted into the jack of the D-sub interface female connector 161a to electrically connect the D-sub interface male connector 161b and the D-sub interface female connector 161 a. And then, the fastening screw of the D-sub interface male head 161b is connected and fastened with the connecting hole of the D-sub interface female head 161a to complete the installation.
In the life cycle of the whole product, if the whole tray unit 120 needs to be disassembled and taken out of the converter cabinet body during maintenance, the fastening screws of the D-sub interface male heads 161b are loosened, then the D-sub interface male heads 161b are pulled out, the interfaces disconnect the electrical connection between each electrical element in the electrical tray assembly 100 and other parts in the cabinet body, and the whole tray unit 120 is conveniently moved out of the converter cabinet body in a sliding manner for maintenance.
Fig. 10 illustrates a perspective view of another example of a wire harness interface in an electrical tray assembly, the wire harness interface 161 being a wire harness connector, in accordance with an embodiment of the present invention. The harness connector includes a connector male head 161c, a connector female head 161d, a connector male head fitting 161e, and a connector female head base 161f. The female connector 161d is fixed to the harness mounting panel 122b by a female connector mount 161f, wherein the female connector 161d is positioned in the wiring hole H1. The wire harness is electrically connected to the connector male connector 161c through the connector male connector 161 e. 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 holes of the female connector 161d, thereby achieving electrical connection therebetween. The female connector 161d is provided with a plurality of connection terminals that can be electrically connected to the plurality of electrical component units in the electrical tray assembly 100, respectively.
Referring to fig. 3 to 7, in some embodiments, the first side plate 122 further has a first wire slot 122c and a wire passing hole 122d. The first wire slot 122c is disposed on the same side as the component mounting rail 122a and extends in the same direction, the first wire slot 122c is located on a side of the component mounting rail 122a away from the bottom plate 121, the first wire slot 122c can accommodate a wire, the wire passing hole 122d is located on a side of the component mounting rail 122a close to the bottom plate 121, and the wire passing hole 122d allows the wire to pass through.
In some embodiments, the bottom plate 121 is provided with second wire grooves 121a, and the second wire grooves 121a are disposed at both sides of each voltage detection unit 140 in the second direction Y.
In some embodiments, the tray unit 120 further includes a harness securing structure 123 for securing at least a portion of the harness of the docking unit 160. The wire harness fixing structure 123 is a binding beam connected to the base plate 121 and positioned corresponding to the wire harness installation panel 122b in some embodiments.
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 lock the tray unit 120 and the base unit 110 in a state where the tray unit 120 is received in the base unit 110. In some embodiments, after the tray unit 120 is received in the base unit 110, the locking portion 122e of the tray unit 120 can be locked and connected to the base unit 110 by a connector such as a bolt, so as to prevent the tray unit 120 from being unnecessarily displaced.
Fig. 11 illustrates an exploded perspective view of a voltage detection unit in an electrical tray assembly according to an embodiment of the present invention, and 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 connection portion 141a and a side connection portion 141b, the bottom connection portion 141a is connected to the base plate 121, and the side connection portion 141b is erected on the bottom connection portion 141 a. The plurality of voltage detection modules 142 are connected to the side connection parts 141b, respectively, and are spaced apart from each other. The voltage detection module 142 has two opposite surfaces, at least one of which has a voltage sensor disposed thereon.
In some embodiments, in each of the voltage detection bases 141, the side connection portions 141b are disposed in pairs at both ends of the bottom connection portion 141a in the second direction Y, and each of the side connection portions 141b extends in the first direction X, so that the voltage detection base 141 has a substantially U-shaped structure. Each side connecting portion 141b is provided with a slot GR1, an extending direction of the slot GR1 intersects with the bottom plate 121, one end of the slot GR1, which is far away from the bottom plate 121, is provided with a notch GK1, and the voltage detection module 142 is inserted into the slot GR1 through the notch GK 1.
In some embodiments, the voltage detection unit 140 further includes a stopper 143, and the stopper 143 is connected to an end of the side connection portion 141b far from the bottom plate 121, so that the notch GK1 is closed. In some embodiments, the position-limiting member 143 is a bar-shaped position-limiting member 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 limiting member 143 is connected to the side connecting portion 141b of the pressure detection base 141, so that the assembly of the voltage detection unit 140 can be completed, and the operation is simple and the maintenance is convenient.
