Abstract
The electric arc furnace (EAF) contributes to almost one-third of the global iron and steel industry, and its harmonic pollution has drawn attention. An accurate EAF harmonic model is essential to evaluate the harmonic pollution of EAF. In this paper, a data-driven compartmental modeling method (DCMM) is proposed for the multi-mode EAF harmonic model. The proposed DCMM considers the coupling relationship among different frequencies of harmonics to enhance the modeling accuracy, meanwhile, the dimensions of the harmonic dataset are reduced to improve computational efficiency. Furthermore, the proposed DCMM is applicable to establish a multi-mode EAF harmonic model by dividing the multi-mode EAF harmonic dataset into several clusters corresponding to the different modes of the EAF smelting process. The performance evaluation results show that the proposed DCMM is adaptive in terms of establishing the multi-mode model, even if the data volumes, number of clusters, and sample distribution change significantly. Finally, a case study of EAF harmonic data is conducted to establish a multi-mode EAF harmonic model, showing that the proposed DCMM is effective and accurate in EAF modeling.
Highlights
The electric arc furnace (EAF) is a widely used device in the iron and steel industry and it injects harmonic current into the power system and produces harmonic voltage at the point of common coupling (PCC) [1]
This paper proposes the driven compartmental modeling method (DCMM) for the multi-mode EAF harmonic model
This paper has developed the DCMM to establish the multi-mode EAF harmonic model to evaluate the harmonic pollution of EAF
Summary
The electric arc furnace (EAF) is a widely used device in the iron and steel industry and it injects harmonic current into the power system and produces harmonic voltage at the point of common coupling (PCC) [1]. A small reduction in harmonic pollution represents a significant electrical energy saving since EAF works in the range between several megavolt amperes (MVA) and 250 MVA [2,3,4,5] In this context, there is a need for an EAF harmonic model to analyze the undesirable disturbing effects of harmonics in the harmonic power-flow calculation. The time-domain simulation method was developed to model EAF for the flicker study [6,7,8,9] It is relatively complex for the established time-domain model to analyze the undesirable disturbing effects of harmonics due to the solution of the time-domain differential equations
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