A direct current feeder screen

Abstract

The application relates to a DC feeder screen, a set of plug-and-drawer integrated modules of DC insulation monitoring devices which can be replaced without power interruption are arranged in the DC feeder screen, and are used for realizing the control and plug of feeder branch output loops, collection sensing elements and their loops through the plug-and-drawer integrated modules, automatically short-circuiting the hollow plug branch output loop in the plug to realize uninterrupted power supply of the branch, and automatically connecting the collection sensing elements when the plug-and-drawer integrated modules are plugged in. The DC feeder screen can improve the efficiency of DC power supply network reconstruction and the safety of on-site operation, and saves cost investment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power, in particular to a DC feeder screen. BACKGROUND

[0002] In order to ensure sufficient collection accuracy of the feeder branch sensing element, most manufacturers generally adopt closed sensing element design for the insulation monitoring device of the existing DC power supply system in the station. Once the insulation monitoring device reaches the operation life or the equipment fails, although the output loop of the DC power supply feeder branch is evaluated to be in good overall operation state, based on the closed design of the collection sensing element and the fact that the collection sensing elements produced by different manufacturers or even by the same manufacturer at different times are difficult to be compatible, the whole DC feeder screen is generally replaced in the actual engineering application, and the insulation monitoring device is difficult to be replaced alone. At present, the DC feeder screen configured in the station is used to supply power to the secondary important load equipment such as protection and control in the station, and the primary and secondary equipment are both live during normal operation. Due to the influence of the grid structure and regional power supply load, the DC power supply power-off reconstruction scheme of the primary and secondary equipment in the station is difficult to implement in the actual engineering application, and therefore the DC feeder screen power-off replacement and direct loop reconstruction scheme are not feasible, and a new DC feeder screen needs to be placed in another empty screen position, so a large amount of output branch control cables also need to be replaced at the same time. In addition to increasing the engineering cost, the long construction period, high risk and great danger of on-site operation also bring a series of problems.

[0003] At present, the collection sensing element of some manufacturers in the market adopts open design, which can meet the demand of non-power-off replacement of the insulation monitoring device, but due to the influence of the collection accuracy of the sensing element, the open collection sensing element is generally applied to the insulation monitoring device based on the "AC injection method" branch selection principle.

[0004] At present, some manufacturers propose a DC output air switch and collection sensing element integrated module structure design of the DC feeder screen, which is beneficial to the replacement of the damaged or faulty DC air switch or collection sensing element of the feeder branch, but the structure design will cause the output branch to be powered off when the module is pulled out, and because the module frame structure is fixed, the collection sensing element can only use the same type of equipment of the manufacturer, and it is difficult to be compatible with other manufacturers.

[0005] Therefore, how to solve the insulation monitoring device replacement without power-off when the DC feeder screen is not replaced is a problem to be solved. SUMMARY

[0006] The purpose of the present application is to provide a DC feeder screen, which can improve the DC power supply network reconstruction efficiency and the safety of on-site operation, and save the cost investment.

[0007] In order to achieve the above object, the technical scheme adopted by the present application is: a DC feeder screen, a set of plug-and-draw integrated modules of DC insulation monitoring devices which can be replaced without power interruption are arranged in the DC feeder screen, which are used to realize the control of the feeder branch output loop, the collection of sensing elements and their loop through the plug-and-draw integrated modules, when the plug-and-draw integrated modules are pulled out, the hollow plug-in branch output loop is automatically short-circuited to realize uninterrupted power supply of the branch, and when the plug-and-draw integrated modules are inserted, the collection of sensing elements is automatically connected.

[0008] Further, the DC feeder screen comprises a plurality of DC output branches, a plurality of DC air breakers, a set of insulation monitoring devices and a DC bus voltage meter are arranged in the front cabinet of the DC feeder screen; a DC bus bar, a plurality of collection monitoring modules of the insulation monitoring devices and a plurality of plug-and-draw integrated modules are arranged in the back cabinet of the DC feeder screen, each collection monitoring module is connected to a plurality of feeder branches, and each plug-and-draw integrated module collects a plurality of feeder branches; the plug-and-draw integrated modules and the collection monitoring modules are installed on the horizontal rack panel in the DC feeder screen.

[0009] Further, the mounting panels of the DC air breakers, the insulation monitoring devices and the DC bus voltage meter all adopt front opening type cabinet doors.

