Integrated 10kV alternating current input direct current output equipment

Abstract

The utility model relates to the field of direct-current output equipment, in particular to integrated 10kV alternating-current input direct-current output equipment, which comprises a medium-voltage cabinet, a transformer cabinet, two groups of rectifier cabinets and a monitoring unit, the medium-voltage cabinet, the transformer cabinet and the rectifier cabinets are sequentially and horizontally arranged, the number of the rectifier cabinets is two, and the monitoring unit is arranged in the rectifier cabinets. According to the utility model, the alternating current input circuit breaker and the direct current output circuit breaker are integrated in the rectifier cabinet, the upper layer space, the middle layer space and the lower layer space of the cabinet body are fully utilized, compared with a traditional rectifier cabinet, the alternating current input rectifier cabinet, the alternating current rectifier cabinet and the alternating current output rectifier cabinet are configured as independent cabinets, and the occupied area is smaller.

Description

Technical Field

[0001] The utility model relates to the field of direct current output equipment, in particular to a direct current output equipment with an integrated 10kV alternating current input. Background Art

[0002] AC needs to be rectified and boosted to convert into DC before being invertered to generate electricity off-grid or on-grid. Due to the large conduction loss and conversion loss of large current rectification, and the difficulty in handling high-frequency ripple current, the conversion efficiency of DC with a high boost ratio is low.

[0003] This utility model patent focuses on solving the problem of direct input of 10kV AC and large-capacity rectification into DC power, and has great application significance for places such as data centers where DC power consumption is concentrated.

[0004] Based on this, the utility model designs an integrated 10kV AC input DC output device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an integrated 10kV AC input DC output device to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an integrated 10kV AC input DC output device, comprising a medium voltage cabinet, a transformer cabinet, a rectifier cabinet and a monitoring unit, wherein the medium voltage cabinet, the transformer cabinet and the rectifier cabinet are arranged horizontally in sequence, and there are two groups of rectifier cabinets. The monitoring unit is arranged in the rectifier cabinet, and bottom channel steel is provided on the lower sides of the medium voltage cabinet, the transformer cabinet and the rectifier cabinet.

[0007] Preferably, the medium voltage cabinet includes a vacuum circuit breaker, a lightning arrester, a current transformer, a voltage transformer, a grounding switch and a control system.

[0008] Preferably, the transformer cabinet includes a primary winding, a secondary winding, an iron core and a fixing component.

[0009] Preferably, the rectifier cabinet includes an input switch, a rectifier module, an output switch and a monitoring unit.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention integrates the AC input and DC output circuit breakers in the rectifier cabinet, making full use of the upper, middle and lower space of the cabinet. Compared with the traditional rectifier cabinet, the AC input, rectifier cabinet and output cabinet are configured as independent cabinets, which occupies a smaller area. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the utility model embodiments, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the bottom channel steel structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the medium voltage cabinet of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the rectifier cabinet of the utility model.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0017] 1-Medium voltage cabinet, 11-Vacuum circuit breaker, 12-Lightning arrester, 13-Current transformer, 14-Voltage transformer, 15-Earthing switch, 2-Transformer cabinet, 21-Primary winding, 22-Secondary winding, 23-Fixed component, 24-Iron core, 3-Rectifier cabinet, 31-Input switch, 32-Rectifier module, 33-Output switch, 4-Monitoring unit, 5-Bottom channel steel. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Combination Figure 1-4 :

[0020] An integrated 10kV AC input DC output device comprises a medium voltage cabinet 1, a transformer cabinet 2, a rectifier cabinet 3 and a monitoring unit 4. The medium voltage cabinet 1, the transformer cabinet 2 and the rectifier cabinet 3 are arranged horizontally in sequence. There are two groups of rectifier cabinets 3. The monitoring unit 4 is arranged in the rectifier cabinet 3. Bottom channel steel 5 is provided on the lower sides of the medium voltage cabinet 1, the transformer cabinet 2 and the rectifier cabinet 3.

[0021] Furthermore, the medium voltage cabinet 1 includes a vacuum circuit breaker 11, a lightning arrester 12, a current transformer 13, a voltage transformer 14, a grounding switch 15 and a control system.

[0022] Furthermore, the transformer cabinet 2 includes a primary winding 21 , a secondary winding 22 , an iron core 24 and a fixing component 23 .

[0023] Furthermore, the rectifier cabinet 3 includes an input switch 31 , a rectifier module 32 , an output switch 33 and a monitoring unit 4 .

