Design and implementation of a hybrid system for the mitigation of PQ problems of medium frequency induction steel melting furnaces

2015-10-18
Yılmaz, İlker
Durna, Emre
Ermiş, Muammer
This paper describes a hybrid system for the mitigation of Power Quality (PQ) problems of medium-frequency coreless induction steel melting furnaces. The hybrid system is composed of passive shunt detuned filters and a Hybrid Active Power Filter (HAPF). Since the single-phase load-resonant thyristor inverter of the work coil operates at variable frequency and supplied from a multi-pulse thyristor rectifier, interharmonic current components, due to cross-modulation phenomenon across ac-dc-ac link, appear in supply lines. The frequencies of these interharmonics are migrating in time over a wide range and they interact with passive shunt LC filters and other power system components resulting in harmful effects on the overall system. Reactive power compensation of medium-frequency coreless induction steel melting furnace is achieved by passive shunt detuned filter banks thus avoiding the amplification risk of interharmonic current components. Interharmonics are satisfactorily suppressed by a HAPF with K control strategy. The performance of controller is improved by modifying the conventional K control strategy and adding feedforward control loops for dominant characteristic harmonics. The resulting hybrid system is operating in a steel melt shop successfully since March, 2013.
2015 IEEE Industry Applications Society Annual Meeting (18 - 22 Ekim 2015)

Suggestions

Design and Implementation of a Hybrid System for the Mitigation of PQ Problems of Medium-Frequency Induction Steel-Melting Furnaces
Yilmaz, Ilker; Durna, Emre; Ermiş, Muammer (2016-05-01)
This paper describes a hybrid system for the mitigation of power quality (PQ) problems of medium-frequency coreless induction steel-melting furnaces. The hybrid system is composed of passive shunt-detuned filters and a hybrid active power filter (HAPF). Since the single-phase load-resonant thyristor inverter of the work coil operates at variable frequency and supplied from a multipulse thyristor rectifier, interharmonic current components, due to cross-modulation phenomenon across ac-dc-ac link, appear in s...
Suppression of Time-Varying Interharmonics Produced by Medium-Frequency Induction Melting Furnaces by a HAPF System
Durna, Emre; Yilmaz, Ilker; Ermiş, Muammer (2017-02-01)
This paper describes the design and field implementation of a hybrid active power filter (HAPF) system to suppress time-varying interharmonics injected into the grid by medium-frequency coreless induction melting furnaces (IMFs). In a sample steel melt shop, variable-frequency load-resonant inverters of works coils are supplied from the medium-voltage grid via 12- and 24-pulse thyristor rectifiers. The cross-modulation phenomenon in ac-dc-ac link of the medium-frequency coreless IMF installations produces i...
Field-Data-Based Modeling of Medium-Frequency Induction Melting Furnaces for Power Quality Studies
Yilmaz, Ilker; Salor, Ozgul; Ermiş, Muammer; Cadirci, Isik (2012-07-01)
In this paper, the coreless medium-frequency induction melting furnace (IMF) system is represented by alternative field-data-based models, developed specifically for power quality studies. The IMF operation has been represented by a variable series RL circuit, to model the fundamental components of electrical quantities, and a shunt-connected current source, to model the generated harmonics and interharmonics over a typical melting cycle. Both the sinusoidal coding method applied to the major harmonics and ...
Field-Data-Based Modeling of Medium Frequency Induction Melting Furnaces for Power Quality Studies
Yilmaz, Ilker; Salor, Ozgul; Ermiş, Muammer (2011-10-13)
In this paper, the coreless, medium frequency induction melting furnace (IMF) system, has been represented by alternative field-data-based models, developed specifically for power quality studies. The IMF operation has been represented by a variable series RL circuit to model the fundamental components of electrical quantities, and a shunt-connected current source, to model the generated harmonics and interharmonics over a typical melting cycle. Both the sinusoidal coding method applied to the major harmoni...
Optimization of conditions to produce manganese and iron carbides from Denizli-Tavas manganese ore by solid state reduction
Akıl, Cem; Geveci, Ahmet; Department of Metallurgical and Materials Engineering (2007)
Main purpose of this study was to find the optimum conditions to produce a charge material for ferromanganese production or steelmaking with high content of iron and manganese carbides from Denizli-Tavas manganese ore by carbothermic reduction and investigate the effects of temperature, time, amount of active carbon addition and CaO addition on this reduction. The ore was calcined and then mixed with active carbon and CaO. Experiments were performed in a horizontal tube furnace that can be heated up to 1700...
Citation Formats
İ. Yılmaz, E. Durna, and M. Ermiş, “Design and implementation of a hybrid system for the mitigation of PQ problems of medium frequency induction steel melting furnaces,” presented at the 2015 IEEE Industry Applications Society Annual Meeting (18 - 22 Ekim 2015), United States, 2015, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/73050.