[0010] Further, the DC feeder screen comprises 48 DC output branches, 48 DC air breakers, a set of insulation monitoring devices and a DC bus voltage meter are arranged in the front cabinet of the DC feeder screen; a DC bus bar, 5 collection monitoring modules of the insulation monitoring devices and 10 plug-and-draw integrated modules are arranged in the back cabinet of the DC feeder screen, each collection monitoring module is connected to 8-16 feeder branches, and each plug-and-draw integrated module is connected to 5 feeder branches.

[0011] Further, one plug-and-draw integrated module comprises a plug-in A component of a plurality of air breaker output branches, a plug-in B component, a sensing element CT integrated drawer and a groove box, the plug-in B component and the sensing element CT integrated drawer comprise the plug-in B component, the sensing element CT and the integrated drawer, the plug-in B component and the sensing element CT are integratedly installed on the integrated drawer, the plug-in A component is a plug-in base, the plug-in B component is a plug-in connector, the plug-in B component realizes the connection control of the sensing element, the plug-in B component is connected with the plug-in A component in cooperation, the bottom of the integrated drawer is provided with a sliding rail, the bottom surface of the groove box is provided with a track, and the plug-and-draw integrated drawer is pulled out or inserted through the cooperation of the sliding rail and the track, so as to facilitate the replacement of the internal sensing element.

[0012] Further, the integrated drawer has a redundant structure design to reserve space for the installation and arrangement of sensing elements of insulation monitoring devices of other manufacturers.

[0013] Further, the connecting press buckle is arranged between the plug A component and the plug B component, and the connecting press buckle is pressed when the integrated drawer is inserted and is released when the integrated drawer is pulled out, so as to ensure reliable pressure connection between the plug A component and the plug B component.

[0014] Further, the tank box comprises a tank box upper cover plate, a tank box left side plate, a tank box right side plate and a tank box lower bottom plate, the tank box lower bottom plate is in an open structure, the tank box left side plate and the tank box right side plate are fixedly installed on the horizontal row panel of the DC feeder screen inner support, the tank box upper cover plate is connected with the tank box left side plate and the tank box right side plate through a live buckle structure, so as to facilitate the extraction of the tank box upper cover plate to check the plug base and related wiring; the plug base is installed on the horizontal row panel at the rear side of the tank box, and the horizontal row panel has a wiring leading-out space at the rear side, the plug base terminal leads out wiring, and the other end of the wiring is connected with the air switch and the terminal row of the feeder branch; the tank box lower bottom plate is provided with a track matched with the bottom slide rail of the integrated drawer, so as to realize the pull-out and insertion functions of the integrated drawer; the tank box right side plate is provided with a sensing element signal acquisition and power terminal row, the inside of the terminal row is connected with the sensing element through a prefabricated plug, and the outside of the terminal row is connected with the acquisition and monitoring module through wiring and is connected into the insulation monitoring device.

[0015] Further, the plug A component, i.e. the plug socket, comprises 10 wiring terminals of A1-A10, and all the terminal wiring is arranged through the wiring at the rear side of the horizontal row panel; the ① end of all the A1-A10 wiring terminals is connected with the positive and negative output wiring of the lower end of the 101Z-105Z feeder air switch, and the ② end of all the A1-A10 wiring terminals is connected with the positive and negative wiring of the 101Z-105Z feeder branch of the DC feeder screen terminal row; in order to prevent the positive and negative wiring terminals from being not separated and causing short circuit in operation, the positive and negative wiring terminals are arranged separately, the ① and ② ends of A1-A5 are respectively connected with the positive output of the lower end of the 101Z-105Z feeder air switch and the terminal row 101Z-105Z feeder branch, and the ① and ② ends of A6-A10 are respectively connected with the negative output of the lower end of the 101Z-105Z feeder air switch and the terminal row 101Z-105Z feeder branch; before the plug of the plug B component is inserted into the base of the plug A component, the terminals between A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-② and A10-① and A10-② are in conduction, and after the plug of the plug B component is completely inserted into the base of the plug A component, the terminals between A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-② and A10-① and A10-② are disconnected.

