Electrical cabinet for motor control
An electrical cabinet and electrical connection technology, applied in the field of electrical cabinets, can solve the problems of complex structure, low power density, and inconvenient transportation of electrical cabinets, and achieve the effects of easy transportation, installation and maintenance, high power density, and compact structure.
Pending Publication Date: 2022-04-01
YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD
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- Application Information
AI Technical Summary
Problems solved by technology
In the process of field application, limited by the size of the layout space, problems of inconvenient transportation, difficult installation and difficult operation and maintenance are often encountered
In addition, most of the existing grid-connected cabinets use a structure in which a single main circuit breaker is connected to a contactor, and the contactor may be a single contactor or a parallel contactor structure
This results in a low power density at a relatively high cost
Generally speaking, the structure of the existing electrical cabinet is complex and the modularization rate is low
Method used
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[0023] In the following description, the present invention is described with reference to various examples. One skilled in the art will recognize, however, that the various embodiments may be practiced without one or more of the specific details, or with other alternative and / or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail so as not to obscure the inventive concepts of the present invention. Similarly, for purposes of explanation, specific quantities, materials and configurations are set forth in order to provide a thorough understanding of embodiments of the invention. However, the invention is not limited to these specific details. Furthermore, it should be understood that the embodiments shown in the drawings are illustrative representations and are not necessarily drawn to correct scale.
[0024] In this specification, reference to "one embodiment" or "the embodiment...
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The invention discloses an electrical cabinet for motor control, which adopts a multi-parallel structure layout and comprises a main fuse, at least two circuit breakers and at least two contactors. Wherein the first end of the main fuse is electrically connected to the power conversion device, and the second end of the main fuse is electrically connected to the second end of the circuit breaker through the first conductor. The circuit breakers are of a parallel structure, the first end of each circuit breaker is electrically connected to the power grid through a second conductor, and the second end of each circuit breaker is electrically connected to the second end of the contactor through a third conductor. The contactors also adopt a parallel structure, and the first end of each contactor is electrically connected to the generator stator through a fourth conductor.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to an electric cabinet used for motor control. Background technique [0002] The electrical cabinet is usually a closed or semi-closed metal cabinet, which is used to meet the requirements of the normal operation of the power system. It is usually assembled with switchgear, measuring instruments, protective electrical and auxiliary equipment, etc. in accordance with the requirements of electrical wiring. In technical fields such as wind power generation, it is usually necessary to connect an electrical cabinet between the generator and the mains line to control the grid connection of the generator's power output to the mains line (that is, the input of the generated electric energy to the grid) so that To supply power to electricity consumers and to disconnect generators from the utility line. [0003] Existing electrical cabinets for motor control are usually composed of...
Claims
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IPC IPC(8): H02J3/38H02P9/00H02B1/24H02B1/04
CPCY02E10/76Y02P80/20
Inventor 龚金云邓承宇郭钦鑫牛瑞根
Owner YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD