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Harmonic suppression apparatus of ore furnace

A harmonic suppression and submerged arc furnace technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, lighting and heating equipment, etc., can solve transformer copper loss, large reactive power loss, and power consumption Large and other problems, to achieve the effect of improving power factor, improving product quality and prolonging service life

Inactive Publication Date: 2009-01-07
西安瑞驰电力设备有限公司
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Problems solved by technology

Although this method can achieve the purpose of compensating the power factor of the power grid and improve the power factor displayed by the meter at the metering point, the large amount of reactive power consumption on the secondary side has not been improved, resulting in unsatisfactory comprehensive parameters of the submerged arc furnace.
There are disadvantages such as large reactive power loss, large three-phase unbalance coefficient, low electrical efficiency, large power consumption, serious transformer copper loss, and serious line loss.

Method used

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  • Harmonic suppression apparatus of ore furnace

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Embodiment Construction

[0022] According to the concrete structure of the submerged arc furnace, the present invention arranges the compensation capacitor in parallel near the copper tile, makes the reactive power compensation as close as possible to the electric arc, and compensates the transformer's secondary reactance, leakage reactance and short network impedance. Automatic control technology is used to detect the reactive power of each phase, and according to the size of the reactive power and the control model that the three-phase power is equal, a corresponding size of reactive capacitor is set to convert the reactive power into active power. This system can not only improve the power factor, but also balance the three-phase power, make the power center, thermal center, and furnace cavity center of the submerged arc furnace coincide, and increase the smelting power on the electrode under the condition that the primary side power of the transformer remains unchanged. , to achieve the purpose of ...

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Abstract

The invention relates to a harmonic suppression device of a submerged arc furnace and comprises a three-phase compensation circuit which is respectively connected with a secondary side of a furnace transformer through a short network of a compensation system; wherein, the short network of the compensation system is serially connected with a quick fuse and a reactance; each phase of the three-phase compensation circuit comprises a capacitor which is connected with the short network of the compensation system by a link lead to form a static compensator. The device can greatly reduce the influences of harmonics and improves the production efficiency.

Description

technical field [0001] The invention relates to a harmonic suppressing device for a submerged arc furnace. Background technique [0002] The submerged arc furnace is an industrial electric furnace that consumes a lot of power. It mainly produces ferro-silicon, ferro-manganese, ferro-chromium, ferro-tungsten, silicon-manganese alloy and other ferroalloys. According to the structural characteristics and working characteristics of the submerged arc furnace, 70% of the system reactance of the submerged arc furnace is generated by the short network system, and the short network is a high-current working system, and the maximum current can reach tens of thousands of amperes. Therefore, the short network The performance of the submerged arc furnace determines the performance of the submerged arc furnace. It is for this reason that the natural power factor of the submerged arc furnace is difficult to reach more than 0.85. The natural power factor of most furnaces is between 0.7 and ...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/18F27B3/00
CPCY02E40/30Y02E40/40
Inventor 白玉龙
Owner 西安瑞驰电力设备有限公司
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