[0016] Further, the navigation plug B component, namely the navigation plug, includes 10 connecting terminals B1-B10, the terminals ③ and ④ of the plug B1-B10 are not conductive, the positive and negative connecting terminals are arranged separately, the positive connecting terminal of the sensing element CT1 of the 101Z feeder branch is connected to the terminals ③ and ④ of B1, the negative connecting terminal of the sensing element CT1 of the 101Z feeder branch is connected to the terminals ③ and ④ of B6, the terminal ③ is connected to the CT polarity terminal, and the terminal ④ is connected to the CT non-polarity terminal; the positive and negative connecting terminals of the sensing elements CT2-CT5 of the 102Z-105Z feeder branches are connected to the terminals ③ and ④ of B2-B5 and B7-B10, respectively; when the plug of the navigation plug B component is just inserted into the base of the navigation plug A component, A1-① and B1-③, A1-② and B1-④, A2-① and B2-③, A2-② and B2-④, A3-① and B3-③, A3-② and B3-④, A4-① and B4-③, A4-② and B4-④, A5-① and B5-③, A5-② and B5-④, A6-① and B6-③, A6-② and B6-④, A7-① and B7-③, A7-② and B7-④, A8-① and B8-③, A8-② and B8-④, A9-① and B9-③, A9-② and B9-④, A10-① and B10-③, and A10-② and B10-④ are connected; after the plug of the navigation plug B component is completely inserted into the base of the navigation plug A component, while the above terminals are continuously connected, the terminals A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-②, and A10-① and A10-② are disconnected, at this time, the 101Z-105Z feeder air switch output loop is connected in series to the sensing elements CT1-CT5.

[0017] Compared with the prior art, the present application has the following beneficial effects: the present application provides a novel DC feeder screen, a set of navigation plug and drawer integrated structure module for replacing the DC insulation monitoring device without power interruption is designed in the DC feeder screen, the feeder branch output loop, the collection sensing element and its loop are controlled and plugged by the navigation plug drawer, when the module is pulled out, the air switch branch output loop in the navigation plug is automatically short-circuited to realize uninterrupted power supply of the branch, and when the module is inserted, the collection sensing element is automatically connected. The DC feeder screen realizes separate replacement of the collection sensing element, without branch power transfer or power interruption, and the redundant structure design in the drawer can be compatible with the size of the collection sensing element of different manufacturers. The application of the DC feeder screen can quickly improve the efficiency of the DC power supply network reconstruction, greatly improve the safety of the on-site operation, save the cost investment, has strong practicability and broad application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1is the front structure schematic view of the DC feeder screen of the embodiment of the present application;

[0019] Figure 2 is the back structure schematic view of the DC feeder screen of the embodiment of the present application;

[0020] Figure 3 is the structure schematic view of the drawer integrated module of the embodiment of the present application;

[0021] Figure 4 is the wiring schematic view of the feeder branch 1-5 jack A component (jack socket) of the embodiment of the present application;

[0022] Figure 5 is the wiring schematic view of the lower end of the feeder branch 1-5 air switch of the embodiment of the present application;

[0023] Figure 6 is the wiring schematic view of the terminal strip of the feeder branch 1-5 of the embodiment of the present application;

[0024] Figure 7 is the wiring schematic view of the feeder branch 1-5 jack B component (jack plug) of the embodiment of the present application;

[0025] Figure 8 is the wiring schematic view of the sensing element of the feeder branch 1-5 of the embodiment of the present application;

[0026] Figure 9 is the wiring schematic view of the jack control principle of the feeder branch 1 of the embodiment of the present application.

[0027] In the figure: 1 - slot box upper cover plate; 2 - slot box right side plate; 3 - slot box left side plate; 4 - slot box lower bottom plate; 5 - drawer front panel; 6 - drawer right side plate; 7 - drawer left side plate; 8 - drawer lower bottom plate; 9 - sensing element CT; 10 - jack plug; 11 - jack base; 12 - feeder screen horizontal row panel; 13 - track; 14 - sensing element signal acquisition and power supply wiring terminal strip; 15 - slot box right side plate reserved import and export; 16 - connecting press buckle; 17 - movable press buckle. DETAILED DESCRIPTION

[0028] The present application is further described below in conjunction with the drawings and embodiments.

[0029] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0030] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0031] The embodiment provides a DC feeder screen, a set of plug-and-draw integrated modules of DC insulation monitoring device which can be replaced without power outage are arranged in the DC feeder screen, and the plug-and-draw integrated modules are used for realizing control of plug-in and plug-out of feeder branch output loops, collection sensing elements and loops thereof, automatically short-circuiting the hollow opening branch output loop in the plug when the plug-and-draw integrated modules are pulled out to realize uninterrupted power supply of the branch, and automatically accessing the collection sensing elements when the plug-and-draw integrated modules are plugged in.

