An Ultra-high-power Electric Arc Furnace Model for Low-Frequency Non-stationary Inter-harmonics Studies

doi:10.11930/j.issn.1004-9649.202006170

Abstract

Abstract: Ultra-high-power electric arc furnace is the main equipment of modern smelting, but its low-frequency non-stationary inter-harmonics and high-power impact will seriously affect the power quality of distribution networks. The accurate modeling of ultra-high-power electric arc furnace is of great significance to understand the time-varying and non-linear characteristics of the arc and to conduct the targeted research on power quality issues. Aiming at the problem that the existing models have not considered the low-frequency non-stationary inter-harmonic emission characteristics, a novel ultra-high power electric arc furnace model is established. Firstly, a static arc equation is established according to the law of conservation of energy, and a dynamic mathematical model is constructed for the ultra-high-power electric arc furnace using chaos theory. Then, the genetic ant colony algorithm is used to identify the parameters of the dynamic mathematical model. Finally, a 100 t AC electric arc furnace in Fujian was used for case study, and the feasibility of the proposed model was verified under Matlab/Simulink environment. The simulation results show that the proposed model can better describe the operating characteristics of the ultra-high-power electric arc furnace, and can be used for study of the low-frequency non-stationary inter-harmonic emission characteristics of the ultra-high-power electric arc furnace.

Key words: ultra-high-power electric arc furnace, low-frequency non-stationary inter-harmonics, mathematical model, simulation model, emission characteristics

LIN Caihua, ZHANG Yi, SHAO Zhenguo, LIN Fang, HUANG Daoshan, LIN Yan. An Ultra-high-power Electric Arc Furnace Model for Low-Frequency Non-stationary Inter-harmonics Studies[J]. Electric Power, 2020, 53(11): 1-8.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202006170

https://www.electricpower.com.cn/EN/Y2020/V53/I11/1

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