Fig. 12 illustrates 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 plates 111, each second side plate 111 is disposed perpendicular to a bottom plate 121, the plurality of second side plates 111 enclose each other, at least one pair of the second side plates 111 extends along a first direction X, and has a guide portion 111a slidably coupled with the bottom plate 121, and the guide portion 111a extends along the first direction X.
In some embodiments, the bottom plate 121 and/or the at least one second side plate 111 are provided with a plurality of heat dissipation holes H2, so as to facilitate heat dissipation of devices in each electrical component unit, ensure that components of the integrally-modular electrical tray assembly 100 operate at an allowable ambient temperature, and prolong the service life of the components.
In some embodiments, the electrical tray assembly 100 further includes a wire slot unit 170, the wire slot unit 170 being disposed on one of the second side plates 111, the position of the second side plate 111 on which the wire slot unit 170 is disposed corresponding to the position of the first side plate 121 of the tray unit 120. The routing path of at least a portion of the wiring harness of the wiring unit 160 passes through the wire duct unit 170.
According to the electrical tray assembly 100 provided by the embodiment of the invention, the structure of the electrical tray assembly 100 is basically in a symmetrical form, the layout and routing path is reasonable, and the installation is simple and easy to operate. All internal wiring of the electrical tray assembly 100 can be pre-set in advance outside the current cabinet. After the modular electrical tray assembly 100 which is internally wired and preset to be completed is integrally placed in the electric control cabinet, the wiring unit 160 is only required to be inserted to comprise the plurality of wiring harness interfaces 161, so that the electric connection of the wiring of the whole charging and discharging loop can be completed, the actual operation is simple, the wiring work of operators in the limited cabinet space is avoided, and meanwhile, the labor input cost can be saved.
When the components of the charge and discharge circuit of the electrical tray assembly 100 need to be maintained and disassembled, only the plurality of wire harness interfaces 161 of the wiring unit 160 need to be pulled down, the tray unit 120 slides to be separated from the chassis unit 110, and then the replacement of the components and the recovery work of the wires are completed outside the converter cabinet body, so that the maintenance time and labor cost of wind power are greatly saved.
The embodiment of the invention also provides a converter, for example, the converter in the wind generating set.
Fig. 13 illustrates a perspective view of a current transformer according to an embodiment of the present invention, the current transformer 1000 including a cabinet 200 and the electrical tray assembly 100 of any of the above examples. The cabinet 200 has an accommodating space, the base unit 110 of the electrical tray assembly 100 is located in the accommodating space and fixed to the cabinet 200, and the tray unit 120 of the electrical tray assembly 100 can be slidably received on the base unit 110 relative to the base unit 110.
According to the current transformer provided by the embodiment of the invention, a plurality of electrical element units can be carried on the tray unit 120 of the electrical tray assembly 100, so that the modular electrical tray assembly 100 is obtained, part of the electrical element units in the current transformer can be preassembled on the tray unit 120 outside the current transformer cabinet, and then the whole is connected to the base unit 110 along with the tray unit 120 in a sliding manner, so that the part of the electrical element units are installed in the current transformer cabinet 200, and the problems of inconvenience in operation, time consumption and labor consumption caused by the limited inner space of the cabinet 200 when the electrical element units are directly assembled in the current transformer cabinet 200 are solved. When the converter is a wind turbine generator system converter, the modular electrical tray assembly 100 greatly saves maintenance time and labor costs of the wind turbine generator system, particularly, reduces maintenance time and costs of the offshore wind turbine generator system.
The plurality of electrical element units on the tray unit 120 of the electrical tray assembly 100 are electrically connected to form a strong current circuit, so that the strong current electrical elements in the converter are integrated in the tray unit 120 and separated from the weak current electrical elements in the converter, the layout of the electrical elements in the converter is optimized, and the mutual crossing of strong current wiring paths and weak current wiring paths is reduced or even avoided, so that the electromagnetic interference between the strong current circuit and the weak current circuit in the converter is relieved, and the reliability and the safety of the operation of the electrical equipment are improved.
