End terminal on-load voltage regulation single-phase 220 kV high-impedance transformer

A high-impedance transformer and voltage regulation technology, applied in the field of transformers, can solve problems such as rising manufacturing costs, elimination of enterprises, and inability to fully satisfy power users, and achieve the effects of controllable oscillation potential, reasonable structure, and superior performance indicators

Active Publication Date: 2014-05-14
SHANDONG DACHI ELECTRIC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on the above reasons, if transformer equipment manufacturers do not adopt more advanced design concepts, not only will the manufacturing cost of products rise sharply, but sometimes they will not be able to fully meet the needs of power users. In the end, enterprises will compete in this brutal market economy. eliminated in

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  • End terminal on-load voltage regulation single-phase 220 kV high-impedance transformer
  • End terminal on-load voltage regulation single-phase 220 kV high-impedance transformer

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Embodiment Construction

[0014] Accompanying drawing is the specific embodiment of the present invention. Such as figure 1 , figure 2 As shown, this type of line-end on-load voltage regulation single-phase 220kV high-impedance transformer, the core structure of this type of transformer adopts a single-phase three-column structure, and its core columns are divided into one core main column 1 and two iron core side columns 2 , where the cross-sectional area of ​​the core side column 2 is 50% to 56% of the cross-sectional area of ​​the core main column 1. The specific value can be determined according to parameters such as no-load loss, no-load current, and noise. Two core side columns are 2 points On both sides of the main column 1 of the iron core, the main column 1 of the iron core is sequentially sleeved with a high-voltage winding 3, a medium-voltage winding 4 and a low-voltage winding 5, and one of the side columns 2 of the iron core is sequentially sleeved with an excitation winding 6 and Volta...

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Abstract

The invention relates to a transformer, in particular to an end terminal on-load voltage regulation single-phase 220 kV high-impedance transformer. The transformer comprises a main iron core column and side iron core columns, the main iron core column is sleeved with a high voltage winding, a medium voltage winding and a low voltage winding, one side iron core column is sleeved with an exciting winding and a voltage regulation winding, the end terminal of the high voltage winding is connected with the voltage regulation winding through a lead, the low voltage winding is connected with the exciting winding in parallel through a lead, and an on-load voltage regulation tap switch is arranged on one side of the side iron core column sleeved with the voltage regulation winding. The end terminal on-load voltage regulation single-phase 220 kV high-impedance transformer is reasonable in structure, enables the leads to be led conveniently, and is high in reliability, excellent in performance index, low and controllable in oscillatory potential of the suspension end of the voltage regulation winding and suitable for design of 145 kV-330 kV end terminal on-load voltage regulation single-phase high-impedance transformers, and the transformer can be safely and reliably operated in a power grid system with a high voltage neutral point indirectly grounded.

Description

(1) Technical field [0001] The invention relates to a transformer, in particular to a single-phase 220kV high-impedance transformer with on-load voltage regulation at the line end. (2) Background technology [0002] With the rapid development of the national economy, the power transmission network is becoming more and more complex. In order to ensure the safety and reliability of the power system during operation, power users have higher and higher requirements for transformer products. Sometimes limited by the geographical location of the energy center or load center, substations are often arranged in remote mountainous areas with poor transportation conditions. At this time, power users will put forward strict requirements on the transportation size and weight of transformer products. According to the conventional design method, The transformer product that could have been designed as a three-phase integrated type must be designed as a single-phase transformer due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F29/04H01F27/28H01F27/30H01F27/40H01F27/24
Inventor 董景义刘洁李西勇
Owner SHANDONG DACHI ELECTRIC
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