Two-folded implementation of a 12-pulse TCR with dissimiliar transformers for a ladle furnace: Reactive power compensation and power system redundancy

Date

2004-10-07

Author

Kose, N
Mutluer, B
Ermiş, Muammer
Terciyanli, A
Gultekin, B
Bilgin, F
Ermis, C
Hasbay, S
Keyifli, M
Ahi, T

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

111
views

0
downloads

This paper is devoted to the design and implementation of a 12-pulse Thyristor Controlled Reactor (TCR) system, which constitutes a low-cost solution to the reactive power compensation problem of a ladle furnace in Iskenderun Iron & Steel Plant (ISDEMIR). Design objectives and elimination of 5(th) and 7(th) harmonic current components produced by 6-pulse TCRs are met by connecting two sets of 6 kV, 6 MVAr TCRs to the 34.5 kV ladle furnace bus by the use of two separate converter transformers with delta- and wye-connected secondaries. The effects of dissimilarities between the two sets of 6-pulse TCRs on the harmonic current content of the resulting 12-pulse TCR system are also presented in this paper. Both reactive power compensation and power system redundancy objectives are met by using two separate and dissimilar transformers instead of a single transformer with identical A-and Y-connected secondaries for connection to 6-pulse TCRs, resulting in a two-folded design. One of these transformers is chosen as a sufficiently large unit with two identical A-connected secondaries to supply the ladle furnace in emergency or during maintenance periods of main transformer. In normal operation mode of the resulting ladle furnace power system, the 12-pulse TCR implemented in the project gives quite satisfactory results in reactive power compensation and nearly meets harmonic standards currently used in the country.

Subject Keywords

Reactive power control, Harmonic elimination, Reactive power control, 12-Pulse TCR, Thyristor applications, Metal industry

URI

https://hdl.handle.net/11511/63054

Collections

Graduate School of Natural and Applied Sciences, Conference / Seminar

Suggestions

OpenMETU
Core

Power quality solutions for 12-pulse smelter converters in ETI Aluminium Works Ermiş, Muammer; Gultekin, B; Terciyanli, A; Nalcaci, E; Cadirci, I; Ozay, N; Ermis, C; Gokmen, M; Kiziltan, H (2003-10-16) This paper describes the solution of power quality problems arising from 12-pulse smelter converters in ETI Aluminium Works. The design work is based on practical data collected in the field as well as on the results of detailed simulation studies obtained by EMTDC/PSCAD, SPICE and MATLAB. Main design objective is to meet both present regulations and harmonic standards by using robust, reliable and cost effective systems with a long life expectancy. The shunt-connected passive reactive power compensation sy...
Evaluation of Photovoltaic Systems For Reactive Power Compensation In Low Voltage Power Systems Uğur, Mesut; Duymaz, Erencan; Göl, Murat; Keysan, Ozan (2018-10-25) The four-quadrant operation ability of photovoltaic (PV) inverters makes them promising candidates for reactive power compensation in low voltage systems. In this paper, utilization of PV inverters instead of conventional reactive power compensation units is evaluated. The use of PV inverters for reactive power compensation as well as active power supplying is investigated considering a real life system. The considered system suffers from low capacitive power factor due to the connected online UPS system. T...
Effects of main transformer replacement on the performance of an electric arc furnace system Akdag, A; Cadirci, I; Nalcaci, E; Ermiş, Muammer; Tadakuma, S (2000-03-01) In this paper, the effects of transformer replacement on the electric are furnace power system of an iron and steel plant have been investigated. The new operating strategy has been determined according to stable are and maximum productivity requirements. Based on these new operating conditions, the sufficiency of the existing flicker compensation system in terms of the load balancing, power-factor correction, and flicker have been examined. All investigations made in this work are supported by real-time me...
Design and implementation of a hybrid system for the mitigation of PQ problems of medium frequency induction steel melting furnaces Yılmaz, İlker; Durna, Emre; Ermiş, Muammer (2015-10-18) 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 ...
Development of CuNiSi-x alloy catenary parts by thermomechanical processing for railway applications Koç, Ömer Faruk; Kalkanlı, Ali; Department of Metallurgical and Materials Engineering (2017) Electrical conductivity together with some other mechanical properties like strength is needed for catenary systems in railway applications. In recent years, copper and its alloys especially the ones with Ni and Si which can mostly satisfy these mechanical needs are extensively researched. For this reason, uses of CuNiSi base alloys have become widespread. In the research study CuNiSi base alloys were put through several treatments to improve their properties. These treatments were basically melting and cas...

Citation Formats

N. Kose et al., “Two-folded implementation of a 12-pulse TCR with dissimiliar transformers for a ladle furnace: Reactive power compensation and power system redundancy,” 2004, p. 497, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63054.