In some embodiments, the plurality of electrical element units includes a resistance 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 disposed at both sides of the resistance unit 130 in a second direction Y that intersects the first direction X. In some embodiments, the second direction Y is perpendicular to the first direction X. According to the structure, the convenience of line interconnection between the resistance unit 130 and the voltage detection unit 140 is ensured, meanwhile, the occupied space of the resistance unit 130 and the voltage detection unit 140 is smaller, the space utilization rate of the electric tray assembly is improved, and the more reasonable layout of the electric element units in the electric tray assembly is realized.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (11)
1. An electrical pallet assembly (100) for a current transformer, comprising:
a base unit (110);
a tray unit (120), the tray unit (120) comprising a base plate (121), the base plate (121) being slidably connected to the base unit (110) along a first direction (X); and
a plurality of electric component units provided on the tray unit (120), the plurality of electric component units being electrically connected as a strong electric circuit, the plurality of electric component units including a resistance unit (130) and a voltage detection unit (140), the resistance unit (130) and the voltage detection unit (140) being provided on the base plate (121), wherein the voltage detection unit (140) is located on both sides of the resistance unit (130) in a second direction (Y) that intersects the first direction (X),
wherein the resistance unit (130) comprises:
the resistor comprises a first resistor subunit (131), a second resistor subunit (132) and a resistor support (133), wherein the resistor support (133) comprises a bearing part (133 a) and a supporting part (133 b), the bearing part (133 a) and the bottom plate (121) are arranged at intervals in the direction perpendicular to the bottom plate (121), the supporting part (133 b) connects the bearing part (133 a) and the bottom plate (121), the first resistor subunit (131) is arranged on the bottom plate (121), the second resistor subunit (132) is arranged on the bearing part (133 a), and the first resistor subunit (131) and the second resistor subunit (132) are arranged at intervals in the 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, the other one is a discharging resistor unit, the charging resistor unit is electrically connected with the voltage detection unit (140) to form an alternating current charging circuit, and the discharging resistor unit is electrically connected with the other voltage detection unit (140) to form a direct current discharging circuit.
2. The electrical tray assembly (100) of claim 1, wherein the tray unit (120) further comprises:
a first side plate (122), the first side plate (122) being vertically provided at one end of the bottom plate (121) along the first direction (X),
the plurality of electrical component units further include:
a switching element unit (150) and a wiring unit (160), the switching element unit (150) and the wiring unit (160) being 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).
3. The electrical tray assembly (100) of claim 2, wherein the switching element unit (150) comprises a first contactor (151), a second contactor (152), and a fuse (153),
the charging resistor unit is electrically connected with the first contactor (151) and the voltage detection unit (140) to form a charging circuit, and the discharging resistor unit is electrically connected with the second contactor (152), the fuse (153) and the voltage detection unit (140) to form a discharging circuit.
4. The electrical tray assembly (100) of claim 2, wherein the first side plate (122) is provided with a component mounting rail (122 a) and a harness mounting panel (122 b), the harness mounting panel (122 b) being located on both sides of the component mounting rail (122 a) in the second direction (Y),
the element mounting rail (122 a) is arranged on one side surface of the first side plate (122) facing away from the resistance unit (130) and extends along the first direction (X), the element mounting rail (122 a) can fix at least part of the electric elements of the switch element unit (150),
the wire harness mounting panel (122 b) includes a plurality of wire connection holes (H1),
the wiring unit (160) comprises a plurality of harness interfaces (161), and the harness interfaces (161) can be connected with the wiring holes (H1).
5. The electrical tray assembly (100) of claim 4, wherein the harness interface (161) comprises at least one of a D-sub interface, a wire terminal, or a harness connector.
6. The electrical tray assembly (100) of claim 4, wherein the first side plate (122) is further provided with a first wire slot (122 c) and a wire passing hole (122 d),
the first wire groove (122 c) is arranged on the same side of the element mounting rail (122 a) and extends in the same direction, the first wire groove (122 c) is positioned on one side of the element mounting rail (122 a) far away from the bottom plate (121), and the first wire groove (122 c) can accommodate a lead,
the wire passing hole (122 d) is located on one side of the component mounting rail (122 a) close to the bottom plate (121), the wire passing hole (122 d) allowing a wire to pass therethrough;
the bottom plate (121) is provided with second wire grooves (121 a), and the second wire grooves (121 a) are formed in two sides of each voltage detection unit (140) along the second direction (Y).
