High power cycloconverter for mining applications: Practical recommendations for operation, protection and compensation

Aravena, Pablo; Morán, L.; Melo, Diógenes L.; Burgos, Rolando; Astudillo, Pablo; Olivares, Cristhian

doi:10.1109/ias.2013.6682572

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…Therefore, it can be expressed as yref_ua=m•sin(ωgt), where m is the modulation index of MMC. Combining ( 24) and (25), the rated capacitor voltage fluctuation ∆ucuaN can be obtained as (26).…”

Section: F Sm Capacitor Csm Of Mmcsmentioning

confidence: 99%

Cascaded Modular Multilevel Converter and Cycloconverter Based Machine Drive System

Zhang

Deng

Hou

et al. 2023

IEEE Trans. Ind. Electron.

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Section: F Sm Capacitor Csm Of Mmcsmentioning

confidence: 99%

Cascaded Modular Multilevel Converter and Cycloconverter Based Machine Drive System

Zhang

Deng

Hou

et al. 2023

IEEE Trans. Ind. Electron.

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“…Also, it is important to note that the capacitor ESR increases significantly at low frequencies, therefore capacitor losses are extremely high at low frequency components (i.e 100Hz, 200Hz and so on) [112]. The total power loss in the DC-link capacitor can be calculated by using RMS value of the capacitor harmonic current (I ch ) as given in (12).…”

Section: A Input Voltage Sag Undervoltage and Unbalancementioning

confidence: 99%

Power Quality Issues of Distorted and Weak Distribution Networks in Mining Industry: A Review

et al. 2019

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Mining is an important industry in many countries including Australia and plays a vital role in their economy. The industry heavily depends on electricity as it employs different types of electrical loads. Consequently, a stable and reliable supply of electricity is vital for running the production smoothly. In this review paper, electrical characteristics of mining power systems are described and common power quality and energy efficiency concerns in these systems are stated and classified. Different types of common power electronics topologies used in the industry are also studied and main requirements for reliable and robust operation of the system are categorized. A comprehensive case study to elaborate power quality challenges in mining distribution network is performed.INDEX TERMS Distorted grid, distribution network, energy efficiency, mining industry, power quality, power system robustness.

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“…The highest input displacement factor is reached when the output voltage is maximum and, therefore, the modulation index is equal to 1 [20], [21]. At low-modulation index operation (low load), higher values of reactive power are absorbed by the cycloconverter, whereas the active power absorbed by the cycloconverter increases and the reactive power decreases with a high modulation index [22]. The reactive power, Q, is estimated from the active power and the input displacement factor, The reactive power demand in stands F4, F5 and F6 is controlled by the active control of reactive power [23], [24].…”

Section: Power and Energy Demandmentioning

confidence: 99%

Dynamic Estimation of Electrical Demand in Hot Rolling Mills

Orcajo

Rodriguez

Ardura

et al. 2016

IEEE Trans. on Ind. Applicat.

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Abstract-This paper proposes a method capable of reproducing the particular operating conditions of a hot strip mill and predicting the evolution of the main electrical variables from both the characteristics of the steel to be milled and the specific features of the rolling mill. The method analyzes the load torque and the motor speed evolution in the stands of the roughing and finishing mill drives, according to the steel to be milled. In this study three types of carbon alloy steel are considered, thus involving dissimilar hardness characteristics. The main stands of the mill, the power network and the filter banks have been modeled. The relationship between the grade of steel and both the electrical demand and various power quality parameters is discussed. The results can be used as a part of an expert system for the automatic estimation of the electrical demand in a hot rolling mill.Index Terms-Electrical demand, finishing mill, hot rolling mill, power system harmonics, roughing mill, steel. I. INTRODUCTIONTEELMAKING is an energy-intensive process. Although the majority of energy is consumed by the upstream processes (e.g. blast furnaces, basic oxygen furnaces and electrical arc furnaces), the energy consumption in the downstream mills is far from insignificant. Out of the downstream processes, the hot rolling operation is certainly the largest consumer of energy, both in the form of fuel gas and electricity.The electrical consumption in the hot rolling operation is more than 70 kWh/ton. The main consumers are the rolling stands and the coilers. However, auxiliary equipment cannot be neglected because it represents 25% of the electrical energy [1], [2].

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High power cycloconverter for mining applications: Practical recommendations for operation, protection and compensation

Cited by 8 publications

References 6 publications

Cascaded Modular Multilevel Converter and Cycloconverter Based Machine Drive System

Cascaded Modular Multilevel Converter and Cycloconverter Based Machine Drive System

Power Quality Issues of Distorted and Weak Distribution Networks in Mining Industry: A Review

Dynamic Estimation of Electrical Demand in Hot Rolling Mills

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