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Novel high-power coefficient rectification and electric furnace transformer

A high power factor, electric furnace transformer technology, applied in transformers, variable transformers, inductors, etc., can solve the problems of complex insulation structure, large structural impedance, multi-cost, etc., to achieve energy saving, high power factor, and reduce reactive power. The effect of compensating costs

Pending Publication Date: 2017-12-22
孙崇山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Generally, the electromagnetic theory of transformers believes that if an idle winding is placed between two windings or there is an idle line segment in the winding, the eddy current loss of the winding will increase by more than three times, and the insulation structure will be complicated due to electric field distortion, and the cost will be greatly increased due to the winding arrangement structure.
The impedance of this structure is large, and the cost of adjusting the impedance increases too much, because the main air channel is generally more than 3 times the normal one. It is very clear to refer to the calculation principle of the mid-level impedance of the forward and reverse transformer voltage
When the voltage regulating winding is in operation, there are either idle windings or idle line segments. Generally, the loss of the voltage regulating winding accounts for 15% of the load loss of the transformer, and the eddy current loss accounts for 5%-10%. Increase, increase the transformer load loss by more than 10%

Method used

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  • Novel high-power coefficient rectification and electric furnace transformer
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  • Novel high-power coefficient rectification and electric furnace transformer

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0088] Example 1. A certain enterprise, traditional rectifier transformer, 6000 tons of electrolytic manganese project, about ZHSSPZ-5900 / 35 traditional rectifier transformer, DC current voltage regulation range 65%Udn-105%Udn, transformer high voltage voltage 35KV, positive and negative voltage regulation 35 files. The rectifier circuit is a diode bridge with the same phase and anti-parallel connection.

[0089] Minimum tap (highest low voltage) Uk=8%.

[0090] The rated tap (low voltage intermediate gear) Uk is unknown, estimated to be around 12%.

[0091]The maximum tap (the lowest low-voltage voltage) Uk=unknown, estimated at about 20%.

[0092] Because it was not designed by the inventor, the original traditional equipment and some technical data are unknown, and the technical effect electrolysis consumes about 6150 degrees of electricity per ton of manganese.

example 2

[0093] Example 2. A certain company (the same company as Example 1), new type rectifier transformer, 10,000 tons of electrolytic manganese project, ZHSSPZ-7600 / 35 new type rectifier transformer, DC current 25,000A, DC voltage 160V-260V, tank voltage about 4.5V, voltage regulation The range is 61.5%Udn—105%Udn, the high voltage voltage of the transformer is 35KV, the low voltage voltage of the transformer is 211V, and there are 35 levels of positive and negative voltage regulation. The rectifier circuit is a diode bridge with the same phase and anti-parallel connection. For the convenience of observing the test effect, there is no interference of the phase control angle.

[0094] The order of winding arrangement from inside to outside is: transformer core, primary winding, voltage regulating winding, secondary winding, such as figure 1 .

[0095] After calculation, the impedance voltage of each tap is:

[0096] Minimum tap (highest low voltage) Uk=6.07%.

[0097] Rated tap ...

example 3

[0102] Example 3. Traditional HSSPZ-12500 / 35 electric arc furnace transformer, three-phase, 50HZ, Yd11, primary voltage 35KV, secondary voltage 314V-116V, 19-level voltage regulation, 35KV compensation capacitor is installed on the primary winding, and the power factors before compensation are respectively Minimum COSφ 1 =0.55 and max COSφ 2 =0.75. The power factor after compensation is COSφ3=0.95.

[0103] Compensation capacitor maximum capacity Qc=12500×(tgφ 1 -tgφ 3 )=12500×(1.333-0.3287)=12558KVA.

[0104] The minimum capacity of the compensation capacitor Qc=12500×(tgφ 2 -tgφ 3 )=12500×(0.8819-0.3287)=6915KVA.

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Abstract

The invention provides a novel high-power coefficient rectification and electric furnace transformer. The novel high-power coefficient rectification and electric furnace transformer is a variable-capacity voltage regulating transformer provided with an independent voltage regulating winding, is applied to power systems in the industries of rectification, alternating-direct current smelting, electric heating equipment and the like, is a transformer of which the technical requirement is that the voltage regulating range is large and has the advantages that resistance voltage values of all voltage regulating gears are very small in dispersibility in the voltage regulating range, so that the power system has the advantages of being high in power coefficient, saving energy, increasing the yield and reducing reactive compensation cost, and the transformer has a particularly obvious energy saving effect on chemical electrolysis and direct current smelting.

Description

technical field [0001] The invention is a novel rectifier and electric furnace transformer. It is a variable-capacity voltage-regulating transformer with independent voltage-regulating windings, which is used in power systems in industries such as rectification, AC-DC smelting, and electric heating equipment. It is a transformer that requires a large range of voltage regulation. It has the characteristics of extremely small divergence of the impedance voltage value of all voltage regulation gears within the voltage regulation range, so that the power system has high power factor, energy saving, increased production, and reduced reactive power. Technical effects of compensating costs. Especially for chemical electrolysis and DC smelting, the energy saving effect is extremely remarkable. Background technique [0002] In the large-scale electrochemical industry and DC smelting industry, the DC power supply system and the transformer of the AC smelting electric furnace system ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F38/00H01F29/00
CPCH01F27/28H01F29/00H01F38/00
Inventor 孙崇山
Owner 孙崇山