[0032] In the embodiment, the DC feeder screen includes 48 DC output branches. The front cabinet of the DC feeder screen is provided with 48 DC air breakers (the number of output air breakers can be customized according to user requirements), a set of insulation monitoring devices and a DC bus voltage meter. The front view of the screen cabinet is as shown in Figure 1 The back cabinet of the DC feeder screen is provided with DC busbars, five collection monitoring modules of the insulation monitoring device and ten plug-and-draw integrated modules. According to configuration requirements of different manufacturers, each collection monitoring module can access 8-16 feeder branches, and each plug-and-draw integrated module accesses 5 feeder branches. The back view of the screen cabinet is as shown in Figure 2 The plug-and-draw integrated modules and the collection monitoring modules are installed on the bracket horizontal panel in the DC feeder screen.

[0033] In the embodiment, the installation panels of the DC air breakers, the insulation monitoring devices and the DC bus voltage meter all adopt front opening cabinet doors (the left side is a fixed bearing, and the right side is a screw fixed rotary opening), which facilitates element replacement.

[0034] The plug-and-draw integrated module is a main innovation point of the application, and the design of one plug-and-draw integrated module (accessing 5 feeder branches) in the DC feeder screen is further described below.

[0035] The overall structure design of the plug-and-draw integrated module is as shown in Figure 3As shown. One navigation plug and drawer integrated module includes 5-way air switch output branch navigation plug A component 11, navigation plug B component and sensing element CT integrated drawer and slot box, the navigation plug B component and sensing element CT integrated drawer includes navigation plug B component 10, sensing element CT 9 and integrated drawer, the navigation plug B component, sensing element CT integrated installation on the integrated drawer, the navigation plug A component is navigation plug base, the navigation plug B component is navigation plug plug, the navigation plug B component realizes sensing element access control, the navigation plug B component is connected with the navigation plug A component, the bottom of the integrated drawer is provided with a slide rail, the bottom surface of the slot box is provided with a track 13, and the integrated drawer is pulled out and inserted by the cooperation of the slide rail and the track. In order to facilitate the replacement of internal sensing elements.

[0036] As Figure 3 As shown, the integrated drawer includes drawer front panel 5, drawer left side plate 7, drawer right side plate 6 and drawer lower bottom 8, the drawer right side plate 6 is provided with an inlet and outlet as a sensing element to slot box terminal plug lead channel. The integrated drawer has a redundant structure design, and a reserved space is provided to accommodate the installation and arrangement of sensing elements of insulation monitoring devices of other manufacturers. The bottom of the integrated drawer is provided with a slide rail, which constitutes an integrated design with the track on the lower bottom plate of the slot box to facilitate the insertion and fixation of the drawer. The connection buckle 16 is arranged between the navigation plug A component and the navigation plug B component. When the integrated drawer is inserted, the connection buckle is compressed, and when the integrated drawer is pulled out, the connection buckle is loosened, so as to ensure the reliable compression connection between the navigation plug A component and the navigation plug B component. The integrated drawer is inserted and pulled out by the drawer handle under the condition of electrification, so as to realize convenient and rapid replacement without power failure when the equipment fails or the insulation monitoring device fails, and effectively improve the replacement efficiency and safety.

[0037] The slot box designed in the integrated module is used to fix the navigation plug and drawer integrated module, and the structure is as Figure 3The groove box is an incomplete sealing design, and the groove box includes a groove box upper cover plate 1, a groove box left side plate 3, a groove box right side plate 2 and a groove box lower bottom plate 4. The groove box lower bottom plate is an open structure, and the groove box left side plate and the groove box right side plate are fixedly installed on the DC feeder screen inner support horizontal row panel through bolts. The groove box upper cover plate is connected with the groove box left side plate and the groove box right side plate through a movable buckle structure. The groove box upper cover plate can be pulled out forward by opening the movable buckle 17, so as to facilitate the inspection of the aviation plug base and related wiring. The aviation plug base 11 is installed on the feeder screen horizontal row panel 12 at the rear side of the groove box. The horizontal row panel has a wiring leading-out space at the rear side. The aviation plug base terminal leads out wiring, and the other end of the wiring is connected with the air switch and the terminal row of the feeder branch. The groove box lower bottom plate is provided with a track matched with the integrated drawer bottom slide rail, so as to realize the pull-out function of the integrated drawer. The groove box right side plate is provided with a sensing element signal acquisition and power wiring terminal row. The inside of the terminal row is connected with the sensing element through a prefabricated plug (5 spare terminals are reserved). The outside of the terminal row is connected with the acquisition and monitoring module through wiring and is connected into the insulation monitoring device. At the same time, in order to meet the replacement of the insulation monitoring device in the later period, when other acquisition wiring is added, the groove box right side plate has a reserved inlet and outlet 15, which can meet the needs of other wiring access in the later period. When the newly replaced insulation monitoring acquisition wiring is different from the prefabricated terminal wiring, the wiring terminal can also be redefined and adjusted to meet the access needs of different manufacturers.

[0038] The aviation plug A component (aviation plug socket) wiring schematic diagram is shown in Figure 4 The aviation plug socket includes 10 wiring terminals A1-A10. All the terminal wiring is arranged at the rear of the horizontal row panel, and is led out to the air switch and the feeder terminal DC output wiring at the rear end of the horizontal row panel. The ① end of all the A1-A10 wiring terminals is connected with the positive and negative output wiring of the lower end of the feeder air switch 101Z-105Z. The lower end of the feeder branch air switch wiring schematic diagram is shown in Figure 5 The ② end of all the A1-A10 wiring terminals is connected with the positive and negative wiring of the feeder branch of the terminal row 101Z-105Z of the DC feeder screen. The terminal row wiring diagram is shown in Figure 6The positive and negative terminals are arranged separately to prevent short circuiting in operation. The ① and ② terminals of A1-A5 are connected to the lower end of the 101Z-105Z feeder air break and the positive output of the terminal row 101Z-105Z feeder branch respectively, and the ① and ② terminals of A6-A10 are connected to the lower end of the 101Z-105Z feeder air break and the negative output of the terminal row 101Z-105Z feeder branch respectively. Before the plug of the socket B component is inserted into the base of the socket A component, the terminals between A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-②, and A10-① and A10-② are connected. After the plug of the socket B component is completely inserted into the base of the socket A component, the terminals between A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-②, and A10-① and A10-② are disconnected.

[0039] The schematic diagram of the connection between the socket B component (socket plug) and the sensing element is shown in Fig. 4. Figure 7 、 Figure 8The shown. The plug includes B1-B10 total 10 terminals, the plug B1-B10 between the ③, ④ terminals are not conductive, the design also separates the positive and negative terminals, the positive terminal of the sensing element CT1 of the 101Z feeder branch is connected to the ③, ④ terminals of B1, the negative terminal of the sensing element CT1 of the 101Z feeder branch is connected to the ③, ④ terminals of B6, the ③ terminal is connected to the CT polarity terminal, and the ④ terminal is connected to the CT non-polarity terminal. Similarly, the positive and negative terminals of the sensing elements CT2-CT5 of the 102Z-105Z feeder branches are respectively connected to the ③, ④ terminals of B2-B5 and the ③, ④ terminals of B7-B10. When the plug of the B part of the navigation plug is just inserted into the base of the A part of the navigation plug, A1-① and B1-③, A1-② and B1-④, A2-① and B2-③, A2-② and B2-④, A3-① and B3-③, A3-② and B3-④, A4-① and B4-③, A4-② and B4-④, A5-① and B5-③, A5-② and B5-④, A6-① and B6-③, A6-② and B6-④, A7-① and B7-③, A7-② and B7-④, A8-① and B8-③, A8-② and B8-④, A9-① and B9-③, A9-② and B9-④, A10-① and B10-③, A10-② and B10-④ are connected; after the plug of the B part of the navigation plug is completely inserted into the base of the A part of the navigation plug, while the above terminals are continuously connected, A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-②, A10-① and A10-② are disconnected at this time, and the 101Z-105Z feeder air opening output loop is connected in series to the CT1-CT5 sensing elements.

