Using the constant current ‒ constant voltage converters to effectively reduce voltage fluctuations in the power supply systems for electric arc furnaces
| Autor: | Volodymyr Turkovskyi, Anton Malinovskyi, Andrii Muzychak, Olexandr Turkovskyi |
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| Rok vydání: | 2020 |
| Předmět: |
electric arc furnace
Mains electricity 020209 energy 0211 other engineering and technologies Energy Engineering and Power Technology 02 engineering and technology Industrial and Manufacturing Engineering Automotive engineering law.invention Electric power system voltage fluctuations law Management of Technology and Innovation 021105 building & construction 0202 electrical engineering electronic engineering information engineering T1-995 Industry Electrical and Electronic Engineering Transformer Technology (General) Electric arc furnace business.industry Applied Mathematics Mechanical Engineering reducing the flicker dose AC power HD2321-4730.9 Computer Science Applications electricity quality Control and Systems Engineering Environmental science Constant current Electricity business Voltage |
| Zdroj: | Eastern-European Journal of Enterprise Technologies, Vol 6, Iss 8 (108), Pp 54-63 (2020) |
| ISSN: | 1729-4061 1729-3774 |
| DOI: | 10.15587/1729-4061.2020.219439 |
| Popis: | AC electric arc furnaces (EAFs) are among the most common technological units for making high-quality steel. The use of furnaces is promising in the future as the production volumes of electric steel increase. These furnaces are powerful electrical installations exposed to the dynamic, asymmetrical, and nonlinear load, which adversely affects the quality indicators of electricity supply. Typically, this negative impact is reduced by connecting EAFs to high power energy systems or, in most cases, by applying different types of static reactive power compensators. Such approaches require considerable investment in the development of the power system or in the equipment of compensatory installations whose rated capacity is severaltimes higher than the capacity of the furnace transformer. These approaches aim to reduce the effects of negative impact. It is possible to achieve the greater effect of limiting the negative impact, at smaller investments, by using an alternative approach that aims directly at the source of the negative impact. The approach implementation implies forming an external characteristic of the EAF power supply. The characteristic should be rigid in current in the region of furnace operating modes from operational short circuit to the rated load. In the region of modes from the rated load to idling, this characteristic should be rigid in voltage. Underlying the formation of this characteristic is a resonance converter, which ensures almost a stable value of the arc current under the furnace operating modes. This study has confirmed the significant benefits of the proposed approach, which proves more effective in improving the quality of electricity in the network. This makes it possible to use EAFs in smaller power systems and ensure the development of the industry at a lower investment |
| Databáze: | OpenAIRE |
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