[0024] Specific application examples of the utility model:

[0025] 10kV AC is introduced from the feeder cabinet of the switch station into the medium voltage cabinet of the utility model device, and the medium voltage cabinet is used as the main switch of the 10kV line to protect all loads at the lower end. After the medium voltage cabinet is connected, the 10kV current enters from the primary winding of the transformer (high voltage side), and generates 240V AC in the secondary winding (low voltage side) through the principle of electromagnetic induction (if a traditional dry-type transformer is used, the secondary current is 380V, and an active filter cabinet and an AC input cabinet are required). Because the secondary winding is multi-channel, the high-order harmonics of the secondary winding are decomposed by moving the phase sequence angle, thereby offsetting most of the harmonics, so that the entire system does not need to add active filtering equipment. Each winding passes through the input switch, the rectifier module, and is collected on the same DC bus. At this time, the output voltage of the rectifier module can be adjusted according to the actual load requirements to obtain the required DC voltage (nominal voltage 240V DC or 336V DC, etc.) and then the DC output switch is configured according to the number and amperage of the output circuits of the actual load as the output protection of the circuit. The monitoring unit on the rectifier cabinet will collect the electrical parameters and switch status of the input switch, rectifier module and output switch, and monitor and protect the safe operation of the rectifier cabinet in real time. The medium voltage cabinet, transformer cabinet, and rectifier cabinet are all equipped with digital communication functions, and data can be uploaded to the monitoring system of this equipment through RS485 or Ethernet interface for operation and maintenance personnel to view.

[0026] 10kV high-voltage AC direct input, compared with traditional low-voltage rectification, has higher voltage and larger capacity; saves floor space, this utility model patent integrates both AC input and DC output circuit breakers in the rectifier cabinet, fully utilizes the upper, middle and lower space of the cabinet, and configures the AC input, rectifier cabinet, and output cabinet as independent cabinets compared to traditional rectifier cabinets, which occupies a smaller floor space; the rectifier circuit is short and the energy efficiency is higher. Compared with traditional rectifier cabinets, from AC power-rectifier module-DC output, this utility model patent uses fewer cables, and the DC output part directly replaces traditional cables with copper bars, which has higher energy transmission efficiency; module integrated installation. This utility model patent centrally installs 10kV switch cabinet, transformer cabinet, and rectifier cabinet on the channel steel base. The factory has completed the commissioning, the whole group is transported, hoisted, and the on-site direct wiring is sufficient. Compared with the traditional rectifier cabinet installation, it is more convenient and shortens the construction period.

[0027] Medium voltage cabinet: It is composed of vacuum circuit breaker, lightning arrester, current transformer, voltage transformer, grounding switch and control system. The medium voltage cabinet integrates measurement, protection and control, and protects the load at the lower end.

[0028] Transformer cabinet: It is composed of primary winding, iron core coil, secondary winding and fixing parts. Its function is to convert 10kV AC into low-voltage AC with multiple windings and different phase sequences. The secondary loads with multiple windings and different phase sequences are decomposed from each other, which can eliminate most harmonics and replace the traditional filtering function (if a traditional dry-type transformer is used, an active filter cabinet needs to be added)

[0029] Rectifier cabinet: It is composed of input switch, rectifier module, output switch, monitoring unit, etc. The input and output switches act as protection circuits. The rectifier module converts AC power into the required DC power. The control unit is used to control the mutual cooperation between multiple groups of rectifier modules. When the load fluctuates or the module is abnormal, it is used to adjust the power changes of multiple groups of rectifier modules to maintain the balance of the rectifier cabinet system. The rectifier cabinet also has the function of monitoring the battery status.

[0030] In the description of the utility model, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] In the utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0032] Although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated 10kV AC input DC output device, characterized in that: The invention comprises a medium voltage cabinet (1), a transformer cabinet (2), a rectifier cabinet (3) and a monitoring unit (4), wherein the medium voltage cabinet (1), the transformer cabinet (2) and the rectifier cabinet (3) are arranged horizontally in sequence, the rectifier cabinets (3) are provided in two groups, the monitoring unit (4) is arranged in the rectifier cabinet (3), and bottom channel steels (5) are provided at the lower sides of the medium voltage cabinet (1), the transformer cabinet (2) and the rectifier cabinet (3).

2. The integrated 10kV AC input DC output device according to claim 1, characterized in that: The medium voltage cabinet (1) comprises a vacuum circuit breaker (11), a lightning arrester (12), a current transformer (13), a voltage transformer (14), a grounding switch (15) and a control system.

3. The integrated 10kV AC input DC output device according to claim 1, characterized in that: The transformer cabinet (2) comprises a primary winding (21), a secondary winding (22), an iron core (24) and a fixing component (23).

4. The integrated 10kV AC input DC output device according to claim 1, characterized in that: The rectifier cabinet (3) comprises an input switch (31), a rectifier module (32), an output switch (33) and a monitoring unit (4).

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