[0040] Taking the single feeder branch control principle as an example, the navigation plug control principle wiring diagram is as follows Figure 9The positive and negative terminals of the DC bus are connected to the upper ends ① and ③ of the feeder air switch, and are connected to A1-① and A6-① of the A plug (plug socket) through the positive and negative output terminals ② and ④ of the lower end of the feeder air switch, and A1-② and A6-② of the A plug (plug socket) are connected to 1ZD-1 and 1ZD-6 of the terminal block. B1-③ and B6-③ of the B plug (plug) are connected to the positive and negative polarity terminals of the sensing element CT1, and B1-④ and B6-④ of the B plug (plug) are connected to the positive and negative non-polarity terminals of the sensing element CT1. When the integrated drawer plug is not inserted, A1-① and A1-②, and A6-① and A6-② are in the on state, and when the drawer plug is just in contact with the plug base, A1-① and A1-②, and A6-① and A6-② remain in the on state, the positive A1-① and B1-③, and A1-② and B1-④ are in the on state, and the negative A6-② and B6-④, and A6-② and B6-④ are in the on state, and when the plug is fully inserted into the plug base, the positive A1-① and B1-③, A1-② and B1-④, the negative A6-② and B6-④, and A6-② and B6-④ remain in the on state, and A1-① and A1-②, and A6-① and A6-② are disconnected, at which time the sensing element CT is completely connected to the insulation collection monitoring. When the sensing element fails or the insulation monitoring device is replaced, the integrated drawer is pulled out, and A1-① and A1-②, and A6-① and A6-② are preferentially connected during the process of pulling out the drawer plug, and after the plug is completely pulled out, A1-① and A1-②, and A6-① and A6-② remain in the on state, the positive A1-① and B1-③, and A1-② and B1-④ are disconnected, the negative A6-② and B6-④, and A6-② and B6-④ are disconnected, and the sensing element CT is completely disconnected from the operating feeder branch, so that the sensing element of the feeder branch can be replaced without power interruption.

[0041] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the present application still fall within the protection scope of the present application.

Claims

1. A DC feeder screen, characterized in that A set of integrated module for the DC insulation monitoring device, which can be replaced without power interruption, is installed in the DC feeder panel. This module controls the insertion and removal of the feeder branch output circuit, the acquisition sensing element and its circuit. When the integrated module is removed, the empty branch output circuit in the air plug is automatically shorted to ensure uninterrupted power supply to the branch. When the integrated module is inserted, the acquisition sensing element is automatically connected. The DC feeder panel includes multiple DC output branches. The front cabinet of the DC feeder panel is equipped with multiple DC circuit breakers, an insulation monitoring device, and a DC bus voltmeter. The rear cabinet of the DC feeder panel is equipped with a DC busbar, multiple acquisition and monitoring modules of the insulation monitoring device, and multiple integrated modules of aviation plug and drawer. Each acquisition and monitoring module is connected to multiple feeder branches, and each integrated module of aviation plug and drawer collects data from multiple feeder branches. The integrated module for the aircraft plug and drawer, as well as the data acquisition and monitoring module, are installed on the horizontal panel of the bracket inside the DC feeder panel. The DC feeder panel also includes 48 DC output branches. The front cabinet of the DC feeder panel is equipped with 48 DC circuit breakers, an insulation monitoring device, and a DC bus voltmeter. The rear cabinet of the DC feeder panel is equipped with a DC busbar, 5 acquisition and monitoring modules of the insulation monitoring device, and 10 integrated modules of aviation plug and drawer. Each acquisition and monitoring module is connected to 8 to 16 feeder branches, and each integrated module of aviation plug and drawer is connected to 5 feeder branches. An integrated module for both the connector and drawer includes a connector A component with multiple circuit breaker output branches, a connector B component, and a sensor CT integrated drawer and slot. The integrated drawer includes the connector B component, the sensor CT component, and the integrated drawer. The connector B component and the sensor CT component are integrated and mounted on the integrated drawer. The connector A component is the connector base, and the connector B component is the connector plug. The connector B component enables sensor access control. The connector B component and the connector A component are connected in conjunction. The bottom of the integrated drawer is equipped with a slide rail, and the bottom surface of the slot is equipped with a track. The integrated drawer can be plugged in and out by sliding the slide rail and the track, so as to facilitate the replacement of the internal sensor components. The slot box includes a slot box upper cover plate, a slot box left side plate, a slot box right side plate and a slot box lower bottom plate, the slot box lower bottom plate is an open structure without sealing, the slot box left side plate and the slot box right side plate are fixedly installed on the horizontal row panel of the DC feeder screen inner support, the slot box upper cover plate is connected with the slot box left side plate and the slot box right side plate through a live buckle structure, so as to facilitate the extraction of the slot box upper cover plate to check the plug-in base and related wiring; the plug-in base is installed on the horizontal row panel at the rear side of the slot box, the rear side of the horizontal row panel has a wiring leading-out space, the plug-in base terminal leads out wiring, and the other end of the wiring is connected with the air switch and the terminal row of the feeder branch; the slot box lower bottom plate is provided with a track matched with the integrated drawer bottom slide rail to realize the plug-in function of the integrated drawer; the slot box right side plate is provided with a sensing element signal acquisition and power terminal row, the inside of the terminal row is connected with the sensing element through a prefabricated plug, and the outside of the terminal row is connected with the acquisition monitoring module through wiring and is connected into the insulation monitoring device.