7. The electrical tray assembly (100) according to claim 2, wherein at least one end of the first side plate (122) in the second direction (Y) is provided with a locking portion (122 e), and the locking portion (122 e) is capable of locking the tray unit (120) with the base unit (110) in a state where the tray unit (120) is received in the base unit (110).
8. The electrical tray assembly (100) of claim 1, wherein the voltage detection unit (140) comprises:
a voltage detection base (141) including a bottom connection portion (141 a) and a side connection portion (141 b), the bottom connection portion (141 a) being connected to the bottom plate (121), the side connection portion (141 b) being erected on the bottom connection portion (141 a);
a plurality of voltage detection modules (142), the plurality of voltage detection modules (142) being respectively connected to the side connection parts (141 b) and being disposed at intervals from one another.
9. The electrical tray assembly (100) according to claim 8, wherein in each of the voltage detection bases (141), the side connection parts (141 b) are disposed in pairs at both ends of the second direction (Y) of the bottom connection part (141 a), each of the side connection parts (141 b) extends in the first direction (X), each of the side connection parts (141 b) is provided with a slot (GR 1), the extending direction of the slot (GR 1) intersects with the bottom plate (121), one end of the slot (GR 1) away from the bottom plate (121) has a notch (GK 1), and the voltage detection module (142) is inserted into the slot (GR 1) through the notch (GK 1),
the voltage detection unit (140) further comprises:
and a stopper (143) connected to one end of the side connecting portion (141 b) remote from the bottom plate (121) so that the notch (GK 1) is closed.
10. The electrical tray assembly (100) according to claim 1, wherein the base unit (110) comprises a plurality of second side plates (111), each of the second side plates (111) is disposed perpendicular to the bottom plate (121), the plurality of second side plates (111) enclose each other, wherein at least one pair of the second side plates (111) extends in the first direction (X) and has a guide portion (111 a) slidably connected to the bottom plate (121), the guide portion (111 a) extends in the first direction (X),
the bottom plate (121) and/or at least one second side plate (111) are/is provided with a plurality of heat dissipation holes.
11. A current transformer, comprising:
a cabinet having an accommodating space; and
the electrical tray assembly (100) of any one of claims 1 to 10, wherein the base unit (110) of the electrical tray assembly (100) is located within the receiving space and is fixed to the cabinet, and the tray unit (120) of the electrical tray assembly (100) is receivable on the base unit (110) by sliding relative to the base unit (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911031760.8A CN112739131B (en) | 2019-10-28 | 2019-10-28 | Electrical tray assembly and converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911031760.8A CN112739131B (en) | 2019-10-28 | 2019-10-28 | Electrical tray assembly and converter |
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| Publication Number | Publication Date |
|---|---|
| CN112739131A CN112739131A (en) | 2021-04-30 |
| CN112739131B true CN112739131B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911031760.8A Active CN112739131B (en) | 2019-10-28 | 2019-10-28 | Electrical tray assembly and converter |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001130334A (en) * | 1999-11-08 | 2001-05-15 | Matsushita Electric Ind Co Ltd | On-vehicle equipment system |
| US7005996B2 (en) * | 2002-12-13 | 2006-02-28 | Adc Telecommunications, Inc. | Power distribution panel with modular inserts |
| TWM250282U (en) * | 2004-01-20 | 2004-11-11 | Quanta Comp Inc | Hard disk driver tray module |
| CN204652838U (en) * | 2015-05-14 | 2015-09-16 | 铁力山（北京）控制技术有限公司 | A kind of strong and weak electricity cabling separate type control desk |
| CN205141248U (en) * | 2015-11-26 | 2016-04-06 | 韩正强 | Forceful electric power terminal row connector |
| CN205453514U (en) * | 2016-01-05 | 2016-08-10 | 中兴通讯股份有限公司 | Photovoltaic inverter's rack and photovoltaic inverter |
| JP2018040607A (en) * | 2016-09-06 | 2018-03-15 | 株式会社オートネットワーク技術研究所 | Detection circuit and power storage pack |
| CN207802616U (en) * | 2017-12-28 | 2018-08-31 | 中国电信股份有限公司 | Integrated comprehensive communication cabinet |
| CN208938228U (en) * | 2018-09-10 | 2019-06-04 | 虫极科技（北京）有限公司 | A kind of cabinet top cabinet and Intelligent cargo cabinet |
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