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Alternative device and method for high-voltage electromagnetic voltage transformer in production plant

A voltage transformer, electromagnetic technology, applied in the field of high-voltage electrical measurement, can solve problems such as interruption of power supply in production plants, affecting production stability, and damage, saving spare parts costs, avoiding power supply system failures, and achieving good results.

Active Publication Date: 2018-03-30
MAANSHAN IRON & STEEL CO LTD
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  • Description
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Problems solved by technology

Similarly, as far as Maanshan Iron and Steel is concerned, several factory-level substations and high-voltage PT cabinets in the production plant are damaged due to ferromagnetic resonance overvoltage every year, and even high-voltage short-circuit blasts occur, resulting in sudden interruption of power supply in the production plant and long-term power outages. Seriously affect the stability of production

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  • Alternative device and method for high-voltage electromagnetic voltage transformer in production plant
  • Alternative device and method for high-voltage electromagnetic voltage transformer in production plant
  • Alternative device and method for high-voltage electromagnetic voltage transformer in production plant

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Embodiment Construction

[0013] Referring to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention include the shape, structure, mutual position and connection relationship of each part, the function and working principle of each part, and the manufacturing process of the various components involved. And the method of operation and use, etc., are described in further detail to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0014] The three-phase circuit wiring diagram of TV with Yn connection in the neutral point ungrounded system is shown in Figure 1(a) below. In the neutral point ungrounded power supply system, the primary winding is often connected to the busbar in a star connection. The electromagnetic high-voltage voltage transformer TV whose neutral point is grounded, Fig. 1(b) is its equivalent circuit diagram. ...

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Abstract

The invention discloses a substitution device of a manufacturing-plant high-voltage electromagnetic voltage transformer and a method thereof. A used transformer and a three-phase step-down transformer are included. The used transformer is connected to the three-phase step-down transformer through a used substation and feed switch type vacancy switch. A secondary winding of the three-phase step-down transformer is directly connected to an inlet wire terminal of a PT-cabinet high-voltage transformer relay control room. A scope of twice voltage reduction of the used transformer and the three-phase step-down transformer is the same with a scope of one voltage reduction of the high-voltage electromagnetic voltage transformer. The used transformer and a voltage measurement transformer are used to substitute the electromagnetic high-voltage transformer so that a problem of ferromagnetic-resonance overvoltage existing in electromagnetic high-voltage transformer usage is solved.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical measurement, and in particular relates to a replacement device and method for a high-voltage electromagnetic voltage transformer in a production plant. Background technique [0002] The high-voltage power supply of the production plant usually adopts 3, 6, 10KV neutral point ungrounded power supply system, that is, the factory-level substation provides 3, 6, 10KV high-voltage power supply to the high-voltage switch cabinet of the production plant through the secondary winding neutral point ungrounded transformer, For the neutral point ungrounded system, the primary winding is often connected to the busbar in a star connection, and the electromagnetic high-voltage voltage transformer (often placed in a high-voltage PT cabinet) whose neutral point is grounded is mainly used for voltage measurement of the high-voltage busbar. And relay protection (such as high-voltage busbar insulatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R15/18
CPCG01R15/18
Inventor 叶光平苏炜李怀迁徐洪谢谆芮德荣张明吴卫华
Owner MAANSHAN IRON & STEEL CO LTD
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