2. A DC feeder screen according to claim 1, characterized in that The installation panels of the DC air switch, the insulation monitoring device and the DC bus voltage meter all adopt front opening type cabinet doors.

3. A DC feeder screen according to claim 1, characterized in that The integrated drawer is provided with a redundant structure design to reserve space for the installation and arrangement of sensing elements of insulation monitoring devices of other manufacturers.

4. A DC feeder screen according to claim 1, characterized in that The plug-in A component and the plug-in B component are provided with a connecting pressure buckle, the connecting pressure buckle is pressed when the integrated drawer is inserted and is released when the integrated drawer is pulled out, so as to ensure the reliable pressure connection between the plug-in A component and the plug-in B component.

5. A DC feeder screen according to claim 1, characterized in that The plug-in A component, i.e. the plug-in socket, includes 10 wiring terminals A1-A10, and all the terminal wiring is arranged through the rear side of the horizontal row panel; the ① end of all the wiring terminals A1-A10 is connected with the positive and negative output wiring of the lower end of the 101Z-105Z feeder air switch, and the ② end of all the wiring terminals A1-A10 is connected with the positive and negative wiring of the 101Z-105Z feeder branch of the DC feeder screen terminal row; in order to prevent the positive and negative terminal wiring from being short-circuited in operation, the positive and negative terminal wiring is arranged separately, the ① and ② ends of A1-A5 are respectively connected with the positive output of the lower end of the 101Z-105Z feeder air switch and the terminal row 101Z-105Z feeder branch, and the ① and ② ends of A6-A10 are respectively connected with the negative output of the lower end of the 101Z-105Z feeder air switch and the terminal row 101Z-105Z feeder branch; before the plug of the plug-in B component is inserted into the base of the plug-in A component, the terminals between A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-②, and A10-① and A10-② are in conduction, and after the plug of the plug-in B component is completely inserted into the base of the plug-in A component, the terminals between A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-②, and A10-① and A10-② are disconnected.

6. A DC feeder screen according to claim 1, characterized in that The navigation plug B component, namely the navigation plug plug, includes 10 connection terminals B1-B10. The terminals ③ and ④ of the plug B1-B10 are not conductive. The positive and negative terminals are arranged separately. The positive terminal of the sensing element CT1 of the 101Z feeder branch is connected to the terminals ③ and ④ of B1. The negative terminal of the sensing element CT1 of the 101Z feeder branch is connected to the terminals ③ and ④ of B6. The terminal ③ is connected to the CT polarity terminal, and the terminal ④ is connected to the CT non-polarity terminal. When the plug of the navigation plug B component is just inserted into the base of the navigation plug A component, A1-① and B1-③, A1-② and B1-④, A2-① and B2-③, A2-② and B2-④, A3-① and B3-③, A3-② and B3-④, A4-① and B4-③, A4-② and B4-④, A5-① and B5-③, A5-② and B5-④, A6-① and B6-③, A6-② and B6-④, A7-① and B7-③, A7-② and B7-④, A8-① and B8-③, A8-② and B8-④, A9-① and B9-③, A9-② and B9-④, A10-① and B10-③, and A10-② and B10-④ are connected. After the plug of the navigation plug B component is completely inserted into the base of the navigation plug A component, while the above terminals are continuously connected, the terminals A1-① and A1-②, A2-① and A2-②, A3-① and A3-②, A4-① and A4-②, A5-① and A5-②, A6-① and A6-②, A7-① and A7-②, A8-① and A8-②, A9-① and A9-②, and A10-① and A10-② are disconnected. At this time, the 101Z-105Z feeder air opening output loop is connected in series to the CT1-CT5 sensing elements.

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