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Low-pressure side on-load tap changer

A voltage regulating transformer, low-voltage side technology, applied in the field of transformers, can solve problems such as difficulty in designing a feasible design scheme, large design limitations, and complex processes

Inactive Publication Date: 2009-04-08
JIANGSU HUAPENG TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The transformer also solves the problems of complex process, increased cost, large design limitations or difficulty in designing a feasible design solution when realizing low-voltage direct voltage regulation

Method used

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  • Low-pressure side on-load tap changer
  • Low-pressure side on-load tap changer

Examples

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Embodiment Construction

[0016] Such as figure 1 , as shown in Figure 2: a low-voltage side on-load tap-changing transformer, which has a main transformer 8 composed of a high-voltage coil 1 and a low-voltage coil 2, a voltage-regulating coil 3, a reactive switch 4, a reactor 5 and a parallel coil 6 and a voltage regulating transformer 10 composed of a series coil 7. A voltage regulating coil 3 is arranged between the low voltage coil 2 of the main transformer 8 and the iron core 9 , and the voltage regulating coil 3 is sleeved on the iron core 9 of the main transformer 8 . The voltage regulating coil 3 is tapped according to two gears to set the classification section. The two-gear classification section is a step-up gear "ten" and a step-down gear "one". The voltage regulating coil 3 is provided with 10 taps 12 , 11 . The four terminals P1-P4 of the coil of the reactor 5 are also respectively connected with the contacts of the reactive switch 4 . The primary side parallel coil 6 of the voltage r...

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Abstract

The invention provides a low-voltage side on-load tap changer, which is provided with a main transformer consisting of a high voltage coil and a low voltage coil, a voltage regulation coil, a reactance-typed switch, a reactor and a voltage regulation transformer consisting of a parallel coil and a serial coil. A voltage regulation coil is arranged between the low voltage coil of the main transformer and an iron core; the voltage regulation coil is provided with classification sections by two-crosspiece tapping; the voltage regulation coil is provided with 10 shunting taps which are respectively connected with the contacts of the reactance-typed switch; the reactance-typed coil is also connected with the contact of the reactance-typed switch; the parallel coil of the voltage regulation transformer is connected in parallel with the voltage regulation coil of the main transformer; the serial coil of the voltage regulation transformer is connected in series with the low voltage coil of the main transformer. The low-voltage side on-load tap changer has the advantages of reducing the insulation level of the voltage regulation coil of the transformer, reducing the current passing the reactance-typed switch and easily arranging the tapping turns which comply with the voltage precision.

Description

technical field [0001] The invention relates to a low-voltage side on-load voltage regulating transformer, which belongs to the technical field of transformers. Background technique [0002] In power systems, we use step-up and step-down transformers to transfer electrical energy from the power plant to the consumer. Due to the input or removal of the user's electrical equipment, the grid voltage often fluctuates, which affects the running electrical equipment. The solution is to use a voltage regulating transformer. When the voltage fluctuates, the gear of the transformer will be changed accordingly to ensure the voltage stability of the secondary side, thereby eliminating the influence of the grid voltage fluctuation on the running electrical equipment. In order to adapt to changes in the power grid more quickly, it is often necessary to increase the number of voltage regulation stages of the transformer to refine the voltage difference of each stage or directly set the v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F29/04H01F27/28
Inventor 陈琪李洪春宋云春芮鸿岗
Owner JIANGSU HUAPENG TRANSFORMER
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